Question about Craftsman 17.5 hp 42 in. Deck Lawn Tractor - CA Model

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WONT START GOOD SPARK SPITS OUT OF CARB

WILL NOT START, SPITS OUT CARB, WE HAVE GOOD SPARK, LEAK DOWN TEST YEILDED POR RESULTS. GOOD COMPRESSION 175 LBS , THINKING ELECTRONC NEEDLE VALVE MAY NOT BE FUNCTIONING CORRECTLY / NEED SOME TYPE OF DIAGNOSTIC MANUAL

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This problem can't be the anti-diesel solenoid in the carb, that only does anything when the engine is shutting down.
Because you got poor results in the leakdown test and get 175 psi of compression (way too much), I suspect that either your intake valve is bad or misadjusted, or the key that holds the flywheel to the crankshaft is sheared off.
Check the valve lash settings and visually inspect the operation ov the valves while you're setting them. If the valves are OK remove the flywheel and check the key.

Carl

Posted on Dec 11, 2008

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