Re: ’55 Johnson 25 hp head questions

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September 18, 2016 at 4:59 pm #44242
fisherman6
Participant

    US Member

    Richard,
    I’m sure someone else will chime in here. My first thought is to check the lower seal. Could be a little water intrusion washing the carbon out of the bottom cylinder. That would be my first thought. Compression variance or possibly spark strength may be a factor? Top cylinder running Cooler for some reason? Not sure I understand that weird line where the carbon stops at the bottom of the top cylinder… The head gasket looks like it was sealing properly so not sure what that’s from.
    -Ben

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