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Thread: Shear pins for outboard motors

  1. #1
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    Default Shear pins for outboard motors

    people keep looking for a tuffer pin [ so it won't break] the Mfg put shear pins /, slip props, so the gear box won't break ,
    some thing has to give when you hit a rock, even on the slip props motors, that you can't beef it up there gear boxs will go out if you bang it lot , if you put shear pins that are stronger than the MFG use in there you are playing with fire an you get burned , [ long walk back ] 99 % of the time going at a slow speed you won't have a problem it is when you are up at a high speed [ canoe ? ] that is when you loose your gear boxes to rocks
    what I am trying to say is there is no free lunch when you put heavy shear pins [tuffer] be carfull as it will over stress your geag box when you hit the rocks [yes you will do it ]

    SID

  2. #2
    Member sayak's Avatar
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    Default

    True story. I've done that with a nail replacing a sheer pin. Messed up a decent prop on a Johnson 4hp that way, and was happy (in retrospect) to have not wrecked the gear box. Young and dumb.

  3. #3

    Default

    Quote Originally Posted by Sid View Post
    people keep looking for a tuffer pin [ so it won't break] the Mfg put shear pins /, slip props, so the gear box won't break ,
    some thing has to give when you hit a rock, even on the slip props motors, that you can't beef it up there gear boxs will go out if you bang it lot , if you put shear pins that are stronger than the MFG use in there you are playing with fire an you get burned , [ long walk back ] 99 % of the time going at a slow speed you won't have a problem it is when you are up at a high speed [ canoe ? ] that is when you loose your gear boxes to rocks
    what I am trying to say is there is no free lunch when you put heavy shear pins [tuffer] be carfull as it will over stress your geag box when you hit the rocks [yes you will do it ]

    SID
    Ayup. A 3/16" X 36" piece of brass brazing rod makes a lot of cheap OMC shear pins. They shear easy, maybe just a little too easy but are very forgiving on splines, gears and $150 props. Makes a guy pay close attention picking his path up through a white shoal but that's a good thing anyway. A lot of OMC motors came from the factory with brass shear pins. Zack

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