Fixing an impeller
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Fixing an impeller

  1. #1
    custom member raped southwind's Avatar
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    Default Fixing an impeller

    I have hit a brick wall today. Finally got the impeller off and this is what i have found. Not sure if its worth fixing but i cant afford the new ss Impeller this yr. I have an alum impeller but i think that will do more harm then good. Any advice or sugestions. Trying to get back on the water this yr!

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    Senior Member 67weiman's Avatar
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    If you are worried about running an alum impeller, I would defiantly toss that one in the trash. What kind of power are you running?

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    Senior Member HBInHeat's Avatar
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    Stainless is repairable.but that almost looks like really bad casting flaws.

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    Blown, OHBA Member Wild Hair's Avatar
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    I don't think I would put that back in if it were mine I would opt for an aluminum to finish out the season,and be looking into another stainless and wear ring for next season.
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    custom member raped southwind's Avatar
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    motor is a 496 that soposedly made roughly 700 on dyno. Id say more along the lines of 600 but wont have an accurate guess untill i get the specs off the cam. None of the holes are burnt through. its mainly on the surface that mates to the wear ring and then the outer edge. What causes this. It was in a little 18ft with a 396????

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    Senior Member 67weiman's Avatar
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    A guess, casting flaws. How old is that impeller?

  9. #7
    Senior Member 67weiman's Avatar
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    Quote Originally Posted by raped southwind:1686382
    motor is a 496 that soposedly made roughly 700 on dyno. Id say more along the lines of 600 but wont have an accurate guess untill i get the specs off the cam. None of the holes are burnt through. its mainly on the surface that mates to the wear ring and then the outer edge. What causes this. It was in a little 18ft with a 396????
    What rpm's did you turn it? Wait, I'm confused. 496 or 396?
    Last edited by 67weiman; 08-01-2012 at 04:48 PM.

  10. #8
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    Quote Originally Posted by 67weiman View Post
    What rpm's did you turn it? Wait, I'm confused. 496 or 396?
    New motor is 496. The pump came out of an avenger with 396. dont know rpm of the old motor!!! age is unknown!

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    Senior Member SBS933's Avatar
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    Default Whoa

    That definitly not electrolisis, looks like crap stainless. I have seen cavitation damage like that before. A few years back we had a lot of problems due to taking lead out of impellers and not getting the new formula right. They have got it right these days though.

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    custom member raped southwind's Avatar
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    Totally shitty. Only pitting on the impeller is where it's shown. Leading and trailing edges are immaculate .

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    Thinking about tig welding the holes, chucking it in the lathe and then having it rebalanced? Anyone see a problem with doing this and who can re balance it. Or am I gonna be stuck with the old school bubble balance concept?

  14. #12
    Senior Member SBS933's Avatar
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    Default What ?

    Quote Originally Posted by raped southwind View Post
    Thinking about tig welding the holes, chucking it in the lathe and then having it rebalanced? Anyone see a problem with doing this and who can re balance it. Or am I gonna be stuck with the old school bubble balance concept?
    If your lucky that impeller will turn into a sharp meat grinder,otherwise it could grenade. I would keep iy on your workbench and see how many people ask questions. Take another route.

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    Senior Member Futs's Avatar
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    Quote Originally Posted by raped southwind View Post
    Thinking about tig welding the holes, chucking it in the lathe and then having it rebalanced? Anyone see a problem with doing this and who can re balance it. Or am I gonna be stuck with the old school bubble balance concept?
    Take it to MPD and see what Jack has to say about it. I know what i would do with it, but jack might be able to save it, if not he will tell you straight up!

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    Quote Originally Posted by Futs View Post
    Take it to MPD and see what Jack has to say about it. I know what i would do with it, but jack might be able to save it, if not he will tell you straight up!
    Send it to Jack. If it's worth fixing, he will do it right. If it's not worth fixing, he will tell you.

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