Impeller fitment problem
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Impeller fitment problem

  1. #1
    CAPTAIN KRYLON
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    LEWISVILLE TX
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    Default Impeller fitment problem

    Tried to put my pump together yesterday & ran in to a little problem.
    I couldn't get the gap between the impeller & the wear ring even close to where it needs to be.
    I usually try to get to .025. I am at like 1/8 of an inch.
    The thrust bearing is pressed all the way to the shoulder on the shaft.
    (Pulled the motor & checked it)
    I bought this boat dissasembled. Is it possible that my impeller is for a shouldered wear ring? ( have never seen one)
    I have a standard stainless wear ring in the pump.
    Tried to get a pic but it wouldn't turn out.

    Any Ideas?

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  3. #2
    Senior Member jetboatperformance's Avatar
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    Default

    Quote Originally Posted by TAYLORSS View Post
    Tried to put my pump together yesterday & ran in to a little problem.
    I couldn't get the gap between the impeller & the wear ring even close to where it needs to be.
    I usually try to get to .025. I am at like 1/8 of an inch.
    The thrust bearing is pressed all the way to the shoulder on the shaft.
    (Pulled the motor & checked it)
    I bought this boat dissasembled. Is it possible that my impeller is for a shouldered wear ring? ( have never seen one)
    I have a standard stainless wear ring in the pump.
    Tried to get a pic but it wouldn't turn out.

    Any Ideas?

    There are multiple small issues you might encounter depending on if the shaft has been prior modified/machined and whos shaft it is , what/whos impeller, if the impeller skirt has been machined etc , it does sounds like standard clearace for a stock pump. Shims wont take care of the problem but there are multiple solutions depending on exactly how much space you actually need to take up get to .025 call me if I can help explain Tom 805 466 4719

  4. #3
    B1 Racing cs19's Avatar
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    Default

    Machine the shaft shoulder to move the impeller forward. Not uncommon to have to machine .100 off to get the front clearance where you want it.
    B1Racing.net

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  6. #4
    DJG
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    Default

    If the shaft uses a thrust washer make sure it is on the proper side of the bearing.

  7. #5
    CAPTAIN KRYLON
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    Default Impeller

    Thanks guys for the input. That impeller is kinda tired. Worked out a good solution with Tom @ JBP

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