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Just wanted to add also that if you are using a low-cost compression test gauge, you may want to give a better gauge a chance. The low cost items don't seem to work too well on small displacement engines. Either the internal mechanism is too 'rough' and does not respond to small volumes, or the mechanism is too 'loose', and again doesn't respond properly. A larger piston/cylinder can flow a lot more air into the tubing and gauge than a smaller and still have a 'good' reading(at least for comparison to other cylinders), while a small displacement would be giving up a lot of its volume to the rubber tubing and gauge gizzards(relatively).
I bought one from -bay, and it read ~30psi, and when I used my old(~50) JC Whitney gauge, it read 75+ from memory. I got a refund for the low-cost unit.
tom
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vertical and above ground - my daily goal
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