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1983 35 hp Evinrude
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<blockquote data-quote="MrGiggles" data-source="post: 472207" data-attributes="member: 22613"><p>If it runs good, why worry?</p><p></p><p>The problem with testing engines of small displacement, the volume of the tester hose adds to the combustion chamber volume, lowering the compression ratio. Unless you have a tester with the Schrader valve in the tip at the very end of the hose, you'll get false low readings.</p><p></p><p>I generally don't put much faith in the actual numbers of a compression test, variation between cylinders is what matters the most.</p></blockquote><p></p>
[QUOTE="MrGiggles, post: 472207, member: 22613"] If it runs good, why worry? The problem with testing engines of small displacement, the volume of the tester hose adds to the combustion chamber volume, lowering the compression ratio. Unless you have a tester with the Schrader valve in the tip at the very end of the hose, you'll get false low readings. I generally don't put much faith in the actual numbers of a compression test, variation between cylinders is what matters the most. [/QUOTE]
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