Generator

LIT-19626-01-19 7CG-28199-10PRINTED ON RECYCLED PAPERPRINTED IN JAPAN04 904 1.2 1 !

EF1000iS

OWNERS MANUAL

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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. numbersin a separate place in case your machineis stolen.

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 deal-er.

AE00002

INTRODUCTIONCongratulations 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.PRI-I.D. NUMBER

PRI-I.D.CODE SERIAL No.

EF1000iSOWNERS MANUAL

2004 by Yamaha Motor Corporation, U.S.A.1st Edition, March 2004

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-19626-01-19

MODEL

790-065b

7CG-24163-00

AE00022

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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 thereis any question concerning this manu-al, please consult your Yamaha deal-er.

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 tothe engine operator, a bystander, or aperson inspecting 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

SPARK PLUG INSPECTION.............22CARBURETOR ADJUSTMENT.........22ENGINE OIL REPLACEMENT ..........23MUFFLER SCREEN AND SPARKARRESTER .......................................24AIR FILTER........................................26FUEL TANK FILTER..........................27

TROUBLESHOOTING..........................28STORAGE.............................................30

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

EXHAUST EMISSION CONTROL SYSTEM AND COMPONENTS ............31SPECIFICATIONS ................................32

DIMENSIONS ....................................32ENGINE .............................................32GENERATOR ....................................32

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

LIMITED WARRANTY (EF- AND EDL-SERIES)..........................................1LOCATION OF IMPORTANT LABELS ..3SAFETY INFORMATION........................4

EXHAUST FUMES AREPOISONOUS .......................................4FUEL IS HIGHLY FLAMMABLE ANDPOISONOUS .......................................4ENGINE AND MUFFLER MAYBE HOT................................................4ELECTRIC SHOCK PREVENTION.....5CONNECTION NOTES .......................6CONNECTION.....................................6EXTENSION CORD NOTES ...............6

CONTROL FUNCTION ...........................7DESCRIPTION ....................................7CONTROL PANEL...............................7OIL WARNING SYSTEM.....................8ENGINE SWITCH................................8ECONOMY CONTROL SWITCH.........8DC PROTECTOR ................................9FUEL TANK CAP AIR VENT KNOB....9FUEL COCK KNOB .............................9

PRE-OPERATION CHECK...................10FUEL..................................................10ENGINE OIL ......................................11GROUND (Earth) ...............................11

OPERATION .........................................12STARTING THE ENGINE..................12APPLICATION RANGE .....................14CONNECTION...................................15STOPPING THE ENGINE .................19

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

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1

AE01120

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

Yamaha Motor Corporation, U.S.A. hereby war-rants that new Yamaha consumer generators pur-chased from an authorized Yamaha consumergenerator dealer in the continental United Stateswill be free from defects in material and workman-ship for the period of time stated herein, subject tocertain stated limitations.

THE PERIOD OF WARRANTY Any new EF-series or EDL-series Yamaha Generator pur-chased for private, non-commercial use from anauthorized Yamaha consumer generator dealer inthe continental United States will be warranted against defects in material or work-manship for a period two (2) years from date ofpurchase, subject to exclusions noted herein. AnyYamaha non-commercial generator purchased and utilized for commercialor rental 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 dealerwill, free of charge, repair or replace, at Yamahasoption, any part adjudged defective by Yamahadue to faulty workmanship or material from thefactory. Parts used in warranty repairs will be war-ranted for the balance of the products warrantyperiod. All parts replaced under warranty becomeproperty 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 CUSTOMERS RESPONSIBILITY under thiswarranty shall be to:1. Operate and maintain the generator as speci-

fied in the appropriate Owners Manual;

2. Give notice to an authorized Yamaha con-sumer generator dealer of any and all appar-ent defects within ten (10) days after discov-ery, and make the unit available at that timefor inspection and repairs at such dealersplace of business.

WARRANTY TRANSFER: To transfer the warran-ty from the original purchaser to any subsequentpurchaser(s), it is imperative that the unit beinspected and registered for warranty by an autho-rized Yamaha consumer generator dealer. In orderfor this warranty to remain in effect, this inspectionand registration must take place within ten (10)days after transfer. An inspection and registrationfee will be charged for this service. In no case willthe warranty be extended beyond the original peri-od.

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 TOYOU. ALSO EXCLUDED FROM THIS WARRANTYARE ANY INCIDENTAL OR CONSEQUENTIALDAMAGES 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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2

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 dealers 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 customers 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 Owners Manualinstead of having the dealer do them?

A. Yes, if you are a qualified mechanic and followthe procedures specified in the Owners 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 Owners 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 Owners 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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HOT EXHAUST7VV-28176-10

AE00062

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

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

WARNINGqREAD THE OWNERS MANUAL AND ALL LABELS BEFORE OPERATING.8ONLY OPERATE IN WELL-VENTILATED AREAS.EXHAUST GAS CONTAINS POISONOUS CARBON MONOXIDE.8

CHECK FOR SPILLED FUEL OR FUEL LEAKS.8STOP ENGINE BEFORE REFUELING.8DO NOT OPERATE NEAR FLAMMABLE MATERIALS.8ELECTROCUTION CAN OCCUR IF GENERATOR IS USED IN RAIN, SNOW,OR NEAR WATER.KEEP THIS UNIT DRY AT ALL TIMES.

8

ELECTROCUTION OR PROPERTY DAMAGE CAN OCCUR.DO NOT CONNECT THIS GENERATOR TO ANY BUILDINGS ELECTRICALSYSTEM UNLESS AN ISOLATION SWITCH HAS BEEN INSTALLED BY ALICENSED ELECTRICIAN. REFER TO THE OWNERS MANUAL.

8

7VV-24162-10

1

5

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)

rpmNO 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) 7VV-2179R-00

4

3

OILzzzzzz

AC output zzHz Rated zzzVA

zzzV Phase SingleDC output zzV zAFuel Gasoline

YAMAHA MOTOR CO., LTDMADE IN JAPAN

7VV-24164-10

2

STARTING INSTRUCTION8Disconnect allelectrical devices.Turn ECON. switch to OFFOpen fuel cap ventTurn fuel knob ONTurn engine switch to ONPull choke knob outPull recoil starterPush choke knob in

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8

8

8

8

8

8

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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 ashort time. Operate the engine in a well ventilatedarea.

AE01018

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

muffler 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 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.Also, be sure the fuel tank cap air vent knob istightened when transporting the generator.

4

741-081

741-082

741-083

741-084

741-085

AE01019

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.

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741-086

a

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)

5

741-087

741-088

741-089

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741-077

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AE01020

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

9 Avoid operating the engine with a dust cover.

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

1 Carrying handle

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

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

1 Lead diameter

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12

1

2

741-090

AE00088

CONNECTION NOTES9 Avoid connecting the generator to commercial

power outlet.9 Avoid connecting the generator in parallel with any

other generator.1 Correct2 Incorrect

AE00091

CONNECTIONwBefore the generator can be connected to a build-ings electrical system, a licensed electrician mustinstall an isolation (transfer) switch in the build-ings 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.

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 atough flexible rubber sheath (IEC 245) or theequivalent to withstand mechanical stresses.

6

Ground (earth) LeadDiameter:

0.12 mm (0.005 in)/ampereEX;

10 Ampere 1.2mm (0.05 in)

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AE00101

CONTROL FUNCTION

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AE00103

CONTROL PANEL1 Overload indicator light2 AC pilot light3 Oil warning light4 Engine switch (Red)5 Choke knob6 Fuel cock knob7 Ground (Earth) terminal8 Economy control switch (Black)9 DC protector0 AC receptacleq DC receptacle

AE00102

DESCRIPTION1 Fuel tank2 Fuel tank cap3 Fuel tank cap air vent knob4 Fuel cock knob5 Air filter cover6 Spark plug7 Muffler8 Choke knob9 Ground (Earth) terminal0 Oil filler capq Recoil starterw Carrying handle

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AE00111

OIL WARNING SYSTEMWhen the oil level falls below the lower level, theengine stops automatically. Unless you refill with oil,the engine will 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.

8

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700-115

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AE00939

ENGINE SWITCH (Red)The engine switch controls the ignition system.1 7 ONIgnition circuit is switched on.The engine can be started.2 5 STOPIgnition circuit is switched off.The engine will not run.AE00988

ECONOMY CONTROL SWITCH (Black)1 I ONWhen the economy control switch is turned I, theeconomy control unit controls the engine speedaccording to the connected load. The results are betterfuel consumption and less noise.

2 3 OFFWhen the economy control switch is turned 3, theengine runs at the rated r/min (5,000 r/min) regardlessof whether there is a load connected or not.

NOTE:The economy control switch must be turned to 3(OFF) when using electric devices that require a largestarting current, such as a compressor or a submergi-ble pump.

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AE01099

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 RESET2 OFF

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AE01021

FUEL TANK CAP AIR VENT KNOBThe fuel tank cap is provided with an air vent knob tostop fuel flow.The air vent knob must be turned 1 turn counterclock-wise from the tightened position. This will allow fuel toflow to the carburetor and the engine to run.When the engine is not in use, tighten the air ventknob clockwise until it is finger-tight to stop fuel flow.

1 Air vent knob2 Fuel tank cap

763-227

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707-098

OFF

ON

AE01034

FUEL COCK KNOBThe fuel cock knob is used to supply fuel from the fueltank to the carburetor.

Remove the cover 1 and the fuel cock lever can befound inside. If for some reason the fuel cock knobcannot be turned, this lever can be used to supply fuel.

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741-091

707-092

707-095

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.

AE00212

FUELMake sure there is sufficient fuel in the tank.

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.

w9 Fuel is highly flammable and poisonous.

Check SAFETY INFORMATION (See page 4)carefully 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.

10

707-091

Recommended fuel:Unleaded gasoline

Fuel tank capacity:Total: 2.5 L (0.55 Imp gal, 0.66 US gal)

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700-116

700-119

1

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AE01158

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

NOTE:Place the generator on a level surface and check theoil level of the oil filler hole.

1 Upper level

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

2 Oil filler guide

cC9 The generator has been shipped without

engine oil. Fill with oil or it will not start.9 Do not tilt the generator when adding engine

oil. This could result in overfilling and damageto the engine.

11

700-065

0C 25C

80F32F

A YAMALUBE 4(10W-30)

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

700-1262

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

type SE motor oil SAE #30 SAE #20 SAE 10W

Engine oil quantity:0.32 L (0.28 lmp qt, 0.34 US qt)

AE00241

GROUND (Earth)

Make sure to ground (earth) the generator.Check SAFETY INFORMATION on page 5.

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AE01109

OPERATIONcC9 The generator has been shipped without

engine oil. Fill with oil or it will not start.9 Do not tilt the generator when adding engine

oil. This could result in overfilling and damageto the engine.

1 Upper level

AE01104

STARTING THE ENGINE

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

electric devices.9 Turn the economy control switch (Black) to the

3 (OFF) position.

1 3 OFF

3. Turn the engine switch (Red) to the 7 (ON) posi-tion.

1 7 ON

2. Turn the fuel cock knob to the ON position.

1 ON

1. While holding the fuel tank cap so that it will notmove, turn the air vent knob 1 turn counterclock-wise to open the fuel tank air vent.

1 Air vent knob

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qON

OFF

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

4. Pull the choke knob fully out.1 Choke knob

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

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

NOTE:Grasp the carrying handle firmly to prevent the gener-ator from falling over when pulling the recoil starter.

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

701-049c

704-017

701-049b

q

NOTE:When starting the engine, with the economy controlswitch I (ON), and there is no load on the generator:9 in ambient temperature below 3C (37F), the

engine will run at the rated r/min (5,000 r/min) for5 minutes to warm up the engine.

9 in ambient temperature above 3C (37F), theengine will run at the 4,000 r/min for 3 minutes towarm up the engine.

The economy control unit operates normally after theabove time period, while the economy control switch isI (ON).

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

used by itself.9 The simultaneous usage of AC and DC power is

possible but total wattage should not exceed therated output.EX:

9 The overload indicator light 1 comes on whentotal wattage exceeds the application range. (Seepage 16 for more details.)

14

AE01000

APPLICATION RANGE

AC DC

Power factor 1 0.80.95 0.40.75(Efficiency 0.85)

EF1000iS 900W 720W 300WRated voltage

12VRated current

8A

763-225

qGenerator rated output 900VA

Frequency Power factor1.0 800W

AC0.8 640W

96WDC (12V/8A)

cCBe sure the total load is within generator rated output otherwise generator dam-age will occur.

NOTE:Some precision equipment is voltage sensitive and may require a more uniform voltagesupply than portable generators provide. Examples include some medical equipment,personal computers, and some inverters that sense peak and RMS voltage values.Consult the precision-equipment vendor before relying on any portable generator to pro-vide power to such equipment.

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AE01023

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 the economy control switch (Black) to the I (ON) position and turn on any electric devices.

1 I (ON)NOTE:The economy control switch must be turned to 3(OFF) when using electric devices that require a largestarting current, such as a compressor or a submergi-ble pump.

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763-225

qAE00953

Overload indicator lightThe overload indicator light 1 comes on when anoverload of a connected electrical device is detected,the inverter control unit overheats, or the AC outputvoltage rises. The electronic breaker will then activate,stopping power generation in order to protect the gen-erator and any connected electric devices. The ACpilot light (green) will go off and the overload indicatorlight (red) will stay on, but the engine will not stop run-ning.

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 arefound, 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 devicesthat require a large starting current, such as acompressor or a submergible pump. However, thisis not a malfunction.

16

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AE01100

Battery ChargingNOTE: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 economy control switch is turned

off while charging the battery.9 Be sure the battery leads are properly con-

nected.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 RESET2 OFF

NOTE:9 At full charge, electrolyte specific gravity is

between 1.26 and 1.28.9 Check specific gravity hourly.

17

761-079a

762-040

12

6v 6v 12v762-041

763-238a

q

w

7CG-28199-10 4/1/04 3:13 PM Page 17

762-012

wNever smoke or make and break connections atthe battery while charging. Sparks may ignite thebattery gas.Battery electrolyte is poisonous and dangerous,causing severe burns, etc. contains sulfuric (sul-phuric) acid. Avoid contact with skin, eyes orclothing.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.

18

7CG-28199-10 4/1/04 3:13 PM Page 18

19

763-222

q

761-078

763-223a

q

705-071d

q

ON

OFF

707-097a

AE01025

STOPPING THE ENGINE

NOTE:9 Turn off any electric devices.9 Turn the economy control switch (Black) to the

3 (OFF) position.

1 3 OFF

1. Disconnect any electric devices.

3. Turn the fuel cock knob to OFF.

1 OFF

4. Turn the fuel tank cap air vent knob clockwise untilit is finger-tight.

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

1 5 STOP

7CG-28199-10 4/1/04 3:13 PM Page 19

20

AE00401

PERIODIC MAINTENANCEAE00403

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.

No. Item Remarks

Pre-Ope-rationcheck(daily)

Initial Every1

monthor 20 Hr

3monthsor 50 Hr

6months

or 100 Hr

12months

or 300 HrCheck condition.

1. ** Adjust gap and 0Spark Plugclean. Replace ifnecessary.

**

Check and adjust2.* Valve Clearance when engine is 0

cold.

Check breather** hose for cracks or

03.* Crankcase damage. Replacebreather systemif necessary.

Check for leakage.Retighten or

0*replace gasket

**

if necessary.4. Exhaust System Check muffler

screen and sparkarrester. Clean/ 0replace ifnecessary.

Check oil level 05. Engine Oil

Replace 0 0

**Clean.

6. Air Filter Replace if 0necessary.

Clean fuel tank7. Fuel Filter filter. Replace if 0

necessary.

7CG-28199-10 4/1/04 3:13 PM 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.

Check fuel hose8. Fuel Line for crack or da- 0

mage. *Replaceif necessary.

9. ** Check choke 0Choke knoboperation.

10. Cooling System Check for fan 0damage.

11. Starting System Check recoil 0starter operation.

12.*** More frequently

0Decarbonization if necessary.

13. Generation Check the pilot 0light comes on.Check all fittings

14.* Fittings/ and fasteners. 0Fasteners Correct ifnecessary.

No. Item Remarks

Pre-Ope-rationcheck(daily)

Initial Every1

monthor 20 Hr

3monthsor 50 Hr

6months

or 100 Hr

12months

or 300 Hr

7CG-28199-10 4/1/04 3:13 PM Page 21

22

760-024

760-025q

2. Check for discoloration and remove the carbon.

3. Check the spark plug type and gap.

a Gap

4. Install the spark plug.

5. Install the cover.

a

760-001a

Standard electrode color:Tan Color

Standard Spark Plug:CR4HSB (NGK)

Spark Plug Gap:0.60.7 mm (0.0240.028 in)

Spark Plug Torque:12.5 Nm (1.25 kgfm, 9 lbfft)

AE00431

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.

AE01026

SPARK PLUG INSPECTIONYou should periodically remove and inspect the sparkplug.1. Remove the cover 1.

7CG-28199-10 4/1/04 3:13 PM Page 22

7. Add engine oil to the upper level of the filler holeusing the oil filler guide.

6 Oil filler guide

cCDo not tilt the generator when adding engine oil.This could result in overfilling and damage to theengine.

23

3

4

700-124

700-118b

5

700-120

700-126a6

AE01159

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

up the engine for several minutes.Then stop the engine and turn the fuel cock knobto OFF. Turn the fuel tank cap air vent knobclockwise.

2. Loosen the screw 1 and remove the cover 2.3. Remove the oil drain joint 3 pushing downward

from the bottom of the generator and remove theoil filler cap 4.

4. Attach the oil drain joint 5 to the oil filler hole.

788-009

q

w

5. Place an oil pan under the engine. Tilt the genera-tor to drain the oil completely.

6. Replace the generator on a level surface andremove the oil drain joint.

700-065

0C 25C

80F32F

A YAMALUBE 4(10W-30)

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

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

type SE motor oil SAE #30 SAE #20 SAE 10W

Engine oil quantity: 0.32 L (0.28 lmp qt, 0.34 US qt)

7CG-28199-10 4/1/04 3:13 PM Page 23

24

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

711-068

q

711-069

3

2

AE01028

MUFFLER SCREEN AND SPARK ARRESTERwThe 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.

741-091

2. Remove the muffler screen.

2 Muffler screen3 Screw

700-117a

788-010

8. Wipe the oil drain joint clean, and wipe up anyspilled oil.

cCBe sure no foreign material enters the crankcase.

9. Install the oil filler cap.10. Replace the oil drain joint in its original position.11. Install the cover and tighten the screw.

7CG-28199-10 4/1/04 3:13 PM Page 24

25

711-050

711-071a21

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

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

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

711-069a

4. Remove the spark arrester.

4 Spark arrester

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.

711-070

711-022

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

711-071

4

7CG-28199-10 4/1/04 3:13 PM Page 25

3. Remove the air filter cover and element 4.4. Wash the element in solvent and dry.5. Oil the element and squeeze out excess oil.

The element should be wet but not dripping.

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

6. Insert the element into the air filter.NOTE:Be sure the element sealing surface matches the airfilter so there is no air leak.

26

710-059a

r

AE01029

AIR FILTER1. Remove the cover 1.

2. Remove the clip 2 holding the air filter cover 3.

Recommended oil:Foam-air-filter oil

orSAE #20 motor oil

788-001

q

788-002a

e

w

711-068a

9. Install the cover.

7CG-28199-10 4/1/04 3:13 PM Page 26

27

707-094

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.

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.

7. Replace the air filter cover in its original positionand install the clip.

8. Install the cover.

7CG-28199-10 4/1/04 3:13 PM Page 27

28

707-091

AE01097

TROUBLESHOOTING

Engine wont start1. Fuel systems

No fuel supplied to combustion chamber.2 No fuel in tank .... Supply fuel.2 Fuel in tank .... Fuel tank cap air vent knob to

OPEN (turn it 1 turn counterclockwise). Fuel cock knob to ON.

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

705-072

ON

OFF

700-006

763-223b

760-009

AE00785

Generator wont 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. Engine oil systemInsufficient

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

3. Electrical systems2 Engine switch (Red) to ON.

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

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

4. CompressionInsufficient

2 Worn out piston and cylinder .... Consult dealer.

7CG-28199-10 4/1/04 3:13 PM 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 asfar way as possible from thespark plug hole and carburetorarea.

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 OKReplace orAdjust Gap.

Clean the sparkplug.

E Check engine oil level.

F OK G Level lowConsult aYamaha dealer. Add engine oil.

7CG-28199-10 4/1/04 3:13 PM Page 29

30

706-025

788-001

q

707-103

w

712-026

AE00601

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

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.

AE01095

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

fuel tank into an approved gasoline containerusing a commercially available hand siphon.Then, install the fuel tank cap.

w9 Fuel is highly flammable and poisonous.

Check SAFETY INFORMATION (See page 4)carefully.

9 Wipe up any spilled fuel immediately.

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

3. Turn the fuel cock knob to OFF.Start the engine and leave it run until it stops.This will burn any remaining fuel in the carburetor.

7CG-28199-10 4/1/04 3:13 PM 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 accordancewith U.S. EPA REGULATIONS FOR NEW NONROAD SPARK-IGNITIONNONHANDHELD ENGINES and the CALIFORNIA REGULATIONS FOR 1995AND LATER SMALL OFF-ROAD ENGINES.The acronyms conform to the latest version of the SAEs recommended prac-tice document J1930, Diagnostic Acronyms, Terms, and Definitions ForElectrical/Electronic System.

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

7CG-28199-10 4/1/04 3:13 PM Page 31

32

Unit EF1000iSType Forced air cooled 4-stroke gasoline OHVCylinder Arrangement Vertical 1 cylinderDisplacement cm3 50Bore Stroke mm (in) 41.0 38.0 (1.61 1.50)Rated Output kW(HP)/r/min 1.21 (1.67)/5,000Operation Hours at rated operation Hr 4.3Fuel Unleaded gasolineFuel Tank Capacity L (Imp gal, US gal) 2.5 (0.55, 0.66)Engine Oil Quantity L (Imp qt, US qt) 0.32 (0.28, 0.34)Ignition System TCISpark Plug: Type CR4HSB (NGK)Spark Plug: Gap mm (in) 0.60.7 (0.0240.028)Noise Level* dB (A) 57

Unit EF1000iSAC Output

Rated Voltage V 120Rated frequency Hz 60Rated current A 7.5Rated Output VA 900Safty Device: Type Electronic

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

Unit EF1000iSOverall Length mm (in) 450 (17.7)Overall Width mm (in) 240 (9.4)Overall Height mm (in) 380 (15.0)Dry Weight kg (lb) 12.7 (28.0)

AE00701

SPECIFICATIONSAE00702

DIMENSIONS

AE00704

ENGINE

AE00707

GENERATOR

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

7CG-28199-10 4/1/04 3:13 PM Page 32

33

770-044f

W

W

W

WW

WWBrBrBr

Br

BrBrBrWWW

BrBrBr

BrBrWWW

WWW

WWW

R

RR

Br

R

Br

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W W L L

L

L

L Y B

B

B B B

B

B

B

B

B

R

R

R

RLL

L L

GGYY

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RL

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B/W

B/WB/W

B/W

B/W

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B/W

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uuy

AE00751

WIRING DIAGRAM

1 Main coil2 Sub coil3 DC coil4 DC rectifier5 Control unit6 AC pilot light7 AC receptacle8 Ground (Earth) terminal9 Economy control switch0 Overload indicator lightq DC protector (breaker)

w DC receptaclee Engine switchr Oil warning lightt Speed limitery Oil level gaugeu Ignition coili Spark plugo TCI unitp TCI magnetoa Stepping motor

Color codeB BlackBr BrownG GreenGy GrayL BlueO OrangeR RedW WhiteY YellowB/W Black/WhiteG/Y Green/Yellow

7CG-28199-10 4/1/04 3:13 PM Page 33

Generator

LIT-19626-01-19 7CG-28199-10PRINTED ON RECYCLED PAPERPRINTED IN JAPAN04 904 1.2 1 !

EF1000iS

OWNERS MANUAL

7CG-28199-10 hyoshi 3/22/04 4:51 PM Page 1

EF100iS Owner's ManualIntroductionContentsYamaha Motor Corporation, USA EF and EDL Series Generator Limited WarrantyLocation of Important LabelsSafety InformationExhaust fumes are poisonousFuel is highly flammable and poisonousEngine and muffler may be hotElectric shock preventionConnection notesConnectionExtension cord notes

Control FunctionDescriptionControl panelOil warning systemEngine switchEconcmy control switch (black)DC ProtectorFuel tank cap air vent knobFuel cock knob

Pre-Operation CheckFuelEngine oilGround (earth)

OperationStarting the engineApplication rangeConnectionStopping the engine

Periodic ManitenanceMaintenance chartSpark plug inspectionCarburetor adjustmentEngine oil replacementMuffler screen and spark arresterAir filterFuel tank filter

TroubleshootingStorageDrain the fuelEngine

Exhaust Emission Control System and ComponentsSpecificationsWiring diagram