Reply To: 1929 Johnson A-45, 3 hp

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September 21, 2026 at 8:26 am #328860
GARY
Participant

    US Member

    I have several A45s and run them all.One thing common to them all is that the compression relief valves have all leaked.That plus the fact that there are no  crankshaft seals,means that the more use the motor has had,the harder it is to get it properly tuned.I don’t know that’s your problem,but something to consider.