What’s a good compression test # for a 1940 Johnson 2.5 hp ?

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  • June 25, 2026 at 3:50 pm #322945
    Ned Middlesworth
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      My 1940 HA-15 Johnson 2.5 hp tested a 60# on both cylinders  in  a compression test.  I would think that is pretty good but I don’t have any info that says otherwise.  Any suggestions?

      June 25, 2026 at 4:56 pm #322947
      Don
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        Sounds reasonable for an old low compression outboard.  Oftentimes compression gages are inaccurate as well.

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