64 Johnson 5.5 hp Powerhead Base Gasket Problem

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  • June 22, 2020 at 9:01 pm #206456
    jerryswiss
    Participant

      Compression is good, I cannot remember what it is, but I checked it when I first got it.

      To test the head gasket i turned the power head upside down, filled all the water passages with water, took the spark plugs out, blew air in the holes, and looked for bubbles in the water. Nothing.

      Not sure what else to do.

      June 22, 2020 at 11:42 pm #206487
      Mumbles
      Participant

        A compression test might not show a leaky head gasket. Probably best to pull the head and inspect all of the surfaces carefully. At least you’ll know your head gasket is good after you replace it.

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