2004 Mercury two stroke 50 horse

by Russell Kampfer
(Mosinee, WI)

Misses at about 2000 rpm. Not sure if its just one cyl. or more. But I am inclined to think its just one. Plugs are new and look good (white/grey in color). I run high oct. gas without alcohol. I added some seafoam. I bought this used last year. Sometimes I have problems with the idle when warm.

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