Yamaha generator User Manual

OWNER’S MANUAL

Read this manual carefully before operating this machine.

Generator

EF2000iS

LIT-19626-01-53

7DK-28199-10

Read this manual carefully befor operating this machine.This manual should

stay with this machine if it is sold.

AE00002

INTRODUCTION

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

AE00022

EF2000iS

OWNER’S MANUAL

© 2009 by Yamaha Motor Corporation, U.S.A.

1st Edition, January 2009

All rights reserved.

Any reprinting or unauthorized use

without the written permission of

Yamaha Motor Corporation, U.S.A.

is expressly prohibited.

Printed in Japan

P/N LIT-19626-01-53

NOTICE

WARNING

WARNING

IMPOTANT MANUAL INFORMATION

Particularly important information is distin­guished in this manual by the following
notations.

This is the safety alert symbol. It is
used to alert you to potential personal
injury hazards. Obey all safety mes­sages that follow this symbol to avoid
possible injury or death.

A WARNING indicates a hazardous situ­ation which, if not avoided, could result
in death or serious injury.

A NOTICE indicates special precau­tions that must be taken to avoid dam­age to the machine or other property.

TIP

A TIP provides key information to make
procedures easier or clearer.

AE00032

PLEASE READ AND UNDERSTAND
THIS MANUAL COMPLETELY BEFORE
OPERATING THE MACHINE.

TIP

9 Yamaha continually seeks advance-

9 This manual should be considered a

ments in product design and quality.
Therefore, while this manual contains
the most current product information
available at the time of printing, there
may be minor discrepancies between
your engine and this manual. If there is
any question concerning this manual,
please consult a Yamaha dealer.

permanent part of this engine and
should remain with this engine when
resold.

* Product and specifications are subject to

change without notice.

AE00041

CONTENTS

SAFETY INFORMATION.........................1

EXHAUST FUMES ARE

POISONOUS........................................1

FUEL IS HIGHLY FLAMMABLE AND

POISONOUS........................................1

ENGINE AND MUFFLER MAY BE

HOT ......................................................1

ELECTRIC SHOCK PREVENTION .....2

CONNECTION NOTES........................3

CONNECTION .....................................3

EXTENSION CORD NOTES................3

LOCATION OF IMPORTANT

LABELS...................................................4

DESCRIPTION ........................................6

Control Panel........................................6

CONTROL FUNCTION............................7

Engine switch .......................................7

Oil warning light (Red)..........................7

DC protector .........................................7

Economy control switch........................8

AC pilot light (Green)............................8

Overload indicator light (Red) ..............9

Fuel tank cap........................................9

Fuel tank cap air vent knob................10

Fuel cock knob ...................................10

Ground (Earth) terminal .....................10

Twin Tech ............................................10

PREPARATION .....................................11

Fuel.....................................................11

Engine oil............................................12

PRE-OPERATION CHECK ...................13

Pre-operation check ...........................13

OPERATION ..........................................14

Starting the engine .............................14

Stopping the engine ...........................16

Connection .........................................17

Battery charging .................................18

Application range................................20

PERIODIC MAINTENANCE..................21

Maintenance chart..............................21

Spark plug inspection .........................23

Carburetor adjustment........................24

Engine oil replacement.......................24

Air filter ...............................................26

Muffler screen and spark arrester ......27

Fuel tank filter.....................................29

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

Drain the fuel ......................................30

Engine ................................................32

TROUBLESHOOTING...........................33

Engine won’t start...............................33

Generator won’t produce power.........34

SPECIFICATIONS .................................36

Dimensions.........................................36

Engine ................................................36

Generator ...........................................36

CONSUMER INFORMATION ................37

Identification number records .............37

Machine identification.........................37

LIMITED WARRANTY (EF- AND

EDL-SERIES) ........................................38

EXHAUST EMISSION CONTROL

SYSTEM AND COMPONENTS .........40

WIRING DIAGRAM ...............................41

7DK-001

7DK-002

7DK-003

AE00071

SAFETY INFORMATION

AE00072

EXHAUST FUMES ARE POISONOUS

9 Never operate the engine in a closed area or it may

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

AE00075

FUEL IS HIGHLY FLAMMABLE AND
POISONOUS

9 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 refueling.

9 If you swallow any fuel, inhale fuel vapor, or allow

any to get in your eye(s), see your doctor immedi­ately. If any fuel spills on your skin or clothing,
immediately wash with soap and water and change
your clothes.

9 When operating or transporting the machine, be

sure it is kept upright. If it tilts, fuel may leak from
the carburetor or fuel tank.

7DK-004

AE00843

ENGINE AND MUFFLER MAY BE HOT

9 Place the machine in a place where pedestrians or

children are not likely to touch the machine.

7DK-005

9 Avoid placing any flammable materials near the

exhaust outlet during operation.

7DK-006

– 1 –

7DK-007

a

7DK-008a

1

7DK-036

9 Keep the machine at least 1 m (3 ft) from buildings

or other equipment, or the engine may overheat.

a 1 m (3 ft)

9 Do not operate the engine with a dust cover or

other objects covering it.

9 When covering the generator, be sure to do so only

after the engine and muffler have completely
cooled down.

9 Be sure to carry the generator only by its carrying

handles 1.

9 Do not place any obstacles on the generator.

AE00083

ELECTRIC SHOCK PREVENTION

9 Never operate the engine in rain or snow.

7DK-009

9 Never touch the machine with wet hands or electri-

cal shock will occur.

7DK-010

– 2 –

7DK-012

1

2

1

2

WARNING

9 Connect the ground lead of the machine to the

1

7DK-011

ground (Earth) terminal 1 and connect the end to
the ground electrode buried in the ground.

AE00088

CONNECTION NOTES

9 Avoid connecting the generator to commercial

power outlet.

9 Avoid connecting the generator in parallel with any

other generator.

1 Correct
2 Incorrect

AE00091

CONNECTION

Before the generator can be connected to a build­ing’s electrical system, a licensed electrician must
install an isolation (transfer) switch in the build­ing’s main fuse box. The switch is the connection
point for generator power and allows selection of
generator or main line power to the building. This
will prevent the generator from charging the main
power line (backfeeding) when the main power sup­ply has failed or has been turned off for line repair.
Backfeeding can electrocute or injure line mainte­nance personnel. Also, generator and building
electrical system damage can occur when normal
operating power returns if unit is used without an
isolation switch.

AE00086

EXTENSION CORD NOTES

Extension cords should be protected by a tough flexible
rubber sheath (IEC 245) or the equivalent to withstand
mechanical stresses.

– 3 –

AE00062

DANGER

Using 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.

1

2

7DK-013

3

4

5

6

7DK-014

LOCATION OF IMPORTANT LABELS

Please read the following labels carefully before oper­ating this machine.

TIP

Maintain or replace safety and instruction labels, as
necessary.

1

– 4 –

2

WARNING

q

8

Read the owner’s manual and all labels before operating.

8

Only operate in well-ventilated areas. Exhaust gas contains poisonous carbon monoxide.

8

Check for spilled fuel or fuel leaks.

8

Stop engine before refueling.

8

Do not operate near flammable materials.

8

Electrocution 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 building’s electrical
system unless an isolation switch has been installed by a licensed electrician. Refer to the owner’s manual.

8

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.

7DK-24162-10

Important Emissions Information The air index of this engine is 3

(California only)

MOST CLEAN LEAST CLEAN

0246810

YAMAHA MOTOR POWERED PRODUCTS CO.,LTD.

This engine meets **** California exhaust and evaporative
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)
EF: ********* DISPLACEMENT: *** cc
EVAP F: ******** EMISSION CONTROL SYSTEM: EM
This engine is certified to operate on unleaded gasoline.
ENGINE OIL: SAE10W-30 TYPE: SE
No other adjustments needed.

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

Check owner's manual for further details.

MODERATE
(*** HOURS)

INTERMEDIATE
(*** HOURS)

EXTENDED
(*** HOURS)

X

HOT EXHAUST

7WL-28176-10

NOTICE

Use the specified spark plug only.

Specified plug:BPR6HS(NGK)

7DK-24164-10

OIL

EF2000IS

YAMAHA MOTOR POWERED PRODUCTS CO.,LTD.

MADE IN JAPAN

AC output 60Hz
Rated 1.6kVA

120V

Phase

Single

DC output

12V 8A

Fuel

Gasoline

3

5

6

4

– 5 –

1

2

3

4

7DK-015

123 45

7DK-017

5

6

7

7DK-016

DESCRIPTION

1 Carrying handle
2 Fuel tank cap air vent knob
3 Fuel tank cap
4 Recoil starter
5 Fuel gauge
6 Muffler
7 Oil filler cap

w

0q

6

7
8

9

AE00103

Control panel

1 Oil warning light
2 AC pilot light
3 Overload indicator light
4 Economy control switch

(Black)

5 Engine switch (Red)
6 Fuel cock knob
7 Choke knob
8 Twin Tech (parallel running

terminal)

9 AC receptacle
0 DC protector (breaker)
q Ground (Earth) terminal
w DC receptacle

– 6 –

1

2

7DK-018

AE00101

1

2

7DK-052

CONTROL FUNCTION

AE00121

Engine switch

The 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.

AE00111

Oil warning light (Red)

When the oil level falls below the lower level, the oil
warning light comes on and then the engine stops auto­matically. Unless you refill with oil, the engine will not
start again.

TIP

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

700-115

DC protector

The DC protector turns off 2 automatically when elec­tric device being connected to the generator is operat­ing and current above the rated flows. To use this equip­ment again, turn on the DC protector by pressing its
button to “ON” 1.

1 “ON”

Direct current is output. (This is the default position.)

2 “OFF”

Direct current is not output.

– 7 –

1

2

7DK-020

Reduce the load of the connected electric device

NOTICE

below the specified rated output of the generator if
the DC protector turns off. If the DC protector turns
off again, stop using the device immediately and
consult a Yamaha dealer.

AE00142

Economy control switch

1 I “ON”

When the economy control switch is turned to “ON” 1,
the economy control unit controls the engine speed
according to the connected load. The results are better
fuel consumption and less noise.

2 3 “OFF”

When the economy control switch is turned to “OFF” 2,
the engine runs at the rated r/min (4,500 r/min) regard­less of whether is a load connected or not.

TIP

The economy control switch must be turned to “OFF” 2
when using electric devices that require a large starting
current, such as a compressor of a submergible pump.

AC pilot light (Green)

The AC pilot light 1 comes on when the engine starts
and produces power.

1

7DK-048

– 8 –

AE01087

1

7DK-021

Overload indicator light (Red)

The overload indicator light 1 comes on when an over­load of a connected electrical device is detected, the
inverter control unit overheats, or the AC output voltage
rises. Then, the AC protector will trip, stopping power
generation in order to protect the generator and any
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 power
generation 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 rated output.

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.

TIP

The overload indicator light may come on for a few sec­onds at first when using electric devices that require a
large starting current, such as a compressor or a sub­mergible pump. However, this is not a malfunction.

Fuel tank cap

Remove the fuel tank cap by turning it counterclock­wise.

7DK-022

– 9 –

1

2

7DK-023

7DK-042a

Fuel tank cap air vent knob

The fuel tank cap 2 is provided with an air vent knob
1 to stop fuel flow.

The air vent knob must be turned to “ON”. This will
allow fuel to flow to the carburetor and the engine to
run. When the engine is not in use, turn the air vent
knob to “OFF” to stop fuel flow.

2

1

Fuel cock knob

The fuel cock supplies fuel from the fuel tank to the car­buretor.
The fuel cock has two positions.

1 “ON”

7DK-024

With the knob in this position, fuel flows to the carbure­tor. Normal using is done with the knob in this position.

2 “OFF”

With the knob in this position, fuel will not flow. Always
turn the knob to this position when the engine is not
running.

Ground (Earth) terminal

Ground (Earth) terminal 1 connects the earth line for
prevention of electric shock.
When the electric device is earthed, always the gener-

1

7DK-011

ator must be earthed.

Twin Tech
(Terminal for Connecting special cables for
parallel running)

This is the terminal for connecting special cables for
parallel running of two EF2000iS. The parallel running
requires two EF2000iS and the special cables. (The
rated output in parallel running is 3.0 kVA and the rated
current is 25.0 A.)
The handling, operation procedure and the notes on
usage are described in the PARALLEL RUNNING KIT
OWNER’S MANUAL included in the Parallel Running
Kit. Consult a Yamaha dealer for this Parallel Running
Kit.

– 10 –

7DK-026

7DK-091

NOTICE

WARNING

707-095

PREPARATION

AE00856

Fuel

9 Fuel is highly flammable and poisonous. Check

“SAFETY INFORMATION” (See page 1) careful-
ly before filling.

9 Do not overfill the fuel tank, otherwise it may

overflow when the fuel warms up and expands.

9 After fill the fuel, make sure the fuel tank cap is

tightened securely.

9 Immediately wipe off spilled fuel with a clean,

dry, soft cloth, since fuel may deteriorate paint­ed surfaces or plastic parts.

9 Use only unleaded gasoline. The use of leaded

gasoline will cause severe damage to internal
engine parts.

Remove the fuel tank cap and fill the fuel into the tank

2

up to the red level 2.
The fuel level in the fuel tank can be checked through
the fuel level gauge 1.

1

7DK-037

3

1 Fuel level gauge
2 Red line
3 Fuel level

Recommended fuel:

Unleaded gasoline

Fuel tank capacity:

Total:

7DK-028

4.2 L (1.11 US gal, 0.92 Imp gal)

4 “F” Full
5 “E” Empty

4

5

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

7DK-093

or higher.

– 11 –

7DK-031

1

AE00222

NOTICE

1

2

7DK-030

Engine oil

The generator has been shipped without engine oil.
Do not start the engine till fill with the sufficient
engine oil.

1. Place the generator on a level surface.

2. Remove the screws 1, and then remove the cover

2.

3. Remove the oil filler cap 1.

4. Fill the specified amount of the recommended
engine oil, and then install and tighten the oil filler
cap.

0°C

å

YAMALUBE 4 (10W-40)

∂

SAE 10Wç SAE #20∫ SAE #30

32°F

25°C

80°F

7DK-033

1

700-119

1 Upper level

Recommended engine oil:

å

YAMALUBE 4 (10W-40),
SAE 10W-30 or 10W-40

∫

SAE #30

ç

SAE #20

∂

SAE 10W

Recommended engine oil grade:

API Service SE type or higher

Engine oil quantity:

0.4 L (0.42 US qt, 0.35 lmp qt)

5. Install the cover and tighten the screws.

– 12 –

AE00845

WARNING

PRE-OPERATION CHECK

If any item in the Pre-operation check is not work­ing properly, have it inspected and repaired before
operating the generator.

The condition of a generator is the owner's responsibil­ity. Vital components can start to deteriorate quickly
and unexpectedly, even if the generator unused.

TIP

Pre-operation checks should be made each time the
generator is used.

Pre-operation check

Fuel (See page 11)

9 Check fuel level in fuel tank.
9 Refuel if necessary.

Fuel line

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

Engine oil (See page 12)

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 by
use

9 Check operation.
9 If necessary, consult a Yamaha dealer.

– 13 –

7DK-047

AE00846

NOTICE

WARNING

1

7DK-034

OPERATION

9 Never operate the engine in a closed area or it

may cause unconsciousness and death within
a short time. Operate the engine in a well venti­lated area.

9 Before starting the engine, do not connect any

electric devices.

The generator has been shipped without engine oil.
Do not start the engine till fill with the sufficient
engine oil.

Starting the engine

1. Turn the economy control switch (Black) to “OFF”

1.

1 3 “OFF”

2. While holding the fuel tank cap so that it will not
move, turn the air vent knob to “ON” 1.

1

7DK-035

1

7DK-038

1 Air vent knob

3. Turn the fuel cock knob to “ON” 1.

1 “ON”

4. Turn the engine switch (Red) to “ON” 1.

1 7 “ON”

1

7DK-039

– 14 –

5. Pull the choke knob 1 fully out.

7DK-042

1

1 Choke knob

TIP

The choke is not required to start a warm engine.

7DK-040

Push the choke knob in to the original position.

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

TIP

Grasp the carrying handle firmly to prevent the genera-

7DK-041

tor from falling over when pulling the recoil starter.

7. After the engine starts, warm up the engine until
the engine does not stop when the choke knob is
returned to the original position.

TIP

When starting the engine, with the economy control
switch “ON”, and there is no load on the generator:

9 in ambient temperature below 0°C (32°F), the

engine will run at the rated r/min (4,500 r/min) for 5
minutes to warm up the engine.

9 in ambient temperature below 5°C (41°F), the

engine will run at the 4,500 r/min for 3 minutes to
warm up the engine.

The economy control unit operates normally after the
above time period, while the economy control switch is

“ON”.

– 15 –

1

7DK-034

7DK-047

AE01025

Stopping the engine

TIP

Turn off any electric devices.

1. Turn the economy control switch (Black) to “OFF”

1.

1 3 “OFF”

2. Disconnect any electric devices.

3. Turn the engine switch (Red) to “STOP” 1.

1 5 “STOP”

1

7DK-044

4. Turn the fuel cock knob to “OFF” 1.

1

7DK-045

1 “OFF”

5. Turn the fuel tank cap air vent knob to “OFF” 1
after the engine has completely cooled down.

1

7DK-092

– 16 –

AE00839

NOTICE

WARNING

7DK-043

Connection

Alternating Current (AC)

Be sure any electric devices are turned off before
plugging them in.

9 Be sure all electric devices including the lines

and plug connections are in good condition
before connection to the generator.

9 Be sure the total load is within generator rated

output.

9 Be sure the receptacle load current is within

receptacle rated current.

TIP

Make sure to ground (Earth) the generator.
When the electric device is earthed, always the gener­ator must be earthed.

1. Start the engine.

2. Plug in to AC receptacle.

3. Make sure the AC pilot light 1 is on.

1 AC pilot light

1

7DK-048

4. Turn the economy control switch to “ON” 1.

1 I “ON”

5. Turn on any electric devises.

TIP

1

7DK-049

The economy control switch must be turned to “OFF” to
increase engine speed to rated rpm.

– 17 –

Battery Charging

NOTICE

762-040

1

2

TIP

9 The generator DC rated voltage is 12V.
9 Start the engine first, and then connect the gener-

ator to the battery for charging.

9 Before starting to charge the battery, make sure

that the DC protector is turned on.

1 Red wire
2 Black wire

1. Start the engine.

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

3. Connect the black battery charger lead to the neg­ative (-) battery terminal.

4. Turn the economy control switch off to start battery
charging.

6v 6v

12v

762-041

9 Be sure the economy control switch is turned

off while charging the battery.

9 Be sure to connect the red battery charger lead

to the positive (+) battery terminal, and connect
the black lead to the negative (-) battery termi­nal. Do not reverse these positions.

9 Connect the battery charger leads to the bat-

tery terminals securely so that they are not dis­connected due to engine vibration or other dis­turbances.

9 Charge the battery in the correct procedure by

following instructions in the owner’s manual
for the battery.

9 The DC protector turns off 2 automatically if

current above the rated flows during battery

1

2

7DK-052

charging.

To restart charging the battery, turn the DC pro-

tector on by pressing its button to “ON” 1.If
the DC protector turns off again, stop charging
the battery immediately and consult a Yamaha
dealer.

1 “ON”
2 “OFF”

– 18 –

762-012

TIP

WARNING

9 Follow instructions in the owner’s manual for the

battery to determine the end of battery charging.

9 Measure the specific gravity of electrolyte to deter-

mine if the battery is fully charged. At full charge,
the electrolyte specific gravity is between 1.26 and

1.28.

9 It is advisable to check the specific gravity of the

electrolyte at least once every hour to prevent over­charging the battery.

Never smoke or make and break connections at the
battery while charging. Sparks may ignite the bat­tery gas.
Battery electrolyte is poisonous and dangerous,
causing severe burns, etc. contains sulfuric (sul­phuric) acid. Avoid contact with skin, eyes or cloth­ing.
Antidote:
EXTERNAL-Flush with water.
INTERNAL-Drink large quantities of water or milk.
Follow with milk of magnesia, beaten egg or veg­etable oil. Call physician immediately.
EYES: Flush with water for 15 minutes and get
prompt medical attention. Batteries produce explo­sive gases. Keep sparks, flame, cigarettes, etc.,
away. Ventilate when charging or using in closed
space. Always cover eyes when working near bat­teries. KEEP OUT OF REACH OF CHILDREN.

– 19 –

AE00812

NOTICE

1

7DK-021

Application range

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

AC

Power factor 1 0.8–0.95

EF2000iS –1,600W –1,280W –544W

0.4–0.75

(Efficiency 0.85)

TIP

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 the
rated output.
EX:

Generator rated output 1,600VA

Frequency Power factor

AC

DC —

1.0 –1,500W

0.8 –1,180W

9 The overload indicator light 1 comes on when

total wattage exceeds the application range. (See
page 9 for more details.)

DC

Rated voltage

12V

Rated current

8A

96W

(12V/8A)

9 Do not overload. The total load of all electrical appliances must not exceed the

supply range of the generator. Overloading will damage the generator.

9 When supplying precision equipment, electronic controllers, PCs, electronic

computers, microcomputerbased equipment or battery chargers, keep the gen­erator a sufficient distance away to prevent electrical interference from the
engine. Also ensure that electrical noise from the engine does not interfere
with any other electrical devices located near the generator.

9 If the generator is to supply medical equipment, advice should first be obtained

from the manufacturer, a medical professional or hospital.

9 Some electrical appliances or general-purpose electric motors have high start-

ing currents, and cannot therefore be used, even if they lie within the supply
ranges given in the above table. Consult the equipment manufacturer for fur­ther advice.

– 20 –

AE00401

NOTICE

WARNING

WARNING

PERIODIC MAINTENANCE

Safety is an obligation of the owner. Periodic inspection, adjustment and lubrication will
keep your generator in the safest and most efficient condition possible. The most impor­tant points of generator inspection, adjustment, and lubrication are explained on the fol­lowing pages.

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

AE00403

Maintenance chart

Stop the engine before starting maintenance work.

Use only Yamaha specified genuine parts for replacement. Ask an authorized
Yamaha dealer for further attention.

Pre-

Item Routine

Spark plug

Fuel • Check fuel level and leakage. 1

Fuel hose • Check fuel hose for cracks or damage.

Engine oil

Air filter element

Muffler screen

Spark arrester

Fuel filter • Clean and replace if necessary. 1

• Check condition.

• Clean and replace if necessary.

Replace if necessary.

• Check oil level in engine. 1

• Replace 1(*1)

• Check condition.

• Clean

• Check condition.

• Clean and replace if necessary.

• Check condition.

• Clean and replace if necessary.

– 21 –

operation

check

1

Every

6 months
or 100 Hr

1

1(*2)

1

1

12 months

or 300 Hr

Item Routine

Crankcase breather

hose

Cylinder head

Pre-

operation

check

• Check breather hose for cracks or

damage. 1

• Replace if necessary.

• Decarbonize cylinder head.

• More frequently if necessary.

6 months

or 100 Hr

Every

12 months

or 300 Hr

★

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

*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 service.

– 22 –

4

3

7DK-053

a

760-001a

Spark plug inspection

1

2

7DK-030

The spark plug is important engine components, which
should be checked periodically.

1. Remove the screws 1, and then remove the cover

2.

2. Remove the spark plug cap 3 and cap 4, and
insert the tool 5 through the hole from the outside
of the cover.

6

5

7DK-054

3. Insert the handlebar 6 into the tool 5 and turn it
counterclockwise to remove the spark plug.

4. Check for discoloration and remove the carbon.
The porcelain insulator around the center elec­trode of spark plug should be a medium-to-light tan
color.

5. Check the spark plug type and gap a.

Standard Spark Plug:

BPR6HS (NGK)

Spark Plug Gap a:

0.6–0.7 mm (0.024–0.028 in)

TIP

The spark plug gap should be measured with a wire
thickness gauge and, if necessary, adjusted to specifi­cation.

– 23 –

6. Install the spark plug.

1

2

7DK-030

WARNING

7DK-031

1

Spark Plug Torque:

20.0 N•m (2.0 kgf•m, 14.8 lbf•ft)

TIP

If a torque wrench is not available when installing a
spark plug, a good estimate of the correct torque is 1/4­1/2 turn past finger tight. However, the spark plug
should be tightened to the specified torque as soon as
possible.

7. Install the spark plug cap and cap.

8. Install the cover and tighten the screws.

AE00431

Carburetor adjustment

The carburetor is a vital part of the engine. Adjusting
should be left to a Yamaha dealer with the professional
knowledge, specialized data, and equipment to do so
properly.

AE00412

Engine oil replacement

Avoid draining the engine oil immediately after
stopping the engine. The oil is hot and should be
handled with care to avoid burns.

1. Place the generator on a level surface and warm
up the engine for several minutes.
Then stop the engine and turn the fuel cock knob,
fuel tank cap air vent knob to “OFF”.

2. Remove the screws 1 and then remove the cover

2.

3. Remove the oil filler cap 1.

– 24 –

NOTICE

7DK-055

700-006a

q

0°C

NOTICE

å

YAMALUBE 4 (10W-40)

∂

SAE 10Wç SAE #20∫ SAE #30

25°C

7DK-033

4. Place an oil pan under the engine. Tilt the genera­tor to drain the oil completely.

5. Replace the generator on a level surface.

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

6. Add engine oil to the upper level 1.

Recommended engine oil:

å

YAMALUBE 4 (10W-40),
SAE 10W-30 or 10W-40

∫

SAE #30

ç

SAE #20

∂

SAE 10W

Recommended engine oil grade:

API Service SE type or higher

Engine oil quantity:

0.4 L (0.42 US qt, 0.35 lmp qt)

32°F

80°F

7. Wipe the cover clean, and wipe up any spilled oil.

Be sure no foreign material enters the crankcase.

8. Install the oil filler cap.

9. Install the cover 2 and tighten the screws 1.

1

2

7DK-030

– 25 –

AE01084

1

2

7DK-030

NOTICE

NOTICE

Air filter

1. Remove the screws 1, and then remove the cover

2.

2

2. Remove the screw 1 and then remove the air filter
case cover 2.

1

7DK-061

3. Remove the foam element 1.

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

5. Oil the foam element and squeeze out excess oil.

1

The foam element should be wet but not dripping.

Recommended oil:

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

Do not wring out the foam element when squeezing
it. This could cause it to tear.

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

TIP

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

7DK-062

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

7. Install the air filter case cover in its original position
and tighten the screw.

8. Install the cover and tighten the screws.

– 26 –

7DK-026

AE01075

WARNING

Muffler screen and spark arrester

The engine and muffler will be very hot after the
engine has been run.
Avoid touching the engine and muffler while they
are still hot with any part of your body or clothing
during inspection or repair.

2

1

7DK-066

1. Remove the screws 1, and then pull outward on
the areas of the cover 2 shown.

1

2. Loosen the bolt 1 and then remove the muffler cap

2

1

3

7DK-063

7DK-064

4

2, the muffler screen 3 and spark arrester 4.

7DK-065

– 27 –

2

1

7DK-065a

3. Remove the carbon deposits on the muffler screen

NOTICE

711-075

and spark arrester using a wire brush.

When cleaning, use the wire brush lightly to avoid
damaging or scratching of the muffler screen and
spark arrester.

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

5. Install the spark arrester.

TIP

Align the spark arrester projection 1 with the hole 2 in
the muffler pipe.

6. Install the muffler screen and the muffler cap.

7. Install the cover and tighten the screws.

7DK-068

– 28 –

7DK-069

1

AE00471

WARNING

WARNING

Fuel tank filter

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

1. Remove the fuel tank cap and filter 1.

2. Clean the filter with gasoline.
If damaged, replace it.

3. Wipe the filter and install it.

4. Install the fuel tank cap.

Be sure the fuel tank cap is tightened securely.

– 29 –

AE00601

1

7DK-044

NOTICE

WARNING

1

7DK-038

STORAGE

Long term storage of your machine will require some
preventive procedures to guard against deterioration.

AE01056

Drain the fuel

1. Turn the engine switch to “STOP” 1.

2. Remove the fuel tank cap. Extract the fuel from the
fuel tank into an approved gasoline container using
a commercially available handsiphon. Then, install
the fuel tank cap.

Fuel is highly flammable and poisonous. Check
“SAFETY INFORMATION” (See page 1) carefully.

7DK-025

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

3. Turn the engine switch to “ON” 1.

1

7DK-039

1

4. Turn the fuel tank cap air vent knob and fuel cock
knob to “ON” 1.

7DK-035

5. Start the engine and leave it run until it stops.
The engine stops in approx. 20 mins. time by run­ning out of fuel.

TIP

9 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.

– 30 –

6. Remove the screws 1, and then remove the cover

1

2

7DK-030

2.

3

drain screw 3 on the carburetor float chamber.

8. Turn the engine switch to “OFF”.

9. Turn the fuel cock knob to “OFF”.

10. Tighten the drain screw 3.

11. Install the cover and tighten the screws.

7. Drain the fuel from the carburetor by loosening the

7DK-071

12. Turn the fuel tank cap air vent knob to “OFF”.

13. Tighten further if any screws, bolts and nuts are
loose.

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

– 31 –

Engine

7DK-072

Perform the following steps to protect the cylinder, pis­ton ring, etc. from corrosion.

1. Remove the spark plug, pour about one table­spoon of SAE 10W-30 or 20W-40 motor oil into the
spark plug hole and reinstall the spark plug. Recoil
start the engine by turning over several times (with
ignition off) to coat the cylinder walls with oil.

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

3. Clean exterior of the generator and apply a rust
inhibitor.

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

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

– 32 –

7DK-091

AE00512

TROUBLESHOOTING

Engine won’t start

1. 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 and fuel

cock knob to “ON” 1.

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

2 Clogged carburetor .... Clean carburetor.

1

7DK-035

1

7DK-038

2. Engine oil system
Insufficient

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

700-006

– 33 –

1

2

7DK-052

7DK-041

1

7DK-039

791-001d

3. Electrical systems

2 Engine switch to “ON” 1 and pull the recoil starter.

Poor spark

2 Spark plug dirty with carbon or wet .... Remove car-

bon or wipe spark plug dry.

2 Faulty ignition system .... Consult a Yamaha dealer.

AE00515

Generator won’t produce power

2 Safety device (DC protector) to “OFF” 2 ···· Press

the DC protector to “ON” 1.

2 Safety device (AC) to “OFF” .... Stop the

engine,then restart.

– 34 –

AE00515

A ENGINE DOES NOT START

B

Turn the engine switch to “ON”, then pull
the recoil starter and check if the oil
warining light flickers.

C Does not flicker D Flickers.

H

Pull the recoil starter and check the
spark plug for spark strength.
(See “WARNING”)

w

9 To prevent FIRE HAZARDS be

sure fuel is not present in the
spark plug area.

9 To prevent FIRE HAZARDS be

sure to place the spark plug as far
way as possible from the spark
plug hole and carburetor area.

9 To prevent ELECTRIC SHOCK do

not hold spark plug lead with
hand while testing.

I J

OK

Dose not spark

E Check engine oil level.

F OK G Level low

Consult a
Yamaha dealer.

K Check the spark plug.

9 Type: BPR6HS
9 Gap: 0.6–0.7 mm (0.024–0.028 in)

L Incorrect M OK

Replace or
Adjust Gap.

Add engine oil.

Clean the spark
plug.

N

Check the following

9 Fuel line clogging
9 Air cleaner element

clogging.

O Clogged

POK

– 35 –

Q

Clean or Replace; Consult a
Yamaha dealer.

R Consult a Yamaha dealer.

AE00701

SPECIFICATIONS

AE00702

Dimensions

Unit EF2000iS
Overall Length mm (in) 490 (13.3)
Overall Width mm (in) 280 (11.0)
Overall Height mm (in) 455 (17.9)
Dry Weight kg (lb) 20 (44)

AE00704

Engine

Unit EF2000iS

Type Air cooled 4-stroke gasoline OHV
Cylinder Arrangement
Displacement cm

3

Bore × Stroke mm (in) 48.6 × 43.0 (1.91 × 1.69)

Operation Hours Hr 4.2–10.5 (rated load–1/4 load)
Fuel Unleaded gasoline
Fuel Tank Capacity L (US gal, Imp gal) 4.2 (1.11, 0.92)
Engine Oil Quantity L (US qt, Imp qt) 0.4 (0.42, 0.35)
Ignition System CDI
Spark Plug: Type BPR6HS (NGK)

Gap mm (in) 0.6–0.7 (0.024–0.028)

Noise Level* dB (A) 61

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

Inclined, 1 cylinder

79

AE00707

Generator

Unit EF2000iS

AC Output
Rated voltage V 120
Rated frequency Hz 60
Rated current A 13.3
Rated output kVA 1.6
Safety Device: Type
DC Output
Rated voltage V 12
Rated current A 8
Safety Device: Type

– 36 –

Electronic

DC protector

7DK-073

7DK-24163-00

Serial NO.

7DK-

CONSUMER INFORMATION

PRI-I.D. NUMBER:

MODEL

PRI-I.D.
CODE

SERIAL No.

AE00012

Identification number records

Record your Primary I.D., and serial num­bers in the spaces provided, to assist you in
ordering spare parts from a Yamaha dealer.
Also record and keep these I.D. numbers in
a separate place in case your machine is
stolen.

AE00011

Machine identification

The machine serial number is stamped in
the location as shown.

TIP

The first three digits of these numbers are
for model identification; the remaining digits
are the unit production number. Keep a
record of these numbers for reference
when ordering parts from a Yamaha dealer.

– 37 –

AE01119

YAMAHA MOTOR CORPORATION U.S.A.

EF- AND EDL-SERIES GENERATOR LIMITED WARRANTY

Yamaha Motor Corporation, U.S.A. hereby warrants
that new Yamaha consumer generators purchased
from an authorized Yamaha consumer generator
dealer in the continental United States will be free
from defects in material and workmanship for the
period of time stated herein, subject to certain stat­ed limitations.

THE PERIOD OF WARRANTY Any new EF-series
or EDL-series Yamaha Generator purchased for
private, non-commercial use from an authorized
Yamaha consumer generator dealer in the conti­nental United States will
be warranted against defects in material or work­manship for a period two (2) years from date of pur­chase, subject to exclusions noted herein. Any
Yamaha non-commercial
generator purchased and utilized for commercial or
rental applications will be warranted for a period
one (1) year from the date of purchase, subject to
exclusions noted herein.

DURING THE PERIOD OF WARRANTY any
authorized Yamaha consumer generator dealer will,
free of charge, repair or replace, at Yamaha’s
option, any part adjudged defective by Yamaha due
to faulty workmanship or material from the factory.
Parts used in warranty repairs will be warranted for
the balance of the product’s warranty period. All
parts replaced under warranty become property of
Yamaha Motor Corporation U.S.A.

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

qualitatively equivalent to genuine Yamaha

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

SPECIFIC EXCLUSIONS from this warranty shall
include parts replaced due to normal wear or rou­tine maintenance.

THE CUSTOMER’S RESPONSIBILITY under this
warranty 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 con­sumer generator dealer of any and all apparent
defects within ten (10) days after discovery,
and make the unit available at that time for
inspection and repairs at such dealer’s place of
business.

WARRANTY TRANSFER: To transfer the warranty
from the original purchaser to any subsequent pur­chaser(s), it is imperative that the unit be inspected
and registered for warranty by an authorized
Yamaha consumer generator dealer. In order for
this warranty to remain in effect, this inspection and
registration must take place within ten (10) days
after transfer. An inspection and registration fee will
be charged for this service. In no case will the war­ranty be extended beyond the original period.

YAMAHA MOTOR CORPORATION, U.S.A. MAKES
NO OTHER WARRANTY OF ANY KIND,
EXPRESSED OR IMPLIED. ALL IMPLIED WAR­RANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE WHICH EXCEED
THE OBLIGATIONS AND TIME LIMITS STATED IN
THIS WARRANTY ARE HEREBY DISCLAIMED BY
YAMAHA MOTOR CORPORATION, U.S.A. AND
EXCLUDED FROM THIS WARRANTY.

SOME STATES DO NOT ALLOW LIMITATIONS ON
HOW LONG AN IMPLIED WARRANTY LASTS, SO
THE ABOVE LIMITATION MAY NOT APPLY TO YOU.
ALSO EXCLUDED FROM THIS WARRANTY ARE
ANY INCIDENTAL OR CONSEQUENTIAL DAM­AGES INCLUDING LOSS OF USE. SOME STATES
DO NOT ALLOW THE EXCLUSION OR LIMITATION
OF INCIDENTAL OR CONSEQUENTIAL DAMAGES,
SO THE ABOVE EXCLUSION MAY NOT APPLY TO
YOU.

THIS WARRANTY GIVES YOU SPECIFIC LEGAL
RIGHTS, AND YOU MAY ALSO HAVE OTHER
RIGHTS WHICH VARY FROM STATE TO STATE.

YAMAHA MOTOR CORPORATION, U.S.A.

Post Office Box 6555

Cypress, California 90630

– 38 –

WARRANTY QUESTIONS AND ANSWERS

Q. What costs are my responsibility during the

warranty period?

A. The customer’s responsibility includes all costs

of normal maintenance service, non-warranty
repairs, accident damages, as well as oil and
spark plugs.

Q. What are some examples of “abnormal” strain,

neglect, or abuse?

A. These terms are general and overlap each

other in areas. Specific examples include:
Running the machine out of oil; lack of proper
maintenance; operating the machine with a
broken or damaged part which causes anoth­er part to fail; and so on. If you have any spe­cific questions on operation or maintenance,
please contact your dealer for advice.

Q. Does the warranty cover incidental costs such

as transportation due to a failure?

A. No. The warranty is limited to repair of the

machine itself.

Q. May I perform any or all of the recommended

maintenance shown in the Owner’s Manual
instead of having the dealer do them?

A. Yes, if you are a qualified mechanic and follow

the procedures specified in the Owner’s and
Service Manual. We do recommend, however,
that items requiring special tools or equipment
be done by a Yamaha generator dealer.

Q. Will the warranty be void or cancelled if I do not

operate or maintain my new Yamaha exactly as
specified 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 by
operation or maintenance other than as
shown in the Owner’s Manual, that failure
may not be covered under warranty.

Q. What responsibility does my dealer have under

this 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 satisfaction
at the time of sale, and upon your request
at any later date.

In addition, each Yamaha generator dealer is
held responsible for his setup, service and war­ranty 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 reregistered
by an authorized Yamaha generator dealer for
the policy to remain effective.

CUSTOMER SERVICE

If your machine requires warranty service, you
must take it to any authorized Yamaha generator
dealer within the continental United States. Be sure
to bring your warranty registration identification or
other valid proof of the original date of purchase. If
a question or problem arises regarding warranty,
first contact the owner of the dealership. Since all
warranty matters are handled at the dealer level,
this person is in the best position to help you. If you
are still not satisfied and require additional assis­tance, please write:

YAMAHA MOTOR CORPORATION U.S.A.

CUSTOMER RELATIONS DEPARTMENT

P.O. BOX 6555

Cypress, California 90630

CHANGE OF ADDRESS

The federal government requires each manufactur­er to maintain a complete, up-to-date list of all first
purchasers against the possibility of a safety-relat­ed defect and recall. This list is compiled from the
purchase registrations sent to Yamaha Motor
Corporation, U.S.A. by the selling dealer at the time
of your purchase. If you should move after you have
purchased your new generator, please advise us of
your new address by sending a postcard listing
your Yamaha model name, engine number, dealer
number (or dealer’s name) as it is shown on your
warranty identification, your name and new mailing
address. Mail to:

YAMAHA MOTOR CORPORATION, U.S.A.

WARRANTY DEPARTMENT

P.O. Box 6555

Cypress, California 90630

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

– 39 –

AE00789

EXHAUST EMISSION CONTROL SYSTEM AND COMPONENTS

Item Acronym

9 CARB. ASSY., LH. & JT., .......................CARB (Carburetor)

CARBURETOR2

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

PLUG, SPARK

9 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 NONHANDHELD
ENGINES and the CALIFORNIA REGULATIONS FOR 1995 AND LATER SMALL OFF­ROAD ENGINES.
The acronyms conform to the latest version of the SAE’s recommended practice docu-
ment J1930, “Diagnostic Acronyms, Terms, and Definitions For Electrical/Electronic
System”.

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

– 40 –

W

Br

R

R

Br

R

Br

R

Br

R

Br

R

Br

Br

B

B

B

B

B

BB

B

B

B

Y

Y

O

O

O

Y

Y

Y

Y

YY

Y

Y

Y

Y

R

RR

R

R

L

L

L

L

L

L

L

L

L

G

G

Y

Y

O

O

O

O

O

OLO

O

B/W

B/W

R/W

Br

BrBr

R/W R/W R/W

G/Y

G/Y

O

G/Y

2

1

3

u

o

i

p

4

5

6

7

8

9

q

0

e

w

r

y

t

7DK-10

AE00751

WIRING DIAGRAM

1 Sub coil
2 DC coil
3 Main coil
4 DC rectifier
5 DC protector (breaker)
6 Twin Tech (parallel

running terminal)

7 DC receptacle
8 AC pilot light
9 AC receptacle
0 Economy control switch
q Overload indicator light
w Engine switch
e Oil warning light
r Ground (Earth) terminal
t Control unit
y CDI unit/Ignition coil
u Stepping motor
i Spark plug
o CDI magneto

p Oil level gauge

– 41 –

Color code

B Black
Br Brown
G Green
Gy Gray
L Blue
O Orange
R Red
W White
Y Yellow
B/W Black/White
G/Y Green/Yellow
R/W Red/White

PRINTED ON RECYCLED PAPER

PRINTED IN JAPAN

2009.01-1.0×1 !

(E)