Replacement Part List
ADD FUEL
Page 15
Fuel must meet these requirements:
•
Clean, fresh, unleaded gasoline.
Use regular UNLEADED gasoline with the 
generator engine with a minimum 87 octane
/ 87 AKI (91 RON).
For high altitude use, see "Operation at High 
Altitude".
Do not use gasoline with more than 10% 
alcohol such as E85 or ethanol.
•
•
Failure to follow Operator's Manual for fuel
recommendations voids warranty.
Avoid generator damage.
DO NOT use unapproved gasoline such as E85.
DO NOT mix oil in gasoline.
DO NOT modify engine to run on alternate fuels.
•
•
•
WARNING
Fuel and its vapors are extremely flammable 
and explosive which could cause burns, fire or 
explosion resulting in death, serious injury 
and/or property damage.
WHEN ADDING FUEL
Fill fuel tank outdoors.
 DO NOT overfill tank. Allow space for fuel 
 expansion. If the tank is overfilled, fuel 
can overflow onto a hot engine and cause fire 
or explosion. Wipe up any spilled fuel 
immediately.
If fuel spills, wait until it evaporates before 
starting engine.
Keep fuel away from sparks, open flames, 
pilot lights, heat, and other ignition sources.
Check fuel lines, tank, cap and fittings 
frequently for cracks or leaks. Replace if 
necessary.
 DO NOT light a cigarette or smoke when 
 filling the fuel tank.
•
•
•
•
1.Clean area around fuel fill cap, remove cap.
2.Slowly add unleaded fuel to fuel tank. Be 
careful not to fill above the red fuel level 
indicator . This allows adequate space for 
fuel expansion.
3.Install fuel cap and let any spilled fuel 
evaporate before starting engine or wipe up 
any spilled gasoline.
CAUTION
Slowly add unleaded gasoline to fuel tank.
Do not overfill tank.
•
•
•
Operation at High Altitude
At altitudes over 5,000 feet(1524 meters), a 
minimum 85 octane / 85 AKI (89 RON) gasoline 
is acceptable.
The density of air at high altitude is lower 
than at sea level. Engine power is reduced 
as the air mass and air-fuel ratio decrease. 
Engine power and generator output will be 
reduced approximately 3.5% for every 1000 feet 
of elevation above sea level. This is a 
natural trend and cannot be changed by 
adjusting the engine. At high altitudes 
increased exhaust emissions can also result 
due to the increased enrichment of the air 
fuel ratio.
Other high altitude issues can include hard 
starting, increased fuel consumption and 
spark plug fouling. To alleviate high 
altitude issues other than the natural
power loss, FIRMAN can provide a high 
altitude carburetor main jet. The alternative 
English Customer Service: 1-844-FIRMAN1
Do not fill above the red fuel level indicator. 
This will all expansion in hot weather and 
prevent overflow.
Fuel Level Indicator










