Impeller help
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Impeller help

  1. #1
    21 Daytona Outlaw's Avatar
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    Default Impeller help

    Whats the best Impeller nut to use? I have a aluminum one and a steel one with a nylon insert/ nylock.

    Also is it normal for a new impeller to have a big ground down notch in the very outside diameter? is this for balancing?

    this is a new American turbine stainless one
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    TRG
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    I was curious about the same thing!...where mine was ground on was for balancing i was told.

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    Senior Member Need4Speed77's Avatar
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    Quote Originally Posted by toddnjuzz View Post
    I was curious about the same thing!...where mine was ground on was for balancing i was told.
    x2

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    Senior Member DuaneHTP's Avatar
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    Yes, the grinding on the side of the skirt is the most common way for a factory balance job to be done. Both nuts work just fine. The Aluminum nut is less likely to pull off the treads after being installed for a long time.

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    Horsepower sells Engines lefty's pride's Avatar
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    do you mean the machined surface at the wear ring? (like the rings on the pic or something else) i was told that the rings where machined into the impeller to help with sealing.
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    "Horsepower sells Engines but torque wins races."
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    21 Daytona Outlaw's Avatar
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    here is a pic of where it was balanced, apparently this is normal with a stainless impeller





    Last edited by Outlaw; 01-27-2010 at 07:09 PM.
    #55

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    Horsepower sells Engines lefty's pride's Avatar
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    OK obviously not what i was talking about, i with draw my statement. never had a SS imp. looks like balancing.
    "Horsepower sells Engines but torque wins races."
    "winners never quit, quitters never win
    those who never win and never quit are idiots"
    "if at first you don't succeed redefine success"
    "why is there never time to do it right, but there is aways time to do it twice"

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    that's where my aluminum impeller was balanced by amt, so its not just a ss thing.

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    Boat Nut sleekcrafter's Avatar
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    Thats normal production balancing, they are pretty spot on balanced too.

    If using the aluminum nut, or non locking type nut, be sure to put on some locktite or it will come loose.

    X 2 on the aluminum over the steel nut, saves the shaft.
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  12. #10
    B1 Racing cs19's Avatar
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    Outlaw, dont panic.. Its only balacing.. Its a good thing!

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    Senior Member Boat 405's Avatar
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    I thought this is what happens when you run the pump out of water.....

    Boat 405.

  14. #12
    Horsepower sells Engines lefty's pride's Avatar
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    nope, that is the way it came. in the early life of the boat it broke one of the grate rods and it destroyed the first impeller, it made it part way through the impeller and did i good number on the bowl. so my father ordered another impeller and it came with three groves machined in the surface, he called to find out why the old one had none and the new one had them they told him it was to improve the sealing, note the impeller that replaced that one did not have the groves. has any body else run in to this and have a story ?
    "Horsepower sells Engines but torque wins races."
    "winners never quit, quitters never win
    those who never win and never quit are idiots"
    "if at first you don't succeed redefine success"
    "why is there never time to do it right, but there is aways time to do it twice"

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    Senior Member tigertooth's Avatar
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    Quote Originally Posted by lefty's pride View Post
    nope, that is the way it came. in the early life of the boat it broke one of the grate rods and it destroyed the first impeller, it made it part way through the impeller and did i good number on the bowl. so my father ordered another impeller and it came with three groves machined in the surface, he called to find out why the old one had none and the new one had them they told him it was to improve the sealing, note the impeller that replaced that one did not have the groves. has any body else run in to this and have a story ?
    My pop; Jac Sea did that to all his impellers,and all wjr Jacuzzis came with it. I have seen several other people do it over the last 30 years of rebuilding pumps. It is supposed to help seal the wear ring. Dont really know if it works but it certainly doesnt hurt anything.

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    Senior Member DuaneHTP's Avatar
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    Those are known as a Libreth seal. They are supposed to break up the flow of water between two rotating surfaces. They may help some, but I've never found it to be a measurable amount. Duane HTP

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