1955 25HP Evinrude: How can I block off these ports?

Home Forum Ask A Member 1955 25HP Evinrude: How can I block off these ports?

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  • mr-asa


    Replies: 794
    Topics: 138
    #243755

    #43 and #45 on this diagram. #43 is easy, that’s pressure line for the gas can which I’m not using. I’m using an external pump so I don’t need the pressure from #43, but I also don’t need it spitting air-fuel mix everywhere. Can I just connect the two?

    • This topic was modified 2 years, 8 months ago by mr-asa.

    crosbyman

    Canada Member - 2 Years
    Replies: 3588
    Topics: 326
    #243770

    just install short piece of fuel hose on the air pressure nipple and insert (screw) a short bolt in it to seal it and install tye wraps to hold everything in place

    Joining AOMCI has priviledges 🙂

    • This reply was modified 2 years, 8 months ago by crosbyman.
    • This reply was modified 2 years, 8 months ago by crosbyman.

    fleetwin

    US Member - 2 Years
    Replies: 4737
    Topics: 46
    #243850

    I’m confused, why are there two nipples on the intake manifold? Is one of them for the cut out switch??


    crosbyman

    Canada Member - 2 Years
    Replies: 3588
    Topics: 326
    #243852

    possibly… a vacum is needed … I modified my comment o the air pressure nipple

    Joining AOMCI has priviledges 🙂


    David Bartlett

    US Member - 2 Years
    Replies: 571
    Topics: 24
    #243859

    Don is correct. One is for the vacuum switch.

    David Bartlett
    Pine Tree Boating Club Chapter

    "I don't fully understand everything I know!"


    mr-asa


    Replies: 794
    Topics: 138
    #243860

    What vacuum switch?


    David Bartlett

    US Member - 2 Years
    Replies: 571
    Topics: 24
    #243862

    Evan,

    On the 1954 motors there is a vacuum switch that shorts one set of points if the motor “runs away” in neutral. I think the 1955 motors had one also.

    David Bartlett
    Pine Tree Boating Club Chapter

    "I don't fully understand everything I know!"


    Mumbles


    Replies: 5764
    Topics: 298
    #243882

    What vacuum switch?

    This one. The motor will run just fine without it but it is there to prevent a runaway situation.

    DSC00046


    mr-asa


    Replies: 794
    Topics: 138
    #243888

    Ahh. Is a runaway condition in these something you have to worry about regularly?


    outbdnut2

    US Member - 1 Year (includes $3 online payment fee)
    Replies: 1705
    Topics: 91
    #243898

    I’ve seen this switch kick in if a motor gets rev’d too high in Neutral.
    Dave

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