Mercury 275 outboard low compression

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danimal123

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Joined
Dec 2, 2007
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Just bought a 1992 275 Merc. Motor hasn't been run in God knows how long. Did a cold compression check and got 95 PSI on all six cylinders. This seems low but they are all literally identical. It is a Cogsworth. Anybody??
 
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Laddies

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Joined
Sep 10, 2004
Messages
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Re: Mercury 275 outboard low compression

Chances are the cyls. are dry from poor or no winterizing prelube it and let it run a few minutes and I think it will jump back up for you.
 
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