4-10
Troubleshooting
Problem: Starting impaired
Condition
Remedy
1.
Carburetor
leaking air
2.
Choke
not operating properly
1. Tighten - adjust carburetor - replace gasket
2. Check choke assembly
Problem: Idling or low speed impaired
Condition
Remedy
1.
Slow jet
obstructed - loose
2.
Needle jet
obstructed
3.
Pilot screw setting
incorrect
4.
Float level
incorrect
1. Clean - tighten jet
2. Clean jet
3. Adjust pilot screw
4. Adjust float arm height
Problem: Medium or high speed impaired
Condition
Remedy
1.
Main jet
obstructed
2.
Needle jet
obstructed
3.
Throttle valve
not operating properly
4.
Filter
obstructed
5.
Float level
incorrect
1. Clean main jet
2. Clean needle jet
3. Check throttle valve operation
4. Clean filter
5. Adjust float arm height
Problem: Overflow and fuel level fluctuations
Condition
Remedy
1.
Needle valve
worn - damaged - dirty
2.
Float
not working properly
3.
Float level
too high - too low
1. Clean - replace needle valve
2. Adjust float arm height - replace float
3. Adjust float arm height
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