Starter mount bracket on engine case broke 92 Yamaha WR3
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  1. #1
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    Question Starter mount bracket on engine case broke 92 Yamaha WR3

    Picked up a 92 Yamaha WR3 the starter mounting bolt hole on the crankcase is broken, the treads are gone and half of the bolt hole is broke off. What are some options here to fix this? I've got a spare crankcase but just wondering if anyone else has been able to "fix" the broken bolt hole besides replacing the crankcase.

  2. #2
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    Re: Starter mount bracket on engine case broke 92 Yamaha WR3

    Haven't done this exact repair myself, but it sounds like you need to weld the material back on there and tap a new thread. There's enough torque from the starter motor that some cheesy repair like JB Weld has no chance of holding.
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  3. #3
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    Re: Starter mount bracket on engine case broke 92 Yamaha WR3

    Haven't ever welded but the bigger problem is that the other half is not available, I'm not sure where it ended up but when I pulled the motor it wasn't in the hull. So my option was to replace the crankcase.

  4. #4
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    Re: Starter mount bracket on engine case broke 92 Yamaha WR3

    any good tig welder can fix this , you take a carbon rod smaller than the bolt size and put it in what left of the bolt hole then tig around the carbon rod, remove the carbon rod, drill and tap the hole to the correct size, install and ride
    Y'all know me, still the same O.G. but I been low-key
    hated on by most these &^$$@s with no cheese, no deals and no G's, no wheels and no keys, no boats, no snowmobiles, and no skis, mad at me cause I can finally afford to provide my family with groceries

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  5. #5
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    Re: Starter mount bracket on engine case broke 92 Yamaha WR3

    Here is a couple of photos of the damage, threads on the piece still left are pretty much corroded away. So a good tig welder could fix that mount? That's nice to know, I'll have to see what a welder would cost me to do that.

  6. #6
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    Re: Starter mount bracket on engine case broke 92 Yamaha WR3


  7. #7
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    Re: Starter mount bracket on engine case broke 92 Yamaha WR3

    yes there is easily enough there to work with, like I said earlier any skilled tig welded should be able to fix that
    Y'all know me, still the same O.G. but I been low-key
    hated on by most these &^$$@s with no cheese, no deals and no G's, no wheels and no keys, no boats, no snowmobiles, and no skis, mad at me cause I can finally afford to provide my family with groceries

    I was 300SXing when 300SXing wasn't cool !

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