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<blockquote data-quote="crazymanme2" data-source="post: 212232" data-attributes="member: 1634"><p>You hear people talk about compression numbers.Do any of you people know what a newer motor compression numbers are #-o </p><p></p><p> A newer 25hp Merc will have around 145 to 150 #'s.I have purchased older Mercs & have had compression readings around those numbers also.Some times the rings may be stuck, but a little Marvel Mystery oil will take care of that if not too bad.I have a 1974 85hp Merc that the numbers are around 160# with no motor work done.</p><p></p><p>You have to make sure you have a good compression gauge.I use a Snap on.</p><p></p><p>So when somebody says 125# is not that good, I feel the same way.</p></blockquote><p></p>
[QUOTE="crazymanme2, post: 212232, member: 1634"] You hear people talk about compression numbers.Do any of you people know what a newer motor compression numbers are #-o A newer 25hp Merc will have around 145 to 150 #'s.I have purchased older Mercs & have had compression readings around those numbers also.Some times the rings may be stuck, but a little Marvel Mystery oil will take care of that if not too bad.I have a 1974 85hp Merc that the numbers are around 160# with no motor work done. You have to make sure you have a good compression gauge.I use a Snap on. So when somebody says 125# is not that good, I feel the same way. [/QUOTE]
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