8-11
GASOLINE FUEL SYSTEM
The fuel system must be properly adjusted and in
good condition for efficient genset operation. The
main components of the fuel system include:
• Air filter
• Air preheater
• Choke
• Carburetor
• Intake manifold
• Fuel filter
• Fuel pump
Air Filter and Preheater Assembly
This assembly consists of the air filter housing, air
filter, and preheat door assembly. See Figure 8-8.
WARNING
Fuel presents the hazard of fire or
explosion that can cause severe personal injury
or death. Eliminate all possible ignition sources
such as open flame, sparks, cigarettes, pilot
lights, arc-producing equipment, and electrical
switches from the work area and rooms with
common ventilation, when performing the fol-
lowing procedures.
The air filter can be serviced without removing the
genset from the vehicle. Remove the service ac-
cess cover and the air filter housing/cover. Remove
the air filter. If the air filter is dirty, replace it.
Spec A:
The preheat door assembly is located in-
side the air filter housing. Inspection of the preheat-
er door operation can be made at this point.
Spec B:
The preheat door assembly is located in-
side the air housing assembly. If a problem with the
preheat door assembly is suspected, refer to Sec-
tion
9. Generator
for details on removing the air
housing assembly.
The preheater door should be fully open at 70
°F
(21
°C) and should align with the top of the housing.
Rotate the door down over the round air inlet open-
ing in the housing, then release it. The door should
move freely back to the open position. If the door
does not move freely, clean the spring and housing
with low pressure compressed air and retest.
FS1866s
AIR FILTER
PREHEAT
DOOR
HOUSING
TOP OF
HOUSING
ROUND
AIR INLET
OPENING
AIR FILTER
HOUSING
COVER
FILTER
COVER
WING
NUTS
FOAM BLOCK
(60 HZ ONLY)
M18967
SPEC A MODELS
BEGIN SPEC B MODELS
TOP OF
HOUSING
PREHEAT
DOOR
FIGURE 8-8. AIR FILTER AND PREHEATER
ASSEMBLY
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