Reply To: 1929 Johnson A-45, 3 hp

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September 21, 2026 at 3:57 pm #328875
Buccaneer
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    US Member
    JOSEPH BRINCAT wrote:

    I never had an appreciation for the backfire suppression screens until I happened to be reading an old book about two cycle marine engines. Looking at the section drawings and descriptions for the various two port 2 cycle engines they all seem to have baffle screens in the by-pass passages to prevent firing into the crankcase. … just saying !

    Joe B

    Maybe that core plug it blew out of the carb was the Relief Valve!

     

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