37
10. Check for bent throttle plate.
11. Adjust control cable or linkage, to assure carburetor
control.
12. Clean carburetor after removing all nonmetallic parts
that are serviceable. Trace all passages.
13. Check inlet needle and seat for condition and proper
installation.
14. Check sealing of welch plugs, and gaskets.
15. Adjust governor linkage.
16. Check float shaft for wear and float for leaks or
dents.
17. Check flywheel key for damage.
C. TROUBLESHOOTING CARBURETION.
POINTS TO CHECK FOR CARBURETOR MALFUNCTION
TROUBLE CORRECTIONS
Engine will not start 1, 2, 3, 4, 5, 6, 8, 14, 15, 17
Engine will not accelerate 2, 3, 17
Engine hunts (at idle or high speed) 3, 4, 8, 9, 14
Engine will not idle 4, 8, 9, 14
Engine lacks power at high speed 2, 3, 6, 8, 17
Carburetor floods 4, 7, 16
Carburetor leaks 6, 7
Engine overspeeds 8, 9, 14, 15
Idle speed is excessive 8, 9, 14, 15
Choke does not open fully 8, 9, 15
Engine starves for fuel at high speed (leans out) 1, 3, 4, 6, 15, 16, 17
Carburetor runs rich with main adjustment needle shut off 7, 16
Performance unsatisfactory after being serviced. 1, 2, 3, 4, 5, 6, 7, 8, 9, 15, 16, 17
1. Open fuel-shut off valve at fuel tank—Fill tank with
fuel.
2. Check ignition, spark plug.
3. Clean air cleaner—Service as required.
4. Dirt or restriction in fuel system—Clean tank and
fuel strainers, check for kinks or sharp bends.
5. Check for stale fuel or water in fuel - - Fill with fresh
fuel.
6. Examine fuel line and pick-up for sealing at fittings.
7. Check and clean atmospheric vent holes.
8. Examine throttle for binding or excessive play- -
Remove all dirt or paint, replace shaft.
9. Examine throttle return spring for operation.
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