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  1. #1
    VdeKock's Avatar
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    Impeller pitch problem

    I have 2 problems with my impeller.

    #1 it was made 50thousands SetBack, but now its hitting the pump stator.
    i have to place the original spacer ring between it, wat was never there....
    so now i have more distance between prop and pump house.


    picture 1&2
    Click image for larger version. 

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    #2 My pitched impeller is not turning in my wear ring....(wear ring is 1year old OEM)
    it was originally a 14/20 and pitched to 14/23.
    The engine can't spin the prop, and stalls. Also there is a gap between the pump and the 2" extension what
    i cannot close because
    the prop doesn't move further inside the wear ring..


    My friends 14/21 spins with no problem. The 14/23 was a new 14/20 prop and pitched up


    picture 3&4
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    Wat are my options..????? Wrong pitch??




    I just read that the diameter grows when pitch up... (
    duhh of course)
    shouldn't this be compensated by the pitcher.

    Not easy to make it fit and keep it round by myself..
    Last edited by VdeKock; 02-17-2014 at 03:14 PM. Reason: picture fixed


  2. #2
    Happily Self-Employed WFO's Avatar
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    Cant see the pics, but if you take material off the intereior hub of the impeller, you must run the washer. Hell, I run the washer on all my setups because without it the impeller will just about weld itself to the driveshaft hub, and you cant get it off

    Yes, a dynafly impeller diameter will grow when you pitch up. When we pitch those, we have to recut the diameter to fit the wear ring. Yes most shops should cut the diameter, depending on who you sent it too

  3. #3
    VdeKock's Avatar
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    pictures should work now

    The prop was pitched by Jim,
    How much do you take off... after bending from 14/20 to 14/23? Have to try myself.

    I also spotted a YG-DF 15/22 on Ebay, Can a ported EFI 1300 spin it? What are the ups and down of a 15

  4. #4
    Happily Self-Employed WFO's Avatar
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    Quote Originally Posted by VdeKock View Post
    pictures should work now

    The prop was pitched by Jim,
    How much do you take off... after bending from 14/20 to 14/23? Have to try myself.

    I also spotted a YG-DF 15/22 on Ebay, Can a ported EFI 1300 spin it? What are the ups and down of a 15
    you can fix the impeller yourself... use a larger flat file, and it should only hit on the last inch or so of the blade... just remove material going from front to back of the outer flat edge of the blade, a little at a time until it clears without touching

    it shouldnt take much, as Jim does good work and gets them pretty close

    yes, a ported 1300 can turn a 15 leading edge, but you are still going to be a little small on the trailing edge (22)

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