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Message: <blockquote data-quote="6brnorma" data-source="post: 87932" data-attributes="member: 5914"><p>I had to check with Continental this morning on some other unrelated issues so I asked them to verify compression ratings. They told me exactly what I had noted in my manual. A good running engine should be up around 120……they don't like them to fall below 100 and 80 is definitely low. Most importantly is balance of compression between cylinders……I've had a couple that had all 85s and ran for quite a while longer. You have low/very low compression but I'd still look or electrical issues before I gave up on the engine entirely.</p></blockquote><p></p>