Quote:
Originally Posted by peiserma
As for compression, 75psi seems a little low, but it still might be enough to fire. Having the same psi reading on each cylinder is more important than an absolute number.
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Very true..but also keep in mind that this engine has been sitting for a while... It's likely that the rings are stuck in place from sitting.. To do a proper compression test start the engine and let it run for a while..
Let it come up to operating temp.. Then pull the compression test. It will give you a more accurate reading.
Additionally, If it were me I'd get a portable tank, fill it with fresh gas and oil and a double shot of Seafoam and run the engine with that gas for a while (15 mins or so) In a lot of cases the Seafoam will cut through the gunk and free up the rings.
DO NOT REV THE ENGINE while on earmuffs.. Idle speed only please..
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1987 V20 w/1987 150HP Yamaha on a Shoreland'r Trailer
1978 16.5 Airslot w/1996 120HP Force on a Four Winns trailer
1996 V21 w/1993 200HP Mercury on a Shoreline Trailer
All towed by a 5.7L Hemi Durango.
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