| PROBLEM |
POSSIBLE SOLUTION |
- Engine hunts (at idle or high speed)
- Carburetor Leaks
|
Examine idle and main mixture adjustment screws and O-Rings for cracks and damage.
|
- Carburetor out of adjustment
- Engine will not start
- Engine will not accelerate
- Engine hunts (at idle or high speed)
- Engine will not idle
- Engine lacks power at high speed
- Engine overspeeds
- Engine starves for fuel at high speed (leans out)
|
Adjust main mixture adjustment screw; some models require finger tight adjustment
|
- Carburetor out of adjustment
- Engine will not start
- Engine will not accelerate
- Engine hunts (at idle or high speed)
- Engine will not idle
- Engine lacks power at high speed
- Idle sped is excessive
|
Adjust idle mixture screw
|
- Carburetor out of adjustment
- Engine will not idle
- Idle speed is excessive
|
Check for bent choke and throttle plates
|
- Engine will not start
- Engine hunts (at idle or high speed)
- Engine will not idle
- Engine overspeeds
- Idle speed is excessive
- Engine starves for fuel at high speed (leans out)
|
Adjust control cable or linage, to assure full choke and carburetor control
|
- Carburetor out of adjustment
- Engine will not start
- Engine overspeeds
|
Clean carburetor after removing all non-metallic parts that are serviceable.
|
- Carburetor floods
- Engine starves for fuel at high speed (leans out)
|
Check inlet needle and seat for condition and proper installation
|
- Carburtor leaks
- Engine overspeeds
- Idle speed is excessive
|
Check sealing of welch plugs, caps, plugs and gaskets
|
- Carburetor out of adjustment
- Engine will not idle
- Engine lacks power at high speed
- Carburetor leaks
- Engine overspeeds
|
Adjust governor linkage
|
- Engine hunts (at idle or high speed)
- Engine will not idle
- Engine lacks power at high speed
- Carburtor floods
- Engine starves for fuel at high speed (leans out)
|
Adjust float settings if float type carburetor
|
- Engine hunts (at idle or high speed)
- Engine will not idle
- Carburetor floods
|
Check float shaft for wear and float for leaks or dents
|
- Engine will not start
- Engine will not idle
- Engine lacks power at high speed
- Carburetor floods
- Idle speed is excessive
|
Check diaphragm for cracks or distortion and check nylon check ball for function if available
|
- Engine hunts (at idle or high speed)
- Engine lacks power at high speed
- Carburtor floods
- Idle speed is excessive
- Engine starves for fuel at high speed (leans out)
|
Check sequence of gaskets and diaphragms for the particular carburetor being repaired
|
