what year? and whats wrong?

merc6cyl

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Joined
Sep 19, 2007
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1
mid 80's i'm thinking.

Vin# A174912

6 cylinder.



Was running fine, taking a cruise and then it just started bogging, won't go above 2500 rpm. seems to run fine at idle.

Put a spark plug tester on it, and when it is revved up the spark seems to loose its consistency. skips too.

Sounds like its only running on a few cylinders?

Its for a commercial lobstering boat, so any fast help would be appreciated.
 
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