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  1. #1
    way2fast's Avatar
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    Installing Impellers

    I just came back from SD.net and noticed that the power to be is telling everyone to use red locktite when installing the impeller. I'm wondering how many do use it ? In my opinion this is absurd. I have always used an anti seizing compound on the the threads but NEVER locktite. The red makes a permanent bond and would have to be heated with a torch to remove the prop, possibly damaging the seals in the process. If the prop is torqued properly @ 83-84 lbs, the direction of prop rotation would make it practically impossible to loosen during use. If anyone had a prop unscrew on a PWC it was because they didn't bother to tighten it properly.
    The props on boats usually have a tab that bends down to lock the prop nut on. This is because in "reverse" the prop could possibly loosen. I have never seen a boat racer who used the tabs because they seldom need reverse and the tabs slow a quick removal. Nor do they use locktite. If a prop is lost, it's because of a snapped prop shaft, not a prop that unscrewed by itself.

    Richard


  2. #2
    Site Admin Green Hulk's Avatar
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    I don't use loc tite either!~

  3. #3
    Moderator Franko's Avatar
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    If I remember correctly, the prop spins clockwise whereas you spin the prop counterclockwise to loosen it. So how could the shaft spinning clockwise loosen a prop that tightens if spun clockwise?

  4. #4

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    How long does it usually take to replace the impeller? Just curious

  5. #5
    EZ Dock of Long Island Shibby1485's Avatar
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    with the right tools and a workbench or vice of some sort.... i guess 15 -20 minutes

    remove pump...
    put impeller tool in prop and take pump cone off, loosen and remove prop... put in new prop, tighten, pump cone back on
    re-install pump

    DONE

  6. #6
    I read that too! and just thanked Glen for the heads-up. I`ll have my pump off soon, so I`ll get a chance to see what`s up! if it`s tight or loose or if there is red lock tite on it...PR...

  7. #7

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    i've had many a pump to bits, i've never used locktight, never had any problems, 1991 to 2005, 201 pumps aprox done

  8. #8
    Moderator boataddict's Avatar
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    Richard,
    Don't boats use nyloc nuts on the props?
    Also, I have seen a prop come off in forward. I don't know how but it did. It may have been while slowing down.

  9. #9
    way2fast's Avatar
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    Quote Originally Posted by BOATADDICT
    Richard,
    Don't boats use nyloc nuts on the props?
    Also, I have seen a prop come off in forward. I don't know how but it did. It may have been while slowing down.
    The prop nuts on some motors are nyloc, which is good for about one tightening. Merc also uses the tab washer. Other companies use a cotter pin.

    I lost props before, but only when the prop shaft snapped from too much torque when jumping out of the water and re entry. I never had or saw anyone who lost one due to a properly tightened nut backing off.

    Richard

  10. #10
    Do use synthetic waterlproof grease to put on the impeller when you place it back on the shaft ?

    What greases or oils do you use when you replace the impeller ?

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