Re: What should my cylinder compression be, 1987 Merc 115?


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Posted by smalliefisher on March 04, 2004 at 01:21:50:

In Reply to: What should my cylinder compression be, 1987 Merc 115? posted by Steve on March 03, 2004 at 20:11:40:

Just remove the plug you are checking, you are ok if the compression is relatively consistant across all the cylinders(+/- 10). If one is way lower, that one is toast. If you get it fixed, go ahead and have them all fixed. I would say that anything over 115psi is ok.


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