I bought a boat a while back and the guy gave me a 35 Evinrude that he had. Said he thought it had a hole in the piston and he never messed with it. I just got around to looking at it today and it does only have 65# of compression but it has that on both cylinders. I am thinking a bad head gasket being as both cylinders are the same. Do you think thats possible? Never replaced a head gasket on anything bigger than a 9.9 Johnson but willing to give it a shot if its maybe all thats wrong. I did check for spark and it will jump a 3/8 inch gap on both cylinders so that was a good sign.
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