Reply To: Connecting rod bearings, 1956 Johnson 30 HP

Home › Forum › Ask A Member › Connecting rod bearings, 1956 Johnson 30 HP › Reply To: Connecting rod bearings, 1956 Johnson 30 HP

December 27, 2018 at 9:31 pm #161307
frankr
Participant

    The 1956 service manual did not specify piston grove clearance, but I just looked at a 1971 40hp manual and the spec is .0015 min to .004 max. I’d say you are just fine. I’ve seen way far more pistons with stuck rings than too loose.