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There are only two things I can think of that cause spark plug fouling:
- The fuel mixture is way too "rich."
- The "oil" rings on the piston are worn, allowing crankcase oil to get past and above the piston into the combustion chamber.
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∙ 14y ago
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Because it may be running too rich and it could foul out the spark plug Max, Phillips 14 Mayo Yukon
