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  1. #1
    mrbtd's Avatar
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    Sealing pump/nozzle surfaces

    When sealing the wear ring / to transom and pump to nozzle the manual refers to Gasket Maker is this what they mean ? I know I have read where some use Yamabond.

    If Yamabond which number ?
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    Last edited by mrbtd; 09-10-2007 at 09:30 AM.


  2. #2
    Brewster's Avatar
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    Yamabond 4 or a high quality marine silcone. Pump to transom seal I would use the Yamabond 4.

  3. #3
    Hydrotherapy's Avatar
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    i use 5200, sticks like chit to a blanket

    takes a while to re prep if removed but i know its sealed good, i blew out some older marine silicone and wont re use ever again...

  4. #4
    WATER WOODY's Avatar
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    I use Yamabond 4.Its made to hold 'pressure'.Its critical to seal the pump seams correctly.Losing pump pressure,(behind the prop),can yeild lesser performance.

  5. #5
    Vern's Avatar
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    How much performance is lost?? I have never sealed pump surfaces with anything ... I take it apart too often to want to bother with the mess. But if it is worth 1 mph or more, then I might ...

  6. #6
    Quote Originally Posted by Vern View Post
    How much performance is lost?? I have never sealed pump surfaces with anything ... I take it apart too often to want to bother with the mess. But if it is worth 1 mph or more, then I might ...
    +1

  7. #7
    All hail the Chief! fullboogie's Avatar
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    Not sealing the pump correctly before the impeller will result in burn marks on your pump liner. It will delaminate due to the air being sucked in. I chased this problem for a while before figuring it out, ultimately going through several new/used liners. It may be a pain to seal it every time, but it's the right way to do it.

    Use Yamabond. It's way easier to remove with a wire wheel on a drill than 5200, IMO.

  8. #8
    Caution raider fan in the area !!
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    good, to know.

  9. #9
    enforcer's Avatar
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    Quote Originally Posted by fullboogie View Post
    Not sealing the pump correctly before the impeller will result in burn marks on your pump liner. It will delaminate due to the air being sucked in. I chased this problem for a while before figuring it out, ultimately going through several new/used liners. It may be a pain to seal it every time, but it's the right way to do it.

    Use Yamabond. It's way easier to remove with a wire wheel on a drill than 5200, IMO.
    +1

  10. #10
    Vern's Avatar
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    That makes sense, avoids cavitation and burning the liner. On the RXP we have a rubber gasket that seals that quite well. I was thinking more of the seal from the pump to the venturi/thrust nozzle ... and how valuable is it to seal those two sections?

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