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

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June 25, 2026 at 7:51 pm #322956
JACQUES
Participant

    I have a 9.5 turtle that runs fine at 65 psi   PSI are very subjective .. different meters different rseults…. and  if the engine run well after 86 years I would not be to concerned.

    Joining AOMCI has priviledges 🙂