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  1. #1
    scorp's Avatar
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    Crankshaft Opinions Please

    2000 genesis 1200 carbed

    I need to do a top end rebuild and the bottom end has about 100 hours on it,
    the crank seems to be in good shape, rods feel tight bearings smooth/quiet,
    should I let it ride or rebuild crank too?(don't really wanna spend xtra $$$)
    So how many hours is to many? and how many hours should they last?

    Thanks


  2. #2
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    If it feels good, no play in the rod bearings or the main bearings I would probably just run it. You could send it off to a guy like Jeff at Midwest Crankshaft and he could tear it down, inspect it, and replace what needs replacing if you want some peace of mind.

  3. #3
    RLACEMAN's Avatar
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    I've seen 2 stroke crankshafts on Polaris run at least 250 hours & they were still good, I would replace any seals on the ends though.

  4. #4
    Myself's Avatar
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    My rule of thumb on a 2 smoke PWC engine is 150-200 hours on a top end and double that on the crank. This would be assuming it's never had any lack of oil issues.

  5. #5
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    Quote Originally Posted by Myself View Post
    My rule of thumb on a 2 smoke PWC engine is 150-200 hours on a top end and double that on the crank. This would be assuming it's never had any lack of oil issues.
    Or rust

  6. #6
    Resident electronics hacker UnityRacing's Avatar
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    I won't replace a crank unless it shows wear. I wouldn't say there is a 'time limit' or anything like that.
    Feeler gauges are your best friend when doing a rebuild.

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