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Old 02-23-2014, 03:15 PM   #4
wuntunearlybko
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Join Date: Sep 2011
Posts: 74
Default Re: intermittent dead cylinder issue- vanguard 23hp

eh i went ahead and bought race fuel this morning so i could test. i only got a couple of gallons bc of cost. cleaned out the tank and fuel bowl to remove any junk and ran the new fuel hoping it would make a change. i still seem to have the same issue. i can feel the exhaust temp rise and fall, its kinda weird. i did check spark on both plugs and its good. swapped the plugs with each other and the front cylinder remains the culprit. they are a little dark but they dont look too bad. i will clean them up and try again. i will also try the mixture screw this afternoon and report back.

thanks guys
Jason
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