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1977 Johnson 4hp model#4W77B, stalling at lower rpm’s

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  • 1977 Johnson 4hp model#4W77B, stalling at lower rpm’s

    I was wondering if anyone could help me figure what is going on. Hope to give enough info to make this clear. The low speed adjustment pin and high speed pin setting doesn’t seem to be the problem. ***uming a carb problem, removed it cleaned out bowl and all parts over winter but did not rebuild as gaskets and seals looked okay. Replaced the fuel pump 2 years ago, the plugs are older but very few hours on them since tuneup years ago. Powerpack was replaced at tuneup too. So after doing my best to position the rich-lean /high-low speed settings and getting the choke working properly, thought everything was all set. But once again once warmed up stalled when reducing to slow speed. Did use 93 octane gas with the synthetic oil. Seems like this shouldn’t be difficult to figure out but it is for me. ?

  • #2
    Ned to get compression checked may be getting low.
    Regards
    Boats.net
    Evinrude Outboard Parts

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    • #3
      Thanks for the info will get it tested.

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