outboards.yamaha-owners-manuals.com · title: 150hp owner's manual author: yamaha motor corp....

150

OWNER’S MANUAL

64C-28199-1C

U.S.A.EditionLIT-18626-06-98

64C-9-1C Hyoshi 06.2.9 3:56 PM ページ 1

©2019 Yamaha M

otor Corporation, U.S.A.

EMU25060

ZMU01690

Read this owner’s manual carefully before operating your outboard motor.

64C-9-1C Hyoshi 06.2.9 3:56 PM ページ 2

©2019 Yamaha M


Important manual information

EMU31280

To the owner

Thank you for choosing a Yamaha outboardmotor. This Owner’s Manual contains infor-mation needed for proper operation, mainte-nance and care. A thorough understandingof these simple instructions will help you ob-tain maximum enjoyment from your newYamaha. If you have any question about theoperation or maintenance of your outboardmotor, please consult a Yamaha dealer.In this Owner’s Manual particularly importantinformation is distinguished in the followingways.

The Safety Alert Symbol meansATTENTION! BECOME ALERT! YOURSAFETY IS INVOLVED!

WARNING

EWM00780

Failure to follow WARNING instructionscould result in severe injury or death tothe machine operator, a bystander, or aperson inspecting or repairing the out-

board motor.

CAUTION:

ECM00700

A CAUTION indicates special precautionsthat must be taken to avoid damage to the

outboard motor.

NOTE:

A NOTE provides key information to make

procedures easier or clearer.

Yamaha continually seeks advancements inproduct design and quality. Therefore, whilethis manual contains the most current prod-uct information available at the time of print-ing, there may be minor discrepanciesbetween your machine and this manual. Ifthere is any question concerning this manu-

al, please consult your Yamaha dealer.

NOTE:

The 150TR and the standard accessoriesare used as a base for the explanations andillustrations in this manual. Therefore some

items may not apply to every model.

EMU25110

150OWNER’S MANUAL

©2006 by Yamaha Motor Corporation, USA1st edition, April 2006

All rights reserved.Any reprinting or unauthorized usewithout the written permission ofYamaha Motor Corporation, USA

is expressly prohibited.Printed in Japan

P/N LIT-18626-06-98

©2019 Yamaha M


Table of contents

General information .......................... 1

Identification numbers record.......... 1

Outboard motor serial number .......... 1Key number....................................... 1

Emission control information ........... 1

North American models..................... 1

Safety information ........................... 2Important labels............................... 3

Warning labels .................................. 3

Basic boating rules (Rules of the road) ........................ 4

Steering and sailing rules and sound signals.................................. 4

Rules when encountering vessels .... 5Other special situations..................... 6

Fueling instructions ......................... 8

Gasoline............................................ 9Engine oil .......................................... 9

Battery requirement......................... 9

Battery specifications ...................... 10

Propeller selection......................... 10Start-in-gear protection ................. 10

Basic components .......................... 11

Main components.......................... 11

Remote control................................ 11Remote control lever ....................... 12Neutral interlock trigger ................... 12Neutral throttle lever........................ 12Choke switch................................... 13Throttle friction adjuster................... 13Engine stop lanyard switch ............. 13Choke knob for pull type ................. 14Main switch ..................................... 14Power trim and tilt switch on

remote control or tiller handle ....... 14Power trim and tilt switch on

bottom engine cowling .................. 15Trim tab with anode ........................ 15Tilt support lever for power trim and

tilt or hydro tilt model..................... 16Top cowling lock lever

(pull up type) ................................. 16Flushing device ............................... 16Tachometer ..................................... 17Digital tachometer ........................... 17

Oil level indicators (three indicators) ...........................17

Oil level indicator (digital type) ........18Overheat warning indicator

(digital type) ..................................18Speedometer (digital type) ..............18Trim meter .......................................19Trim meter (digital type) ..................19Hour meter (digital type)..................19Trip meter ........................................20Clock ...............................................20Fuel gauge ......................................20Fuel warning indicator .....................21Low battery voltage warning

indicator ........................................21

Warning system ............................ 21

Overheat warning............................21Oil level warning and oil filter

clogging warning ...........................22

Operation ......................................... 24

Installation..................................... 24

Mounting the outboard motor ..........24

Breaking in engine ........................ 25

Gasoline and engine oil mixing chart (50:1)....................................25

Procedure for oil injection models ...25

Preoperation checks ..................... 26

Fuel .................................................26Oil ....................................................26Controls...........................................26Engine .............................................26Operation after a long period of

storage ..........................................26

Filling fuel and engine oil .............. 27

Filling fuel for models without a fuel joint.........................................27

Ring Free Fuel Additive...................27Filling oil for oil injection models......27Oil level indicator operation.............29

Operating engine .......................... 30

Feeding fuel ....................................30Starting engine ................................30

Warming up engine....................... 32

Choke start models .........................32

Shifting.......................................... 32

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Table of contents

Forward (tiller handle and remote control models) ............................. 33

Reverse (automatic reverse lock and power trim and tilt models)..... 33

Stopping engine ............................ 33

Procedure ....................................... 33

Trimming outboard motor.............. 34

Adjusting trim angle ........................ 34Adjusting boat trim .......................... 35

Tilting up and down ....................... 36

Procedure for tilting up.................... 36Procedure for tilting down ............... 37

Cruising in shallow water .............. 38

Power trim and tilt models / power tilt models........................... 38

Cruising in other conditions........... 39

Maintenance..................................... 40

Specifications ................................ 40Transporting and storing outboard

motor ........................................... 41

Storing outboard motor ................... 41Procedure ....................................... 41Lubrication (oil injection models)..... 42Cleaning and anticorrosion

measures ...................................... 43Battery care..................................... 43Flushing power unit ......................... 43Cleaning the outboard motor .......... 44Checking painted surface of

motor............................................. 44

Periodic maintenance.................... 45

Replacement parts .......................... 45Maintenance chart .......................... 46Greasing ......................................... 48Cleaning and adjusting spark

plug ............................................... 48Checking fuel system...................... 49Inspecting fuel filter ......................... 50Cleaning fuel filter ........................... 50Inspecting idling speed ................... 51Checking water in engine oil tank ... 51Checking wiring and connectors ..... 51Exhaust leakage ............................. 51Water leakage................................. 52Checking power trim and tilt

system...........................................52Checking propeller ..........................53Removing the propeller ...................54Installing the Propeller.....................54Changing gear oil ............................54Inspecting and replacing

anode(s)........................................55Checking battery (for electric start

models) .........................................56Connecting the battery ....................57Disconnecting the battery................58Checking top cowling ......................58Coating the boat bottom..................58

Trouble Recovery............................ 59

Troubleshooting ............................ 59Temporary action in emergency ... 62

Impact damage ...............................62Replacing fuse ................................62Power trim and tilt / power tilt will

not operate....................................63Starter will not operate ....................63Emergency starting engine .............64

Engine fails to operate .................. 65

Ignition system malfunction.............65Low oil level warning activates........65

Treatment of submerged motor .... 66

Procedure........................................66

Consumer information ................... 68

Important warranty information for U.S.A. and Canada ..................... 68

YAMAHA MOTOR CORPORATION, U.S.A. OUTBOARD MOTOR TWO YEAR LIMITED WARRANTY ..... 70

IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE THE USA OR CANADA ...................... 73

©2019 Yamaha M


1

General information

EMU25170

Identification numbers record

EMU25183

Outboard motor serial number

The outboard motor serial number isstamped on the label attached to the portside of the clamp bracket.Record your outboard motor serial number inthe spaces provided to assist you in orderingspare parts from your Yamaha dealer or forreference in case your outboard motor is sto-len.

EMU25190

Key number

If a main key switch is equipped with the mo-tor, the key identification number is stampedon your key as shown in the illustration.Record this number in the space provided forreference in case you need a new key.

EMU25221

Emission control information

EMU25230

North American models

This engine conforms to U.S. EnvironmentalProtection Agency (EPA) regulations for ma-rine SI engines. See the label affixed to yourengine for details.

EMU30390

Approval label of emission control certif-icate

This label is attached to the bottom cowling.Existing Technology; N/A

1. Outboard motor serial number location

1. Key number

1. Approval label location

ZMU04660

1

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General information

2

EMU25262

Manufactured date label

This label is attached to the clamp bracket orthe swivel bracket.

EMU25362

Safety information

�

Before mounting or operating the outboardmotor, read this entire manual. Reading it

should give you an understanding of themotor and its operation.

�

Before operating the boat, read any own-er’s or operator’s manuals supplied with itand all labels. Be sure you understandeach item before operating.

�

Do not overpower the boat with this out-board motor. Overpowering the boat couldresult in loss of control. The rated power ofthe outboard should be equal to or lessthan the rated horsepower capacity of theboat. If the rated horsepower capacity ofthe boat is unknown, consult the dealer orboat manufacturer.

�

Do not modify the outboard. Modificationscould make the motor unfit or unsafe touse.

�

Incorrect propeller selection and incorrectuse may not only cause engine damage,but also adversely affect fuel consumption.Consult your dealer for correct use.

�

Never operate after drinking alcohol or tak-ing drugs. About 50% of all boating fatali-ties involve intoxication.

�

Have an approved personal flotation de-vice (PFD) on board for every occupant. Itis a good idea to wear a PFD wheneverboating. At a minimum, children and non-swimmers should always wear PFDs, andeveryone should wear PFDs when thereare potentially hazardous boating condi-tions.

�

Gasoline is highly flammable, and its va-pors are flammable and explosive. Handleand store gasoline carefully. Make surethere are no gas fumes or leaking fuel be-fore starting the engine.

�

This product emits exhaust gases whichcontain carbon monoxide, a colorless,odorless gas which may cause brain dam-age or death when inhaled. Symptoms in-

1. Manufactured date label location

EMISSION CONTROL INFORMATIONENGINE FAMILY : THIS ENGINE CONFORMS TO 2001 U.S. EPA REGULATIONS FOR MARINE SI ENGINES.REFER TO THE OWNERS MANUAL FOR MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS.FELs :SPARK PLUG :DISPLACEMENT :ADVERTISED POWER :

IDLE SPEED :SPARK PLUG GAP (mm) :FUEL : GASOLINEVALVE LASH (mm) : IN : N/A EX : N/A

cmkW

g/kW-hr rpm IN NEUTRAL

3

ZMU05230

1ZMU03552

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General information

3

clude nausea, dizziness, and drowsiness.Keep cockpit and cabin areas well ventilat-ed. Avoid blocking exhaust outlets.

�

Check throttle, shift, and steering for prop-er operation before starting the engine.

�

Attach the engine stop switch lanyard cordto a secure place on your clothing, or yourarm or leg while operating. If you acciden-tally leave the helm, the cord will pull fromthe switch, stopping the engine.

�

Know the marine laws and regulationswhere you will be boating—and obeythem. For basic boating rules, see “Rulesof the road” on page 4.

�

Stay informed about the weather. Checkweather forecasts before boating. Avoidboating in hazardous weather.

�

Tell someone where you are going: leavea Float Plan with a responsible person. Besure to cancel the Float Plan when you re-turn.

�

Use common sense and good judgmentwhen boating. Know your abilities, and besure you understand how your boat han-dles under the different boating conditionsyou may encounter. Operate within yourlimits, and the limits of your boat. Alwaysoperate at safe speeds, and keep a carefulwatch for obstacles and other traffic.

�

Always watch carefully for swimmers dur-ing the engine operation.

�

Stay away from swimming areas.

�

When a swimmer is in the water near youshift into neutral and shut off the engine.

�

Do not illegally discard empty containersused to replace or replenish oil. For thecorrect processing of empty containers,consult the dealer where you purchasedthe oil.

�

When replacing oils used to lubricate theproduct (engine or gear oil), be sure to

wipe away any spilt oil. Never pour oil with-out using a funnel or similar device. If nec-essary, verify the necessary replacementprocedure with the dealer.

�

Never illegally discard (dump) the product.Yamaha recommends consulting the deal-er on discarding the product.

Be informed about boating safety. Additionalpublications and information can be obtainedfrom many organizations, including the fol-lowing:

United States Coast Guard

Consumer Affairs Staff (G-BC) Office of Boating, Public, and Consumer Af-fairs U.S. Coast Guard Headquarters Washington, D.C. 20593-0001 Boating Safety Hotline: 1-800-368-5647

National Marine Manufacturers Associa-tion (NMMA)

401 N. Michigan Ave. Chicago, Il 60611

Marine Retailers Association of America

155 N. Michigan Ave. Chicago, Il 60601

EMU25382

Important labels

EMU25395

Warning labels

ZMU04659

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EMU25401

Label

WARNING

EWM01260

�

Be sure shift control is in neutral beforestarting engine. (except 2HP)

�

Do not touch or remove electrical partswhen starting or during operation.

�

Keep hands, hair, and clothes awayfrom flywheel and other rotating parts

while engine is running.

EMU25451

Label

ENGINE OIL ONLY

�

Pour the engine oil into this oil tank, notgasoline.

RECOMMENDED OIL:YAMALUBE 2 STROKE OUTBOARD OIL oran equivalent TC-W3 certified ouboard oil.

WARNING

EWM01270

Do not add gasoline to the oil tank. Fire

explosion could result.

EMU25500

Basic boating rules (Rules of the road)

Just as there are rules which apply when youare driving on streets and high ways, thereare waterway rules which apply when youare driving your boat. These rules are usedinternationally, and are also enforced by the

United States Coast Guard and local agen-cies. You should be aware of these rules,and follow them whenever you encounteranother vessel on the water.Several sets of rules prevail according togeographic location, but are all basically thesame as the International Rules of the Road.The rules presented here in your Owner’sManual are condensed, and have been pro-vided for your convenience only. Consultyour local U.S. Coast Guard Auxiliary or De-partment of Motor Vehicles for a completeset of rules governing the waters in whichyou will be using your boat.

EMU25510

Steering and sailing rules and sound signals

Whenever two vessels on the water meetone another, one vessel has the right-of-way; it is called the “stand-on” vessel. Thevessel which does not have the right-of-wayis called the “give-way” or “burdened” vessel.These rules determine which vessel has theright-of-way, and what each vessel shoulddo.

Stand-on vessel

The vessel with the right-of-way has the dutyto continue its course and speed, except toavoid an immediate collision. When youmaintain your direction and speed, the othervessel will be able to determine how best toavoid you.

Give-way vessel

The vessel which does not have the right-of-way has the duty to take positive and timelyaction to stay out of the way of the Stand-Onvessel. Normally, you should not cross infront of the vessel with the right-of-way. Youshould slow down or change directions brief-ly and pass behind the other vessel. Youshould always move in such a way that the

ZMU01948

©2019 Yamaha M


General information

5

operator of the other vessel can see whatyou are doing.

“The general prudential rule”

This rule is called Rule 2 in the InternationalRules and says,“In obeying and construing these rules dueregard shall be had to all dangers of naviga-tion and collision, and to any special circum-stances, which may render a departure fromthe above rules necessary in order to avoidimmediate danger.”In other words, follow the standard rules ex-cept when a collision will occur unless bothvessels try to avoid each other. If that is thecase, both vessels become “Give-Way” ves-sels.

EMU25520

Rules when encountering vessels

There are three main situations which youmay encounter with other vessels whichcould lead to a collision unless the SteeringRules are followed:

Meeting:

(you are approaching another ves-sel head-on)

Crossing:

(you are traveling across the oth-er vessel’s path)

Overtaking:

(you are passing or beingpassed by another vessel)In the following illustration, your boat is in thecenter. You should give the right-of-way toany vessels shown in white area (you are theGive-Way vessel). Any vessels in the shad-ed area must yield to you (they are the Give-Way vessels). Both you and the meetingvessel must alter course to avoid each other.

Meeting

If you are meeting another power vesselhead on, and are close enough to run the riskof collision, neither of you has the right-of-way! Both of you should alter course to avoidan accident. You should keep the other ves-sel on your port (left) side. This rule doesn’tapply if both of you will clear one another ifyou continue on your set course and speed.

Crossing

When two power driven vessels are crossingeach other’s path close enough to run therisk of collision, the vessel which has the oth-er on the starboard (right) side must keep outof the way of the other. If the other vessel ison your right, you must keep out of its way;you are the Give-Way vessel. If the othervessel is on your port (left) side, rememberthat you should maintain course and direc-tion, provided the other vessel gives you theright-of-way as it should.

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General information

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Overtaking

If you are passing another vessel, you arethe “Give-Way” vessel. This means that theother vessel is expected to maintain itscourse and speed. You must stay out of itsway until you are clear of it. Likewise, if an-other vessel is passing you, you shouldmaintain your speed and direction so that theother vessel can steer itself around you.

EMU25530

Other special situations

There are three other rules you should beaware of when driving your boat around oth-er vessels.

Narrow channels and bends

When navigating in narrow channels, youshould keep to the right when it is safe andpractical to do so. If the operator of a power-driven vessel is preparing to go around abend that may obstruct the view of other wa-ter vessels, the operator should sound a pro-longed blast on the whistle (4 to 6 seconds).If another vessel is around the bend, it tooshould sound the whistle. Even if no reply isheard, however, the vessel should still pro-ceed around the bend with caution. If younavigate such waters with your boat, you willneed to carry a portable air horn, availablefrom local marine supply stores.

Fishing vessel right-of-way

All vessels which are fishing with nets, lines

or trawls are considered to be “fishing ves-sels” under the International Rules. Vesselswith trolling lines are not considered fishingvessels. Fishing vessels have the right-of-way regardless of position. Fishing vesselscannot, however, impede the passage ofother vessels in narrow channels.

Sailing vessel right-of-way

Sailing vessels should normally be given theright-of-way. The exceptions to this are:1. When the sailing vessel is overtaking

the power-driven vessel, the power-driv-en vessel has the right-of-way.

2. Sailing vessels should keep clear of anyfishing vessel.

3. In a narrow channel, a sailing vesselshould not hamper the safe passage ofa power-driven vessel which can navi-gate only in such a channel.

Reading buoys and other markers

The waters of the United states are markedfor safe navigation by the lateral system ofbuoyage. Simply put, buoys and markershave an arrangement of shapes, colors,numbers and lights to show which side of thebuoy a boater should pass on when navigat-ing in a particular direction. The markings onthese buoys are oriented from the perspec-tive of being entered from seaward (the boat-er is going towards the port). This means thatred buoys are passed on the starboard(right) side when proceeding from open wa-ter into port, and black buoys are to port (left)side. When navigating out of port, your posi-tion with respect to the buoys should be re-versed; red buoys should be to port andblack buoys to starboard.Many bodies of water used by boaters areentirely within the boundaries of a particularstate. The Uniform State Waterway MarkingSystem has been devised for these waters.

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This system uses buoys and signs with dis-tinctive shapes and colors to show regulato-ry or advisory information. These markersare white with black letters and orangeboarders. They signify speed zones, restrict-ed areas, danger areas, and general infor-mation.Remember, markings may vary by geo-graphic location. Always consult local boat-ing authorities before driving your boat inunfamiliar waters.

©2019 Yamaha M


General information

8

EMU25540

Fueling instructions

WARNING

EWM00010

GASOLINE AND ITS VAPORS ARE HIGH-LY FLAMMABLE AND EXPLOSIVE!

�

Do not smoke when refueling, and keep

away from sparks, flames, or othersources of ignition.

�

Stop engine before refueling.

�

Refuel in a well-ventilated area. Refuelportable fuel tanks off the boat.

�

Take care not to spill gasoline. If gaso-line spills, wipe it up immediately with

ZMU01708

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General information

9

dry rags.

�

Do not overfill the fuel tank.

�

Tighten the filler cap securely after re-fueling.

�

If you should swallow some gasoline,inhale a lot of gasoline vapor, or getgasoline in your eyes, get immediatemedical attention.

�

If any gasoline spills onto your skin, im-mediately wash with soap and water.Change clothing if gasoline spills on it.

�

Touch the fuel nozzle to the filler open-ing or funnel to help prevent electro-

static sparks.

CAUTION:

ECM00010

Use only new clean gasoline which hasbeen stored in clean containers and is notcontaminated with water or foreign mat-

ter.

EMU25570

Gasoline

If knocking or pinging occurs, use a differentbrand of gasoline or premium unleaded fuel.

Gasohol

There are two types of gasohol: gasohol con-taining ethanol and that containing metha-nol. Gasohol containing ethanol can be usedif ethanol content does not exceed 10% andthe fuel meets minimum octane ratings.Yamaha does not recommended gasoholcontaining methanol because it can causefuel system damage or engine performanceproblems.

EMU25660

Engine oil

Use Yamalube 2-M outboard oil. If Ya-malube 2-M is not available, use only anoth-er outboard motor manufacturer’s factory-brand oil with TC-W3 rating.

CAUTION:

ECM01290

Serious engine damage can result fromthe use of lower quality oil, includingsome commonly available oil brands with“TC-W3” on their label. To avoid the risk,use only Yamalube 2-M or, if necessary,another outboard motor manufacturer’s

factory-brand TC-W3 oil.

EMU25690

Battery requirement

CAUTION:

ECM01060

Do not use a battery that does not meetthe specified capacity. If a battery whichdoes not meet specifications is used, theelectric system could perform poorly orbe overloaded, causing electric system

damage.

For electric start models, choose a batterywhich meets the following specifications.

Recommended gasoline:Regular unleaded gasoline with a min-imum octane rating of 86 (Pump Oc-tane Number) = (R+M)/2

Recommended engine oil:YAMALUBE 2 STROKE OUTBOARD OIL

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General information

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EMU25711

Battery specifications

EMU25742

Propeller selection

The performance of your outboard motor willbe critically affected by your choice of propel-ler, as an incorrect choice could adverselyaffect performance and could also seriouslydamage the motor. Engine speed dependson the propeller size and boat load. If enginespeed is too high or too low for good engineperformance, this will have an adverse effecton the engine.Yamaha outboard motors are fitted with pro-pellers chosen to perform well over a rangeof applications, but there may be uses wherea propeller with a different pitch would bemore appropriate. For a greater operatingload, a smaller-pitch propeller is more suit-able as it enables the correct engine speedto be maintained. Conversely, a larger-pitchpropeller is more suitable for a smaller oper-ating load.Yamaha dealers stock a range of propellers,and can advise you and install a propeller onyour outboard that is best suited to your ap-plication.

NOTE:

Select a propeller which will allow the engineto reach the middle or upper half of the oper-ating range at full throttle with the maximumboat load. If operating conditions such aslight boat loads then allow the engine r/min torise above the maximum recommendedrange, reduce the throttle setting to maintain

the engine in the proper operating range.

For instructions on propeller removal and in-stallation, see page 53.

EMU25770

Start-in-gear protection

Yamaha outboard motors or Yamaha-ap-proved remote control units are equippedwith start-in-gear protection device(s). Thisfeature permits the engine to be started onlywhen it is in neutral. Always select neutralbefore starting the engine.

Minimum cold cranking amps (CCA/SAE):

380.0 AMinimum marine cranking amps (MCA/ABYC):

502.0 AMinimum reserve capacity (RC/SAE):

124 minutes

1. Propeller diameter in inches2. Propeller pitch in inches3. Type of propeller (propeller mark)

ZMU04607

-x1 2 3

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11

Basic components

EMU25797

Main componentsNOTE:

* May not be exactly as shown; also may not be included as standard equipment on all mod-

els.

150

EMU26180

Remote control

The remote control lever actuates both theshifter and the throttle. The electrical switch-es are mounted on the remote control box.

1

4

5

67

8

9

10

1213

11

15 16

19

17

18

3

2 1410

ZMU04662

1. Power trim and tilt switch2. Flushing device3. Tilt support lever4. Anti-cavitation plate5. Trim tab (anode)6. Propeller*7. Cooling water inlet8. Anode9. Clamp bracket10. Top cowling lock lever11. Choke knob12. Top cowling13. Cooling water pilot hole14. Remote control box (side mount type)*

15. Digital tachometer*16. Digital speedometer*17. Tachometer*18. Trim meter*19. Remote oil tank*

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Basic components

12

EMU26190

Remote control lever

Moving the lever forward from the neutral po-sition engages forward gear. Pulling the le-ver back from neutral engages reverse. Theengine will continue to run at idle until the le-ver is moved about 35° (a detent can be felt).Moving the lever farther opens the throttle,and the engine will begin to accelerate.

EMU26201

Neutral interlock trigger

To shift out of neutral, first pull the neutral in-terlock trigger up.

EMU26211

Neutral throttle lever

To open the throttle without shifting into ei-ther forward or reverse, put the remote con-trol lever in the neutral position and lift theneutral throttle lever.

NOTE:

The neutral throttle lever will operate onlywhen the remote control lever is in neutral.The remote control lever will operate onlywhen the neutral throttle lever is in the closed

position.

1. Power trim and tilt switch2. Remote control lever3. Neutral interlock trigger4. Neutral throttle lever5. Main switch / choke switch6. Engine stop lanyard switch7. Throttle friction adjuster

1. Neutral “ ”

2. Forward “ ”

3. Reverse “ ”4. Shift5. Fully closed

6. Throttle7. Fully open

1. Neutral interlock trigger

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Basic components

13

EMU26221

Choke switch

To activate the choke system, press in themain switch while the key is turned to the“ ” (on) or “ ” (start) position. Thechoke system will then supply the rich fuelmixture required to start the engine. Whenthe key is released, the choke will switch offautomatically.

EMU25971

Throttle friction adjuster

A friction device provides adjustable resis-tance to movement of the throttle grip or theremote control lever, and can be set accord-ing to operator preference.To increase resistance, turn the adjusterclockwise. To decrease resistance, turn the

adjuster counterclockwise.

WARNING

EWM00031

Do not overtighten the friction adjuster. Ifthere is too much resistance, it could bedifficult to move the remote control leveror throttle grip, which could result in an

accident.

When constant speed is desired, tighten theadjuster to maintain the desired throttle set-ting.

EMU25990

Engine stop lanyard switch

The lock plate must be attached to the en-gine stop switch for the engine to run. Thelanyard should be attached to a secure placeon the operator’s clothing, or arm or leg.Should the operator fall overboard or leavethe helm, the lanyard will pull out the lockplate, stopping ignition to the engine. Thiswill prevent the boat from running away un-der power.

WARNING

EWM00120

�

Attach the engine stop switch lanyardto a secure place on your clothing, oryour arm or leg while operating.

�

Do not attach the lanyard to clothingthat could tear loose. Do not route thelanyard where it could become entan-

1. Fully open2. Fully closed

ZMU03160

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Basic components

14

gled, preventing it from functioning.

�

Avoid accidentally pulling the lanyardduring normal operation. Loss of en-gine power means the loss of moststeering control. Also, without enginepower, the boat could slow rapidly. Thiscould cause people and objects in the

boat to be thrown forward.

NOTE:

The engine cannot be started with the lock

plate removed.

EMU26011

Choke knob for pull type

To supply the engine with the rich fuel mix-ture required to start, pull out this knob.

EMU26090

Main switch

The main switch controls the ignition system;its operation is described below.

�

“ ”

(off)

With the main switch in the “ ” (off) posi-tion, the electrical circuits are off, and the keycan be removed.

�

“ ”

(on)

With the main switch in the “ ” (on) posi-tion, the electrical circuits are on, and the keycannot be removed.

�

“ ”

(start)

With the main switch in the “ ” (start) po-sition, the starter motor turns to start the en-gine. When the key is released, it returnsautomatically to the “ ” (on) position.

EMU26141

Power trim and tilt switch on remote control or tiller handle

The power trim and tilt system adjusts theoutboard motor angle in relation to the tran-som. Pressing the switch “ ” (up) trims theoutboard motor up, then tilts it up. Pressingthe switch “ ” (down) tilts the outboard mo-tor down and trims it down. When the switchis released, the outboard motor will stop in itscurrent position.

NOTE:

For instructions on using the power trim and

tilt switch, see pages 34 and 36.

1. Lanyard2. Lock plate

ZMU03903

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Basic components

15

EMU26151

Power trim and tilt switch on bottom engine cowling

The power trim and tilt switch is located onthe side of the bottom engine cowling. Press-ing the switch “ ” (up) trims the outboardmotor up, then tilts it up. Pressing the switch“ ” (down) tilts the outboard motor downand trims it down. When the switch is re-leased, the outboard motor will stop in itscurrent position.

WARNING

EWM01030

Use the power trim and tilt switch locatedon the bottom engine cowling only whenthe boat is at a complete stop with the en-gine off. Attempting to use this switchwhile the boat is moving could increasethe risk of falling overboard and coulddistract the operator, increasing the riskof collision with another boat or an obsta-

cle.

NOTE:

For instructions on using the power trim and

tilt switch, see page 36.

EMU26241

Trim tab with anode

The trim tab should be adjusted so that thesteering control can be turned to either theright or left by applying the same amount offorce.

WARNING

EWM00840

An improperly adjusted trim tab couldcause difficult steering. Always test runafter the trim tab has been installed or re-placed to be sure steering is correct. Besure you have tightened the bolt after ad-

justing the trim tab.

If the boat tends to veer the left (port side),turn the trim tab rear end to the port side “A”in the figure. If the boat tends to veer the right(starboard side), turn the trim tab end to thestarboard side “B” in the figure.

CAUTION:

ECM00840

The trim tab also serves as an anode toprotect the engine from electrochemicalcorrosion. Never paint the trim tab as it

will become ineffective as an anode.

UP

DN

ZMU03517

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Basic components

16

EMU26340

Tilt support lever for power trim and tilt or hydro tilt model

To keep the outboard motor in the tilted upposition, lock the tilt support lever to theclamp bracket.

EMU26382

Top cowling lock lever (pull up type)

To remove the engine top cowling, pull upthe lock lever(s) and lift off the cowling.When installing the cowling, check to be sureit fits properly in the rubber seal. Then lockthe cowling by moving the lever(s) down-ward.

EMU26460

Flushing device

This device is used to clean the cooling wa-ter passages of the motor using a gardenhose and tap water.

NOTE:

For details on usage, see page 43.

1. Trim tab2. Bolt3. Cap

1. Tilt support lever

1

2

3

ZMU02525

A

B

AB

ZMU01863

ZMU03979

1

1. Top cowling lock lever(s)

1. Top cowling lock lever(s)

ZMU03904

1

ZMU03905

1

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Basic components

17

EMU26470

Tachometer

This gauge shows the engine speed and hasthe following functions.

EMU26491

Digital tachometer

The tachometer shows the engine speedand has the following functions.

NOTE:

All segments of the display will light momen-tarily after the main switch is turned on and

will return to normal thereafter.

NOTE:

The water separator and engine troublewarning indicators only operate when the en-gine is equipped with the appropriate func-

tions.

EMU26540

Oil level indicators (three indicators)

The indicators on the gauge show the statusof the oil level. For details on how to read theindicators, see page 29.

CAUTION:

ECM00030

Do not operate the engine without oil. Se-

rious engine damage will occur.

1. Flushing device

1. Tachometer2. Oil level indicator

1

ZMU04011

ZMU04577

1

2

1. Tachometer2. Trim meter3. Hour meter4. Oil level indicator5. Overheat warning indicator6. Water separator warning indicator7. Engine trouble warning indicator8. Set button9. Mode button

67

2

498

5

3

1

ZMU01958

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Basic components

18

EMU26550

Oil level indicator (digital type)

This indicator shows the engine oil level. Ifthe oil level falls below the lower limit, thewarning indicator will start to blink. For fur-ther information, see page 22.

CAUTION:

ECM00030

Do not operate the engine without oil. Se-

rious engine damage will occur.

EMU26581

Overheat warning indicator (digital type)

If the engine temperature rises too high, thewarning indicator will start to blink. For fur-ther information on reading the indicator, see

page 21.

CAUTION:

ECM00050

Do not continue to run the engine if theoverheat warning indicator is on. Serious

engine damage will occur.

EMU26600

Speedometer (digital type)

This gauge shows the boat speed.

NOTE:

After the main switch is first turned on, allsegments of the display come on as a test.After a few seconds, the gauge will changeto normal operation. Watch the gauge when

1. Oil level indicators

1. Oil level indicator

ZMU04580

1

1ZMU01867

1. Overheat warning indicator

1. Speedometer2. Fuel gauge3. Trip meter/clock/voltmeter4. Warning indicator(s)

1

ZMU01868

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Basic components

19

turning on the main switch to make sure all

segments come on.

NOTE:

The speedometer displays km/h, mph, orknots, according to operator preference. Se-lect the desired unit of measurement by set-ting the selector switch on the back of the

gauge. See the illustration for settings.

EMU26610

Trim meter

This gauge shows the trim angle of your out-board motor.

NOTE:

Memorize the trim angles that work best foryour boat under different conditions. Adjustthe trim angle to the desired setting with the

power trim and tilt switch.

EMU26620

Trim meter (digital type)

This meter shows the trim angle of your out-board motor.

NOTE:

�

Memorize the trim angles that work bestfor your boat under different conditions.Adjust the trim angle to the desired usingthe power trim and tilt switch.

�

If the trim angle of your motor exceeds thetrim operating range, the top segment on

the trim meter display will blink.

EMU26650

Hour meter (digital type)

This meter shows the number of hours theengine has been run. It can be set to showthe total number of hours or the number ofhours for the current trip. The display canalso be turned on and off.

1. Cap2. Selector switch (for speed unit)3. Selector switch (for fuel sensor)

ZMU04581

ZMU01869

ZMU01870

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Basic components

20

�

Changing the display format

�

Pressing the “ ” (mode) button chang-es the display format in the following pat-tern:

�

Total hours

→

Trip hours

→

Display off

�

Resetting the trip hours

�

Simultaneously pressing the “ ” (set)and “ ” (mode) buttons for more than1 second while the trip hours are displayedresets the trip counter to 0 (zero).

NOTE:

The total number of hours the engine has

been run cannot be reset.

EMU26690

Trip meter

This gauge displays the distance the boathas traveled since the gauge was last reset.Press the “ ” (mode) button repeatedlyuntil the indicator on the face of the gaugepoints to “ ” (trip). To reset the trip meterto zero, press the “ ” (set) and “ ”(mode) buttons at the same time.

NOTE:

�

The trip distance is shown in kilometers ormiles depending upon the unit of measure-ment selected for the speedometer.

�

The trip distance is kept in memory by bat-tery power. The stored data will be lost if

the battery is disconnected.

EMU26700

Clock

Press the “ ” (mode) button repeatedlyuntil the indicator on the face of the gaugepoints to “ ” (time). To set the clock, besure the gauge is in the “ ” (time) mode.Press the “ ” (set) button; the hour displaywill begin blinking. Press the “ ” (mode)button until the desired hour is displayed.Press the “ ” (set) button again, the minutedisplay will begin blinking. Press the “ ”(mode) button until the desired minute is dis-played. Press the “ ” (set) button again tostart the clock.

NOTE:

The clock operates on battery power. Dis-connecting the battery will stop the clock.

Reset the clock after connecting the battery.

EMU26710

Fuel gauge

The fuel level is indicated by eight segments.When all segments are showing, the fueltank is full.

CAUTION:

ECM00860

The Yamaha fuel tank sensor differs fromconventional sensors. Incorrectly settingthe selector switch on the gauge will givefalse readings. Consult your Yamahadealer on how to correctly set the selec-

©2019 Yamaha M


Basic components

21

tor switch.

NOTE:

The fuel level reading can be affected by theposition of the sensor in the fuel tank and theattitude of the boat in the water. Operationwith bow-up trim or continuous turning can

give false readings.

EMU26720

Fuel warning indicator

If the fuel level decreases to one segment,the fuel level warning segment will begin toblink.

CAUTION:

ECM00880

Do not continue to operate the enginewith full throttle if a warning device hasactivated. Get back to the port within troll-

ing engine speed.

EMU26730

Low battery voltage warning indicator

If battery voltage drops, the display will auto-matically turn on and begin to blink.

CAUTION:

ECM00870

Get back to the port soon if a warning de-vice has activated. For charging the bat-

tery, consult your Yamaha dealer.

EMU26801

Warning system

CAUTION:

ECM00090

Do not continue to operate the engine if awarning device has activated. Consultyour Yamaha dealer if the problem can-

not be located and corrected.

EMU26816

Overheat warning

This engine has an overheat warning device.If the engine temperature rises too high, thewarning device will activate.

Activation of warning device

�

The engine speed will automatically de-crease to about 2000 r/min.

�

If equipped with an overheat warning indi-cator, it will light or blink.

1. Fuel level warning segment

ZMU01745

1. Low battery indicator

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Basic components

22

�

The buzzer will sound (if equipped on thetiller handle, remote control box, or mainswitch panel).

If the warning system has activated, stop theengine and check the cooling water inlet forclogging.

EMU26846

Oil level warning and oil filter clogging warning

Oil injection models

This engine has an oil level warning system.If the oil level falls below the lower limit, thewarning system will activate.

Activation of warning device

�

Engine speed will automatically decreaseto about 2000 r/min.

�

The oil level warning indicator will light orblink.

ZMU01757

ZMU04766

ZMU02630

ZMU03942

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Basic components

23

�

The buzzer will sound (if equipped on thetiller handle, remote control box, or mainswitch panel).

If the warning system has been activated,stop the engine and check for the cause.

NOTE:

The warning for oil filter clogging is similar tothe warnings for low oil level and overheat-ing. To make troubleshooting easier, checkfor engine overheating first, then oil level,

and finally oil filter clogging.

ZMU04586

ZMU03025

1. Oil filter

1. Oil filter

1

ZMU03906

1ZMU01952

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24

Operation

EMU26901

Installation

CAUTION:

ECM00110

Incorrect engine height or obstructionsto smooth water flow (such as the designor condition of the boat, or accessoriessuch as transom ladders or depth findertransducers) can create airborne waterspray while the boat is cruising. Severeengine damage may result if the motor isoperated continuously in the presence of

airborne water spray.

NOTE:

During water testing check the buoyancy ofthe boat, at rest, with its maximum load.Check that the static water level on the ex-haust housing is low enough to prevent wa-ter entry into the powerhead, when waterrises due to waves when the outboard is not

running.

EMU26910

Mounting the outboard motor

WARNING

EWM00820

�

Overpowering a boat could cause se-vere instability. Do not install an out-board motor with more horsepowerthan the maximum rating on the capac-ity plate of the boat. If the boat does nothave a capacity plate, consult the boatmanufacturer.

�

The information presented in this sec-tion is intended as reference only. It isnot possible to provide complete in-structions for every possible boat andmotor combination. Proper mountingdepends in part on experience and the

specific boat and motor combination.

WARNING

EWM00830

Improper mounting of the outboard mo-tor could result in hazardous conditionssuch as poor handling, loss of control, orfire hazards. Observe the following:

�

For permanently mounted models, yourdealer or other person experienced inproper rigging should mount the motor.If you are mounting the motor yourself,you should be trained by an experi-enced person.

�

For portable models, your dealer or oth-er person experienced in proper out-board motor mounting should show

you how to mount your motor.

Mount the outboard motor on the center line(keel line) of the boat, and ensure that theboat itself is well balanced. Otherwise theboat will be hard to steer. For boats withouta keel or which are asymmetrical, consultyour dealer.

EMU26930

Mounting height (boat bottom)

To run your boat at optimum efficiency, thewater resistance (drag) of the boat and out-board motor must be made as little as possi-ble. The mounting height of the outboard

1. Center line (keel line)

1 ZMU01873

©2019 Yamaha M


Operation

25

motor greatly affects the water resistance. Ifthe mounting height is too high, cavitationtends to occur, thus reducing the propulsion;and if the propeller tips cut the air, the enginespeed will rise abnormally and cause the en-gine to overheat. If the mounting height is toolow, the water resistance will increase andthereby reduce engine efficiency. Mount theoutboard motor so that the anti-cavitationplate is in alignment with the bottom of theboat.

NOTE:

�

The optimum mounting height of the out-board motor is affected by the boat/motorcombination and the desired use. Testruns at different heights can help deter-mine the optimum mounting height. Con-sult your Yamaha dealer or boatmanufacturer for further information on de-termining the proper mounting height.

�

For instructions on setting the trim angle of

the outboard motor, see page 34.

EMU27020

Breaking in engine

Your new engine requires a period of break-in to allow mating surfaces of moving parts towear in evenly. Correct break-in will help en-sure proper performance and longer engine

life.

CAUTION:

ECM00140

�

Failure to follow the break-in procedurecould result in reduced engine life oreven severe engine damage.

�

Premix fuel must be used during break-in in addition to oil in the oil injection

system.

EMU27060

Gasoline and engine oil mixing chart (50:1)

CAUTION:

ECM00150

Be sure to mix gasoline and oil complete-ly, otherwise the engine may be dam-

aged.

EMU30311

Procedure for oil injection models

Run the engine under load (in gear with apropeller installed) for 10 hours as follows.1. First 10 minutes:

Run the engine at the lowest possiblespeed. A fast idle in neutral is best.

2. Next 50 minutes:Do not exceed half throttle (approxi-mately 3000 r/min). Vary engine speedoccasionally. If you have an easy-plan-ing boat, accelerate at full throttle ontoplane, then immediately reduce the

ZMU01762

1. : Gasoline

2. : Engine oil

©2019 Yamaha M


Operation

26

throttle to 3000 r/min or less.3. Next two hours:

Accelerate at full throttle onto plane,then reduce engine speed to three-quar-ter throttle (approximately 4000 r/min).Vary engine speed occasionally. Run atfull throttle for one minute, then allowabout 10 minutes of operation at three-quarter throttle or less to let the enginecool.

4. Remaining seven hours:Run the engine at any speed. However,avoid operating at full throttle for morethan 5 minutes at a time.

5. After the first 10 hours:Operate the engine normally. Use onlystraight gasoline in the fuel tank. TheYamaha oil injection system providesproper lubrication for normal operation.

EMU27102

Preoperation checks

WARNING

EWM00080

If any item in the preoperation check isnot working properly, have it inspectedand repaired before operating the out-board motor. Otherwise an accident

could occur.

CAUTION:

ECM00120

Do not start the engine out of water. Over-heating and serious engine damage can

occur.

EMU27111

Fuel

�

Check to be sure you have plenty of fuelfor your trip.

�

Make sure there are no fuel leaks or gaso-line fumes.

�

Check fuel line connections to be sure theyare tight (if equipped Yamaha fuel tank or

boat tank).

�

Be sure the fuel tank is positioned on a se-cure, flat surface, and that the fuel line isnot twisted or flattened, or likely to contactsharp objects (if equipped Yamaha fueltank or boat tank).

EMU27120

Oil

�

Check to be sure you have plenty of oil foryour trip.

EMU27130

Controls

�

Check throttle, shift, and steering for prop-er operation before starting the engine.

�

The controls should work smoothly, with-out binding or unusual free play.

�

Look for loose or damaged connections.

�

Check operation of the starter and stopswitches when the outboard motor is in thewater.

EMU27140

Engine

�

Check the engine and engine mounting.

�

Look for loose or damaged fasteners.

�

Check the propeller for damage.

EMU27170

Operation after a long period of storage

When operating the engine after a long peri-od (12 months) of storage, proceed as fol-lows:1. Use a 50:1 gasoline-oil mixture to start

the engine.2. Start the engine. Leave it idling.

WARNING

EWM00090

�


�

Keep hands, hair, and clothes awayfrom the flywheel and other rotating

parts while the engine is running.

3. Watch for oil flowing through the oil feed

©2019 Yamaha M


Operation

27

pipes. After any air in the oil lines hasbeen expelled, the oil injection systemshould supply oil normally. If no oil isflowing after 10 minutes of idling, consultyour Yamaha dealer.

CAUTION:

ECM00130

Be sure to take the above steps when op-erating the engine after a long period ofstorage. Otherwise engine seizure could

occur.

EMU27233

Filling fuel and engine oil

EMU30320

Filling fuel for models without a fuel joint

WARNING

EWM00060

Gasoline and its vapors are highly flam-mable and explosive. Keep away fromsparks, cigarettes, flames, or other

sources of ignition.

1. Remove the fuel tank cap.2. Carefully fill the fuel tank.3. Securely close the cap after filling the

tank. Wipe up any spilled fuel.

EMU27270

Ring Free Fuel Additive

Gasoline is a precise blend of many differentsubstances, each chosen to give certaincharacteristics. Gasoline blends have been

changing in recent years in response to con-cerns about pollution and resulting emis-sions regulations. One of the most obviouschanges has been the elimination of leadfrom most fuels.As gasoline has changed, the amount of ad-ditives such as aromatics and oxygenateshas increased. These additives are impor-tant for the engines in passenger cars, butthey can have detrimental effects in marineengines, because of increased deposits inthe combustion chamber. When enough de-posits collect, piston rings begin sticking.Performance drops and engine wear in-creases dramatically.While many additives available may reducedeposits, Yamaha recommends the use of

Ring Free Fuel Additive

, available fromyour Yamaha dealer.

Ring Free Fuel Addi-tive

has repeatedly proven its ability to cleancombustion deposits from inside the engine,notably the critical piston-ring-land area, andfuel system components. Follow product la-beling for use instructions.

EMU27292

Filling oil for oil injection models

WARNING

EWM00530

Do not add gasoline into the oil tank. Fire

or explosion could result.

This engine uses the Yamaha oil injectionsystem, which provides superior lubricationby ensuring the proper oil ratio for all operat-ing conditions. No fuel premixing is needed.Simply pour gasoline into the fuel tank andoil into the oil tank. Convenient indicatorsshow the status of the oil supply. For detailson how to read the indicators, see page 29.To fill the engine oil tank, proceed as follows:

ZMU03907

©2019 Yamaha M


Operation

28

1. Pour engine oil into the remote oil tank.

NOTE:

The oil level lines on the remote oil tank indi-cate the amount of additional oil that can beadded to the tank. The top oil level line indi-cates approximately 1.9 L (0.5 US gal, 0.4Imp gal) can be added, and the bottom oillevel line indicates approximately 3.8 L (1 US

gal, 0.8 Imp gal) can be added.

2. Turn on the main switch. The Yamahaoil injection system will automaticallyfeed oil from the remote oil tank to theengine oil tank.

3. Operate the engine normally.

CAUTION:

ECM00570

When the engine is operated for the firsttime or stored for a period of time, a min-imum of 5 liters (5.3 US qt, 4.4 Imp qt) ofoil should be kept in the remote oil tank.Otherwise the oil-feed pump chamber willnot be filled with oil, and no oil will be

supplied.

Remote oil tank capacity:10.5 L (11.10 US qt) (9.24 Imp.qt)

ZMU01877

©2019 Yamaha M


Operation

29

EMU27321

Oil level indicator operation

The various functions of the oil level system are as follows:

EMU27381

Oil level indicator

Electric start models

Oil level warning indicator (digital

tachometer)

Oil level warning indicator (analog

tachometer)

Engine oil tank

Remote oil tank

Remarks

Green

more than 300

cm

3

(0.32 US qt, 0.26

Imp qt)

more than

1500 cm

3

(1.6 US qt, 1.31

Imp qt)

�

No refilling necessary.

Yellow

more than 300

cm

3

(0.32 US qt, 0.26

Imp qt)

1500 cm

3

(1.6 US qt, 1.31 Imp qt) or less

�

Add oil; see page 27.

Red–Yellow–Green

300 cm

3

(0.32 US qt, 0.26

Imp qt) or less

more than

1500 cm

3

(1.6 US qt, 1.31 Imp qt)

�

Check oil filter for clog-ging.

�

Check battery cable connection. Buzzer will sound.

�

Engine speed is auto-matically reduced to about 2000 r/min.

Red

300 cm

3

(0.32 US qt, 0.26

Imp qt) or less

1500 cm

3

(1.6 US qt, 1.31 Imp qt) or less

�

Oil has not been added.

�

Buzzer will sound.

�

Engine speed is auto-matically reduced to about 2000 r/min.

�

Buzzer sounds in remote control box and engine speed is limited to about 2000 r/min to help conserve oil.

©2019 Yamaha M


Operation

30

EMU27450

Operating engine

EMU27482

Feeding fuel

WARNING

EWM00420

�

Before starting the engine, make surethat the boat is tightly moored and thatyou can steer clear of any obstructions.Be sure there are no swimmers in thewater near you.

�

When the air vent screw is loosened,gasoline vapor will be released. Gaso-line is highly flammable, and its vaporsare flammable and explosive. Refrainfrom smoking, and keep away fromopen flames and sparks while loosen-ing the air vent screw.

�

This product emits exhaust gaseswhich contain carbon monoxide, a col-orless, odorless gas which could causebrain damage or death when inhaled.Symptoms include nausea, dizziness,and drowsiness. Keep cockpit and cab-in areas well ventilated. Avoid blocking

exhaust outlets.

1. If there is an air vent screw on the fueltank cap, loosen it 2 or 3 turns.

2. If there is a fuel joint or a fuel cock on theboat, firmly connect the fuel line to thejoint or open the fuel cock.

3. Squeeze the primer pump, with the ar-row pointing up, until you feel it becomefirm.

EMU27490

Starting engine

EMU27642

Electric start / remote control models

1. Place the remote control lever in neutral.

NOTE:

The start-in-gear protection device preventsthe engine from starting except when in neu-

tral.

2. Attach the engine stop switch lanyard toa secure place on your clothing, or yourarm or leg. Then install the lock plate onthe other end of the lanyard into the en-gine stop switch.

WARNING

EWM00120

�

Attach the engine stop switch lanyardto a secure place on your clothing, or

1. Arrow

©2019 Yamaha M


Operation

31

your arm or leg while operating.

�

Do not attach the lanyard to clothingthat could tear loose. Do not route thelanyard where it could become entan-gled, preventing it from functioning.

�

Avoid accidentally pulling the lanyardduring normal operation. Loss of en-gine power means the loss of moststeering control. Also, without enginepower, the boat could slow rapidly. Thiscould cause people and objects in the

boat to be thrown forward.

3. Turn the main switch to “ ” (on).

4. Open the throttle slightly without shiftingusing the neutral throttle lever or free ac-celerator. You may need to change thethrottle opening slightly depending onengine temperature. After the enginestarts, return the throttle to the originalposition.

NOTE:

�

On remote controls equipped with a neu-tral throttle lever, a good starting point is tolift the lever just until you feel resistance,then lift slightly more.

�

The neutral throttle lever or free accelera-tor can only be used when the remote con-

trol lever is in neutral.

5. Press in and hold the main switch to op-erate the remote choke system. The re-mote choke switch automatically returnsto its normal position when you releaseyour hand. Therefore keep the switchpressed in.

NOTE:

�

It is not necessary to use the choke whenstarting a warm engine.

�

Push in the main switch fully, or the remote

choke system will not operate.

6. Turn the main switch to “ ” (start),and hold it for a maximum of 5 seconds.

OFF

ON

ZMU01880

N

ZMU02314

©2019 Yamaha M


Operation

32

7. Immediately after the engine starts, re-lease the main switch and allow it to re-turn to “ ” (on).

CAUTION:

ECM00191

�

Never turn the main switch to “ ”(start) while the engine is running.

�

Do not keep the starter motor turningfor more than 5 seconds. If the startermotor is turned continuously for morethan 5 seconds, the battery will bequickly discharged, thus making it im-possible to start the engine. The startercan also be damaged. If the engine willnot start after 5 seconds of cranking,return the main switch to “ ” (on), wait10 seconds, then crank the engine

again.

EMU27670

Warming up engine

EMU27681

Choke start models

1. After starting the engine, allow it to idlefor 3 minutes to warm up. Failure to doso will shorten engine life. Gradually re-turn the choke knob to its home positionas the engine warms up.

2. Check for a steady flow of water from the

cooling water pilot hole.

CAUTION:

ECM00511

A continuous flow of water from the cool-ing water pilot hole shows that the waterpump is pumping water through the cool-ing passages. If water is not flowing outof the hole at all times while the engine isrunning, overheating and serious dam-age could occur. Stop the engine andcheck whether the cooling water inlet onthe lower case or the cooling water pilothole is blocked. Consult your Yamahadealer if the problem cannot be located

and corrected.

EMU27740

Shifting

WARNING

EWM00180

Before shifting, make sure there are noswimmers or obstacles in the water near

you.

CAUTION:

ECM00220

To change the boat direction or shiftingposition from forward to reverse or vice-versa, first close the throttle so that the

engine idles (or runs at low speeds).

ZMU03262

ONSTARTOFF

ZMU03908

©2019 Yamaha M


Operation

33

EMU27764

Forward (tiller handle and remote control models)

Tiller handle models1. Place the throttle grip in the fully closed

position.2. Move the gear shift lever quickly and

firmly from neutral to forward.Remote control models1. Pull up the neutral interlock trigger (if

equipped) and move the remote controllever quickly and firmly from neutral toforward.

EMU27785

Reverse (automatic reverse lock and power trim and tilt models)

WARNING

EWM00190

When operating in reverse, go slowly. Donot open the throttle more than half. Oth-erwise the boat could become unstable,

which could result in loss of control and

an accident.

Tiller handle models1. Place the throttle grip in the fully closed

position.2. Move the gear shift lever quickly and

firmly from neutral to reverse.Remote control models1. Pull up the neutral interlock trigger (if

equipped) and move the remote controllever quickly and firmly from neutral toreverse.

EMU27820

Stopping engine

Before stopping the engine, first let it cool offfor a few minutes at idle or low speed. Stop-ping the engine immediately after operatingat high speed is not recommended.

EMU27844

Procedure

1. Push and hold the engine stop button or

UP

DN

ZMU03909

UP

DN

ZMU03909

©2019 Yamaha M


Operation

34

turn the main switch to “ ” (off).

2. After stopping the engine, disconnectthe fuel line if there is a fuel joint on theoutboard motor.

3. Tighten the air vent screw on the fueltank cap (if equipped).

4. Remove the key if the boat will be leftunattended.

NOTE:

The engine can also be stopped by pullingthe lanyard and removing the lock plate fromthe engine stop switch, then turning the main

switch to “ ” (off).

EMU27861

Trimming outboard motor

The trim angle of the outboard motor helpsdetermine the position of the bow of the boatin the water. Correct trim angle will help im-prove performance and fuel economy whilereducing strain on the engine. Correct trim

angle depends upon the combination ofboat, engine, and propeller. Correct trim isalso affected by variables such as the load inthe boat, sea conditions, and running speed.

WARNING

EWM00740

Excessive trim for the operating condi-tions (either trim up or trim down) cancause boat instability and can makesteering the boat more difficult. This in-creases the possibility of an accident. Ifthe boat begins to feel unstable or is hardto steer, slow down and/or readjust the

trim angle.

EMU27882

Adjusting trim angle

Power trim and tilt models

WARNING

EWM00751

�

Be sure all people are clear of the out-

ZMU02301

1. Trim operating angle

ZMU03441

1

©2019 Yamaha M


Operation

35

board motor when adjusting the tilt an-gle, also be careful not to pinch anybody parts between the drive unit andclamp bracket.

�

Use caution when trying a trim positionfor the first time. Increase speed gradu-ally and watch for any signs of instabil-ity or control problems. Improper trimangle can cause loss of control.

�

If equipped with a power trim and tiltswitch located on the bottom cowling,use the switch only when the boat is ata complete stop with the engine off. Donot adjust the trim angle with this

switch while the boat is moving.

Adjust the outboard motor trim angle usingthe power trim and tilt switch.

To raise the bow (trim-out), press the switch“ ” (up).To lower the bow (trim-in), press the switch“ ” (down).Make test runs with the trim set to differentangles to find the position that works best foryour boat and operating conditions.

EMU27911

Adjusting boat trim

When the boat is on plane, a bow-up attituderesults in less drag, greater stability and effi-ciency. This is generally when the keel line ofthe boat is up about 3 to 5 degrees. With thebow up, the boat may have a greater tenden-cy to steer to one side or the other. Compen-sate for this as you steer. The trim tab canalso be adjusted to help offset this effect.When the bow of the boat is down, it is easierto accelerate from a standing start ontoplane.

Bow Up

Too much trim-out puts the bow of the boattoo high in the water. Performance and econ-omy are decreased because the hull of theboat is pushing the water and there is moreair drag. Excessive trim-out can also causethe propeller to ventilate, which reduces per-formance further, and the boat may “por-poise” (hop in the water), which could throwthe operator and passengers overboard.

1. Power trim and tilt switch

1. Power trim and tilt switch

UP

DNZMU03522

1

©2019 Yamaha M


Operation

36

Bow Down

Too much trim-in causes the boat to “plow”through the water, decreasing fuel economyand making it hard to increase speed. Oper-ating with excessive trim-in at higher speedsalso makes the boat unstable. Resistance atthe bow is greatly increased, heightening thedanger of “bow steering” and making opera-tion difficult and dangerous.

NOTE:

Depending on the type of boat, the outboardmotor trim angle may have little effect on the

trim of the boat when operating.

EMU27933

Tilting up and down

If the engine will be stopped for some time orif the boat is moored in shallows, the out-board motor should be tilted up to protect thepropeller and casing from damage by colli-sion with obstructions, and also to reduce

salt corrosion.

WARNING

EWM00220

Be sure all people are clear of the out-board motor when tilting up and down,also be careful not to pinch any bodyparts between the drive unit and engine

bracket.

WARNING

EWM00250

Leaking fuel is a fire hazard. If there is afuel joint on the outboard motor, discon-nect the fuel line or close the fuel cock ifthe engine will be tilted for more than a

few minutes. Otherwise fuel may leak.

CAUTION:

ECM00241

�

Before tilting the outboard motor, stopthe engine by following the procedureon page 33. Never tilt the outboard mo-tor while the engine is running. Severedamage from overheating can result.

�

Do not tilt up the engine by pushing thetiller handle (if equipped) because this

could break the handle.

EMU28006

Procedure for tilting up

Power trim and tilt models / power tilt models1. Place the remote control lever / gear

shift lever in neutral.

©2019 Yamaha M


Operation

37

2. Disconnect the fuel line from the out-board motor or close the fuel cock.

3. Press the power trim and tilt switch /power tilt switch “ ” (up) until the out-board motor has tilted up completely.

4. Push the tilt support knob into the clampbracket or pull the tilt support lever to-ward you to support the engine.

WARNING

EWM00260

After tilting the outboard motor, be sure

to support it with the tilt support knob ortilt support lever. Otherwise the outboardmotor could fall back down suddenly if oilin the power trim and tilt unit loses pres-

sure.

5. Models equipped with trim rods: Oncethe outboard motor is supported with thetilt support lever, press the power trimand tilt switch / power tilt switch “ ”(down) to retract the trim rods.

CAUTION:

ECM00250

Be sure to retract the trim rods complete-ly during mooring. This protects the rodsfrom marine growth and corrosion whichcould damage the power trim and tilt

mechanism.

EMU28054

Procedure for tilting down

Power trim and tilt models / power tilt models1. Push the power trim and tilt switch / pow-

er tilt switch “ ” (up) until the outboardmotor is supported by the tilt rod and thetilt support lever / tilt support knob be-comes free.

2. Release the tilt support lever or pull outthe tilt support knob.

UP

ZMU03523

ZMU03432

ZMU03997

©2019 Yamaha M


Operation

38

3. Push the power trim and tilt switch / pow-er tilt switch “ ” (down) to lower the out-board motor to the desired position.

EMU28060

Cruising in shallow water

The outboard motor can be tilted up partiallyto allow operation in shallow water.

EMU28090

Power trim and tilt models / power tilt models

The outboard motor can be tilted up partially

to allow operation in shallow water.

WARNING

EWM00660

�

Place the gear shift in neutral beforesetting up for shallow water cruising.

�

Return the outboard motor to its normalposition as soon as the boat is back in

deeper water.

CAUTION:

ECM00260

Do not tilt the outboard motor up so thatthe cooling water inlet on the lower unit isabove the surface of the water when set-ting up for and cruising in shallow water.Otherwise severe damage from overheat-

ing can result.

EMU28185

Procedure for power trim and tilt / powertilt models

1. Place the remote control lever / gearshift lever in neutral.

2. Slightly tilt the outboard motor up to thedesired position using the power trimand tilt switch / power tilt switch.

ZMU03453

DN

ZMU01936

UP

DN

DN

ZMU03524

©2019 Yamaha M


Operation

39

3. To return the outboard motor to the nor-mal running position, press the powertrim and tilt switch / power tilt switch andslowly tilt the outboard motor down.

EMU28192

Cruising in other conditions

Cruising in salt water

After operating in salt water, flush the coolingwater passages with fresh water to preventthem from becoming clogged with salt de-posits.

NOTE:

For cooling system flushing instructions, see

page 41.

Cruising in turbid water

Yamaha strongly recommends that you usethe optional chromium-plated water pump kit(not available for some models) if you usethe outboard motor in turbid or muddy waterconditions.

UP

ZMU01935

UP

DN

UP

ZMU03527

©2019 Yamaha M


40

Maintenance

EMU31480

SpecificationsNOTE:

“(AL)” stated in the specification data belowrepresents the numerical value for the alumi-num propeller installed.Likewise, “(SUS)” represents the value forstainless steel propeller installed and “(PL)”

for plastic propeller installed.

EMU28218

Dimension:

Overall length: 823 mm (32.4 in)

Overall width: 577 mm (22.7 in)

Overall height L: 1615 mm (63.6 in)

Overall height X: 1742 mm (68.6 in)

Transom height L: 516 mm (20.3 in)

Transom height X: 642 mm (25.3 in)

Weight (without propeller) X: 194.0 kg (428 lb)

Performance:

Full throttle operating range: 4500–5500 r/min

Maximum output: 110.3 kW@5000 r/min (150 HP@5000 r/min)

Idling speed (in neutral): 700

±

25 r/min

Engine:

Type: 2-stroke V

Displacement: 2596.0 cm

3

(158.41 cu.in)Bore

×

stroke: 90.0

×

68.0 mm (3.54

×

2.68 in)

Ignition system: CDI (micro computer)

Spark plug with resistor (NGK): BR7HS-10

Spark plug gap: 0.9–1.0 mm (0.035–0.039 in)

Control system: Remote control

Starting system: Electric

Starting carburetion system: Choke valve

Min. cold cranking amps (CCA/SAE): 380.0 A

Min. marine cranking amps (MCA/ABYC): 502.0 A

Min. reserve capacity (RC/SAE): 124 minutes

Alternator output for battery DC: 25.0 A

Drive unit:

Gear positions: Forward-neutral-reverse

Gear ratio: 1.86 (26/14)

Trim and tilt system: Power trim and tilt

Propeller mark: M

Fuel and oil:

Recommended fuel: Regular unleaded gasoline

Min. pump octane: 86

Recommended engine oil: YAMALUBE 2-stroke outboard motor oil

Lubrication: Oil injection

Engine oil tank capacity: 0.9 L (0.95 US qt) (0.79 Imp.qt)

©2019 Yamaha M


Maintenance

41

Remote oil tank capacity: 10.5 L (11.10 US qt) (9.24 Imp.qt)

Recommended gear oil: Hypoid gear oil SAE#90

Gear oil quantity: 980.0 cm

3

(33.13 US oz) (34.56 Imp.oz)

Tightening torque for engine:

Spark plug: 25.0 Nm (18.4 ft-lb) (2.55 kgf-m)

Propeller nut: 55.0 Nm (40.6 ft-lb) (5.61 kgf-m)

EMU28222

Transporting and storing outboard motor

WARNING

EWM00690

�

Leaking fuel is a fire hazard. Whentransporting and storing the outboardmotor, close the air vent screw and fuelcock to prevent fuel from leaking.

�

USE CARE when transporting fuel tank,whether in a boat or car.

�

DO NOT fill fuel container to maximumcapacity. Gasoline will expand consid-erably as it warms up and can build uppressure in the fuel container. This cancause fuel leakage and a potential fire

hazard.

WARNING

EWM00700

Never get under the lower unit while it istilted, even if a motor support bar is used.Severe injury could occur if the outboard

motor accidentally falls.

CAUTION:

ECM00660

Do not use the tilt support lever or knobwhen trailering the boat. The outboardmotor could shake loose from the tilt sup-

port and fall. If the motor cannot be trail-ered in the normal running position, usean additional support device to secure it

in the tilt position.

The outboard motor should be trailered andstored in the normal running position. If thereis insufficient road clearance in this position,then trailer the outboard motor in the tilt po-sition using a motor support device such asa transom saver bar. Consult your Yamahadealer for further details.

EMU30272

Storing outboard motor

When storing your Yamaha outboard motorfor prolonged periods of time (2 months orlonger), several important procedures mustbe performed to prevent excessive damage.It is advisable to have your outboard motorserviced by an authorized Yamaha dealerprior to storage. However, you, the owner,with a minimum of tools, can perform the fol-lowing procedures.

CAUTION:

ECM01411

�

Do not place the outboard motor on itsside before the cooling water hasdrained from it completely, otherwisewater may enter the cylinder throughthe exhaust port and cause engine trou-ble.

�

Store the outboard motor in a dry, well-

ventilated place, not in direct sunlight.

EMU28302

Procedure

EMU28380

Flushing with the flushing attachment

1. Wash the outboard motor body usingfresh water. For further information, seepage 44.

2. Fill the fuel tank with fresh fuel and addone ounce of “Yamaha Fuel Conditioner

©2019 Yamaha M


Maintenance

42

and Stabilizer” (Part No. LUB-FUELC-12-00) to each gallon of fuel.

NOTE:

The use of “Yamaha Fuel Conditioner andStabilizer” eliminates the need to drain thefuel system. Consult your Yamaha dealer orother qualified mechanic if the fuel system is

to be drained instead.

3. Remove the top cowling and silencercover/cap. Remove the propeller.

4. Install the flushing attachment over thecooling water inlet.

CAUTION:

ECM00300

Do not run the engine without supplyingit with cooling water. Either the enginewater pump will be damaged or the en-gine will be damaged from overheating.Before starting the engine, be sure tosupply water to the cooling water passag-

es.

CAUTION:

ECM00310

Avoid running the outboard motor at highspeed while on the flushing attachment,

otherwise overheating could occur.

5. Cooling system flushing is essential toprevent the cooling system from clog-

ging up with salt, sand, or dirt. In addi-tion, fogging/lubricating of the engine ismandatory to prevent excessive enginedamage due to rust. Perform the flush-ing and fogging at the same time.

WARNING

EWM00090

�


�



6. Run the engine at a fast idle for 10–15minutes in neutral position while supply-ing fresh water.

7. Just prior to turning off the engine, quick-ly spray “Yamaha Stor-Rite EngineFogging Oil” (Part No. LUB-STRRT-12-00) alternately into each carburetor/each intake manifold. When properlydone, the engine will smoke excessivelyand almost stall.

8. Remove the flushing attachment andwipe off any excess water.

9. Install the silencer cover/cap and topcowling. Install the propeller.

NOTE:

A flushing attachment is available from your

Yamaha dealer.

EMU28410

Lubrication (oil injection models)

1. Grease the spark plug threads and in-stall the spark plug(s) and torque toproper specification. For information onspark plug installation, see page 48.

2. Fill the oil tanks. This prevents the for-mation of condensation. For models witha remote oil tank, it may be necessary tomanually override the control unit tocompletely fill the engine oil tank.

1. Flushing attachment

©2019 Yamaha M


Maintenance

43

3. Change the gear oil. For instructions,see page 54. Inspect the oil for the pres-ence of water which indicates a leakyseal. Seal replacement should be per-formed by an authorized Yamaha dealerprior to use.

4. Grease all grease fittings. For further de-tails, see page 48.

EMU28421

Cleaning and anticorrosion measures

1. Wash down the exterior of the outboardmotor with fresh water and dry off com-pletely.

2. Spray the outboard motor exterior with“Yamaha Silicone Protectant” (Part No.LUB-SILCNE-13-00).

3. Wax the cowling with a non-abrasivewax such as “Yamaha Silicone Wax”(Part No. ACC-11000-15-02).

EMU28430

Battery care

WARNING

EWM00330

Battery electrolytic fluid is dangerous; itcontains sulfuric acid and therefore ispoisonous and highly caustic.Always follow these preventive mea-sures:

�

Avoid bodily contact with electrolyticfluid as it can cause severe burns orpermanent eye injury.

�

Wear protective eye gear when han-dling or working near batteries.

Antidote (EXTERNAL):

�

SKIN - Flush with water.

�

EYES - Flush with water for 15 minutesand get immediate medical attention.

Antidote (INTERNAL):

�

Drink large quantities of water or milkfollowed by milk of magnesia, beatenegg, or vegetable oil. Get immediate

medical attention.Batteries also generate explosive hydro-gen gas; therefore, you should alwaysfollow these preventive measures:

�

Charge batteries in a well-ventilated ar-ea.

�

Keep batteries away from fire, sparks,or open flames (for example: weldingequipment, lighted cigarettes, and soon.)

�

DO NOT SMOKE when charging or han-dling batteries.

KEEP BATTERIES AND ELECTROLYTIC

FLUID OUT OF REACH OF CHILDREN.

Batteries vary among manufacturers. There-fore the following procedures may not al-ways apply. Consult your batterymanufacturer’s instructions.Procedure1. Disconnect and remove the battery from

the boat. Always disconnect the blacknegative cable first to prevent the risk ofshorting.

2. Clean the battery casing and terminals.Fill each cell to the upper level with dis-tilled water.

3. Store the battery on a level surface in acool, dry, well-ventilated place out of di-rect sunlight.

4. Once a month, check the specific gravityof the electrolyte and recharge as re-quired to prolong battery life.

EMU28442

Flushing power unit

Perform this procedure right after operationfor the most thorough flushing.

CAUTION:

ECM01530

Do not perform this procedure while theengine is running. The water pump maybe damaged and severe damage from

©2019 Yamaha M


Maintenance

44

overheating can result.

1. After shutting off the engine, unscrewthe garden hose connector from the fit-ting on the bottom cowling.

2. Screw the garden hose adapter onto agarden hose, which is connected to afresh water supply, and then connect itto the garden hose connector.

3. With the engine off, turn on the water tapand let the water flush through the cool-ing passages for about 15 minutes. Turnoff the water and disconnect the gardenhose adapter from the garden hose con-nector.

4. Reinstall the garden hose connectoronto the fitting on the bottom cowling.

Tighten the connector securely.

CAUTION:

ECM00540

Do not leave the garden hose connectorloose on the bottom cowling fitting or letthe hose hang free during normal opera-tion. Water will leak out of the connectorinstead of cooling the engine, which cancause serious overheating. Be sure theconnector is tightened securely on the fit-

ting after flushing the engine.

NOTE:

�

When flushing the engine with the boat inthe water, tilting up the outboard motor un-til it is completely out of the water willachieve better results.

�

For cooling system flushing instructions,

see page 41.

EMU28450

Cleaning the outboard motor

After use, wash the exterior of the outboardmotor with fresh water. Flush the coolingsystem with fresh water.

NOTE:

For cooling system flushing instructions, see

page 41.

EMU28460

Checking painted surface of motor

Check the motor for scratches, nicks, or flak-ing paint. Areas with damaged paint are

1. Fitting2. Garden hose connector3. Garden hose adapter

2 31

ZMU03556

ZMU02550

©2019 Yamaha M


Maintenance

45

more likely to corrode. If necessary, cleanand paint the areas. A touch-up paint is avail-able from your Yamaha dealer.

EMU28486

Periodic maintenance

WARNING

EWM01070

Be sure to turn off the engine when youperform maintenance unless otherwisespecified. If you or the owner is not famil-iar with machine servicing, this workshould be done by your Yamaha dealer or

other qualified mechanic.

Maintenance, replacement, or repair ofthe emission control devices and sys-tems may be performed by any marineengine repair establishment or individual.All warranty repairs, however, includingthose to the emission control system,must be performed by an authorizedYamaha marine dealership.

A service manual is available for purchasethrough your Yamaha dealer for owners whohave the mechanical skills, tools, and otherequipment necessary to perform mainte-nance not covered by this owner’s manual.

EMU28510

Replacement parts

If replacement parts are necessary, use onlygenuine Yamaha parts or parts of the sametype and of equivalent strength and materi-als. Any part of inferior quality may malfunc-tion, and the resulting loss of control couldendanger the operator and passengers.Yamaha genuine parts and accessories areavailable from your Yamaha dealer.

©2019 Yamaha M


Maintenance

46

EMU28522

Maintenance chart

Frequency of maintenance operations may be adjusted according to the operating condi-tions, but the following table gives general guidelines. Refer to the sections in this chapter forexplanations of each owner-specific action.

NOTE:

When operating in salt water, turbid or muddy water, the engine should be flushed with clean

water after each use.

The “ ” symbol indicates the check-ups which you may carry out yourself.The “ ” symbol indicates work to be carried out by your Yamaha dealer.

Item Actions

Initial Every

10 hours (1 month)

50 hours (3

months)

100 hours (6 months)

200 hours (1

year)

Anode(s) (external)Inspection / replace-ment

Anode(s) (internal)Inspection / replace-ment

Battery Inspection / charging

Cooling water pas-sages

Cleaning

Cowling clamp Inspection

Fuel filter (can be dis-assembled)

Inspection / cleaning

Fuel system Inspection

Gear oil Change

Greasing points Greasing

Idling speed (carbure-tor models)

Inspection

PCV (Pressure Con-trol Valve)

Inspection

Power trim and tilt unit Inspection

Propeller and cotter pinInspection / replace-ment

Shift link / shift cable Inspection / adjustment

ThermostatInspection / replace-ment

Throttle link / throttle cable / throttle pick-up timing

Inspection / adjustment

©2019 Yamaha M


Maintenance

47

Water pumpInspection / replace-ment

Oil pump Inspection / adjustment

Oil tank water drain Inspection / cleaning

Spark plug(s)Cleaning / adjustment / replacement

Item Actions

Initial Every

10 hours (1 month)

50 hours (3

months)

100 hours (6 months)

200 hours (1

year)©2019 Yamaha M


Maintenance

48

EMU28931

Greasing

Yamaha marine grease (Water resistant grease)

150

EMU28952

Cleaning and adjusting spark plug

WARNING

EWM00560

When removing or installing a spark plug,be careful not to damage the insulator. Adamaged insulator could allow external

sparks, which could lead to explosion or

fire.

The spark plug is an important engine com-ponent and is easy to inspect. The conditionof the spark plug can indicate somethingabout the condition of the engine. For exam-

ZMU03912

©2019 Yamaha M


Maintenance

49

ple, if the center electrode porcelain is verywhite, this could indicate an intake air leak orcarburetion problem in that cylinder. Do notattempt to diagnose any problems yourself.Instead, take the outboard motor to aYamaha dealer. You should periodically re-move and inspect the spark plug becauseheat and deposits will cause the spark plugto slowly break down and erode. If electrodeerosion becomes excessive, or if carbon andother deposits are excessive, you should re-place the spark plug with another of the cor-rect type.

Before fitting the spark plug, measure theelectrode gap with a wire thickness gauge;adjust the gap to specification if necessary.

When fitting the plug, always clean the gas-ket surface and use a new gasket. Wipe offany dirt from the threads and screw in the

spark plug to the correct torque.

NOTE:

If a torque-wrench is not available when youare fitting a spark plug, a good estimate ofthe correct torque is 1/4 to 1/2 a turn past fin-ger-tight. Have the spark plug adjusted to thecorrect torque as soon as possible with a

torque-wrench.

EMU28962

Checking fuel system

WARNING

EWM00060

Gasoline and its vapors are highly flam-mable and explosive. Keep away fromsparks, cigarettes, flames, or other

sources of ignition.

WARNING

EWM00910

Leaking fuel can result in fire or explo-sion.

�

Check for fuel leakage regularly.

�

If any fuel leakage is found, the fuelsystem must be repaired by a qualifiedmechanic. Improper repairs can make

the outboard unsafe to operate.

Check the fuel lines for leaks, crack, or mal-function. If a problem is found, your Yamahadealer or other qualified mechanic should re-pair it immediately.

Standard spark plug:BR7HS-10

1. Spark plug gap2. Spark plug I.D. mark (NGK)3. Spark plug part number

Spark plug gap:0.9–1.0 mm (0.035–0.039 in)

Spark plug torque:25.0 Nm (18.4 ft-lb) (2.55 kgf-m)©2019 Yam

aha Motor Corporation, U.S.A.

Maintenance

50

Checkpoints

�

Fuel system parts leakage

�

Fuel line joint leakage

�

Fuel line cracks or other damage

�

Fuel connector leakage

EMU28980

Inspecting fuel filter

WARNING

EWM00310

Gasoline is highly flammable, and its va-pors are flammable and explosive.

�

If you have any question about properlydoing this procedure, consult yourYamaha dealer.

�

Do not perform this procedure on a hotor running engine. Allow the engine tocool.

�

There will be fuel in the fuel filter. Keepaway from sparks, cigarettes, flames orother sources of ignition.

�

This procedure will allow some fuel tospill. Catch fuel in a rag. Wipe up anyspilled fuel immediately.

�

The fuel filter must be reassembledcarefully with the O-ring, filter cup, andhoses in place. Improper assembly orreplacement could result in a fuel leak,which could result in a fire or explosion

hazard.

EMU29001

Cleaning fuel filter

1. Remove the nut holding the fuel filter as-sembly if equipped.

2. Unscrew the filter cup, catching anyspilled fuel in a rag.

3. Remove the filter element, and wash it insolvent. Allow it to dry. Inspect the filterelement and O-ring to make sure theyare in good condition. Replace them ifnecessary. If any water is found in thefuel, the Yamaha portable fuel tank orother fuel tanks should be checked andcleaned.

ZMU03913

1. Nut

1. Filter cup2. Filter element3. Filter housing4. O-ring

1

ZMU03914

ZMU02079

1

4

23

©2019 Yamaha M


Maintenance

51

4. Reinstall the filter element in the cup.Make sure the O-ring is in position in thecup. Firmly screw the cup onto the filterhousing.

5. Attach the filter assembly to the bracketso that the fuel hoses are attached to thefilter assembly.

6. Run the engine and check the filter andlines for leaks.

EMU29041

Inspecting idling speed

WARNING

EWM00451

�


�



CAUTION:

ECM00490

This procedure must be performed whilethe outboard motor is in the water. Aflushing attachment or test tank can be

used.

A diagnostic tachometer should be used forthis procedure. Results may vary dependingon whether testing is conducted with theflushing attachment, in a test tank, or with theoutboard motor in the water.1. Start the engine and allow it to warm up

fully in neutral until it is running smooth-ly.

NOTE:

Correct idling speed inspection is only possi-ble if the engine is fully warmed up. If notwarmed up fully, the idle speed will measurehigher than normal. If you have difficulty ver-ifying the idle speed, or the idle speed re-quires adjustment, consult a Yamaha dealer

or other qualified mechanic.

2. Verify whether the idle speed is set tospecification. For idle speed specifica-tions, see page 40.

EMU29050

Checking water in engine oil tank

Oil injection models

There is a water trap at the bottom of the en-gine oil tank. If water or foreign matter is vis-ible in this trap, consult your Yamaha dealer.

EMU29112

Checking wiring and connectors

�

Check that each grounding wire is properlysecured.

�

Check that each connector is engaged se-curely.

EMU29120

Exhaust leakage

Start the engine and check that no exhaustleaks from the joints between the exhaust

1. Water trap2. Engine oil tank

21

ZMU01895

ZMU03915

©2019 Yamaha M


Maintenance

52

cover, cylinder head, and body cylinder.

EMU29130

Water leakage

Start the engine and check that no waterleaks from the joints between the exhaustcover, cylinder head, and body cylinder.

EMU29153

Checking power trim and tilt system

WARNING

EWM00430

�

Never get under the lower unit while itis tilted, even when the tilt support leveris locked. Severe injury could occur ifthe outboard motor accidentally falls.

�

Make sure no one is under the outboard

motor before performing this test.

1. Check the power trim and tilt unit for anysign of oil leaks.

2. Operate each of the power trim and tiltswitches on the remote control and en-gine bottom cowling (if equipped) tocheck that all switches work.

3. Tilt the outboard motor up and checkthat the tilt rod and trim rods are extend-ed completely.

4. Use the tilt support lever to lock the mo-tor in the up position. Operate the tiltdown switch briefly so the motor is sup-

ported by the tilt support lever.

5. Check that the tilt rod and trim rods arefree of corrosion or other flaws.

6. Activate the tilt-down switch until the trimrods have retracted completely into thecylinders.

7. Activate the trim-up switch until the tiltrod is fully extended. Unlock the tilt sup-port lever.

8. Tilt the outboard motor down. Checkthat the tilt rod and trim rods operate

1. Tilt rod2. Trim rods

ZMU03458

1

2

ZMU03432

ZMU04156

ZMU03460

©2019 Yamaha M


Maintenance

53

smoothly.

NOTE:

Consult your Yamaha dealer if any operation

is abnormal.

EMU29171

Checking propeller

WARNING

EWM00321

You could be seriously injured if the en-gine accidentally starts when you arenear the propeller.

�

Before inspecting, removing, or install-ing the propeller, remove the sparkplug caps from the spark plugs. Also,place the shift control in neutral, turnthe main switch to “ ” (off) and re-move the key, and remove the lanyardfrom the engine stop switch. Turn offthe battery cut-off switch if your boathas one.

�

Do not use your hand to hold the pro-peller when loosening or tightening thepropeller nut. Put a wood block be-tween the anti-cavitation plate and thepropeller to prevent the propeller from

turning.

Checkpoints

�

Check each of the propeller blades forwear, erosion from cavitation or ventila-tion, or other damage.

�

Check the propeller shaft for damage.

�

Check the splines / shear pin for wear ordamage.

�

Check for fish line tangled around the pro-peller shaft.

�

Check the propeller shaft oil seal for dam-age.

NOTE:

If the shear pin equipped: it is designed tobreak if the propeller hits a hard underwaterobstacle to help protect the propeller anddrive mechanism. The propeller will thenspin freely on the shaft. If this happens, the

shear pin must be replaced.

ZMU01896

ZMU01897

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Maintenance

54

EMU30660

Removing the propeller

EMU29194

Spline models

1. Straighten the cotter pin and pull it outusing a pair of pliers.

2. Remove the propeller nut, washer, andspacer (if equipped).

3. Remove the propeller and thrust wash-er.

EMU30670

Installing the Propeller

EMU29231

Spline models

CAUTION:

ECM00340

�

Be sure to install the thrust washer be-fore installing the propeller, otherwisethe lower case and propeller bosscould be damaged.

�

Be sure to use a new cotter pin andbend the ends over securely. Otherwisethe propeller could come off during op-

eration and be lost.

1. Apply Yamaha marine grease or a cor-

rosion resistant grease to the propellershaft.

2. Install the spacer (if equipped), thrustwasher, and propeller on the propellershaft.

3. Install the spacer (if equipped) and thewasher. Tighten the propeller nut to thespecified torque.

4. Align the propeller nut with the propellershaft hole. Insert a new cotter pin in thehole and bend the cotter pin ends.

NOTE:

If the propeller nut does not align with thepropeller shaft hole after tightening to thespecified torque, tighten the nut further to

align it with the hole.

EMU29282

Changing gear oil

WARNING

EWM00800

�

Be sure the outboard motor is securelyfastened to the transom or a stablestand. You could be severely injured ifthe outboard motor falls on you.

�

Never get under the lower unit while itis tilted, even when the tilt support leveror knob is locked. Severe injury couldoccur if the outboard motor accidental-

ly falls.

1. Tilt the outboard motor so that the gear

1. Cotter pin2. Propeller nut3. Washer4. Spacer5. Propeller6. Thrust washer

©2019 Yamaha M


Maintenance

55

oil drain screw is at the lowest point pos-sible.

2. Place a suitable container under thegear case.

3. Remove the gear oil drain screw andgasket.

NOTE:

�

If a magnetic gear oil drain screw isequipped, remove all metal particles fromthe screw before installing it.

�

Always use new gaskets. Do not reuse the

removed gaskets.

4. Remove the oil level plug and gasket toallow the oil to drain completely.

CAUTION:

ECM00710

Inspect the used oil after it has beendrained. If the oil is milky, water is gettinginto the gear case which can cause geardamage. Consult a Yamaha dealer for re-

pair of the lower unit seals.

NOTE:

For disposal of used oil, consult your

Yamaha dealer.

5. With the outboard motor in a vertical po-sition, and using a flexible or pressur-

ized filling device, inject the gear oil intothe gear oil drain screw hole.

6. Put a new gasket on the oil level plug.When the oil begins to flow out of the oillevel plug hole, insert and tighten the oillevel plug.

7. Put a new gasket on the gear oil drainscrew. Insert and tighten the gear oildrain screw.

EMU29312

Inspecting and replacing anode(s)

Yamaha outboard motors are protected fromcorrosion by sacrificial anodes. Inspect theexternal anodes periodically. Remove scalesfrom the surfaces of the anodes. Consult aYamaha dealer for replacement of externalanodes.

CAUTION:

ECM00720

Do not paint anodes, as this would render

them ineffective.

NOTE:

Inspect ground leads attached to externalanodes on equipped models. Consult a

1. Gear oil drain screw2. Oil level plug

1

2

ZMU01899

Recommended gear oil:Hypoid gear oil SAE#90

Gear oil quantity:980.0 cm

3

(33.13 US oz) (34.56 Imp.oz)

ZMU01900

©2019 Yamaha M


Maintenance

56

Yamaha dealer for inspection and replace-ment of internal anodes attached to the pow-

er unit.

EMU29320

Checking battery (for electric start models)

WARNING

EWM00330

Battery electrolytic fluid is dangerous; itcontains sulfuric acid and therefore ispoisonous and highly caustic.Always follow these preventive mea-sures:

�

Avoid bodily contact with electrolyticfluid as it can cause severe burns orpermanent eye injury.

�

Wear protective eye gear when han-

dling or working near batteries.Antidote (EXTERNAL):

�

SKIN - Flush with water.

�

EYES - Flush with water for 15 minutesand get immediate medical attention.

Antidote (INTERNAL):

�

Drink large quantities of water or milkfollowed by milk of magnesia, beatenegg, or vegetable oil. Get immediatemedical attention.

Batteries also generate explosive hydro-gen gas; therefore, you should alwaysfollow these preventive measures:

�

Charge batteries in a well-ventilated ar-ea.

�

Keep batteries away from fire, sparks,or open flames (for example: weldingequipment, lighted cigarettes, and soon.)

�

DO NOT SMOKE when charging or han-dling batteries.

KEEP BATTERIES AND ELECTROLYTIC

FLUID OUT OF REACH OF CHILDREN.

CAUTION:

ECM00360

�

A poorly maintained battery will quicklydeteriorate.

�

Ordinary tap water contains mineralsharmful to a battery, and should not be

used for topping up.

1. Check the electrolyte level at least oncea month. Fill to the manufacturer’s rec-ommended level when necessary. Topup only with distilled water (or pure de-ionized water suitable to use in batter-ies).

ZMU01901

ZMU03461

©2019 Yamaha M


Maintenance

57

2. Always keep the battery in a good stateof charge. Installing a voltmeter will helpyou monitor your battery. If you will notuse the boat for a month or more, re-move the battery from the boat and storeit in a cool, dark place. Completely re-charge the battery before using it.

3. If the battery will be stored for longerthan a month, check the specific gravityof the fluid at least once a month and re-charge the battery when it is low.

NOTE:

Consult a Yamaha dealer when charging or

re-charging batteries.

EMU29341

Connecting the battery

WARNING

EWM00570

Mount the battery holder securely in adry, well-ventilated, vibration-free loca-tion in the boat. Install a fully charged bat-

tery in the holder.

CAUTION:

ECM01121

�

Make sure the main switch (on applica-ble models) is “ ” (off) before work-ing on the battery.

�

Reversal of the battery cables will dam-age the electrical parts.

�

Connect the red battery cable first

when installing the battery and discon-nect the black battery cable first whenremoving it. Otherwise, the electricalparts can be damaged.

�

The electrical contacts of the batteryand cables must be clean and properlyconnected, or the battery will not start

the engine.

Connect the RED cable to the POSITIVE (+)terminal first. Then connect the BLACK ca-ble to the NEGATIVE (-) terminal.

Using a single battery

Connect both red cables to the (+) terminal.

WARNING

EWM00590

Do not leave cable unconnected. If it acci-dentally contacts the NEGATIVE (-) termi-nal of the battery, there will be a shortcircuit. Electric system damage and a fire

could result.

Using an accessory battery

Use a connecting cable between the (-) ter-minals of the starting battery and accessorybattery. See the illustrations of the wiringconnections. This cable must be made from

1. Red cable2. Black cable3. Battery

©2019 Yamaha M


Maintenance

58

wire equivalent to the starting battery cable.

WARNING

EWM00600

Use of smaller wire could lead to a fire.

NOTE:

Consult your Yamaha dealer about correct

wiring if a battery selector switch is desired.

EMU29370

Disconnecting the battery

Disconnect the BLACK cable from the NEG-ATIVE (-) terminal first. Then disconnect theRED cable from the POSITIVE (+) terminal.

EMU29390

Checking top cowling

Check the fitting of the top cowling by push-ing it with both hands. If it is loose have it re-paired by your Yamaha dealer.

EMU29400

Coating the boat bottom

A clean hull improves boat performance. Theboat bottom should be kept as clean of ma-rine growth as possible. If necessary, theboat bottom can be coated with an anti-foul-ing paint approved for your area to inhibitmarine growth.Do not use anti-fouling paint which includescopper or graphite. These paints can causemore rapid engine corrosion.

1. Battery for accessories2. Battery for starting3. Large black lead4. Large red lead for starting battery5. Negative connecting cable6. Power for accessories7. Small red lead for accessory battery charg-ing (optional part)

7

ZMU01942

4 3 5

16

2 ZMU04679

ZMU01943

©2019 Yamaha M


59

Trouble Recovery

EMU29424

Troubleshooting

A problem in the fuel, compression, or igni-tion systems can cause poor starting, loss ofpower, or other problems. This section de-scribes basic checks and possible remedies,and covers all Yamaha outboard motors.Therefore some items may not apply to yourmodel.If your outboard motor requires repair, bringit to your Yamaha dealer.If the engine trouble warning indicator isflashing, consult your Yamaha dealer.

Starter will not operate.

Q. Is battery capacity weak or low?A. Check battery condition. Use battery ofrecommended capacity.

Q. Are battery connections loose or corrod-ed?A. Tighten battery cables and clean batteryterminals.

Q. Is fuse for electric start relay or electric cir-cuit blown?A. Check for cause of electric overload andrepair. Replace fuse with one of correct am-perage.

Q. Are starter components faulty?A. Have serviced by a Yamaha dealer.

Q. Is shift lever in gear?A. Shift to neutral.

Engine will not start (starter operates).

Q. Is fuel tank empty?A. Fill tank with clean, fresh fuel.

Q. Is fuel contaminated or stale?

A. Fill tank with clean, fresh fuel.

Q. Is fuel filter clogged?A. Clean or replace filter.

Q. Is starting procedure incorrect?A. See page 30.

Q. Has fuel pump malfunctioned?A. Have serviced by a Yamaha dealer.

Q. Are spark plug(s) fouled or of incorrecttype?A. Inspect spark plug(s). Clean or replacewith recommended type.

Q. Are spark plug cap(s) fitted incorrectly?A. Check and re-fit cap(s).

Q. Is ignition wiring damaged or poorly con-nected?A. Check wires for wear or breaks. Tightenall loose connections. Replace worn or bro-ken wires.

Q. Are ignition parts faulty?A. Have serviced by a Yamaha dealer.

Q. Is engine stop switch lanyard not at-tached?A. Attach lanyard.

Q. Are engine inner parts damaged?A. Have serviced by a Yamaha dealer.

Engine idles irregularly or stalls.


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Trouble Recovery

60

Q. Is fuel system obstructed?A. Check for pinched or kinked fuel line orother obstructions in fuel system.

Q. Is fuel contaminated or stale?A. Fill tank with clean, fresh fuel.


Q. Have ignition parts failed?A. Have serviced by a Yamaha dealer.

Q. Has warning system activated?A. Find and correct cause of warning.

Q. Is spark plug gap incorrect?A. Inspect and adjust as specified.


Q. Is specified engine oil not being used?A. Check and replace oil as specified.

Q. Is thermostat faulty or clogged?A. Have serviced by a Yamaha dealer.

Q. Are carburetor adjustments incorrect?A. Have serviced by a Yamaha dealer.

Q. Is fuel pump damaged?A. Have serviced by a Yamaha dealer.

Q. Is air vent screw on fuel tank closed?A. Open air vent screw.

Q. Is choke knob pulled out?

A. Return to home position.

Q. Is motor angle too high?A. Return to normal operating position. Q. Is carburetor clogged?A. Have serviced by a Yamaha dealer.

Q. Is fuel joint connection incorrect?A. Connect correctly.

Q. Is throttle valve adjustment incorrect?A. Have serviced by a Yamaha dealer.

Q. Is battery cable disconnected?A. Connect securely.

Warning buzzer sounds or indicatorlights.

Q. Is cooling system clogged?A. Check water intake for restriction.

Q. Is engine oil level low?A. Fill oil tank with specified engine oil.

Q. Is heat range of spark plug incorrect?A. Inspect spark plug and replace it with rec-ommended type.

Q. Is specified engine oil not being used?A. Check and replace oil with specified type.

Q. Is engine oil contaminated or deteriorat-ed?A. Replace oil with fresh, specified type.

Q. Is oil filter clogged?A. Have serviced by a Yamaha dealer.

Q. Has oil feed/injection pump malfunc-tioned?

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Trouble Recovery

61

A. Have serviced by a Yamaha dealer.

Q. Is load on boat improperly distributed?A. Distribute load to place boat on an evenplane.

Q. Is water pump or thermostat faulty?A. Have serviced by a Yamaha dealer.

Q. Is there excess water in fuel filter cup?A. Drain filter cup.

Engine power loss.

Q. Is propeller damaged?A. Have propeller repaired or replaced.

Q. Is propeller pitch or diameter incorrect?A. Install correct propeller to operate out-board at its recommended speed (r/min)range.

Q. Is trim angle incorrect?A. Adjust trim angle to achieve most efficientoperation.

Q. Is motor mounted at incorrect height ontransom?A. Have motor adjusted to proper transomheight.

Q. Has warning system activated?A. Find and correct cause of warning.

Q. Is boat bottom fouled with marine growth?A. Clean boat bottom.


Q. Are weeds or other foreign matter tangledon gear housing?A. Remove foreign matter and clean lowerunit.

Q. Is fuel system obstructed?A. Check for pinched or kinked fuel line orother obstructions in fuel system.


Q. Is fuel contaminated or stale?A. Fill tank with clean, fresh fuel.

Q. Is spark plug gap incorrect?A. Inspect and adjust as specified.


Q. Have electrical parts failed?A. Have serviced by a Yamaha dealer.

Q. Is specified fuel not being used?A. Replace fuel with specified type.

Q. Is specified engine oil not being used?A. Check and replace oil with specified type.

Q. Is thermostat faulty or clogged?A. Have serviced by a Yamaha dealer.

Q. Is air vent screw closed?A. Open the air vent screw.

Q. Is fuel pump damaged?A. Have serviced by a Yamaha dealer.

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Trouble Recovery

62

Q. Is fuel joint connection incorrect?A. Connect correctly.

Q. Is heat range of spark plug incorrect?A. Inspect spark plug and replace it with rec-ommended type.

Q. Is high pressure fuel pump drive belt bro-ken?A. Have serviced by a Yamaha dealer.

Q. Is engine not responding properly to shiftlever position?A. Have serviced by a Yamaha dealer.

Engine vibrates excessively.

Q. Is propeller damaged?A. Have propeller repaired or replaced.

Q. Is propeller shaft damaged?A. Have serviced by a Yamaha dealer.

Q. Are weeds or other foreign matter tangledon propeller?A. Remove and clean propeller.

Q. Is motor mounting bolt loose?A. Tighten bolt.

Q. Is steering pivot loose or damaged?A. Tighten or have serviced by a Yamahadealer.

EMU29432

Temporary action in emergency

EMU29440

Impact damage

WARNING

EWM00870

The outboard motor can be seriously

damaged by a collision while operating ortrailering. Damage could make the out-

board motor unsafe to operate.

If the outboard motor hits an object in the wa-ter, follow the procedure below.

1. Stop the engine immediately.2. Inspect the control system and all com-

ponents for damage. Also inspect theboat for damage.

3. Whether damage is found or not, returnto the nearest harbor slowly and careful-ly.

4. Have a Yamaha dealer inspect the out-board motor before operating it again.

EMU29462

Replacing fuse

If the fuse has blown on an electric startmodel, open the fuse holder and replace thefuse with a new one of the proper amperage.

WARNING

EWM00630

Be sure to use the specified fuse. An in-correct fuse or a piece of wire could allowexcessive current flow. This could cause

electric system damage and a fire hazard.

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Trouble Recovery

63

NOTE:

Consult your Yamaha dealer if the new fuse

immediately blows again.

EMU29522

Power trim and tilt / power tilt will not operate

If the engine cannot be tilted up or down withthe power trim and tilt / the power tilt becauseof a discharged battery or a failure with thepower trim and tilt unit / the power tilt unit, theengine can be tilted manually.1. Loosen the manual valve screw by turn-

ing it counterclockwise until it stops.

2. Put the engine in the desired position,then tighten the manual valve screw by

turning it clockwise.

EMU29532

Starter will not operate

If the starter mechanism does not operate(the engine cannot be cranked with the start-er), the engine can be started with an emer-gency starter rope.

WARNING

EWM01021

�

Use this procedure only in an emergen-cy to return to the nearest port for re-pairs.

�

When the emergency starter rope isused to start the engine, the start-in-gear protection device does not oper-ate. Make sure the remote control leveris in neutral. Otherwise the boat couldunexpectedly start to move, whichcould result in an accident.

�

Attach the engine stop switch lanyardto a secure place on your clothing, oryour arm or leg while operating theboat.

�

Do not attach the lanyard to clothingthat could tear loose. Do not route thecord where it could become entangled,preventing it from functioning.

�

Avoid accidentally pulling the lanyardduring normal operation. Loss of en-gine power means the loss of moststeering control. Also, without enginepower, the boat could slow rapidly. Thiscould cause people and objects in theboat to be thrown forward.

�

Make sure no one is standing behindyou when pulling the starter rope. Itcould whip behind you and injuresomeone.

�

An unguarded, rotating flywheel is verydangerous. Keep loose clothing andother objects away when starting the

1. Fuse holder2. Fuse (20 A, 30 A)

1. Manual valve screw

1

2

ZMU03919

ZMU03464

1

©2019 Yamaha M


Trouble Recovery

64

engine. Use the emergency starter ropeonly as instructed. Do not touch the fly-wheel or other moving parts when theengine is running. Do not install thestarter mechanism or top cowling afterthe engine is running.

�

Do not touch the ignition coil, sparkplug wire, spark plug cap, or other elec-trical components when starting or op-erating the motor. You could get an

electrical shock.

EMU29561

Emergency starting engine

1. Remove the top cowling.2. Remove the start-in-gear protection ca-

ble from the starter, if equipped.3. Remove the starter/flywheel cover after

removing the bolt(s).

4. Prepare the engine for starting. For fur-ther information, see page 30. Be surethe engine is in neutral and that the en-gine stop switch lanyard lock plate is at-tached to the engine stop switch. Themain switch must be “ ” (on), ifequipped.

5. If equipped the choke knob, pull out itwhen the engine is cold. After the enginestarts, gradually return the choke knobto its home position as the engine warmsup.

6. Insert the knotted end of the emergencystarter rope into the notch in the flywheelrotor and wind the rope several turnsaround the flywheel clockwise.

ZMU03920

ZMU02334

ON STARTOFF

ZMU01906

ZMU03921

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Trouble Recovery

65

7. Give a strong pull straight out to crankand start the engine. Repeat if neces-sary.

EMU29670

Engine fails to operate

EMU29691

Ignition system malfunction

If the battery voltage is low or in the unlikelyevent of an ignition system malfunction, theengine speed may become erratic or the en-gine may stop. In such a situation, follow theprocedure below.1. Remove the CDI unit cover or electrical

cover, if equipped.

2. Disconnect the yellow cord (emergencycircuit) of the CDI unit to return to port.

WARNING

EWM00350

When the yellow cord is disconnected,the idle and low speeds are slightly high-er than normal. Use care when starting off

or stopping.

CAUTION:

ECM00380

Follow this procedure only in an emer-gency and just long enough to return to

port for repairs.

EMU29741

Low oil level warning activates

If the oil level is allowed to drop too low, thered segment will appear on the oil level indi-cator, the buzzer will sound, and enginespeed will be limited to about 2000 r/min. Ifthis happens, a reserve amount of oil can bepumped from the remote oil tank to the en-gine oil tank using the emergency switch.

WARNING

EWM01050

Be sure to stop the engine before per-

forming this procedure.

CAUTION:

ECM00900

�

If the emergency switch is held up toolong, too much oil will be pumped intothe engine oil tank, overflowing it. Re-lease the switch when oil reaches theupper level line on the engine oil tank.

�

Do not use this emergency procedure

ZMU03466

ZMU03923

1. CDI unit2. Yellow cord

1

2

ZMU03924

©2019 Yamaha M


Trouble Recovery

66

unless the oil level warning indicators

are working.

1. Remove the top cowling.2. Turn on the main switch.

3. Lift the emergency switch to pump re-serve oil into the engine oil tank from theremote oil tank.

4. After using the emergency switch, turnoff the main switch, then turn it back on.This resets the warning system to nor-mal operation. The yellow segment willcontinue to be displayed on the oil levelindicator.

5. Start the engine and return to the near-est port for more oil.

NOTE:

�

The maximum reserve oil capacity is 1500cm

3

(1.6 US qt, 1.31 Imp qt).

�

The oil-feed pump will not operate if theengine is tilted up more than 35°. Put theengine in the upright position (not tilted)

before using the emergency switch.

EMU29760

Treatment of submerged motor

If the outboard motor is submerged, immedi-ately take it to a Yamaha dealer. Otherwisesome corrosion may begin almost immedi-ately.If you cannot immediately take the outboardmotor to a Yamaha dealer, follow the proce-dure below in order to minimize engine dam-age.

EMU29771

Procedure

1. Thoroughly wash away mud, salt, sea-weed, and so on, with fresh water.

1. Emergency switch

1. Engine oil tank

ON STARTOFF

ZMU01906

1ZMU03925

1 2ZMU01908

2. Remote oil tank

ZMU01909

©2019 Yamaha M


Trouble Recovery

67

2. Remove the spark plugs and face thespark plug holes downward to allow anywater, mud, or contaminants to drain.

3. Drain the fuel from the carburetor, fuelfilter, and fuel line.

4. Feed fogging oil or engine oil throughthe carburetor(s) and spark plug holeswhile cranking with the manual starter oremergency starter rope.

5. Take the outboard motor to a Yamahadealer as soon as possible.

CAUTION:

ECM00400

Do not attempt to run the outboard motor

until it has been completely inspected.

ZMU01910

ZMU01911

©2019 Yamaha M


YAMAHA MOTOR CO., LTD.MADE IN JAPANPAYS D'ORIGINE JAPON

OUTBOARD MOTOR WARRANTY REGISTRATION

ENREGISTREMENT DE LA GARANTIE DU MOTEUR HORS-BORD

Please complete and mail this card. This information is necessary to accurately register your unit for warranty.Veuillez signer ci-dessous pour attester que le montage et l’inspection ont été faits dans le respect des directives d’inspection et

que la marche à suivre pour la garantie et l’entretien a été expliquée à l’acheteur au détail.

OUTBOARD MOTOR MODEL AND SERIAL NUMBER (From I.D. label on clamp bracket)MODÉLE ET NO. DE SÉRIE DU MOTEUR HORS-BORD (sur l’étiquette d’identification de la presse de fixation)

(For Dealer Use Only)(A l’usage du concessionnaire)YAMAHA DEALER NUMBERNO. DU CONCESSIONNAIRE YAMAHA

DEALER NAMENOM DU CONCESSIONNAIRE

DATE SOLDDATE DELIVRAISON

OWNER’S NAMENOM DUPROPRIÉTAIRE

ADDRESSADRESSE

PHONE NUMBER ( )NUMÉRO DE TÉLÉPHONE

USAGE(Check One)UTILISATION(En cocher un.)

PLEASURELOISIRCOMMERCIALCOMMERCIAL

MONTH DAY YEARMOIS JOUR ANNÉE

FIRST LASTPRÉNOM NOM DE FAMILLE

STREETRUE

CITY STATE/PROVINCE ZIPVILLE PROVINCE CODE POSTAL

Warranty card-04 2/17/03 2:41 PM Page 1©2019 Yamaha M


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