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OMC compression spec needed

alan

Contributing Member
" I just finished doing a comp

" I just finished doing a compression test on my '85 Johnson 120, Each cylinder is reading within 1 lb. The two port cylinders read 125 lbs, and the two starboards read 124 lbs.

What is the compression spec for a new motor ? Thx. "
 
"Alan.... There is no set psi

"Alan.... There is no set psi reading, but the desired readings are approximately 100+ psi and even on all cylinders. From experience I can say that your engine has perfect compression.

Joe (30+ Years With OMC)"
 
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