FUEL
FlLT
FIGURE
14.
FUEL STRAINER CLEANING
To clean the fuel strainer, remove the fuel sediment
bowl and the screen (Figure
14)
and thoroughly wash
the screen. At the same time, remove and clean
carburetor float bowl. Assemble and check for leaks.
On gaseous fuel systems, periodic service should
include cleaning or replacing the air cleaner, car-
buretor adjustment, inspection of hoses, etc. and
cleaning the optional dry fuel filter.
FUEL
ou
FIGURE
16.
TESTING FUEL PUMP PRESSURE
Fuel Pump (Gasoline Fuel System)
The fuel pump (Figure
15)
is located on the left sideof
the engine. If fuel doesn’t reach the carburetor, make
the following checks:
1.
Check fuel tank and see that shut-off valve is
open.
2.
Remove fuel line from pump outlet and crank
engine over several times. On manual models,
operate priming lever instead of cranking engine.
Fuel should spurt out of pump.
If
not, remove
pump for repair or replacement.
Testing:
Perform these tests before removing the
pump from the engine. If the fuel pump delivers fuel,
test
it
with a pressure gauge or manometer.
1.
Disconnect pump outlet line and install the
pressure gauge (Figure
16).
2.
Test valves and diaphragm by operating priming
lever a few times. The pressure shouldn’t drop off
rapidly after priming has stopped.
3.
Run engine at governed speed on fuel remaining
VALVE AND CAGE
ASSEM EL IES
FIGURE
15.
FUELPUMP
19
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