Generator

LIT-19626-01-23 7CF-28199-10PRINTED ON RECYCLED PAPERPRINTED IN JAPAN05 902 – 0.4 × 1 !

EF2400iS

OWNER’S MANUAL

7CF-9-10 hyoshi 2/15/05 3:01 PM Page 1

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AE00012

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. numbers ina separate place in case your machine isstolen.

AE00002

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

PRI-I.D. NUMBER

PRI-I.D.CODE SERIAL No.

EF2400iSOWNER’S MANUAL

© 2005 by Yamaha Motor Corporation, U.S.A.1st Edition, February 2005

All rights reserved.Any reprinting or unauthorized usewithout the written permission of Yamaha Motor Corporation, U.S.A.

is expressly prohibited.Printed in Japan.

P/N LIT-19626-01-23

MODEL

790-072

7CH-24163-**

AE00022

AE00011

MACHINE IDENTIFICATIONThe machine serial number is stamped inthe location as shown.

NOTE:The 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 dealer.

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NOTE:9 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 there isany question concerning this manual,please consult your Yamaha dealer.

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

AE00032

wPLEASE READ AND UNDERSTANDTHIS MANUAL COMPLETELY BEFOREOPERATING THE MACHINE.

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

-The Safety Alert Symbol means ATTEN-TION! BECOME ALERT! YOUR SAFETYIS INVOLVED!

wFailure to follow WARNING instructionscould result in severe injury or death to theengine operator, a bystander, or a personinspecting or repairing the engine.

cCA CAUTION indicates special precautionsthat must be taken to avoid damage to theengine.

NOTE:A NOTE provides key information to makeprocedures easier or clearer.

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AE00041

CONTENTS

LIMITED WARRANTY (EF- AND EDL-SERIES)..........................................1

LOCATION OF IMPORTANT LABELS ..3

SAFETY INFORMATION ........................5

EXHAUST FUMES ARE

POISONOUS .......................................5

FUEL IS HIGHLY FLAMMABLE ANDPOISONOUS .......................................5

ENGINE AND MUFFLER MAY

BE HOT................................................5

ELECTRIC SHOCK PREVENTION.....6

CONNECTION NOTES .......................7

CONNECTION.....................................7

EXTENSION CORD NOTES ...............7

CONTROL FUNCTION ...........................8

DESCRIPTION ....................................8

CONTROL PANEL ...............................8

OIL WARNING SYSTEM .....................9

ENGINE SWITCH................................9

DC PROTECTOR ................................9

PRE-OPERATION CHECK ...................10

FUEL..................................................10

ENGINE OIL ......................................11

GROUND (Earth)...............................11

OPERATION .........................................12

STARTING THE ENGINE ..................12

APPLICATION RANGE......................14

CONNECTION...................................15

STOPPING THE ENGINE..................19

PERIODIC MAINTENANCE .................20

MAINTENANCE CHART ...................20

SPARK PLUG INSPECTION .............22

CARBURETOR ADJUSTMENT.........22

ENGINE OIL REPLACEMENT ..........23

MUFFLER SCREEN AND SPARKARRESTER .......................................24

AIR FILTER........................................26

FUEL TANK FILTER...........................27

TROUBLESHOOTING ..........................28

STORAGE .............................................30

DRAIN THE FUEL .............................30

ENGINE .............................................30

EXHAUST EMISSION CONTROL SYSTEM AND COMPONENTS............31

SPECIFICATIONS.................................32

DIMENSIONS ....................................32

ENGINE .............................................32

GENERATOR.....................................32

WIRING DIAGRAM ...............................33

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AE01120

YAMAHA MOTOR CORPORATION U.S.A.EF- AND EDL-SERIES GENERATOR LIMITED WARRANTY

Yamaha Motor Corporation, U.S.A. hereby warrantsthat new Yamaha consumer generators purchasedfrom an authorized Yamaha consumer generatordealer in the continental United States will be freefrom defects in material and workmanship for theperiod of time stated herein, subject to certain stat-ed limitations.

THE PERIOD OF WARRANTY Any new EF-seriesor EDL-series Yamaha Generator purchased forprivate, non-commercial use from an authorizedYamaha consumer generator dealer in the conti-nental United States will be warranted against defects in material or work-manship for a period two (2) years from date of pur-chase, subject to exclusions noted herein. AnyYamaha non-commercial generator purchased and utilized for commercial orrental applications will be warranted for a periodone (1) year from the date of purchase, subject toexclusions noted herein.

DURING THE PERIOD OF WARRANTY anyauthorized Yamaha consumer generator dealer will,free of charge, repair or replace, at Yamaha’soption, any part adjudged defective by Yamaha dueto faulty workmanship or material from the factory.Parts used in warranty repairs will be warranted forthe balance of the product’s warranty period. Allparts replaced under warranty become property ofYamaha 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 dealer of any and all apparentdefects within ten (10) days after discovery,and make the unit available at that time forinspection and repairs at such dealer’s place ofbusiness.

WARRANTY TRANSFER: To transfer the warrantyfrom the original purchaser to any subsequent pur-chaser(s), it is imperative that the unit be inspectedand registered for warranty by an authorizedYamaha consumer generator dealer. In order forthis warranty to remain in effect, this inspection andregistration must take place within ten (10) daysafter transfer. An inspection and registration fee willbe charged for this service. In no case will the war-ranty be extended beyond the original period.

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 LIMITATION MAY NOT APPLY TO YOU.ALSO EXCLUDED FROM THIS WARRANTY AREANY INCIDENTAL OR CONSEQUENTIAL DAM-AGES INCLUDING LOSS OF USE. SOME STATESDO NOT ALLOW THE EXCLUSION OR LIMITATIONOF INCIDENTAL OR CONSEQUENTIAL DAMAGES,SO THE ABOVE EXCLUSION MAY NOT APPLY TOYOU.

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. What costs are my responsibility during thewarranty period?

A. The customer’s responsibility includes all costsof normal maintenance service, non-warrantyrepairs, accident damages, as well as oil andspark 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 any spe-cific questions on operation or maintenance,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 do notoperate or maintain my new Yamaha exactly asspecified in the Owner’s Manual?

A. No. The warranty on a new Yamaha cannot be“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 have underthis warranty?

A. Each Yamaha generator dealer is expected to: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 and war-ranty repair work.

Q. Is the warranty transferable to second owners?A. Yes. The remainder of the existing warranty

can 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. Be sureto bring your warranty registration identification orother valid proof of the original date of purchase. Ifa question or problem arises regarding warranty,first contact the owner of the dealership. Since allwarranty matters are handled at the dealer level,this person is in the best position to help you. If youare still not satisfied and require additional assis-tance, 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 manufactur-er to maintain a complete, up-to-date list of all firstpurchasers against the possibility of a safety-relat-ed defect and recall. This list is compiled from thepurchase registrations sent to Yamaha MotorCorporation, U.S.A. by the selling dealer at the timeof your purchase. If you should move after you havepurchased your new generator, please advise us ofyour new address by sending a postcard listingyour Yamaha model name, engine number, dealernumber (or dealer’s name) as it is shown on yourwarranty identification, your name and new mailingaddress. 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.

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AE00062

LOCATION OF IMPORTANT LABELSPlease read the following labels carefully before oper-ating this machine.

NOTE:Maintain or replace safety and instruction labels, asnecessary.

4 31

2

792-063

3 4

792-064

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1 2

4

3

WARNINGREAD THE OWNER’S MANUAL AND ALL LABELS BEFORE OPERATING.

q qAVERTISSEMENT8

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.

8

8

8

8

8

MACHINE AUSEC EN TOUTES CIRCONSTANCES.7CF-24162-10

8

8

8

8

8

8

LISEZ LE MODE D’EMPLOI ET TOUTES LES ETIQUETTES AVANT DEFAIRE 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 FONCTIONNESOUS LA PLUIE, DANS LA NEIGE, OU PRES DE L’EAU. GARDEZ LA

0 2 4 6 8 1 0

ENGINE AIR INDEX ( C a l i f o r n i a o n l y )

LEAST CLEANMOST C L E A NN O T E : T H E L O W E R T H E A I R I N D E X , T H E L E S S T H E P O L L U T I O N

F O R T H E F O L L O W I N G U S E :

T H I S E N G I N E I S C E R T I F I E D T O B E E M I S S I O N C O M P L I A N T

MODERATE INTERMEDIATE EXTENDEDCHECK OWNERS M A N U A L F O R F U R T H E R D E T A I L S

T H I S L A B E L T O B E R E M O V E D B Y T H E U L T I M A T E P U R C H A S E R O N L Y !

IMPORTANT ENGINE INFORMATIONENGINE FAMILY : zzzzzzzzzzzzE M

REFER TO OWNER'S MANUAL FOR MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS.

YAMAHA MOTOR CO. LTD

DISPLACEMENT: VALVE LASH (A)

rpm

NO OTHER ADJUSTMENTS NEEDED.

ENGINE OIL:

IDLE SPEED:

FUEL: THIS ENGINE IS CERTIFIED TO OPERATE ON UNLEADED GASOLINE.

IGNITION TIMING & IDLE MIXTUREzzzJ IN:

TYPE

z.zz~z.zz EX:z.zz~z.zz

zzzz~zzzz AT NO LOAD

SESAE 10W-30THIS ENGINE MEETS zzzz-zzzz CALIFORNIA EMISSION REGULATIONS FOR SMALL OFF-ROAD ENGINES.THIS ENGINE CONFORMS TO PHASE 2 U.S.EPA REGULATIONS FOR SMALL NONROAD ENGINES.EMISSIONS COMPLIANCE PERIOD:CATEGORY A (EPA) zzz-2179R-00

HOT EXHAUST***-28176-**

OIL

zzzzzz

AC output zzHz

Rated zzzKVA

Phase Single

DC output zzV zzA

Fuel Gasoline

YAMAHA MOTOR CO., LTD.MADE IN JAPAN

zzzV

***-24164-**

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741-113

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741-115

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AE00071

SAFETY INFORMATION

AE00072

EXHAUST FUMES ARE POISONOUS9 Never operate the engine in a closed area or it may

cause unconsciousness and death within a shorttime. Operate the engine in a well ventilated area.

AE00075

FUEL IS HIGHLY FLAMMABLE AND POISONOUS9 Always turn off the engine when refuelling.9 Never refuel while smoking or in the vicinity of an

open flame.9 Take care not to spill any fuel on the engine or muf-

fler when refuelling.9 If you swallow any fuel, inhale fuel vapor, or allow

any 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 and changeyour clothes.

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

AE00843

ENGINE AND MUFFLER MAY BE HOT9 Place the machine in a place where pedestrians or

children are not likely to touch the machine.

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

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a

9 Keep the machine at least 1 m (3 ft) from buildingsor other equipment, or the engine may overheat.

a 1 m (3 ft)

741-119

9 Avoid operating the engine with a dust cover.

1

741-124

9 Be sure to carry the generator only by its carryinghandle(s).

1 Carrying handle(s) (shaded)

741-120

AE00083

ELECTRIC SHOCK PREVENTION9 Never operate the engine in rain or snow.

741-121

9 Never touch the machine with wet hands or electri-cal shock will occur.

741-125

1

9 Be sure to ground (earth) the generator.NOTE:Use ground (earth) lead of sufficient current capacity.

1 Lead diameter

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Ground (earth) LeadDiameter:

0.12 mm (0.005 in)/ampereEX;

10 Ampere → 1.2 mm (0.05 in)

1

2

1

741-122

AE01181

CONNECTION NOTES9 Avoid connecting the generator to commercial

power outlet.

1 Correct2 Incorrect

AE00091

CONNECTION

wBefore 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 power sup-ply has failed or has been turned off for line repair.Backfeeding can electrocute or injure line mainte-nance personnel. Also, generator and buildingelectrical system damage can occur when normaloperating power returns if unit is used without anisolation switch.

AE00086

EXTENSION CORD NOTES9 When using an extension cord, its total length

should not exceed60 meters for cross section of 1.5 mm squareand100 meters for cross section of 2.5 mm square.

9 This extension cord should be protected by a toughflexible rubber sheath (IEC 245) or the equivalentto withstand mechanical stresses.

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AE00101

CONTROL FUNCTION

56

23

4

1 1

793-146

1 123

7 793-147

q w e r

o i u

t y

793-148

AE00103

CONTROL PANEL1 Engine switch2 Twin Tech (parallel running terminal)3 DC protector4 Oil warning light5 AC pilot light6 Overload indicator light7 AC receptacle8 DC receptacle9 Ground (Earth) terminal

AE00102

DESCRIPTION1 Carrying handles (shaded)2 Fuel level gauge3 Fuel tank cap4 Oil filler cap5 Recoil starter6 Fuel cock7 Muffler

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700-121

763-259

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w

AE00111

OIL WARNING SYSTEMWhen the oil level falls below the lower level, the enginestops automatically. Unless you refill with oil, the enginewill not start again.

NOTE:If the engine stalls or does not start, turn the engineswitch to “ON” position and then pull the recoil starter.If the oil warning light flickers for a few seconds, theengine oil is insufficient. Add oil and restart.

AE00124

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.

763-260

763-238a

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AE00780

DC PROTECTORThe DC protector turns off automatically when the loadexceeds the generator rated output.

cCReduce the load to the specified generator ratedoutput if the DC protector turns off. If it turns offagain, consult a Yamaha dealer.

NOTE:Press to reset the DC protector.

1 I “ON”2 3 “OFF”

763-263

AE01179

TWIN TECH (TERMINAL FOR CONNECTING SPECIAL CABLESFOR PARALLEL RUNNING )This is the terminal for connecting special cables for par-allel running of two EF2400iS. The parallel runningrequires two EF2400iS and the special cables. (Therated output in parallel running is 3.6 kVA and the ratedcurrent is 30.0 A.)The handling, operation procedure and the notes onusage are described in the PARALLEL RUNNING KITOWNER’S MANUAL included in the Parallel Running Kit.Consult a Yamaha dealer for this Parallel Running Kit.

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741-123

707-033c

q

707-106

707-037

707-107

AE00845

PRE-OPERATION CHECK

NOTE:Pre-operation checks should be made each time thegenerator is used.

wThe 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.

AE00856

FUELMake sure there is sufficient fuel in the tank.

Your Yamaha engine has been designed to use regularunleaded gasoline with a pump octane number ((R +M)/2) of 86 or higher, or research octane number of 91or higher.

1 Fuel level gauge

w9 Fuel is highly flammable and poisonous. Check

“SAFETY INFORMATION” (See page 5) careful-ly before refueling.

9 Do not fill above the top of the fuel filter or itmay overflow when the fuel heats up later andexpands.

9 Wipe up any spilled fuel immediately.9 After refueling, make sure the tank cap is tight-

ened securely.

Recommended fuel:Unleaded gasoline

Fuel tank capacity:Total: 6.0 L (1.32 Imp gal, 1.59 US gal)

“F” Full“E” Empty

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700-128

741-126

700-103c

q

700-065

0°C 25°C

80°F32°F

A YAMALUBE 4(10W-30)

D SAE 10W C SAE #20 B SAE #30

700-006

AE00222

ENGINE OILMake sure the engine oil is at the upper level of the oilfiller hole.Add oil as necessary.

1 Upper level

NOTE:Recommended engine oil classification:API Service “SE” or “SF”.

cCThe generator has been shipped without engine oil.Fill with oil or it will not start.

AE00241

GROUND (Earth)

Make sure to ground (earth) the generator.Check “SAFETY INFORMATION” on page 6.

Recommended oil:å YAMALUBE 4 (10W-30) or SAE 10W-30

type SE motor oil∫ SAE #30ç SAE #20∂ SAE 10W

Engine oil quantity:0.6 L (0.53 lmp qt, 0.63 US qt)

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700-006a

a

761-085

705-075

1

AE00955

OPERATION

NOTE:The generator has been shipped without engine oil. Fillwith oil or it will not start.

1 Upper level

AE01171

STARTING THE ENGINE

NOTE:9 Before starting the engine, do not connect any

electric devices.

1. Turn the fuel cock lever to the “ON” position.

1 “ON”

2. Pull the choke knob fully out.

2 Choke knob

NOTE:The choke is not required to start a warm engine.Push the choke knob in to the original position.

3. Turn the engine switch to the “7” (ON) position.3 7 “ON”

701-051

2

e

763-261

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4. Pull slowly on the recoil starter until it is engaged,then pull it briskly.

5. After the engine starts, warm up the engine untilthe engine does not stop when the choke knob isreturned to the original position.

6. Push the choke knob back to the original position.

NOTE:When starting the engine in areas where the ambienttemperature is below 0°C (32°F), the engine automati-cally operates at the rated r/min (3,200 r/min) for threeminutes to warm up the engine

704-019

701-051a

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AE01180

APPLICATION RANGE

AC DC

Power factor 1 0.8–0.950.4–0.75

(Efficiency 0.85)

EF2400iS –2,000W –1,600W –680W

Rated voltage12V

Rated current8A

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

used by itself.9 The overload indicator light 1 comes on when

total wattage exceeds the application range. (Seepage 16 for more details.)

cC9 Be sure the total load is within generator rated

output otherwise generator damage will occur.9 Do not use AC and DC power at the same time

or the generator may be damaged.

NOTE:Some precision equipment is voltage sensitive and mayrequire a more uniform voltage supply than portablegenerators provide. Examples include some medicalequipment, personal computers, and some invertersthat sense peak and RMS voltage values. Consult theprecision-equipment vendor before relying on anyportable generator to provide power to such equipment.

q

760-029

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761-086

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760-030

AE01172

CONNECTION

Alternating Current (AC)

cC9 Be sure all electric devices including the lines

and plug connections are in good conditionbefore connection to the generator.

9 Be sure any electric devices are turned offbefore plugging it in.

9 Be sure the total load is within generator ratedoutput.

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

1. Wind the power lead 2 or 3 turns around handle.2. Start the engine.3. Plug in to the AC receptacle.

4. Make sure the AC pilot light is on.

1 AC pilot light

5. Turn on any electric devices.

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760-029

AE00788

Overload indicator lightThe overload indicator light 1 comes on when an over-load of a connected electrical device is detected, theinverter control unit overheats, or the AC output voltagerises. The electronic breaker will then activate, 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.

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 electric

devices within the application range.3. Check for blockages in the cooling air inlet and

around the control unit. If any blockages are found,remove.

4. After checking, restart the engine.

NOTE:9 The generator AC output automatically resets

when the engine is stopped and then restarted.9 The overload indicator light may come on for a few

seconds at first when using electric devices thatrequire a large starting current, such as a com-pressor or a submergible pump. However, this isnot a malfunction.

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761-086a

762-046

12

12v762-047

763-238a

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AE00904

Battery Charging

cCDo not use AC and DC power at the same time orthe generator may be damaged.

NOTE:The generator DC rated voltage is 12V.

1. Wind the battery charging lead 2 or 3 turns aroundthe handle and plug into DC receptacle.

NOTE:9 Make connections to the battery after starting the

engine.9 Clamp the red wire to the positive (+) terminal and

the black wire to the negative (-) terminal of thebattery. Do not reverse these positions.

1 Red2 Black

2. Start the engine.3. Press in the DC protector and install the battery.

cC9 Be sure the battery leads are properly connect-

ed.9 Be sure the breather hose is properly connect-

ed and is not damaged or obstructed.9 Reduce the load to the specified generator

rated output if the DC protector turns off. If itturns off again, consult a Yamaha dealer.

NOTE:Press to reset the DC protector.

1 “ON”2 “OFF”

NOTE:9 At full charge, electrolyte specific gravity is

between 1.26 and 1.28.9 Check specific gravity hourly.

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wNever smoke or make and break connections at thebattery while charging. Sparks may ignite the bat-tery gas.Battery electrolyte is poisonous and dangerous,causing severe burns, etc. contains sulfuric (sul-phuric) acid. Avoid contact with skin, eyes or cloth-ing.Antidote:EXTERNAL-Flush with water.INTERNAL-Drink large quantities of water or milk.Follow with milk of magnesia, beaten egg or veg-etable oil. Call physician immediately.EYES: Flush with water for 15 minutes and getprompt medical attention. Batteries produce explo-sive gases. Keep sparks, flame, cigarettes, etc.,away. Ventilate when charging or using in closedspace. Always cover eyes when working near bat-teries. KEEP OUT OF REACH OF CHILDREN.

762-012

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761-085

763-262

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705-075a

2

AE01173

STOPPING THE ENGINE

NOTE:9 Turn off any electric devices.

1. Disconnect any electric devices.

2. Turn the engine switch to the “5” (STOP) position.

1 5 “STOP”

3. Turn the fuel cock lever to “OFF”.

2 “OFF”

7CF-9-10-a 3/9/05 9:21 AM Page 19

– 20 –

No. Item Remarks

Pre-Ope-rationcheck(daily)

Initial Every

1month

or 20 Hr

3monthsor 50 Hr

6months

or 100 Hr

12months

or 300 Hr

Check condition.

1. **Adjust gap and

0Spark Plug clean. Replace if

necessary.

**Check and adjust

2.* Valve Clearance when engine is 0

cold.

Check breather** hose for cracks or

03.* Crankcasedamage. Replacebreather systemif necessary.

4.* ** Check and adjust0Idle speed

engine idle speed.

Check for leakage.Retighten or

0*replace gasket

**if necessary.

5. Exhaust System Check mufflerscreen and sparkarrester. Clean/ 0

replace ifnecessary.

Check oil level 06. Engine Oil

Replace 0 0

** Clean.7. Air Filter Replace if 0

necessary.

AE00401

PERIODIC MAINTENANCE

AE00403

MAINTENANCE CHARTRegular maintenance is most important for best performance and safe operation.

wStop the engine before starting maintenance work.

* : It is recommended that these items be serviced by a Yamaha dealer.** : Related to emission control system.

7CF-9-10-b 3/9/05 10:35 AM Page 20

– 21 –

* : It is recommended that these items be serviced by a Yamaha dealer.** : Related to emission control system.

cCUse only Yamaha specified genuine parts for replacement. Ask an authorizedYamaha dealer for further attention.

Clean fuel tank 8. Fuel Filter filter. Replace if 0

necessary.

Check fuel hose

9. Fuel Linefor crack or da-

0mage. *Replaceif necessary.

10. ** Check choke0Choke knob

operation.

11. Cooling SystemCheck for fan

0damage.

Check recoil012. Starting System

starter operation.

13.*** More frequently

0Decarbonizationif necessary.

14. GenerationCheck the pilot

0light comes on.

Check all fittings

15.*Fittings/ and fasteners.

0Fasteners Correct if

necessary.

No. Item Remarks

Pre-Ope-rationcheck(daily)

Initial Every

1month

or 20 Hr

3monthsor 50 Hr

6months

or 100 Hr

12months

or 300 Hr

7CF-9-10-b 3/9/05 10:35 AM Page 21

– 22 –

788-014

1 1

2

760-031

a

760-001a

AE01051

SPARK PLUG INSPECTIONYou should periodically remove and inspect the sparkplug.1. Loosen the bolt 1 and remove the side cover 2.2. Remove the spark plug cap and the spark plug.3. Check for discoloration and remove the carbon.

4. Check the spark plug type and gap.

a Gap

5. Install the spark plug.

6. Install the spark plug cap.7. Install the side cover and tighten the bolt.

Standard electrode color:Tan Color

Standard Spark Plug:BPR4ES (NGK)

Spark Plug Gap:0.7–0.8 mm (0.028–0.031 in)

Spark Plug Torque:17.5 N•m (1.75 kgf•m, 13 lbf•ft)

AE00431

CARBURETOR ADJUSTMENTThe carburetor is a vital part of the engine. Adjustingshould be left to a Yamaha dealer with the professionalknowledge, specialized data, and equipment to do soproperly.

7CF-9-10-b 3/9/05 10:35 AM Page 22

– 23 –

700-133

3

3

64

700-006a

q

AE01174

ENGINE OIL REPLACEMENT1. Place the machine on a level surface and warm up

the engine for several minutes.Then stop the engine.

2. Remove the rubber cap 1 on the bottom.

3. Place an oil pan under the engine . Remove thedrain bolt 2.

4. Open the oil filler cover 3 as shown and removethe oil filler cap 4 so that the oil can be complete-ly drained.

5. Check the drain bolt , gasket 5, oil filler cap and O-ring 6.If damaged, replace.

6. Reinstall the oil drain bolt.

7. Add engine oil to the upper level.1Upper level

700-130

1

700-132

2

5

Drain Bolt Torque:17 N•m (1.7 kgf•m, 12 lbf•ft)

7CF-9-10-b 3/9/05 10:35 AM Page 23

– 24 –

741-123

788-016

1

711-077

32

AE01028

MUFFLER SCREEN AND SPARK ARRESTER

wThe 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.

1. Remove the cover 1

2. Remove the muffler screen.

2 Muffler screen3 Screw

NOTE:Recommended engine oil classification:API Service “SE” or “SF”.

cCBe sure no foreign material enters the crankcase.

8. Install the oil filler cap.9. Install the rubber cap on the bottom.

cCBe sure to install securely to prevent from fallingoff during operation.

10. Close the oil filler cover.

700-065

0°C 25°C

80°F32°F

A YAMALUBE 4(10W-30)

D SAE 10W C SAE #20 B SAE #30

Recommended oil:å YAMALUBE 4 (10W-30) or SAE 10W-30

type SE motor oil∫ SAE #30ç SAE #20∂ SAE 10W

Engine oil quantity:0.6 L (0.53 Imp qt, 0.63 US qt)

7CF-9-10-b 3/9/05 10:35 AM Page 24

– 25 –

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

7. Install the spark arrester.NOTE:Align the spark arrester projection with the hole in themuffler pipe.

1 Projection2 Hole

8. Install the muffler screen.

9. Install the cover.

711-080

qw

711-081

788-016a

711-079

q

711-075

4. Remove the spark arrester.

1 Spark arrester

5. Remove the carbon deposits on the muffler screenand spark arrester using a wire brush.

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

711-078

3. Use a flathead screw driver to pry the sparkarrester out from the muffler.

7CF-9-10-b 3/9/05 10:35 AM Page 25

– 26 –

cCDo not wring out the element.This could cause it to tear.

5. Insert the element into the air filter.

NOTE:Be sure the element sealing surface matches the air fil-ter so there is no air leak.

cCThe engine should never run without the element;excessive piston and cylinder wear may result.

wNever use solvent while smoking or in the vicinityof an open flame.

6. Install the air filter cover.7. Install the cover and tighten the bolt.

710-037a

2. Remove the air filter cover and element.

3. Wash the foam element in solvent and dry.

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

Recommended oil:Foam-air-filter oil

orSAE #20 motor oil

E01175

AIR FILTER1. Loosen the bolt 1 and remove the cover 2.

788-017

1

2

1

7CF-9-10-b 3/9/05 10:35 AM Page 26

– 27 –

707-108

q

AE00471

FUEL TANK FILTER1. Remove the fuel tank cap and filter.

1 Filter

2. Clean the filter with solvent. If damaged, replace.3. Wipe the filter and insert it.

wBe sure the tank cap is tightened securely.

7CF-9-10-b 3/9/05 10:35 AM Page 27

– 28 –

707-106

705-075b

700-006

763-261a

760-009

AE01176

TROUBLESHOOTING

Engine won’t start1. Fuel systems

No fuel supplied to combustion chamber.2 No fuel in tank .... Supply fuel.

2. Engine oil systemInsufficient

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

3. Electrical systems2 Engine switch to “ON”.

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

bon or wipe spark plug dry.2 Faulty ignition system .... Consult dealer.

4. CompressionInsufficient

2 Worn out piston and cylinder .... Consult dealer.2 Loose cylinder head nuts .... Tighten nuts properly.2 Damaged gasket .... Replace gasket.

AE00785

Generator won’t produce power2 Safety device (AC) to “OFF” .... Stop the engine,

then restart.2 Safety device (DC protector) to “OFF” .... Press to

reset the DC protector.

2 Fuel in tank .... Fuel cock lever to “ON”.2 Clogged fuel line .... Clean fuel line.2 Clogged carburetor .... Clean carburetor.

7CF-9-10-b 3/9/05 10:35 AM Page 28

– 29 –

P OK

O Clogged

Engine does notstart.

C Does not flicker D Flickers.

B

AE00515

A ENGINE DOES NOT START

Turn the engine switch to “ON”, then pullthe recoil starter and check if the oilwarining light flickers.

H Pull the recoil starter and check thespark 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 plug as farway as possible from the sparkplug hole and carburetor area.

9 To prevent ELECTRIC SHOCK donot hold spark plug lead withhand while testing.

Engine starts.I J

Check the following9 Fuel line clogging9 Air cleaner element

clogging.

N Clean or Replace; Consult a Yamaha dealer.

Q

R Consult a Yamaha dealer.

K Check the spark plug.9 Type:9 Gap:

L Incorrect M OK

Replace orAdjust Gap.

Clean the sparkplug.

E Check engine oil level.

F OK G Level low

Consult aYamaha dealer.

Add engine oil.

7CF-9-10-b 3/9/05 10:35 AM Page 29

– 30 –

707-109

1

712-030

AE00601

STORAGELong term storage of your machine will require somepreventive procedures to guard against deterioration.

AE01177

DRAIN THE FUEL1. Remove the fuel tank cap. Drain the fuel from the

fuel tank into an approved gasoline container usinga commercially available hand siphon. Then, installthe fuel tank cap.

w9 Fuel is highly flammable and poisonous. Check

“SAFETY INFORMATION” (See page 5) careful-ly.

9 Wipe up any spilled fuel immediately.

2. Drain fuel from the carburetor by loosening thedrain screw 1 on the carburetor float chamber.

3. Turn the fuel cock lever to “OFF”. Start the engineand leave it run until it stops.This will burn any remaining fuel in the carburetor.

AE00621

ENGINE1. Remove the spark plug, pour about one table-

spoon of SAE 10W30 or 20W40 motor oil into thespark plug hole and reinstall the spark plug. Recoilstart the engine by turning over several times (withignition off) to coat the cylinder walls with oil.

2. Pull the recoil starter until you feel compression.Then stop pulling. (This prevents the cylinder andvalves from rusting).

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.

7CF-9-10-b 3/9/05 10:35 AM Page 30

– 31 –

AE00789

EXHAUST EMISSION CONTROL SYSTEMAND 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.

7CF-9-10-b 3/9/05 10:35 AM Page 31

– 32 –

Unit EF2400iSType Forced air cooled 4-stroke gasoline OHVCylinder Arrangement Inclined, 1 cylinderDisplacement cm3 171Bore × Stroke mm (in) 66.0 × 50.0 (2.60 × 1.97)Rated Output kW(HP)/r/min 2.5 (3.4)/3,200Operation Hours at rated operation Hr 8.6Fuel Unleaded gasolineFuel Tank Capacity L (Imp gal, US gal) 6.0 (1.32, 1.59)Engine Oil Quantity L (Imp qt, US qt) 0.6 (0.53, 0.63)Ignition System TCI

Spark Plug: Type BPR4ES (NGK)Spark Plug: Gap mm (in) 0.7–0.8 (0.028–0.031)

Noise Level* dB (A) 59

Unit EF2400iSOverall Length mm (in) 527 (20.7)Overall Width mm (in) 419 (16.5)Overall Height mm (in) 461 (18.1)Dry Weight kg (lb) 32 (72)

AE00701

SPECIFICATIONSAE00702

DIMENSIONS

AE00704

ENGINE

Unit EF2400iS

AC OutputRated Voltage V 120Rated frequency Hz 60Rated current A 16.7Rated Output kVA 2.0Safty Device: Type Electronic

DC OutputRated voltage V 12Rated current A 8Safety Device: Type DC protector

AE00707

GENERATOR

*: Measured at rated operation from 7 m (23 ft) distance.

7CF-9-10-b 3/9/05 10:35 AM Page 32

– 33 –– 33 –

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AE00751

WIRING DIAGRAM

1 Main coil2 DC coil3 Sub coil4 DC rectifier5 Control unit6 AC pilot light7 Parallel terminal8 AC receptacle9 Ground (Earth) terminal0 Overload indicator lightq DC receptaclew DC protector (breaker)e Engine switchr Oil warning lightt Speed limiter assemblyy Oil level gaugeu T.C.I. magnetoi T.C.I. unito Spark plug

p Stepping motor Color codeB BlackBr BrownG GreenL BlueO OrangeR RedW WhiteY YellowB/W Black/WhiteG/Y Green/Yellow

7CF-9-10-b 3/9/05 10:35 AM Page 33

Generator

LIT-19626-01-23 7CF-28199-10PRINTED ON RECYCLED PAPERPRINTED IN JAPAN05 902 – 0.4 × 1 !

EF2400iS

OWNER’S MANUAL

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