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  1. #1

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    Pumpshoe/transom seal question!?

    Hi!
    I just wonderd if I should seal up the cap between the pumpshoe and transom?
    I have sealed the pumpshoe and transom, and also made a own pumpseal kit to fill in the holes, but not in the back..

    Why I wonder is because I have some serious cavitation problems, and I think this could be the problem??


  2. #2

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    Forgot the pic
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  3. #3
    Its better to burn out than fade away christian79's Avatar
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    The transom seems too low. When you sealed it, did you insure that all three tabs around the transom are lined up with and touching the tabs on the hull?

  4. #4

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    Yes I thought this also looked strange.. I don´t know if the pictures justify i right.. I will remove the pump today to have another look and maybe re-seal everything just to be sure.

    But is there diffrent pumpshoe´s?

    Should this cap be sealed???

  5. #5
    Prism's Avatar
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    That is your problem. There is usually a felt piece that comes stock in that area. The felt usually blows out and falls off. When sealing a pump shoe, the felt seal is removed and the area is sealed with sealer. (5200,4200 etc) When the felt comes loose or the area isn't sealed, massive cavitation is the result. After looking at your picture, has the shoe been modified at all? It looks like either the shoe is up really high or the transom is low. It may just be the way the picture looks too. Just wondering.

  6. #6

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    Nothing is modified as far as I know..
    And about that little felt packing, I thought it didn´t was needed after I have sealed everything and filled the holes in the shoe..

    So if just both the transom and pumpshoe lines up right I could just fill the cap with seal to make it 100%.

  7. #7
    Moderator DrewNJ's Avatar
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    Looking at those pics it does not look like the shoe is sealed... When I do mine I have 5200 coming out everywhere. So that gap you have taped off has 5200 oozing out that gets cleaned up, but is filled. The back part of the shoe is probably the most improtant part about sealing the shoe correctly...
    If it were mine, I'd pull the shoe back out, clean everything up and use more 5200 on all of the mating surfaces of the shoe, especailly the big flat areas in the back.

  8. #8
    Hydrotoys's Avatar
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    or pull the transom off, and flood the crap out of that area.

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