View Full Version : Compression

06-16-2009, 01:22 AM
i am looking at 1987 85hp force.what would be considered good compression?

06-16-2009, 01:34 AM
Anything above 100 as long as they are all the same. These motors had almost exactly the same compression. I've seen scuffed pistons on one cylinder that only dropped the compression 7#.

06-16-2009, 02:07 AM
"ahoy william-m
thanks for adding to my very limited knowledge.as I will checking the motor later today,your quick response is greatly appreciated!
good boating,tugtim"