Thread: oily spark plug
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Old 11-16-2010, 07:17 PM   #2
SteveRand
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Join Date: Jul 2010
Location: Altadena, CA
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Default Re: oily spark plug

Hey Manny, a rich mixture will leave the plug with black soot, and it will be dry. Oil fouling is a wet, oily deposit. Oil in the combustion will also cause blue exhaust, while a rich mixture makes it black.

Check your compression. If it's low, and the plug is getting oil fouling, your rings are probably worn.

There should only be 1 qt of oil in the crankcase. is the inside of your air cleaner box clean?

How does the cart run with a new plug?
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