4-9
4
Troubleshooting
Problem: Starting impaired
Condition
Remedy
1.
Slow jet
obstructed
2.
Slow jet passage
obstructed
3.
Carburetor
leaking air
4.
Choke valve
not operating properly
1. Clean jet
2. Clean passage
3. Tighten - adjust - replace gasket
4. Check - adjust choke/choke cable
Problem: Idling or low speed impaired
Condition
Remedy
1.
Slow jet
obstructed - loose
2.
Slow jet outlet
obstructed
3.
Pilot screw setting
incorrect
4.
Choke valve
not fully open
5.
Float height
incorrect
1. Clean - tighten jet
2. Clean outlet
3. Adjust screw
4. Adjust choke
5. Adjust float height
Problem: Medium or high speed impaired
Condition
Remedy
1.
High RPM “cut out”
against RPM limiter
2.
Main jet
obstructed
3.
Needle jet
obstructed
4.
Filter
obstructed
5.
Float height
incorrect
6.
Starter valve
not fully open
1. Shift into higher gear - decrease RPM speed
2. Clean main jet
3. Clean needle jet
4. Clean filter
5. Adjust float height
6. Adjust choke/choke cable
Problem: Overflow and fuel level fluctuations
Condition
Remedy
1.
Float valve
worn - damaged
2.
Float valve spring
broken
3.
Float
fuel logged
4.
Float valve
dirty
5.
Float height
too high - too low
1. Replace valve
2. Replace spring
3. Replace float
4. Clean valve
5. Adjust float height
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