Reply To: Johnson AB 25 Help

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July 3, 2019 at 11:09 pm #178387
GARY
Participant

    US Member

    I don’t have a good idea of an exact minimum compression number,the important thing is that the cylinders are pretty equal.I would think anything above 60 would be good enough to get it to start.The assumption is that if the compression numbers are good then crankcase is also.The other thing to check is for badly worn crank bearings.Try pushing the flywheel from side to side to check that.