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Re: Engine Trouble
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Posted by john d. on June 04, 1999 at 11:49:41 from (206.141.74.34):
In Reply to: Engine Trouble posted by Bill Yungk on June 04, 1999 at 08:28:28:
I had a Wheelhorse with the Kohler 12hp engine, and it had an exhaust valve problem that sounded a little like this. The engine would run like a bandit until it got REALLY hot under a heavy load, and suddenly the power went away. Sometimes it would even coast to a dead stop. After about 5 minutes of silence, I'd hear a "PING" and then it would start. The exhaust valve was sticking open when it got very hot, and the compression was gone. A valve job (with a new valve) cured it. A spark plug that misfires when it gets too hot will produce a similar loss of power under load.
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