OK what does the plug look like. Is it clean. The only other reason I can think of a misfire, with a clean plugs, is a hole in the exhaust manifold. I had that problem 14 years ago. What I did was turn off the raw water intake valve and have someone standby to open it. Cleaned all the plugs, then started the engine let it run for 30 seconds or so...mine ran perfect...had my buddy open the valve and she started to rattle. Steam was trying to put the fire out in the top end of mine, both 3 and 4. It's an easy check.
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Mo
"Odyssey"
1976 C&C 30 MKI
The pessimist complains about the wind.
The optimist expects it to change.
The realist adjusts the sails.
...Sir William Arthur Ward.
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