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 ]
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.
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
Originally Posted by Sid