Generator
OWNER’S MANUAL
Read this manual carefully before operating this machine.
EF2000iS
LIT-19626-01-53
7DK-28199-10
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AE00002
INTRODUCTION
Congratulations on your purchase of your new Yamaha.
This manual will provide you with a good basic understanding of the operation and main-
tenance of this machine.
If you have any questions regarding the operation or maintenance of your machine,
please consult a Yamaha dealer.
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
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IMPOTANT MANUAL INFORMATION
Particularly important information is distin-
guished 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 mes-
AE00032
sages that follow this symbol to avoid
possible injury or death.
WARNING
PLEASE READ AND UNDERSTAND
THIS MANUAL COMPLETELY BEFORE
OPERATING THE MACHINE.
WARNING
A WARNING indicates a hazardous situ-
ation which, if not avoided, could result
in death or serious injury.
TIP
9 Yamaha continually seeks advance-
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.
9 This manual should be considered a
permanent part of this engine and
should remain with this engine when
resold.
NOTICE
A NOTICE indicates special precau-
tions that must be taken to avoid dam-
age to the machine or other property.
TIP
A TIP provides key information to make
procedures easier or clearer.
* Product and specifications are subject to
change without notice.
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AE00041
CONTENTS
SAFETY INFORMATION.........................1
EXHAUST FUMES ARE
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
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
EDL-SERIES) ........................................38
EXHAUST EMISSION CONTROL
SYSTEM AND COMPONENTS .........40
WIRING DIAGRAM ...............................41
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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.
7DK-001
7DK-002
7DK-003
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 immedi-
ately. 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 –
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9 Keep the machine at least 1 m (3 ft) from buildings
a
or other equipment, or the engine may overheat.
a 1 m (3 ft)
7DK-007
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.
7DK-008a
9 Be sure to carry the generator only by its carrying
handles 1.
1
7DK-036
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 –
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9 Connect the ground lead of the machine to the
ground (Earth) terminal 1 and connect the end to
the ground electrode buried in the ground.
1
7DK-011
AE00088
CONNECTION NOTES
9 Avoid connecting the generator to commercial
power outlet.
9 Avoid connecting the generator in parallel with any
other generator.
1
2
1
2
1 Correct
2 Incorrect
AE00091
CONNECTION
WARNING
Before the generator can be connected to a build-
ing’s electrical system, a licensed electrician must
install an isolation (transfer) switch in the build-
ing’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 sup-
ply has failed or has been turned off for line repair.
Backfeeding can electrocute or injure line mainte-
nance personnel. Also, generator and building
electrical system damage can occur when normal
operating power returns if unit is used without an
isolation switch.
7DK-012
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 –
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AE00062
LOCATION OF IMPORTANT LABELS
Please read the following labels carefully before oper-
ating this machine.
TIP
Maintain or replace safety and instruction labels, as
necessary.
1
2
3
4
6
5
7DK-013
7DK-014
1
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 Only use OUTSIDE and
or garage, EVEN IF doors far away from windows,
and windows are open.
door, and vents.
– 4 –
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2
q
WARNING
Read the owner’s manual and all labels before operating.
Only operate in well-ventilated areas. Exhaust gas contains poisonous carbon monoxide.
Check for spilled fuel or fuel leaks.
8
8
8
8
8
8
8
Stop engine before refueling.
Do not operate near flammable materials.
Electrocution can occur if generator is used in rain, snow, or near water. Keep this unit dry at all times.
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.
When operating the generator:
8
Never place a partition or other barrier around the generator.
Do not cover the generator with a box.
7DK-24162-10
Do not place any objects on the generator.
3
4
NOTICE
Use the specified spark plug only.
HOT EXHAUST
7WL-28176-10
Specified plug:BPR6HS(NGK)
5
Important Emissions Information
The air index of this engine is 3
(California only)
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.
0
2
4
6
8
10
MOST CLEAN
LEAST CLEAN
Note:The lower the air index, the less the pollution.
This engine is certified to be emissions compliant
for the following use:
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.
MODERATE
(*** HOURS)
Check owner's manual for further details.
INTERMEDIATE
(*** HOURS)
EXTENDED
(*** HOURS)
X
6
OIL
EF2000IS
AC output
Rated
60Hz
1.6kVA
120V
Phase
DC output
Fuel
Single
12V 8A
Gasoline
YAMAHA MOTOR POWERED PRODUCTS CO.,LTD.
7DK-24164-10
MADE IN JAPAN
– 5 –
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DESCRIPTION
1
5
2
1 Carrying handle
2 Fuel tank cap air vent knob
3 Fuel tank cap
4 Recoil starter
5 Fuel gauge
3
6
6 Muffler
7 Oil filler cap
4
7
7DK-015
7DK-016
1
2 3
4 5
AE00103
Control panel
1 Oil warning light
2 AC pilot light
6
3 Overload indicator light
4 Economy control switch
(Black)
7
8
5 Engine switch (Red)
6 Fuel cock knob
7 Choke knob
8 Twin Tech (parallel running
terminal)
w
9 AC receptacle
0 DC protector (breaker)
q Ground (Earth) terminal
w DC receptacle
9
7DK-017
q
0
– 6 –
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AE00101
CONTROL FUNCTION
AE00121
Engine switch
The engine switch controls the ignition system.
2
1
7DK-018
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 auto-
matically. 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 elec-
tric device being connected to the generator is operat-
ing and current above the rated flows.To use this equip-
ment 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.
1
2
7DK-052
– 7 –
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NOTICE
Reduce the load of the connected electric device
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”
2
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.
1
7DK-020
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) regard-
less 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 –
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AE01087
Overload indicator light (Red)
The overload indicator light 1 comes on when an over-
load 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.
1
7DK-021
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 sec-
onds at first when using electric devices that require a
large starting current, such as a compressor or a sub-
mergible pump. However, this is not a malfunction.
Fuel tank cap
Remove the fuel tank cap by turning it counterclock-
wise.
7DK-022
– 9 –
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Fuel tank cap air vent knob
The fuel tank cap 2 is provided with an air vent knob
1 to stop fuel flow.
2
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.
1
7DK-023
Fuel cock knob
The fuel cock supplies fuel from the fuel tank to the car-
buretor.
2
1
The fuel cock has two positions.
1 “ON”
7DK-024
With the knob in this position, fuel flows to the carbure-
tor. 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-
ator must be earthed.
1
7DK-011
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.)
7DK-042a
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 –
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PREPARATION
AE00856
Fuel
WARNING
9 Fuel is highly flammable and poisonous. Check
“SAFETY INFORMATION” (See page 1) careful-
ly before filling.
7DK-026
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.
7DK-091
NOTICE
9 Immediately wipe off spilled fuel with a clean,
dry, soft cloth, since fuel may deteriorate paint-
ed surfaces or plastic parts.
9 Use only unleaded gasoline. The use of leaded
gasoline will cause severe damage to internal
engine parts.
707-095
Remove the fuel tank cap and fill the fuel into the tank
up to the red level 2.
2
The fuel level in the fuel tank can be checked through
the fuel level gauge 1.
1 Fuel level gauge
2 Red line
1
7DK-037
3 Fuel level
3
Recommended fuel:
Unleaded gasoline
Fuel tank capacity:
Total:
4.2 L (1.11 US gal, 0.92 Imp gal)
7DK-028
4 “F”
5 “E”
Full
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
or higher.
7DK-093
– 11 –
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AE00222
Engine oil
NOTICE
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.
1
2
7DK-030
3. Remove the oil filler cap 1.
1
7DK-031
4. Fill the specified amount of the recommended
engine oil, and then install and tighten the oil filler
cap.
7DK-033
1 Upper level
1
Recommended engine oil:
å
YAMALUBE 4 (10W-40),
SAE 10W-30 or 10W-40
SAE #30
SAE #20
SAE 10W
700-119
∫
ç
∂
0°C
25°C
å
Recommended engine oil grade:
API Service SE type or higher
Engine oil quantity:
YAMALUBE 4 (10W-40)
∂
ç
∫
SAE 10W
SAE #20
SAE #30
0.4 L (0.42 US qt, 0.35 lmp qt)
32°F
80°F
5. Install the cover and tighten the screws.
– 12 –
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AE00845
PRE-OPERATION CHECK
WARNING
If any item in the Pre-operation check is not work-
ing properly, have it inspected and repaired before
operating the generator.
The condition of a generator is the owner's responsibil-
ity. 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 –
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AE00846
OPERATION
WARNING
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 venti-
lated area.
7DK-047
9 Before starting the engine, do not connect any
electric devices.
NOTICE
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
7DK-034
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 Air vent knob
1
7DK-035
3. Turn the fuel cock knob to “ON” 1.
1 “ON”
1
7DK-038
4. Turn the engine switch (Red) to “ON” 1.
1 7 “ON”
1
7DK-039
– 14 –
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5. Pull the choke knob 1 fully out.
1
1 Choke knob
TIP
The choke is not required to start a warm engine.
Push the choke knob in to the original position.
7DK-040
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-
tor from falling over when pulling the recoil starter.
7DK-041
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.
7DK-042
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 –
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AE01025
Stopping the engine
TIP
Turn off any electric devices.
1
7DK-034
1. Turn the economy control switch (Black) to “OFF”
1.
1 3 “OFF”
2. Disconnect any electric devices.
7DK-047
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 “OFF”
1
7DK-045
5. Turn the fuel tank cap air vent knob to “OFF” 1
after the engine has completely cooled down.
1
7DK-092
– 16 –
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AE00839
Connection
Alternating Current (AC)
WARNING
Be sure any electric devices are turned off before
plugging them in.
NOTICE
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 gener-
ator must be earthed.
1. Start the engine.
2. Plug in to AC receptacle.
7DK-043
7DK-048
7DK-049
3. Make sure the AC pilot light 1 is on.
1 AC pilot light
1
4. Turn the economy control switch to “ON” 1.
1 I “ON”
5. Turn on any electric devises.
TIP
1
The economy control switch must be turned to “OFF” to
increase engine speed to rated rpm.
– 17 –
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Battery Charging
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
2
1
1. Start the engine.
2. Connect the red battery charger lead to the posi-
tive (+) battery terminal.
762-040
3. Connect the black battery charger lead to the neg-
ative (-) battery terminal.
4. Turn the economy control switch off to start battery
charging.
NOTICE
9 Be sure the economy control switch is turned
off while charging the battery.
762-041
9 Be sure to connect the red battery charger lead
to the positive (+) battery terminal, and connect
the black lead to the negative (-) battery termi-
nal. Do not reverse these positions.
9 Connect the battery charger leads to the bat-
tery terminals securely so that they are not dis-
connected due to engine vibration or other dis-
turbances.
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
charging.
1
2
7DK-052
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 –
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TIP
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 over-
charging the battery.
WARNING
Never smoke or make and break connections at the
battery while charging. Sparks may ignite the bat-
tery gas.
Battery electrolyte is poisonous and dangerous,
causing severe burns, etc. contains sulfuric (sul-
phuric) acid. Avoid contact with skin, eyes or cloth-
ing.
Antidote:
EXTERNAL-Flush with water.
INTERNAL-Drink large quantities of water or milk.
Follow with milk of magnesia, beaten egg or veg-
etable oil. Call physician immediately.
EYES: Flush with water for 15 minutes and get
prompt medical attention. Batteries produce explo-
sive gases. Keep sparks, flame, cigarettes, etc.,
away. Ventilate when charging or using in closed
space. Always cover eyes when working near bat-
teries. KEEP OUT OF REACH OF CHILDREN.
762-012
– 19 –
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AE00812
Application range
When using the generator, make sure the total load is within rated output of a generator.
Otherwise, generator damage may occur.
DC
AC
0.4–0.75
Power factor
EF2000iS
1
0.8–0.95
–1,280W
(Efficiency 0.85)
Rated voltage
12V
Rated current
8A
–1,600W
–544W
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
Frequency Power factor
1,600VA
1.0
0.8
–1,500W
–1,180W
96W
AC
DC
1
—
(12V/8A)
9 The overload indicator light 1 comes on when
total wattage exceeds the application range. (See
page 9 for more details.)
7DK-021
NOTICE
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 gen-
erator 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 fur-
ther advice.
– 20 –
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AE00401
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 impor-
tant points of generator inspection, adjustment, and lubrication are explained on the fol-
lowing pages.
WARNING
If you are not familiar with maintenance work, have a Yamaha dealer do it for you.
AE00403
Maintenance chart
WARNING
Stop the engine before starting maintenance work.
NOTICE
Use only Yamaha specified genuine parts for replacement. Ask an authorized
Yamaha dealer for further attention.
Every
Pre-
operation
check
Item
Routine
6 months 12 months
or 100 Hr or 300 Hr
• Check condition.
Spark plug
1
• Clean and replace if necessary.
• Check fuel level and leakage.
Fuel
1
1
1
Fuel hose
• Check fuel hose for cracks or damage.
Replace if necessary.
• Check oil level in engine.
• Replace
Engine oil
1(*1)
1(*2)
• Check condition.
Air filter element
Muffler screen
• Clean
• Check condition.
1
• Clean and replace if necessary.
• Check condition.
Spark arrester
Fuel filter
1
• Clean and replace if necessary.
• Clean and replace if necessary.
1
– 21 –
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Every
Pre-
operation
check
Item
Routine
6 months 12 months
or 100 Hr or 300 Hr
• Check breather hose for cracks or
Crankcase breather
hose
damage.
1
• Replace if necessary.
• Decarbonize cylinder head.
• More frequently if necessary.
• Check and adjust when engine is cold.
• Check all fittings and fasteners.
• Correct if necessary.
Cylinder head
#
#
#
Valve clearance
Fittings / fasteners
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 –
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Spark plug inspection
The spark plug is important engine components, which
should be checked periodically.
1. Remove the screws 1, and then remove the cover
2.
1
2
7DK-030
2. Remove the spark plug cap 3 and cap 4, and
insert the tool 5 through the hole from the outside
of the cover.
4
3
7DK-053
3. Insert the handlebar 6 into the tool 5 and turn it
6
5
counterclockwise to remove the spark plug.
7DK-054
4. Check for discoloration and remove the carbon.
The porcelain insulator around the center elec-
trode 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:
a
0.6–0.7 mm (0.024–0.028 in)
760-001a
TIP
The spark plug gap should be measured with a wire
thickness gauge and, if necessary, adjusted to specifi-
cation.
– 23 –
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6. Install the spark plug.
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 1/4-
1/2 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
WARNING
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.
1
2
7DK-030
3. Remove the oil filler cap 1.
1
7DK-031
– 24 –
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4. Place an oil pan under the engine. Tilt the genera-
tor to drain the oil completely.
5. Replace the generator on a level surface.
NOTICE
Do not tilt the generator when adding engine oil.
This could result in overfilling and damage to the
engine.
7DK-055
7DK-033
6. Add engine oil to the upper level 1.
Recommended engine oil:
q
å
YAMALUBE 4 (10W-40),
SAE 10W-30 or 10W-40
SAE #30
SAE #20
SAE 10W
∫
ç
700-006a
∂
0°C
25°C
Recommended engine oil grade:
API Service SE type or higher
Engine oil quantity:
å
YAMALUBE 4 (10W-40)
0.4 L (0.42 US qt, 0.35 lmp qt)
∂
ç
∫
SAE 10W
SAE #20
SAE #30
32°F
80°F
7. Wipe the cover clean, and wipe up any spilled oil.
NOTICE
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 –
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AE01084
Air filter
1. Remove the screws 1, and then remove the cover
2.
1
2
7DK-030
2. Remove the screw 1 and then remove the air filter
case cover 2.
2
7DK-061
1
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.
The foam element should be wet but not dripping.
1
Recommended oil:
Foam-air-filter oil or SAE #20 motor oil
NOTICE
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.
NOTICE
7DK-062
The engine should never run without the foam ele-
ment; 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 –
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AE01075
Muffler screen and spark arrester
WARNING
The engine and muffler will be very hot after the
engine has been run.
7DK-026
Avoid touching the engine and muffler while they
are still hot with any part of your body or clothing
during inspection or repair.
1. Remove the screws 1, and then pull outward on
the areas of the cover 2 shown.
2
1
1
7DK-066
2. Loosen the bolt 1 and then remove the muffler cap
2, the muffler screen 3 and spark arrester 4.
3
2
1
7DK-063
7DK-064
4
7DK-065
– 27 –
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3. Remove the carbon deposits on the muffler screen
and spark arrester using a wire brush.
NOTICE
When cleaning, use the wire brush lightly to avoid
damaging or scratching of the muffler screen and
spark arrester.
711-075
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.
2
1
7DK-065a
6. Install the muffler screen and the muffler cap.
7. Install the cover and tighten the screws.
7DK-068
– 28 –
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AE00471
Fuel tank filter
1
WARNING
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.
WARNING
Be sure the fuel tank cap is tightened securely.
7DK-069
– 29 –
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AE00601
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.
1
7DK-044
WARNING
Fuel is highly flammable and poisonous. Check
“SAFETY INFORMATION” (See page 1) carefully.
NOTICE
7DK-025
Immediately wipe off spilled fuel with a clean, dry,
soft cloth, since fuel may deteriorate painted sur-
faces or plastic parts.
3. Turn the engine switch to “ON” 1.
1
7DK-039
7DK-035
7DK-038
1
4. Turn the fuel tank cap air vent knob and fuel cock
knob to “ON” 1.
5. Start the engine and leave it run until it stops.
The engine stops in approx. 20 mins. time by run-
ning out of fuel.
1
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 –
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6. Remove the screws 1, and then remove the cover
2.
1
2
7DK-030
7. Drain the fuel from the carburetor by loosening the
drain screw 3 on the carburetor float chamber.
8. Turn the engine switch to “OFF”.
3
9. Turn the fuel cock knob to “OFF”.
10. Tighten the drain screw 3.
11. Install the cover and tighten the screws.
12. Turn the fuel tank cap air vent knob to “OFF”.
7DK-071
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 –
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Engine
Perform the following steps to protect the cylinder, pis-
ton ring, etc. from corrosion.
1. Remove the spark plug, pour about one table-
spoon 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.
7DK-072
– 32 –
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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.
7DK-091
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 –
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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.
1
7DK-039
7DK-041
791-001d
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.
1
2
7DK-052
– 34 –
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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.
E
F
Check engine oil level.
C
H
Does not flicker
D
Flickers.
Pull the recoil starter and check the
spark plug for spark strength.
(See “WARNING”)
OK
Consult a
Yamaha dealer.
G
Level low
Add engine oil.
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.
K
Check the spark plug.
9 Type: BPR6HS
9 Gap: 0.6–0.7 mm (0.024–0.028 in)
L
Incorrect
Replace or
Adjust Gap.
M
OK
Clean the spark
plug.
I
J
OK
Dose not spark
N
Q
Check the following
9 Fuel line clogging
9 Air cleaner element
clogging.
Clean or Replace; Consult
Yamaha dealer.
a
O
P
Clogged
OK
R
Consult a Yamaha dealer.
– 35 –
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AE00701
SPECIFICATIONS
AE00702
Dimensions
Unit
EF2000iS
490 (13.3)
280 (11.0)
455 (17.9)
20 (44)
Overall Length
Overall Width
Overall Height
Dry Weight
mm (in)
mm (in)
mm (in)
kg (lb)
AE00704
Engine
Unit
cm3
EF2000iS
Type
Air cooled 4-stroke gasoline OHV
Cylinder Arrangement
Displacement
Inclined, 1 cylinder
79
Bore × Stroke
Operation Hours
mm (in)
Hr
48.6 × 43.0 (1.91 × 1.69)
4.2–10.5 (rated load–1/4 load)
Fuel
Unleaded gasoline
4.2 (1.11, 0.92)
0.4 (0.42, 0.35)
CDI
Fuel Tank Capacity L (US gal, Imp gal)
Engine Oil Quantity L (US qt, Imp qt)
Ignition System
Spark Plug: Type
BPR6HS (NGK)
0.6–0.7 (0.024–0.028)
61
Gap
mm (in)
dB (A)
Noise Level*
* : Measured at rated operation from 7 m (23 ft) distance.
AE00707
Generator
Unit
EF2000iS
AC Output
Rated voltage
Rated frequency
Rated current
Rated output
V
Hz
A
120
60
13.3
kVA
1.6
Safety Device: Type
DC Output
Electronic
Rated voltage
Rated current
Safety Device: Type
V
A
12
8
DC protector
– 36 –
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CONSUMER INFORMATION
AE00012
PRI-I.D. NUMBER:
Identification number records
Record your Primary I.D., and serial num-
bers 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.
MODEL
PRI-I.D.
SERIAL No.
CODE
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.
Serial NO.
7DK-
7DK-24163-00
7DK-073
– 37 –
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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 stat-
ed limitations.
2. Give notice to an authorized Yamaha con-
sumer 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 pur-
chaser(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 war-
ranty be extended beyond the original period.
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 conti-
nental United States will
be warranted against defects in material or work-
manship for a period two (2) years from date of pur-
chase, subject to exclusions noted herein. 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.
YAMAHA MOTOR CORPORATION, U.S.A. MAKES
NO OTHER WARRANTY OF ANY KIND,
EXPRESSED OR IMPLIED. ALL IMPLIED WAR-
RANTIES 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.
DURING THE PERIOD OF WARRANTY any
authorizedYamaha 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.
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 DAM-
AGES 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.
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.
THIS WARRANTY GIVES YOU SPECIFIC LEGAL
RIGHTS, AND YOU MAY ALSO HAVE OTHER
RIGHTS WHICH VARY FROM STATE TO STATE.
SPECIFIC EXCLUSIONS from this warranty shall
include parts replaced due to normal wear or rou-
tine maintenance.
YAMAHA MOTOR CORPORATION, U.S.A.
Post Office Box 6555
THE CUSTOMER’S RESPONSIBILITY under this
warranty shall be to:
Cypress, California 90630
1. Operate and maintain the generator as speci-
fied in the appropriate Owner’s Manual;
– 38 –
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WARRANTY QUESTIONS AND ANSWERS
Q. What costs are my responsibility during the
Q. Is the warranty transferable to second owners?
A. Yes. The remainder of the existing warranty
can be transfered upon request.
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.
The unit has to be inspected and reregistered
by an authorized Yamaha generator dealer for
the policy to remain effective.
Q. What are some examples of “abnormal” strain,
neglect, or abuse?
CUSTOMER SERVICE
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 anoth-
er part to fail; and so on. If you have any spe-
cific questions on operation or maintenance,
please contact your dealer for advice.
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 assis-
tance, please write:
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.
YAMAHA MOTOR CORPORATION U.S.A.
CUSTOMER RELATIONS DEPARTMENT
P.O. BOX 6555
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.
Cypress, California 90630
CHANGE OF ADDRESS
The federal government requires each manufactur-
er to maintain a complete, up-to-date list of all first
purchasers against the possibility of a safety-relat-
ed 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:
Q. Will the warranty be void or cancelled if I do not
operate or maintain my newYamaha 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.
YAMAHA MOTOR CORPORATION, U.S.A.
WARRANTY DEPARTMENT
P.O. Box 6555
Cypress, California 90630
2. Explain the operation, maintenance, and
warranty requirements to your satisfaction
at the time of sale, and upon your request
at any later date.
This will ensure that Yamaha Motor Corporation,
U.S.A. has an up-to-date registration record in
accordance with federal law.
In addition, each Yamaha generator dealer is
held responsible for his setup, service and war-
ranty repair work.
– 39 –
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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 OFF-
ROAD ENGINES.
The acronyms conform to the latest version of the SAE’s recommended practice docu-
ment J1930, “Diagnostic Acronyms, Terms, and Definitions For Electrical/Electronic
System”.
It is recommended that these items be serviced by a Yamaha dealer.
– 40 –
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AE00751
WIRING DIAGRAM
L
L
W
B
R
1
6
5
Br
B
L
O
L
O
2
3
7
4
t
O
Br
R
O
Br
Br
Br
R
Y
Y
Y
O
O
Br
R
8
Y
Y
R
R
Y
9
B
R
B
R
0
q
G
Y
R
L
G
G/Y
Y
R
u
Y
Y
L
O
O
B/W
B/W
i
O
O
G/Y
B
Br
R/W
B
B
R/W
Br
B
R/W
Br
L
R
O
B
O
L
Y
w
e
G/Y
Br
R/W
o
y
Y
Y
L
L
Y
B
p
r
7DK-10
Color code
1 Sub coil
2 DC coil
3 Main coil
p Oil level gauge
B
Black
Brown
Green
Gray
Br
G
Gy
L
4 DC rectifier
5 DC protector (breaker)
6 Twin Tech (parallel
running terminal)
7 DC receptacle
8 AC pilot light
Blue
O
R
Orange
Red
W
Y
White
Yellow
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
B/W Black/White
G/Y Green/Yellow
R/W Red/White
y CDI unit/Ignition coil
u Stepping motor
i Spark plug
o CDI magneto
– 41 –
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PRINTED IN JAPAN
2009.01-1.0×1 !
(E)
PRINTED ON RECYCLED PAPER
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