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Discussion Starter · #1 ·
The middle cylinder spark plug gets fouled about every 5-10 hours of use. It looks like someone takes it out, hits the end on the ground and puts it back in. The other 2 spark plugs are fine. Basically the metal prong is pushed against the electrode. Any ideas what could be causing this? Runs about 57-59 mph then dies without warning. Once plug is replaced, back up and running strong.
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