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Discussion in 'Bubba's Outboards' started by shawn 314, May 3, 2009.
do any of you know what the compression should be on a 1973 50hp johnson?
Any thing from 90 or above will suffice as long as there is no more then 10 lbs between cylinders. The cylinders need to be pretty close to run even and the higher the number the easier it is to start.