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1996 90hp low compression

320bri

New member
The top cylinder has 136 psi

The top cylinder has 136 psi
2nd has 85psi
3rd has 90psi 4th had 80 psi
What should or was the compression when new. I got a manual and that talks about 75% difference between the cylinders.
Any ideal whats wrong.
Do the 90hp noted for a certain problems.

Thanks Brian
 
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