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I have a vintage Johnson Javelin that I hope to restore. I know that compression should be nearly equal in both cylinders, but, I was also curious as to an approximate range for normal compression. My motor has 60 psi on one cylinder and only 40 on the other. While I knew from just pulling...
I recently acquired this motor that had been converted to a fuel pump setup. The motor has stopped working and I'm thinking the fuel pump conversion is the problem. The job on this motor seems to have been done differently than the pictures I've seen on this forum of other fuel pump...
