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  1. #1
    yamacruiser's Avatar
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    Prop hitting the wear ring

    Hello everyone, i need some quick technical advise not sure if i am in the right section but here it goes.

    I have an 03 and 06 yamaha fx. I interchanged the whole pump units and props between both skis. Reason for doing so the 03 had upgraded parts which i wanted on my 06 since it is the 1 ill be keeping. Everything went smooth for the 06 cranks as it should and no noise everything smooth.

    Today i finished the 03, once i put it together i cranked it on and this horrible metal screeching sound from the prop hitting the metal wear ring. I dont know why its happening cause on the 06 this set up was working perfect. Only thing that comes to mind is a stripped bolt that attaches the wear ring to the transom plate was stripped. I torqued everything down to spec. Could a stripped bolt that holds the wear ring cause the mis aligment and make the prop touch the wearing when turned on?

    It is the only thing that comes to mind, any help would be highly appreciate it thanks.


  2. #2

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    is your shaft located correctly in the pump. make sure your pump bearings are ok.

  3. #3
    Hydrotherapy's Avatar
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    Stock linner has mole hills caused by salt getting in,check and replace IMO

  4. #4
    fx160's Avatar
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    As well as checking linner for blistering
    Make sure the shaft lengths in the pumps are the same
    The later one may have the 2" extension

  5. #5
    yamacruiser's Avatar
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    Before the swap both units where working flawless, no issues at all. I think the bearing and stock liner issues might be out of the question for now. I had both shafts with props and vane assembly next to each other and they are the same lenght for sure.

    My concern here is 1 out of 4 bolt that holds the 2 inch spacer and the stock liner to the transom mount got stripped in the torquing process. Could this cause just enough of a misaligment under load for the prop to hit the wear ring?

  6. #6
    mcdog's Avatar
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    It is possible. Especially if there were some minor warping already there from salt. Is it a saltwater ski?

  7. #7
    big john's Avatar
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    could be slightly misaligned, try loosening up the pump and move it around, it was ok before swapping it from one to the other, its going to be something simple

  8. #8
    mjh3ides's Avatar
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    Quote Originally Posted by Hydrotherapy View Post
    Stock linner has mole hills caused by salt getting in,check and replace IMO
    +1

    This is my guess too. You probably didn't notice it before the swap because the prop you were originally using with that wear ring had already been worn down from hitting the high spots. Don't run it like that or you'll mess up your 2nd prop too. It's a common problem with the OEM wear rings for people who ride in salt water. Corrosion starts between the stainless liner & aluminum housing & causes it to bulge. Riva sells a solid stainless wear ring for close to the cost of a replacement OEM, & you'll never have to worry about corrosion bulges again.

  9. #9
    yamacruiser's Avatar
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    So the stripped bolt that is not holding its side against the transom wont be the issue?

  10. #10
    fx160's Avatar
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    It won't help
    But I don't think it's the cause
    If your worried swap the linner with your other one

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