Re: 1977 Johnson 2 hp Piston ring gap

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February 23, 2018 at 4:15 pm #71470
Mumbles
Participant

    Jerry’s numbers seem more reasonable. I double checked my source and that’s what it said, 15 to 25 but doesn’t seem right. It could have been a typo. If you have a dealer nearby, they should be able to confirm the proper gap size for you.