Re: 1977 Johnson 2 hp Piston ring gap

Home Forum Ask A Member 1977 Johnson 2 hp Piston ring gap Re: 1977 Johnson 2 hp Piston ring gap


fleetwin

US Member - 2 Years
Replies: 4737
Topics: 46
#71424

Jim
Sorry, don’t have a 1977 manual. But, the 1979 manual prescribes the ring end gap to be: .015" min-.025" max
The 1972 manual prescribes: .005" min-.015" max.
So, I guess we better find the correct 1977 manual to be sure.
I am assuming you are using OMC piston and rings. If not, I would look for the end gap recommendation from the manufacturer of the parts you are using….