Replacement Part List
Add Fuel
Page 13
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.
English Customer Service: 1-844-FIRMAN1
CAUTION
Slowly add unleaded gasoline to fuel tank.
Do not overfill tank.
Do not fill above the red line indicator. 
This will allow expansion in hot weather 
and prevent overflow.
•
•
•
Red Line Indicator
IMPORTANT:  It  is  important  to  prevent  gum 
deposits  from  forming in  fuel  system parts  such 
as the carburetor, fuel hose or tank during storage. 
Alcohol-blended  fuels  (called  gasohol,  ethanol 
or methanol)  can attract moisture,  which leads to 
separation and formation of acids during storage. 
Acidic gas can damage the fuel system of an engine 
while  in  storage. To  avoid engine  problems, the 
fuel  system  should  be  emptied  before  storage  of 
30 days  or  longer.  See  the  "  Long  Term  Storage" 
section. Never use engine or carburetor cleaner 
products  in  the fuel  tank as  permanent damage 
may occur.
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 










