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I'll return gauge and get a loaner from auto parts store.
I did as the manual said and tested on muffs. People locally have said I didn't have to check compression on a hose. This true?
Just traded for a boat, with 1978 Johnson 75hp. Checked compression all 3 cylinders have 80psi. boat will run in cooler temps once it gets up in the hot part of day it bogs down at 3000rpm and will not plane. Is 80psi the problem?
