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Generator

LIT-19626-01-737CK-28199-12PRINTED ON RECYCLED PAPER

PRINTED IN JAPAN2011.05-0.3×1 !

(E)

EF6300iSDE

OWNER’S MANUAL

Read this manual carefully before operating this machine.

7CK-9-12 hyoshi 11.4.13 14:40

Read this manual carefully before operating this machine. This manualshould stay with this machine if it is sold.

7CK-9-12 hyoshi 11.4.13 14:40

INTRODUCTION

Congratulations on your purchase of your new Yamaha.This manual will provide you with a good basic understanding of the operation andmaintenance of this machine.If you have any questions regarding the operation or maintenance of your machine,please consult a Yamaha dealer.

EF6300iSDEOWNER’S MANUAL

© 2011 by Yamaha Motor Corporation, U.S.A.1st Edition, February 2011

All rights reserved. Any reprinting or unauthorized use without the written permission of

Yamaha Motor Corporation, U.S.A. is expressly prohibited.

Printed in JapanP/N LIT-19626-01-73

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Particularly important information is distin-guished in this manual by the followingnotations.

This is the safety alert symbol. It isused to alert you to potential personalinjury hazards. Obey all safety mes-sages that follow this symbol to avoidpossible injury or death.

A WARNING indicates a hazardous sit-uation which, if not avoided, couldresult in death or serious injury.

A NOTICE indicates special precau-tions that must be taken to avoid dam-age to the machine or other property.

TIPA TIP provides key information to makeprocedures easier or clearer.

NOTICE

WARNING

PLEASE READ AND UNDERSTANDTHIS MANUAL COMPLETELY BEFOREOPERATING THE MACHINE.

TIP9 Yamaha continually seeks advance-

ments in product design and quality.Therefore, while this manual containsthe most current product informationavailable at the time of printing, theremay be minor discrepancies betweenyour engine and this manual. If thereis any question concerning this manu-al, please consult a Yamaha dealer.

9 This manual should be considered apermanent part of this engine andshould remain with this engine whenresold.

* Product and specifications are subject tochange without notice.

WARNING

IMPORTANT MANUAL INFORMATION

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CONTENTS

SAFETY INFORMATION ........................1Exhaust fumes are poisonous ..............2Fuel is highly flammable and poisonous .............................................2Engine and muffler may be hot.............2Electric shock prevention......................3Connection notes..................................4Connection ...........................................4Extension cord notes ............................4

LOCATION OF IMPORTANT LABELS...................................................5DESCRIPTION ........................................7

Control panel ........................................7CONTROL FUNCTION............................8

Engine switch .......................................8Oil warning light (red) ...........................8AC protector .........................................9Economy control switch........................9G.F.C.I. receptacle .............................10Voltage select switch ..........................11Hour meter..........................................12Power meter .......................................12AC pilot light (green)...........................12Overload indicator light (red) ..............13Fuel tank cap ......................................13Fuel cock knob ...................................14Ground (earth) terminal ......................14Caster lock lever.................................14

PREPARATION.....................................15Fuel.....................................................15Engine oil............................................16Battery preparation .............................17

PRE-OPERATION CHECK ...................19Pre-operation check ...........................19

OPERATION..........................................20Starting the engine .............................20Stopping the engine............................22Connection .........................................23Application range................................25

PERIODIC MAINTENANCE ..................27Maintenance chart ..............................27Spark plug inspection .........................29

Carburetor adjustment........................31Engine oil replacement .......................31Air filter ...............................................32Muffler screen and spark arrester.......34Fuel tank filter .....................................36Battery ................................................37Recommended battery .......................37Fuse replacement...............................38G.F.C.I. receptacle test.......................39

STORAGE .............................................40Drain the fuel ......................................40Engine ................................................42Battery ................................................43

TROUBLESHOOTING ..........................44SPECIFICATIONS.................................47

Dimensions.........................................47Engine ................................................47Generator ...........................................47Battery ................................................47

CONSUMER INFORMATION................48Identification number records .............48Machine identification .........................48

EXHAUST EMISSION CONTROL SYSTEM AND COMPONENTS.............49WIRING DIAGRAM ...............................51YAMAHA MOTOR CORPORATION,U.S.A. EF SERIES GENERATORS 3-YEAR LIMITED WARRANTY ............53

YAMAHA OUTDOOR POWER EQUIPMENTCALIFORNIA EVAPORATIVE EMISSION CONTROL WARRANTY STATEMENT ..................56

YAMAHA MOTOR CORPORATION,U.S.A.SMALL OFF ROAD ENGINESCALIFORNIA EMISSION CONTROL WARRANTY.......................57

YAMAHA EXTENDED SERVICE (Y.E.S.)..................................................61

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SAFETY INFORMATION

9 This generator is not designed for on-board use.Do not use it while installed on the vehicle.

9 Do not modify the generator or use it with its partsremoved.

9 Do not allow children to operate the generator.

1

1 1

794-7CK

9 Be sure to carry the generator only by its carryinghandles.

1 Carrying handles (shaded)

7CH-002

9 Do not place any obstacles on the generator.

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Exhaust fumes are poisonous9 Never operate the engine in a closed area or it

may cause unconsciousness and death within ashort time. Operate the engine in a well ventilatedarea.

Engine and muffler may be hot9 Place the generator in a place where pedestrians

or children are not likely to touch the generator.

9 Avoid placing any flammable materials near theexhaust outlet during operation.

Fuel is highly flammable and poisonous9 Always turn off the engine when refuelling.

9 Never refuel while smoking or in the vicinity of anopen flame.

9 Take care not to spill any fuel on the engine ormuffler when refueling.

9 Do not leave the generator inside the vehicle or inthe trunk.

9 If you swallow any fuel, inhale fuel vapor, or allowany to get in your eye(s), see your doctor immedi-ately. If any fuel spills on your skin or clothing,immediately wash with soap and water andchange your clothes.

9 When operating or transporting the generator, besure it is kept upright. If it tilts, fuel may leak fromthe carburetor or fuel tank.

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a

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9 Keep the generator at least 1 m (3 ft) from build-ings or other equipment, or the engine may over-heat.

a 1 m (3 ft)

9 Do not operate the generator with a dust cover orother objects covering it.

9 When covering the generator, be sure to do soonly after the engine and muffler have completelycooled down.

Electric shock prevention9 Never operate the engine in rain or snow.

7

741-7XFh

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9 Never touch the generator with wet hands or elec-trical shock will occur.

9 Connect the ground lead of the generator to theground (earth) terminal and connect the end to theground electrode buried in the ground.

1 Ground (earth) terminal 1

763-7CKa

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1

2

1

2

741-7XFk

Connection notes9 Avoid connecting the generator to commercial

power outlet.

9 Avoid connecting the generator in parallel with anyother generator.

1 Correct2 Incorrect

Connection

Before the generator can be connected to a build-ing’s electrical system, a licensed electrician mustinstall an isolation (transfer) switch in the build-ing’s main fuse box. The switch is the connectionpoint for generator power and allows selection ofgenerator or main line power to the building. Thiswill prevent the generator from charging the mainpower line (backfeeding) when the main powersupply has failed or has been turned off for linerepair. Backfeeding can electrocute or injure linemaintenance personnel. Also, generator and build-ing electrical system damage can occur when nor-mal operating power returns if unit is used withoutan isolation switch.

WARNING

Extension cord notesExtension cords should be protected by a tough flexi-ble rubber sheath (IEC 245) or the equivalent to with-stand mechanical stresses.

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LOCATION OF IMPORTANT LABELS

Please read the following labels carefully before oper-ating this generator.TIPMaintain or replace safety and instruction labels, asnecessary.

1

2

4 673 5

1 2

HOT EXHAUST7WL-28176-10

OIL

EF6300iSDE

AC output 60Hz

Rated 5500VA

Phase SingleFuel Gasoline

YAMAHA MOTOR POWERED PRODUCTS CO.,LTD.MADE IN JAPAN

240V/120V

7CK-24164-10

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3

6

Read the owner's manual and all labels before operating.Only operate in well-ventilated areas .Exhaust gas contains poisonous carbon monoxide.Check for spilled fuel or fuel leaks.Stop engine before refueling.Do not Operate near flammable materials.Electrocution can occur if generator is used in rain, snow, or near water, keep this unit dry at all times .When operating the generator: Never place a partition or other barrier around the generator. Do not cover the generator with a box. Do not place any objects on the generator.

WARNINGq qAVERTISSEMENT

7CF-24162-20

Lisez le mode d'emploi et toutes les etiquettes avant de faire fonctionner la machine.Faites fonctionner uniquement dans des lieux bien aeres.Les gaz d'echappement contiennent du monoxyde de carbone.Verifiez si du carburant a ete renverse ou s'il fuit .Arretez le moteur avant de faire le plein de carburant.N'utilisez pas a proximite de materiaux inflammables.Il y a risque d'electrocution si le generateur fonctionne sous la pluie, dans la neige, ou pres de l'eau, gardez la machine ausec en toutes circonstances.Quand la génératrice est en marche: Ne jamais entourer la génératrice de cloisons ou d'écrans. Ne jamais recouvrir la génératrice d'une boîte. Ne jamais disposer d'objets sur la génératrice.

The air index of this engine is 3(California only)

MOST CLEAN LEAST CLEAN0 2 4 6 8 10

Note: The lower the air index, the less the pollution.This engine is certified to be emissions compliantfor the following use:

Check owner's manual for further details.( *** HOURS) ( *** HOURS) ( *** HOURS)MODERATE INTERMEDIATE EXTENDEDX

EMISSION CONTROL INFORMATIONYAMAHA MOTOR POWERED PRODUCTS CO.,LTD.

emission regulations for small off-road engines.This engine meets 20** California exhaust and evaporative

THIS ENGINE MEETS U.S. EPA EXH EVP REGS FOR 20**.

EVAP F: ********EF: ***********

EMISSION CONTROL SYSTEM: **DISPLACEMENT: *** cc

EMISSION COMPLIANCE PERIOD : *** HOURS

This engine is certified to operate on unleaded gasoline.

No other adjustments needed.ENGINE OIL: SAE***** TYPE : **

7

NOTICEUse the specified spark plug only.

Specified plug:BPR4ES(NGK)

4

DANGERUsing a generator indoors CAN KILL YOU IN MINUTES.

Generator exhaust contains carbon monoxide.This is a poison you cannot see or smell.

NEVER use inside a home or garage, EVEN IF doors and windows are open.

Only use OUTSIDE and far away from windows, door, and vents.

5

Electrocution or property damage can occur : Do not connect this generator to any building's electricalsystem unless an isolation switch has been installed by a licensed elec-trician. Refer to the owner's manual.

7XF-2415A-10

WARNINGq

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DESCRIPTION

1 Carrying handles (shaded)2 Fuel tank cap3 Fuel level gauge4 Muffler5 Caster lock lever 6 Oil filler cap7 Oil drain bolt8 Battery

Control panel1 Hour meter2 Power meter3 G.F.C.I. receptacle4 AC protector5 AC receptacle6 Engine switch7 Fuel cock knob8 Voltage select switch9 Ground (earth) terminal0 Economy control switchq Overload indicator lightw AC pilot lighte Oil warning light

8

7

6

1 3 4

90w qe

2 5

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3 121

1

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7 6 58

4

1

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700-7XF

Oil warning light (red)When the oil level falls below the lower level, the oilwarning light comes on and then the engine stopsautomatically. Unless you refill with oil, the engine willnot start again.

TIPIf the engine stalls or does not start, turn the engineswitch to “START”. If the oil warning light comes on,the engine oil is insufficient. Add oil and restart.

CONTROL FUNCTION

Engine switchThe engine switch controls the ignition system.

1 7 “ON”Ignition circuit is switched on.The engine can be started.

2 5 “STOP”Ignition circuit is switched off.The engine will not run.

3 6 “START”Starting circuit is switched on.The starter motor starts and the engine can be started.Take your hand off the switch immediately after theengine starts.

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1

42

3

793-7CKe

AC protectorProtectors are equipped for the G.F.C.I. receptacleand the AC receptacle.The AC protector 1 trips when total amount of theG.F.C.I. receptacles loads exceed 20A.The AC protector 3 trips when the AC receptacleloads exceed 30A.

1 AC protector 2 G.F.C.I. receptacles 3 AC protector 4 AC receptacle

Reduce the load to within specified the generatorrated output if the AC protector turns off. If theturns off again, consult a Yamaha dealer.

NOTICE

763-238a

1

2

Economy control switch

1 I “ON”When the economy control switch is turned to “ON”,the economy control unit controls the engine speedaccording to the connected load. The results are betterfuel consumption and less noise.

2 3 “OFF”When the economy control switch is turned to “OFF”,the engine runs at the rated r/min (3,400 r/min) regard-less of whether is a load connected or not.

ON OFF

1 2ECON.SW

763-124a

Press the switches to “Reset” the AC protectors.

1 “Reset”2 “OFF”

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TE

ST

RE

SE

T

RE

SE

T

TE

ST

w

q

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e

763-060

G.F.C.I. receptacle

TO REDUCE THE CHANCE OF ELECTRICALSHOCK:9 Do not attempt to operate electric devices if

the ground fault circuit interrupter reset buttonpops out repeatedly during use.

9 Test the ground fault circuit interrupter duringthe pre-operation checks according to themaintenance instructions on page 39.

9 Remember that only receptacle labeled “GFCI”have ground fault circuit interrupter protec-tion.

The G.F.C.I. (Ground Fault Circuit Interrupter) shutsoff power to the protected receptacles if a ground fault(electrical leak) is detected.If the reset button pops out, the electric devices con-nected into the receptacle may be faulty. If this hap-pens, check the electric devices carefully. If the elec-tric devices appears to be in good condition, press thereset button firmly until a click is heard. This willrestore power. If the reset button pops out again, dis-connect all the electric devices immediately. Have theelectric devices inspected and repaired by a qualifiedrepairperson before attempting to use them again.

1 G.F.C.I. (Ground Fault Circuit Interrupter) 2 Reset button 3 Pops out

WARNING

TIPThe economy control switch must be turned to “OFF”when using electric devices that require a large start-ing current, such as a compressor of a submersiblepump.

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Voltage select switch

Do not operate the voltage select switch while theengine is running.

1 120/240VWhen the voltage select switch is turned to“120/240V”, the generator supplies both 120V and240V.

2 120VWhen the voltage select switch is turned to “120V”, thegenerator supplies 120V only.

NOTICE

799-7CK

1 2NO SWITCHINGDURING OPERATION.

WHEN SWITCHING TO 120V.THE 120/240V OUTLETCANNOT BE USED.

120/240V 120V

TIPIf you operate the generator with the voltage selectswitch in the 120/240V-position, the electric currentwill be limited for the 120V-receptacles.When you use either receptacle 1 or 2 and recepta-cle 3 at the same time, the total electric current pro-vided will be equal to or even less than 22.9A.For example: If the 240V-receptacle provides 10A, the 120V-recep-tacles 1 and 2 can be used up to 12.9A each.In case the load exceeds 22.9A, the overload indicatorlight will turn on and the generator will stop. (At thismoment the segments of the power meter may notreach 10)If you operate the generator with the voltage selectswitch in the 120V-position, the receptacles 1 and 2can supply rated current (45.8A).

1 G.F.C.I. receptacle (120V) 2 AC receptacle (120V) 3 AC receptacle (120V/240V)

213

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Hour meterThe hour meter shows the total number of hours thegenerator has been run.

1 Hour meter

Power meterThe power meter shows the amount of electric currentused by a barmeter.The generator output is normal when the segments ofthe barmeter appear.

1 Power meter

TIPWhen 10 segments appear, the generator has almostreached its rated output.

AC pilot light (green)The AC pilot light comes on when the engine startsand produces power.

1 AC pilot light

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Overload indicator light (red)The overload indicator light comes on when an over-load of a connected electrical device is detected, theinverter control unit overheats, or the AC output volt-age rises. Then, the AC protector will trip, stoppingpower generation in order to protect the generator andany connected electric devices. The AC pilot light(green) will go off and the overload indicator light (red)will stay on, but the engine will not stop running.

1 Overload indicator light

When the overload indicator light comes on and powergeneration stops, proceed as follows:1. Turn off any connected electric devices and stop

the engine.

2. Reduce the total wattage of connected electricdevices within the rated output.

3. Check for blockages in the cooling air inlet andaround the control unit. If any blockages arefound, remove them.

4. After checking, restart the engine.

TIPThe overload indicator light may come on for a fewseconds at first when using electric devices thatrequire a large starting current, such as a compressoror a submersible pump. However, this is not a mal-function.

1

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707-7XFb

Fuel tank capRemove the fuel tank cap by turning it counterclock-wise.

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1

ON

OFF

2

3

705-073d

1

763-7CKa

Fuel cock knobThe fuel cock supplies fuel from the fuel tank to thecarburetor.The fuel cock has two positions.

1 Fuel cock knob

2 “ON”With the knob in this position, fuel flows to the carbure-tor. Normal using is done with the knob in this position.

3 “OFF”With the knob in this position, fuel will not flow. Alwaysturn the knob to this position when the engine is notrunning.

Ground (earth) terminalGround (earth) terminal connects the earth line for pre-vention of electric shock.When the electric device is grounded, be sure toground the generator also.

1 Ground (earth) terminal

1

2

788-7CKh

Caster lock leverThe caster lock lever stops moving the generator.

1 “Release”2 “Lock”

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PREPARATION

Fuel

9 Fuel is highly flammable and poisonous.Check “SAFETY INFORMATION” (See page 2)carefully before filling.

9 Do not overfill the fuel tank, otherwise it mayoverflow when the fuel warms up andexpands.

9 After fill the fuel, make sure the fuel tank cap istightened securely.

9 Immediately wipe off spilled fuel with a clean,dry, soft cloth, since fuel may deterioratepainted surfaces or plastic parts.

9 Use only unleaded gasoline. The use of leadedgasoline will cause severe damage to internalengine parts.

Make sure there is sufficient fuel in the tank.When refueling, be sure to fill the tank to the bottomedge of the fuel filter.

1 Fuel level gauge2 Red line

3 Fuel level4 Fuel filter

NOTICE

WARNING

Recommended fuel: Unleaded gasoline

Fuel tank capacity:Total:

17.0 L (4.49 US gal, 3.74 Imp gal)

“F” FullRed line 2 Empty

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r

700-006

Engine oil

The generator has been shipped without engineoil. Do not start the engine until you have filled itwith the sufficient engine oil.

1. Place the generator on a level surface.

2. Remove the screws, and then pull outward on theareas of rear cover shown.

1 Screws 2 Rear cover

3. Remove the oil filler cap.

3 Oil filler cap

NOTICE

1

2

788-7CKb

4. Fill the specified amount of the recommendedengine oil, and then install and tighten the oil fillercap.

4 Upper level

Your Yamaha engine has been designed to use regu-lar unleaded gasoline with a pump octane number ((R+ M)/2) of 86 or higher, or research octane number of91 or higher.

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Battery preparation(See page 37)

9 Electrolyte is poisonous and dangerous sinceit contains sulfuric acid, which causes severeburns. Avoid any contact with skin, eyes orclothing and always shield your eyes whenworking near batteries. In case of contact,administer the following FIRST AID.9 EXTERNAL: Flush with plenty of water.9 INTERNAL: Drink large quantities of water or

milk and immediately call a physician.9 EYES: Flush with water for 15 minutes and

seek prompt medical attention.9 Batteries produce explosive hydrogen gas.

Therefore, keep sparks, flames, cigarettes,etc., away from the battery and provide suffi-cient ventilation when charging it in anenclosed space.

9 KEEP THIS AND ALL BATTERIES OUT OF THEREACH OF CHILDREN.

WARNING

762-012

0°C

å YAMALUBE 4 (10W-40)

∂ SAE 10W ç SAE #20 ∫ SAE #30

32°F

25°C

80°F

Recommended engine oil:åYAMALUBE 4 (10W-40),

SAE 10W-30 or 10W-40∫SAE #30çSAE #20∂SAE 10W

Recommended engine oil grade:API Service SE type or higher

Engine oil quantity:1.3 L (1.37 US qt, 1.14 lmp qt)

5. Install the rear cover and tighten the screws.


1 Screws2 Rear cover

1

2

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8. Connect the negative lead (black) to the negative(–) battery terminal.

8 Negative lead (black) 9 Negative (–) battery terminal


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5. Connect the positive lead (red) to the positive (+)battery terminal.

6 Positive lead (red) 7 Positive (+) battery terminal

6. Install the battery onto the tray.

7. Install the battery plate and tighten the wing nuts.

2. Remove the wing nuts and battery plate.

3 Wing nuts 4 Battery plate

3. Remove the battery.

5 Battery

4. Fill the battery with the electrolyte.Refer to the instruction sheet included with theelectrolyte for filling instructions.

3

5

4

762-7XFa

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PRE-OPERATION CHECK

If any item in the Pre-operation check is not work-ing properly, have it inspected and repaired beforeoperating the generator.

The condition of a generator is the owner's responsibil-ity. Vital components can start to deteriorate quicklyand unexpectedly, even if the generator is unused.

TIPPre-operation checks should be made each time thegenerator is used.

Pre-operation checkFuel (See page 15)9 Check fuel level in fuel tank.9 Refuel if necessary.

Fuel line9 Check fuel hose for crack or damage.9 Replace if necessary.

Engine oil (See page 16)9 Check oil level in engine.9 If necessary, add recommended oil to specified

level.9 Check generator for oil leakage.

The point where abnormality was recognized byuse9 Check operation.9 If necessary, consult a Yamaha dealer.

WARNING

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705-073

ON

OFF

q

OPERATION

9 Never operate the engine in a closed area or itmay cause unconsciousness and death withina short time. Operate the engine in a well ven-tilated area.

9 Before starting the engine, do not connect anyelectric devices.

9 Clean dusts, dirt or water off the receptaclebefore use.

The generator has been shipped without engineoil. Do not start the engine until you have filled itwith the sufficient engine oil.

NOTICE

WARNING

Starting the engine1. Turn the economy control switch to “OFF”.

1 3 “OFF”

763-124b

ON OFF

1ECON.SW

799-7CK



120/240V 120V

3. Turn the fuel cock knob to “ON”.

1 “ON”

2. Select the voltage select switch position accordingto the operating voltage of the electric device.

1 120/240V2 120V

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q

5. Turn the engine switch to “START”.Take your hand off the switch immediately afterthe engine starts.

1 6 “START”

If the engine fails to start, release the switch, waita few seconds, then try again. Each attemptshould be as short as possible to preserve the bat-tery. Do not crank the engine more than 5 secondson any one attempt.

NOTICE

4. Turn the engine switch to “ON”.

1 7 “ON”

763-127h

1

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ON

OFFq

3. Turn the fuel cock knob to “OFF”.

1 “OFF”

Stopping the engineTIPTurn off any electric devices.

1. Disconnect any electric devices.

2. Turn the engine switch to “STOP”.

1 5 “STOP”

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2. Start the engine.

3. Plug in to AC receptacle.

TIPTo supply both 120V and 240V power sources fromthe 4-blade plug receptacle needs special knowledgeof the wiring plug. Please contact a trained electricianfor the wiring of the plugs.

ConnectionAlternating Current (AC)

Be sure any electric devices are turned off beforeplugging them in.

9 Be sure all electric devices including the linesand plug connections are in good conditionbefore connection to the generator.

9 Be sure the total load is within generator ratedoutput.

9 Be sure the receptacle load current is withinreceptacle rated current.

9 Do not operate the voltage select switch whilethe engine is running.

TIPMake sure to ground (earth) the generator.When the electric device is grounded, be sure toground the generator also.

1. Select the voltage select switch position accordingto the operating voltage of the electric device.

1 120/240V2 120V

NOTICE

WARNING

761-7CKa

799-7CK



120/240V 120V

779-017a

YW

XG

120V

120V240V

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ON OFF

1ECON.SW

4. Make sure the AC pilot light is on.

1 AC pilot light

5. Turn the economy control switch to “ON”

1 I “ON”

6. Turn on any electric devises.TIPThe economy control switch must be turned to “OFF”to increase engine speed to rated r/min.

1

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Application rangeWhen using the generator, make sure the total load is within rated output of a generator.Otherwise, generator damage may occur.

AC

Power factor 1 0.8 – 0.950.4 – 0.75

(Efficiency 0.85)

EF6300iSDE – 5,500W – 4,400W – 1,870W

TIP9 “–” means below.9 Application wattage indicates when each device is

used by itself.9 The overload indicator light comes on when total

wattage exceeds the application range. (See page13 for more details.)

1 Overload indicator light

9 Do not overload. The total load of all electrical appliances must not exceedthe supply range of the generator. Overloading will damage the generator.

9 When supplying precision equipment, electronic controllers, PCs, electroniccomputers, microcomputer-based equipment or battery chargers, keep thegenerator a sufficient distance away to prevent electrical interference fromthe engine. Also ensure that electrical noise from the engine does not inter-fere with any other electrical devices located near the generator.

9 If the generator is to supply medical equipment, advice should first beobtained from the manufacturer, a medical professional or hospital.

9 Some electrical appliances or general-purpose electric motors have highstarting currents, and cannot therefore be used, even if they lie within thesupply ranges given in the above table. Consult the equipment manufacturerfor further advice.

NOTICE

1

763-7CKd

7CK-28199-12_a 11.3.21 13:17 Page 25

– 26 –

— MEMO —

7CK-28199-12_a 11.3.21 13:17 Page 26

– 27 –

PERIODIC MAINTENANCE

Safety is an obligation of the owner. Periodic inspection, adjustment and lubrication willkeep your generator in the safest and most efficient condition possible. The most impor-tant points of generator inspection, adjustment, and lubrication are explained on the fol-lowing pages.

If you are not familiar with maintenance work, have a Yamaha dealer do it for you.

Maintenance chart

Stop the engine before starting maintenance work.

Use only Yamaha specified genuine parts for replacement. Ask an authorizedYamaha dealer for further information.

NOTICE

WARNING

WARNING

Item RoutinePre-

operationcheck

Every

6 months or 100 Hr

12 monthsor 300 Hr

Spark plug• Check condition.

1• Clean and replace if necessary.

Fuel • Check fuel level and leakage. 1

Fuel hose • Check fuel hose for cracks or damage.1

• Replace if necessary.

Engine oil• Check oil level in engine. 1

• Replace. 1(*1)

Air filter element• Check condition.

1(*2)• Clean.

Muffler screen• Check condition.


Spark arrester• Check condition.


Fuel filter • Clean and replace if necessary. 1

7CK-28199-12_a 11.3.21 13:17 Page 27

– 28 –

*1····· Initial replacement of the engine oil is after one month or 20 hours of operation.*2·····The air filter element needs to be cleaned more frequently when using in unusually wet or dusty areas.�····· Since these items require special tools, data and technical skills, have a Yamaha dealer perform the ser-

vice.

Item RoutinePre-

operationcheck

Every

6 months or 100 Hr

12 monthsor 300 Hr

Crankcase breather • Check breather hose for cracks or

hosedamage. 1

• Replace if necessary.

Cylinder head• Decarbonize cylinder head.

�• More frequently if necessary.

Valve clearance • Check and adjust when engine is cold. �

Fittings / fasteners• Check all fittings and fasteners.

�• Correct if necessary.

The point where abnormality was recognized by use. 1

7CK-28199-12_a 11.3.21 13:17 Page 28

4. Check the spark plug type and gap.

a Gap

TIPThe spark plug gap should be measured with a wirethickness gauge and, if necessary, adjusted to specifi-cation.

2. Remove the spark plug cap and then remove thespark plug.

3. Check for discoloration and remove the carbon.The porcelain insulator around the center elec-trode of spark plug should be a medium-to-lighttan color.

– 29 –

760-7XF

a

760-001a

Spark plug inspectionThe spark plug is an important engine component,which should be checked periodically.

1. Remove the screws, and then pull outward on theareas of front cover shown.

1 Screws2 Front cover

Standard spark plug:BPR4ES (NGK)

Spark plug gap:0.7–0.8 mm (0.028–0.031 in)

1

2

788-7CKa

7CK-28199-12_b 11.3.21 13:47 Page 29

– 30 –

5. Install the spark plug.

TIPIf a torque wrench is not available when installing aspark plug, a good estimate of the correct torque is1/4-1/2 turn past finger tight. However, the spark plugshould be tightened to the specified torque as soon aspossible.

6. Install the spark plug cap.

7. Install the front cover and tighten the screws.

Spark plug torque:20 Nm (2.0 m·kgf, 14 ft·lbf)

7CK-28199-12_b 11.3.21 13:47 Page 30

1. Place the generator on a level surface and warmup the engine for several minutes.Then stop the engine.



3. Remove the rubber cap, rubber plug and the oilfiller cap.

3 Rubber cap 4 Rubber plug 5 Oil filler cap 6 Oil drain bolt 7 Gasket 8 O-ring

4. Place an oil pan under the engine. Remove the oildrain bolt so that the oil can be completelydrained.

5. Check the oil drain bolt, gasket, oil filler cap andO-ring. Replace them if damaged.

– 31 –

3

5

67

8

4 700-7XFb

1

2

788-7CKb

Engine oil replacement

Avoid draining the engine oil immediately afterstopping the engine. The oil is hot and should behandled with care to avoid burns.

WARNING

Carburetor adjustmentThe carburetor is a vital part of the engine. Adjustingshould be left to a Yamaha dealer with the profession-al knowledge, specialized data, and equipment to doso properly.

7CK-28199-12_b 11.3.21 13:47 Page 31

– 32 –

Air filter1. Remove the screws, and then pull outward on the

areas of front cover shown.


2. Remove the screws.

3 Screws

1

2

788-7CKa

3

3

788-7XFi

6. Install the oil drain bolt.

7. Add engine oil to the upper level.

1 Upper level

Be sure no foreign material enters the crankcase.

8. Install the oil filler cap, the rubber cap and the rub-ber plug.


NOTICE

700-006a

q

Recommended engine oil:åYAMALUBE 4 (10W-40),

SAE 10W-30 or 10W-40∫SAE #30çSAE #20∂SAE 10W

Recommended engine oil grade:API Service SE type or higher

Engine oil quantity:1.3 L (1.37 US qt, 1.14 lmp qt)

0°C

å YAMALUBE 4 (10W-40)

∂ SAE 10W ç SAE #20 ∫ SAE #30

32°F

25°C

80°F

Oil drain bolt torque:30 Nm (3.0 m·kgf, 22 ft·lbf)

7CK-28199-12_b 11.3.21 13:47 Page 32

– 33 –

3. Remove the air filter case cover and foam ele-ment.

1 Air filter case cover 2 Foam element

4. Wash the foam element in solvent and dry it.

Never use the solvent while smoking or in thevicinity of an open flame.

5. Oil the foam element and squeeze out excess oil.The foam element should be wet but not dripping.

Do not wring out the foam element when squeez-ing it. This could cause it to tear.

6. Insert the foam element into the air filter case.

The engine should never run without the foam ele-ment; excessive piston and cylinder wear mayresult.

TIPBe sure the foam element sealing surface matches theair filter so there is no air leak.

7. Install the air filter case cover and tighten thescrews.


NOTICE

NOTICE

WARNING

Recommended oil:Foam-air-filter oil or SAE #20 motor oil

710-037a

1 2

7CK-28199-12_b 11.3.21 13:47 Page 33

– 34 –

741-7XFl

1

2

788-7CKb

1

2

3

711-7XFa

711-7XFb

4 711-7XFc

Muffler screen and spark arrester

The engine and muffler will be very hot after theengine has been run.Avoid touching the engine and muffler while theyare still hot with any part of your body or clothingduring inspection or repair.

WARNING

2. Loosen the bolt and then remove the muffler cap,the muffler screen and spark arrester.

1 Bolt2 Muffler cap 3 Muffler screen 4 Spark arrester



7CK-28199-12_b 11.3.21 13:47 Page 34

– 35 –

2

1

711-7XFd

711-7XFe

6. Install the muffler screen and the muffler cap, thentighten the bolt.


3. Remove the carbon deposits on the mufflerscreen and spark arrester using a wire brush.

When cleaning, use the wire brush lightly to avoiddamaging or scratching of the muffler screen andspark arrester.

4. Check the muffler screen and spark arrester.Replace them if damaged.

5. Install the spark arrester.

TIPAlign the spark arrester lump to the hole in the mufflerpipe.

1 Spark arrester lump 2 Hole

NOTICE

711-075

7CK-28199-12_b 11.3.21 13:47 Page 35

– 36 –

707-043b

q

Fuel tank filter

Never use the gasoline while smoking or in thevicinity of an open flame.

1. Remove the fuel tank cap and fuel filter.

1 Fuel filter

2. Clean the fuel filter with gasoline.Replace it if damaged.

3. Wipe the fuel filter and install it.

4. Install the fuel tank cap.

Be sure the fuel tank cap is tightened securely.

WARNING

WARNING

7CK-28199-12_b 11.3.21 13:47 Page 36

Recommended battery

Recommended battery:Capacity: 12V/18Ah

– 37 –

762-012

BatteryThis generator is equipped with a VRLA (ValveRegulated Lead Acid) battery. There is no need tocheck the electrolyte or to add distilled water.

9 Electrolyte is poisonous and dangerous sinceit contains sulfuric acid, which causes severeburns. Avoid any contact with skin, eyes orclothing and always shield your eyes whenworking near batteries. In case of contact,administer the following FIRST AID.9 EXTERNAL: Flush with plenty of water.9 INTERNAL: Drink large quantities of water or

milk and immediately call a physician.9 EYES: Flush with water for 15 minutes and

seek prompt medical attention.9 Batteries produce explosive hydrogen gas.

Therefore, keep sparks, flames, cigarettes,etc., away from the battery and provide suffi-cient ventilation when charging it in anenclosed space.

9 KEEP THIS AND ALL BATTERIES OUT OF THEREACH OF CHILDREN.

To charge the batteryHave a Yamaha dealer charge the battery as soon aspossible if it seems to have discharged.

To charge a VRLA battery, a special (constant-volt-age) battery charger is required. Using a conven-tional battery charger will damage the battery. Ifyou do not have access to a constant-voltage bat-tery charger, have a Yamaha dealer charge yourbattery.

NOTICE

WARNING

7CK-28199-12_b 11.3.21 13:47 Page 37

2. Replace the fuse with one of proper amperage.

TIPIf the fuse immediately blows again, consult a Yamahadealer.


– 38 –

1

2

788-7CKa

779-7XF

Fuse replacement

Be sure to use specified fuse. A wrong fuse willcause electrical system damage and A FIRE HAZ-ARD.

Be sure the engine switch is turned to “STOP” toprevent accidental short circuiting.

NOTICE

WARNING

Specified fuse: 20A



7CK-28199-12_b 11.3.21 13:47 Page 38

– 39 –

TE

ST

RE

SE

T

RE

SE

T

TE

ST

qw763-083b

e r

763-059

G.F.C.I. receptacle test1. Start the engine.

2. Press the test button, then check the position ofthe reset button.

1 Test button 2 Reset button

3. If G.F.C.I. operation is correct, push in the resetbutton.If the G.F.C.I. operates incorrectly, consult aYamaha dealer.

Do not operate the generator with a faulty G.F.C.I.circuit. Electric shock could occur. Have the gen-erator repaired by a qualified mechanic.

WARNING

G.F.C.I. Reset G.F.C.I. Receptacle

Button Position Operation

after Test

3 Pop Out Correct

4 Stay In Incorrect

7CK-28199-12_b 11.3.21 13:47 Page 39

– 40 –

STORAGE

Long term storage of your generator will require somepreventive procedures to guard against deterioration.

763-120b

q

705-073

ON

OFF

q

Drain the fuel1. Turn the engine switch to “STOP”.

1 5 “STOP”

2. Remove the fuel tank cap. Extract the fuel fromthe fuel tank into an approved gasoline containerusing a commercially available handsiphon. Then,install the fuel tank cap.

Fuel is highly flammable and poisonous. Check“SAFETY INFORMATION” (See page 2) carefully.

Immediately wipe off spilled fuel with a clean, dry,soft cloth, since fuel may deteriorate painted sur-faces or plastic parts.

3. Turn the fuel cock knob to “ON”.

1 “ON”

4. Start the engine and leave it run until it stops.The engine stops in approximately 20 minutestime by running out of fuel.

TIP9 Do not connect with any electrical devices.

(unloaded operation)9 Duration of the running engine depends on the

amount of the fuel left in the tank.

NOTICE

WARNING

7CK-28199-12_b 11.3.21 13:47 Page 40

– 41 –



6. Drain the fuel remaining in the carburetor into anapproved container by loosening the drain screwon the carburetor float chamber.

1 Drain screw

7. Tighten the drain screw.

8. Turn the engine switch to “OFF”.

9. Turn the fuel cock knob to “OFF”.


1

2

788-7CKa

1

707-7CKd

11. Tighten further if any screws, bolts and nuts areloose.

12. Store the generator in a dry, well-ventilated place,with the cover placed over it.

7CK-28199-12_b 11.3.21 13:47 Page 41

– 42 –

EnginePerform the following steps to protect the cylinder, pis-ton ring, etc. from corrosion.1. Remove the spark plug cap and spark plug, pour

about one tablespoon of SAE 10W-30 or 20W-40motor oil into spark plug hole and reinstall thespark plug only.

2. Turn the engine switch to “START” and crank theengine several seconds with ignition off to coat thecylinder walls with oil.

3. Clean exterior of the generator and apply a rustinhibitor.

4. Store the generator in a dry, well-ventilated place,with the cover placed over it.

5. The generator must remain in a vertical positionwhen stored, carried or operated.

712-7XF

788-7XFg

6. The caster lock lever should be in the “Lock” whenstored or operated.

7CK-28199-12_b 11.3.21 13:47 Page 42

– 43 –

762-003

Battery1. Remove the battery.

2. Store the battery in a cool, dark and dry place andcharge it once a month.

Do not store the battery in an excessive cold or warmplace [i.e., less than 0°C (30°F) or more than 30°C(90°F)].

9 Disconnect the negative lead (black) first, thenthe positive lead (red) from the battery.

9 Connect the positive lead (red) first, then thenegative lead (black) to the battery wheninstalling the battery.

WARNING

7CK-28199-12_b 11.3.21 13:47 Page 43

– 44 –

707-7XFc

705-073

ON

OFF

q

700-006

791-001d

TROUBLESHOOTING

Engine won’t start1. Fuel systems

No fuel supplied to combustion chamber.2 No fuel in tank .... Supply fuel.2 Fuel in tank .... Fuel cock knob to “ON”.

1 “ON”

2 Clogged fuel line .... Clean fuel line.2 Clogged carburetor .... Clean carburetor.

2. Engine oil systemInsufficient

2 Oil level is low .... Add engine oil.

3. Electrical systems2 Engine switch to “START”.

1 6 “START”

Poor spark2 Spark plug dirty with carbon or wet .... Remove

carbon or wipe spark plug dry.2 Faulty ignition system .... Consult a Yamaha deal-

er.

763-120a

q

Generator won’t produce power• Safety device (AC protector) to “OFF”····Press the

AC protector to “Reset”.• The voltage select switch in the wrong

position····Turn the voltage select switch to theright position.

7CK-28199-12_b 11.3.21 13:47 Page 44

X Consult a Yamaha dealer.

W Engine does not start.

V OKCleanor

replace

U

– 45 –

A ENGINE DOES NOT START

B Turn the engine switch to “ON”, then turnthe engine switch to “START”. And checkif the starter motor cranks.

C Cranks D Does not crank

F Turn the engine switch to “START”, andcheck if the oil warning light comes on.

G Does not come on H Comes on

L Turn the engine switch to “START” andcheck the spark plug for spark strength.(See “WARNING”).

w9 To prevent FIRE HAZARDS be

sure fuel is not present in thespark plug area.

9 To prevent FIRE HAZARDS besure to place the spark plugas far away as possible fromthe spark plug hole and car-buretor area.

9 To prevent ELECTRIC SHOCKdo not hold spark plug leadwith hand while testing.

M OK N Does not spark.

R Check the following9 Fuel cock clogging9 Air cleaner element

clogging.

S Clogged

T OK

7CK-28199-12_b 11.3.21 13:47 Page 45

– 46 –

Faulty battery and/or starter motor.Consult a Yamaha dealer.

E

I Check engine oil level.

J OK K Level lowConsult a Yamaha dealer. Add engine oil.

O Check the spark plug.9 Type: BPR4ES (NGK)9 Gap: 0.7–0.8 mm (0.028–0.031 in)

P Incorrect Q OK

Replace oradjust gap.

Clean the sparkplug.

7CK-28199-12_b 11.3.21 13:47 Page 46

– 47 –

Unit EF6300iSDE

Type Air cooled 4-stroke gasoline OHVCylinder Arrangement Inclined, 1 cylinderDisplacement cm

3357

Bore × Stroke mm (in) 85.0 × 63.0 (3.35 × 2.48)Operation Hours Hr 5.1–13.3 (rated load–1/4 load)Fuel Unleaded gasolineFuel Tank Capacity L (US gal, Imp gal) 17.0 (4.49, 3.74)Engine Oil Quantity L (US qt, Imp qt) 1.3 (1.37, 1.14)Ignition System TCISpark Plug: Type BPR4ES (NGK)

Gap mm (in) 0.7–0.8 (0.028–0.031)Noise Level* dB / LWA 93

dB (A) / 7 m 58–64

SPECIFICATIONS

DimensionsUnit EF6300iSDE

Overall Length mm (in) 780 (30.7)Overall Width mm (in) 616 (24.3)Overall Height mm (in) 692 (27.2)Dry Weight kg (lb) 91 (200)

Engine

* : Noise level is measured when the economy control switch is turned to “ON”.LWA shows the sound power level under the ISO3744 satisfied test conditions.The noise level in “dB (A) / 7 m” is the arithmetic mean value in four directions measured 7meters away from each side of the generator. The noise level may vary in different environments.

GeneratorUnit EF6300iSDE

AC OutputRated voltage V 120/240Rated frequency Hz 60Rated current A 45.8/22.9Rated output kVA 5.5

Safety Device: Type Electronic + Mechanical (Bimetal)

BatteryUnit EF6300iSDE

Voltage V 12Capacity Ah 18

7CK-28199-12_b 11.3.21 13:47 Page 47

– 48 –

Identification number recordsRecord your Primary I.D., and serial num-bers in the spaces provided, to assist youin ordering spare parts from a Yamahadealer.Also record and keep these I.D. numbersin a separate place in case your machineis stolen.

PRI-I.D. NUMBER:

PRI-I.D.CODE SERIAL No.

MODEL

Serial NO.

7CK–7CK-24163-00

790-7CKb

CONSUMER INFORMATION

Machine identificationThe machine serial number is stamped inthe location as shown.

TIPThe first three digits of these numbers arefor model identification; the remaining dig-its are the unit production number. Keep arecord of these numbers for referencewhen ordering parts from a Yamaha deal-er.

7CK-28199-12_b 11.3.21 13:47 Page 48

– 49 –

EXHAUST EMISSION CONTROL SYSTEM AND COMPONENTS

Item Acronym9 CARB. ASSY., LH. & JT., ......................CARB (Carburetor)

CARBURETOR29 T.C.I. MAGNETO ASSY. & .....................EI (Electronic Ignition)

PLUG, SPARK9 CRANKCASE1 & HEAD, .......................PCV (Positive Crankcase

CYLINDER1 Ventilation)9 AIR FILTER ASSY. .................................ACL (Air Cleaner)9 MUFF., 2, CAP, NET, WIRE2 &

ARRESTER, SPARK

The above items and the corresponding acronyms are provided in accordance with U.S.EPA REGULATIONS FOR NEW NONROAD SPARK-IGNITION NONHANDHELDENGINES and the CALIFORNIA REGULATIONS FOR 1995 AND LATER SMALL OFF-ROAD ENGINES.The acronyms conform to the latest version of the SAE’s recommended practice docu-ment J1930, “Diagnostic Acronyms, Terms, and Definitions For Electrical/ElectronicSystem”.

It is recommended that these items be serviced by a Yamaha dealer.

7CK-28199-12_b 11.3.21 13:47 Page 49

– 50 –

— MEMO —

7CK-28199-12_b 11.3.21 13:47 Page 50

– 51 –

M

YR

B/W

L/R

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7CK-28199-12_b 11.3.21 13:47 Page 51

– 52 –

1M

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7CK-28199-12_b 11.3.21 13:47 Page 52

– 53 –

YAMAHA MOTOR CORPORATION, U.S.A. EF SERIES GENERATORS

3-YEAR LIMITED WARRANTY

Yamaha Motor Corporation, U.S.A. hereby war-rants that new Yamaha generators purchasedfrom an authorized Yamaha generator dealer inthe United States will be free from defects in mate-rial and workmanship for the period of time statedherein, subject to certain stated limitations.

THE PERIOD OF WARRANTY Any new EF-series Yamaha generator purchased from anauthorized Yamaha generator dealer in the UnitedStates will be warranted against defects in materi-al or workmanship for a period of three (3) yearsfrom date of purchase for pleasure or (exceptEF1000iS) commercial use, subject to exclusionsnoted herein. Yamaha EF1000iS generators pur-chased for commercial use from an authorizedYamaha generator dealer in the continental UnitedStates will be warranted against defects in materi-als or workmanship for a period of two (2) yearsfrom the date of purchase, subject to exclusionsnoted herein.

DURING THE PERIOD OF WARRANTY anyauthorized Yamaha generator service dealer will,free of charge, repair or replace, at Yamaha’soption, any part judged defective by Yamaha dueto faulty workmanship or material from the factory.Parts used in warranty repairs will be warrantedfor the balance of the product’s warranty period.All parts replaced under warranty become theproperty of Yamaha Motor Corporation, U.S.A.

GENERAL EXCLUSIONS from this warranty shallinclude any failures caused by:a. Installation of parts or accessories that are not

qualitatively equivalent to genuine Yamahaparts.

b. Abnormal strain, neglect, or abuse.c. Lack of proper maintenance.d. Accident or collision damage.

SPECIFIC EXCLUSIONS from this warranty shallinclude parts replaced due to normal wear or rou-tine maintenance.

THE CUSTOMER’S RESPONSIBILITY under thiswarranty shall be to:1. Operate and maintain the generator as speci-

fied in the appropriate Owner’s Manual.2. Give notice to an authorized Yamaha con-

sumer generator service dealer of any and allapparent defects within ten (10) days after dis-

covery, and make the machine available atthat time for inspection and repairs at suchdealer’s place of business. You may locateyour nearest authorized Yamaha generatorservice dealer online at www.yamaha-motor.com.

EMISSION CONTROL SYSTEM WARRANTYYamaha Motor Corporation, U.S.A. also warrantsto the ultimate purchaser and each subsequentpurchaser of each 1995 and later YamahaGenerator covered by this warranty that the prod-uct is designed, built, and equipped so as to con-form at the time of sale with all U.S. emissionsstandards applicable at the time of manufactureand that it is free from defects in materials andworkmanship which would cause it not to meetthese standards within the period listed immedi-ately below. Failures other than those resultingfrom defects in material or workmanship whicharise solely as a result of owner abuse and/or lackof proper maintenance are not covered by thiswarranty.All 1995 and Later EF ModelsTwo (2) years from the original purchase date

WARRANTY TRANSFER: To transfer anyremaining warranty from the original purchaser toany subsequent purchaser, it is imperative that theunit be inspected and registered for warranty byan authorized Yamaha consumer generator deal-er. In order for this warranty to remain in effect,this inspection and registration must take placewithin ten (10) days after transfer. A reasonabledealer imposed fee may be charged for theinspection.

YAMAHA MOTOR CORPORATION, U.S.A. MAKESNO OTHER WARRANTY OF ANY KIND,EXPRESSED OR IMPLIED. ALL IMPLIED WAR-RANTIES OF MERCHANTABILITY AND FITNESSFOR A PARTICULAR PURPOSE WHICH EXCEEDTHE OBLIGATIONS AND TIME LIMITS STATED INTHIS WARRANTY ARE HEREBY DISCLAIMED BYYAMAHA MOTOR CORPORATION, U.S.A. ANDEXCLUDED FROM THIS WARRANTY.

SOME STATES DO NOT ALLOW LIMITATIONS ONHOW LONG AN IMPLIED WARRANTY LASTS, SOTHE ABOVE LIMITATIONS MAY NOT APPLY TOYOU. ALSO EXCLUDED FROM THIS WARRANTYARE ANY INCIDENTAL OR CONSEQUENTIAL

7CK-28199-12_b 11.3.21 13:47 Page 53

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DAMAGES INCLUDING LOSS OF USE. SOMESTATES DO NOT ALLOW THE EXCLUSION ORLIMITATION OF INCIDENTAL OR CONSEQUEN-TIAL DAMAGES, SO THE ABOVE EXCLUSIONMAY NOT APPLY TO YOU.

THIS WARRANTY GIVES YOU SPECIFIC LEGALRIGHTS, AND YOU MAY ALSO HAVE OTHERRIGHTS WHICH VARY FROM STATE TO STATE.

YAMAHA MOTOR CORPORATION, U.S.A.Post Office Box 6555

Cypress, California 90630

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WARRANTY QUESTIONS AND ANSWERS

Q. Is the warranty transferable to second own-ers?

A. Yes. The remainder of the existing warrantycan be transfered upon request.The unit has to be inspected and reregisteredby an authorized Yamaha generator dealer forthe policy to remain effective.

CUSTOMER SERVICE

If your machine requires warranty service, youmust take it to any authorized Yamaha generatordealer within the continental United States. Besure to bring your warranty registration identifica-tion or other valid proof of the original date of pur-chase. If a question or problem arises regardingwarranty, first contact the owner of the dealership.Since all warranty matters are handled at the deal-er level, this person is in the best position to helpyou. If you are still not satisfied and require addi-tional assistance, please write:

YAMAHA MOTOR CORPORATION U.S.A. CUSTOMER RELATIONS DEPARTMENT

P.O. BOX 6555Cypress, California 90630

CHANGE OF ADDRESS

The federal government requires each manufac-turer to maintain a complete, up-to-date list of allfirst purchasers against the possibility of a safety-related defect and recall. This list is compiled fromthe purchase registrations sent to Yamaha MotorCorporation, U.S.A. by the selling dealer at thetime of your purchase. If you should move afteryou have purchased your new generator, pleaseadvise us of your new address by sending a post-card listing your Yamaha model name, enginenumber, dealer number (or dealer’s name) as it isshown on your warranty identification, your nameand new mailing address. Mail to:

YAMAHA MOTOR CORPORATION, U.S.A.WARRANTY DEPARTMENT

P.O. Box 6555Cypress, California 90630

This will ensure that Yamaha Motor Corporation,U.S.A. has an up-to-date registration record inaccordance with federal law.

Q. What costs are my responsibility during thewarranty period?

A. The customer’s responsibility includes allcosts of normal maintenance service, non-warranty repairs, accident damages, as wellas oil and spark plugs.

Q. What are some examples of “abnormal” strain,neglect, or abuse?

A. These terms are general and overlap eachother in areas. Specific examples include:Running the machine out of oil; lack of propermaintenance; operating the machine with abroken or damaged part which causes anoth-er part to fail; and so on. If you have anyspecific questions on operation or mainte-nance, please contact your dealer for advice.

Q. Does the warranty cover incidental costs suchas transportation due to a failure?

A. No. The warranty is limited to repair of themachine itself.

Q. May I perform any or all of the recommendedmaintenance shown in the Owner’s Manualinstead of having the dealer do them?

A. Yes, if you are a qualified mechanic and followthe procedures specified in the Owner’s andService Manual. We do recommend, however,that items requiring special tools or equipmentbe done by a Yamaha generator dealer.

Q. Will the warranty be void or cancelled if I donot operate or maintain my new Yamahaexactly as specified in the Owner’s Manual?

A. No. The warranty on a new Yamaha cannotbe “voided” or “cancelled.”However, if a particular failure is caused byoperation or maintenance other than asshown in the Owner’s Manual, that failuremay not be covered under warranty.

Q. What responsibility does my dealer haveunder this warranty?

A. Each Yamaha generator dealer is expectedto:1. Check the operation of the generator

before sale.2. Explain the operation, maintenance, and

warranty requirements to your satisfactionat the time of sale, and upon your requestat any later date.

In addition, each Yamaha generator dealer isheld responsible for his setup, service andwarranty repair work.

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YAMAHA OUTDOOR POWER EQUIPMENTCALIFORNIA EVAPORATIVE EMISSION CONTROL WARRANTY STATEMENT

YOUR WARRANTY RIGHTS AND OBLIGATIONS

The California Air Resources Board and YamahaMotor Corporation, USA are pleased to explain theevaporative emission control system’s warranty onyour 2006 or later outdoor power equipment. InCalifornia, new equipment that use small off-roadengines must be designed, built, and equipped tomeet the State’s stringent anti-smog standards.Yamaha Motor Corporation, USA must warrant theevaporative emission control system on your out-door power equipment for the period listed belowprovided there has been no abuse, neglect, orimproper maintenance of your equipment.

Your evaporative emission control system mayinclude parts such as: carburetors, fuel tanks, fuellines, fuel caps, valves, canisters, filters, vaporhoses, clamps, connectors, and other associatedcomponents. For engines less than or equal to80cc, only the fuel tank is subject is the evapora-tive emission control warranty requirements of thissection.

MANUFACTURER’SWARRANTY COVERAGE:This evaporative emission control system is war-ranted for two years. If any evaporative emission-related part on your equipment is defective, thepart will be repaired or replaced by Yamaha.

OWNER’SWARRANTY RESPONSIBILITIES:9 As the outdoor power equipment owner, you

are responsible for the performance of therequired maintenance listed in your owner’smanual. Yamaha recommends that you retainall receipts covering maintenance of your out-door power equipment, but Yamaha cannotdeny warranty solely for the lack of receipts.

9 As the outdoor power equipment owner, youshould however be aware that Yamaha maydeny you warranty coverage if your outdoorpower equipment or a part has failed due toabuse, neglect, or improper maintenance, orunapproved modifications.

9 You are responsible for presenting your out-door power equipment to a Yamaha servicecenter as soon as the problem exists. Thewarranty repairs should be completed in areasonable amount of time, not to exceed 30days.

If you have a question regarding your warrantycoverage, you should contact Yamaha CustomerRelations at 1-800-962-7926.

YAMAHA MOTOR CORPORATION, USAPost Office Box 6555


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YAMAHA MOTOR CORPORATION, U.S.A.SMALL OFF ROAD ENGINESCALIFORNIA EMISSION CONTROL WARRANTYYOUR WARRANTY RIGHTS AND OBLIGATIONS

The California Air Resources Board and Yamaha Motor Corporation, U.S.A. are pleased to explain theemission control system warranty on your 2008 and later Small Off Road Engine (SORE). In California,new SORE engines must be designed, built and equipped to meet the State’s stringent anti-smog stan-dards. Yamaha must warrant the emission control system on your SORE engine for the periods of timelisted below provided there has been no abuse, neglect or improper maintenance of your SORE engine.

Your emission control system may include parts such as the carburetor or fuel-injection system, the igni-tion system, and catalytic converter. Also included may be hoses, belts, connectors and other emission-related assemblies.

Where a warrantable condition exists, Yamaha will repair your SORE engine at no cost to you includingdiagnosis, parts and labor.

MANUFACTURER’S WARRANTY COVERAGE

The 2008 and later SORE engines are warranted for two years. If any emissions-related part on yourengine is defective, the part will be repaired or replaced by Yamaha.

OWNER’S WARRANTY RESPONSIBILITIES

9 As the SORE engine owner, you are responsible for the performance of the required maintenancelisted in your owner’s manual. Yamaha recommends that you retain all receipts covering maintenanceon your SORE engine, but Yamaha cannot deny warranty solely for the lack of receipts or for yourfailure to ensure the performance of all scheduled maintenance.

9 As the SORE engine owner, you should however be aware that Yamaha may deny you warranty cov-erage if your SORE engine or a part has failed due to abuse, neglect, improper maintenance or unap-proved modifications.

9 You are responsible for presenting your SORE engine to a Yamaha dealer as soon as a problemexists. The warranty repairs should be completed in a reasonable time, not to exceed 30 days.

If you have any questions regarding your warranty rights and responsibilities, you should contact theYamaha Customer Relations Department at 1-800-962-7926.

Yamaha Motor Corporation, U.S.A. warrants to the ultimate purchaser and each subsequent purchaserthereafter that each new SORE engine certified for sale and registered in California are:

1. Designed, built, and equipped so as to conform, at the time of sale, with all applicable regulationsadopted by the California Air Resources Board, and

2. All warranted parts are free from defects in material and workmanship for the warranty period of theSORE engine or the period prior to the first scheduled replacement point of the warranted part asrequired by the maintenance schedule, if applicable, whichever is less. A defect exists when a defi-ciency in material or workmanship is such that an emission-related warranted part does not functionas designed.

The warranty period begins on the date that the SORE engine is delivered to an ultimate purchaser or onthe date it is first placed in service.

The warranty on emissions-related parts will be interpreted as follows:(1) Any warranted part that is not scheduled for replacement as required maintenance in the written

7CK-28199-12_b 11.3.21 13:47 Page 57

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instructions required by subsection (d) must be warranted for the warranty period defined inSubsection (b)(2). If any such part fails during the period of warranty coverage, it must be repaired orreplaced by the manufacturer according to Subsection (4) below. Any such part repaired or replacedunder the warranty must be warranted for the remaining warranty period.

(2) Any warranted part that is scheduled only for regular inspection in the written instructions required bysubsection (d) must be warranted for the warranty period defined in Subsection (b)(2). A statement insuch written instructions to the effect of “repair or replace as necessary” will not reduce the period ofwarranty coverage. Any such part repaired or replaced under warranty must be warranted for theremaining warranty period.

(3) Any warranted part that is scheduled for replacement as required maintenance in the written instruc-tions required by subsection (d) must be warranted for the period of time prior to the first scheduledreplacement point for that part. If the part fails prior to the first scheduled replacement, the part mustbe repaired or replaced by the engine manufacturer according to Subsection (4) below. Any suchpart repaired or replaced under warranty must be warranted for the remainder of the period prior tothe first scheduled replacement point for the part.

(4) Repair or replacement of any warranted part under the warranty must be performed at no charge tothe owner at a warranty station.

(5) Notwithstanding the provisions of Subsection (4) above, warranty services or repairs must be provid-ed at all manufacturer distribution centers that are franchised to service the subject engines.

(6) The owner must not be charged for diagnostic labor that leads to the determination that a warrantedpart is in fact defective, provided that such diagnostic work is performed at a warranty station.

(7) The manufacturer is liable for damages to other engine components proximately caused by a failureunder warranty of any warranted part.

(8) Throughout the emissions warranty period defined in Subsection (b)(2), the manufacturer must main-tain a supply of warranted parts sufficient to meet the expected demand for such parts.

(9) Any replacement part may be used in the performance of any warranty maintenance or repairs andmust be provided without charge to the owner. Such use will not reduce the warranty obligations ofthe manufacturer.

(10)Add-on or modified parts that are not exempted by the Air Resources Board may not be used. Theuse of any non-exempted add-on or modified parts will be grounds for disallowing a warranty claim.The manufacturer will not be liable to warrant failures of warranted parts caused by the use of a non-exempted add-on or modified part.

(11)The manufacturer issuing the warranty shall provide any documents that describe that manufacturer’swarranty procedures or policies within five working days of request by the Air Resources Board.

WARRANTED PARTS INCLUDE the following:

1. Fuel Metering SystemCarburetor and internal parts (or fuel injection system)Air/fuel ratio feedback and control systemCold start enrichment system

2. Air Induction systemControlled hot air intake systemIntake manifoldAir filter

3. Ignition SystemSpark plugs*Magneto or electronic ignition systemSpark advance/retard system

4. Exhaust Gas Recirculation (EGR) SystemEGR valve body, and carburetor spacer if applicableEGR rate feedback and control system

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5. Air Injection SystemAir pump or pulse valveValves affecting distribution of flowDistribution manifold

6. Catalyst or Thermal Reactor SystemCatalytic converterThermal reactorExhaust manifold

7. Particulate ControlsTraps, filters, precipitators, and any other deviceused to capture particulate emissions

8. Miscellaneous Items Used in Above SystemsVacuum, temperature, and time sensitivevalves and switchesElectronic controlsHoses, belts, connectors, and assemblies

9. Engine components damaged due to a failure under warranty or a warranted part

*The original spark plug(s) are warranted for the period of replacement indicated in the Owner’s Manualand not the useful life of the SORE engine (see your Owner’s Manual).

DURING THE PERIOD OF THIS WARRANTY

Yamaha Motor Corporation, U.S.A. will repair or replace any warranted part deemed defective by Yamahaduring the scope of the warranty without charge to the owner, including parts, labor, and diagnosis. Thiswork must be done at an authorized Yamaha dealer. Give notice to an authorized Yamaha dealer of anyapparent defects(s) within a reasonable period of time after discovery. The SORE engine must be madeavailable for inspection by an authorized Yamaha dealer.

OWNER’S RESPONSIBILITY:

The owner of the SORE engine is responsible for the performance of required maintenance (see yourOwner’s Manual). Receipts and maintenance records covering the performance of regular maintenanceshould be retained in the event questions arise concerning maintenance. The receipts should be trans-ferred to each subsequent owner of this SORE engine.

The emission control systems of your Yamaha SORE engine were designed, built, tested, and certified asbeing in conformity with California emission control regulations using genuine Yamaha parts. Accordingly,it is recommended that any replacement part(s) used for maintenance, replacement, or repair of emissioncontrol systems be Yamaha parts. The owner may elect to have maintenance, replacement, or repair ofthe emission control devices and systems performed by any repair establishment or individual, and mayelect to use parts other than Yamaha parts for such maintenance, replacement, or repair without invalidat-ing this warranty. However, the cost of such service or parts will not be covered under the warranty.

EXCLUSIONS: No warranty coverage will be allowed if the part(s) failure was caused by owner/operatorabuse, neglect, tampering, improper adjustment unless performed by a dealer during warranty repairwork, modification, misuse, alteration, or improper maintenance (see your Owner’s Manual).

Use of parts which are not qualitatively equivalent to genuine Yamaha parts, improper service, or lack ofrequired maintenance which causes failure of a warranted part may constitute abuse and/or improper ser-vice, thereby invalidating warranty liability hereunder.

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This warranty does not cover damage resulting from accidents, acts of nature, or other events or occur-rences beyond the control of Yamaha. Yamaha Motor Corporation, U.S.A. expressly disclaims responsi-bility for any and all consequential damages, such as loss of time, inconvenience, loss or use of theSORE engine, or commercial loss.

YAMAHA MOTOR CORPORATION, U.S.A.Post Office Box 6555


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YAMAHA EXTENDED SERVICE (Y.E.S.)

Keep your Yamaha Generator protected even after your warranty expires with genuine Yamaha ExtendedService (Y.E.S.).

9 Y.E.S. is designed and administered by Yamaha Motor Corporation to provide maximum owner satis-faction. You get uninterrupted factory-backed coverage for extra peace of mind.

9 Y.E.S. is flexible. You can choose the plan that’s right for you: 12 months, 24 months or 36 monthscoverage.

9 Y.E.S. is administered by the same Yamaha people that handle your warranty - and it shows in thecomprehensive coverage benefits. There are no hour limitations and Y.E.S. covers manufacturingdefects just like your warranty. See a sample contract at your Yamaha dealer and see how comfort-ing uninterrupted factory backed protection can be.

9 There are no “out-of-pocket” expenses for covered repairs. Yamaha will never ask you to pay adeductible.

9 Nationwide coverage. Y.E.S. coverage is honored at any authorized Yamaha Outdoor PowerEquipment Service dealer.

9 Y.E.S. coverage is transferable to a new owner if you sell or trade-in. That can make you Yamahamuch more valuable.

This excellent Y.E.S. plan coverage is only available to Yamaha owners like you, and only while yourYamaha is still within the Yamaha Limited Warranty period. So visit your authorized Yamaha dealer toget all the facts. He can show you how easy it is to protect your investment with Yamaha ExtendedService.

Special note:If visiting your dealer isn’t convenient, contact Yamaha with your Primary ID number (your frame number).We’ll be happy to help you get the Y.E.S. coverage you need.

Yamaha Service MarketingP.O. Box 6555

Cypress, CA 906301-866-YES-EXTD(1-866-937-3983)

7CK-28199-12_b 11.3.21 13:47 Page 61

Read this manual carefully before operating this machine. This manualshould stay with this machine if it is sold.

7CK-9-12 hyoshi 11.4.13 14:40 Page 2

Generator

LIT-19626-01-737CK-28199-12PRINTED ON RECYCLED PAPER

PRINTED IN JAPAN2011.05-0.3×1 !

(E)

EF6300iSDE

OWNER’S MANUAL

Read this manual carefully before operating this machine.

7CK-9-12 hyoshi 11.4.13 14:40 Page 1

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