Yamaha Ef2000is 2 Manual

– 16–
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:
9in 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.
9in 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...

– 17–
1
7DK-034
7DK-047
1
7DK-044
1
7DK-045
1
7DK-092
AE01025
Stopping the engine
TIP
Turn off any electric devices.
1. Turn the economy control switch (Black) to “OFF”
1.
13“OFF”
3. Turn the engine switch (Red) to “STOP”1.
15“STOP”
4. Turn the fuel cock knob to “OFF”1.
1“OFF”
2. Disconnect any electric devices.
5. Turn the fuel tank cap air vent knob to “OFF”1
after the engine has completely cooled down.
 7DK-9-11_a  11.3.21 15:19  Page 17 

– 18–
AE00839
Connection
Alternating Current (AC)
Be sure any electric devices are turned off before
plugging them in.
9Be sure all electric devices including the lines
and plug connections are in good condition
before connection to the generator.
9Be sure the total load is within generator rated
output.
9Be sure the receptacle load current is within
receptacle rated current.
TIP
Make sure to ground (earth) the generator.
When the electric device is grounded, be sure to
ground the generator also.
1....

– 19–
Battery charging
Do not connect a VRLA (Valve Regulated Lead
Acid) battery. To charge a VRLA battery, a special
(constant-voltage) battery charger is required.
TIP
9The generator DC rated voltage is 12V.
9Start the engine first, and then connect the gener-
ator to the battery for charging.
9Before starting to charge the battery, make sure
that the DC protector is turned on.
1. Start the engine.
NOTICE
762-040
1 2
6v 6v
12v762-041
2. Connect the red battery charger lead to the posi-
tive (+) battery...

– 20–
9Be sure the economy control switch is turned
off while charging the battery.
9Be 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.
9Connect 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.
9Charge the battery in the correct procedure by
following instructions in the...

– 21–
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...

– 22–
Operating range of DC power supply
(exclusively for charging 12V battery)
This power source is designed to charge batteries up to
40Ah that are half-discharged. Do not charge batteries
of a higher capacity than 40Ah.
12V battery
The time required for recharging a battery varies
depending on the discharge level of the battery. When
the specific gravity of the battery reaches 1.26 to 1.28,
charging is complete. When charging, check the bat-
tery’s specific gravity once an hour.
The average time for...

– 23–
AE00812
Application range
When using the generator, make sure the total load is within rated output of a generator.
Otherwise, generator damage may occur.
9Do not overload. The total load of all electrical appliances must not exceed the
supply range of the generator. Overloading will damage the generator.
9When supplying precision equipment, electronic controllers, PCs, electronic
computers, microcomputer-based equipment or battery chargers, keep the
generator a sufficient distance away to prevent...

– 24–
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.
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...

– 25–
*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.
Item RoutinePre-
operation
checkEvery
6 months 
or 100 Hr12 months
or 300 Hr
Crankcase breather •Check breather hose for cracks or 
hosedamage.1
•Replace if necessary.
Cylinder...