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Old 09-09-2008, 11:32 AM
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Spark Plugs

Ive had this happen twice now where my brand new spark plugs get fuel fouled (fairly heavy wet fuel fouled) and then wont fire. I cant get the engine to start or the plugs fire erratically and the engine runs like its running on 4 cylinders instead of 8. After I fix the carburetor/fuel issues and replace the plugs with brand new ones the engine starts fine and runs fine. Ive tried to clean the fuel fouled plugs (wipe with rag and let air dry) and reinstall them but that helps only a little. I just read a little bit of the NGK website and its says that if plugs get fuel fouled then to replace them.....it doesnt even say to try and clean them. My question is.....is how does the fuel affect the spark plug in such a way that it prevents (or hinders) it from firing? Why does this happen even if the wet fuel is wiped or dried away?

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Old 09-09-2008, 07:45 PM
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Excess Carbs

Tell me about your carburetor? How old? When was it rebuilt? Have you tried adjusting the mixture screws lately?

If the mixture isn't pretty close many engines won't start or run right. You are obviously running way too rich for some reason.

What kind of choke is on there? Manual? Electric? ?? If your choke stays on very long after running this will give you a rich condition and foul plugs.

Steve
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