RBM thread size?

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  • frankr
    frankr


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    #190554

    Anybody know the thread size on a 1918 Evinrude RBM Carb needle valve screw? Looks like #12 x ??tpi but I have nothing to try in the hole. I need to make a needle valve to replace the missing one.
    Frank.

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    RICK EICHRODT

    US Member - 2 Years
    Replies: 205
    Topics: 47
    #190561

    Talk to Chris Scratch. I believe he has made a few and would know the thread size. Also check with Brook Newcomb as he is the SIG leader for Evinrude RBM’s.

    Tubs
    Tubs

    US Member - 1 Year
    Replies: 3158
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    #190567

    https://www.enginads.com/otto/

    You're only as smart as the person you're talking to.

    • This reply was modified 9 months ago by TubsTubs.
    Tubs
    Tubs

    US Member - 1 Year
    Replies: 3158
    Topics: 172
    #190568

    Or Richard White. A machinist heavy into Evinrude RBM’s. I got rid of the ones I had.

    You're only as smart as the person you're talking to.

    frankr
    frankr


    Replies: 5303
    Topics: 48
    #190708

    I turned a 12-24 thread on a piece of rod and it screwed right into the carb. So I went ahead and made a needle. Should oughta work.

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