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  1. #1

    Pump cone and metal bushing to keep tail bearing tight

    I have read allot about this rear bearing outer race moving , I have my pump out and disassembled an I am wondering why someone hasn't developed a metal bushing that goes between the outer cone and outer bearing race to secure it and give it more support and hold the rear end of the shaft true. Now I hear they are doing a o -ring between cone and bearing race on the new 300's-huh?


  2. #2
    Moderator #985 lasportsmn's Avatar
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    It is great to see you coming ip with a great new idea that may be the next best thing for our skis. Please through our encouragement bring your idea to reality and get it designed and tested. Let us know how it works.

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  4. #3
    nicjak's Avatar
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    Sorry but never heard of there ever being a problem

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  6. #4
    Well I tell ya what, take your pump apart and only have the rear bearing and shaft in place in the pump with nothing else. Grab the opposite side of the shaft and move it around and feel the play that is there. I bought several sizes of O-rings from the local hardware store and experimented with them and once the right size was installed that play was gone. My only question now is what kind of heat do these pumps build and if that o-ring can take it but it does feel allot more solid.

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    Moderator #985 lasportsmn's Avatar
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    I am not aware of ayone testing pump temps while in operation but when you get this information please share it with us.

  8. #6
    UltraKvz's Avatar
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    I think it was designed to float like that.

  9. #7
    Why? With the rpm's these things are spinning wouldn't you want the shaft as secure as it could be? That bearing race spinning is gonna wear out the pump housing over time, I think it has been long overlooked.

  10. #8
    nicjak's Avatar
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    It doesnt spin nor wear the housing, the tail cone applies pressure securing it..

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  12. #9
    Take the time to smile sirbreaksalot's Avatar
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    Quote Originally Posted by rcj600 View Post
    Why? With the rpm's these things are spinning wouldn't you want the shaft as secure as it could be? That bearing race spinning is gonna wear out the pump housing over time, I think it has been long overlooked.
    You are worring about something that is NOT an issue.
    I have pulled 15f pump down with 290 + hrs and not once have been able to feel any lip or wear on the hoisings.

    Waz

  13. #10
    The tail cone when installed leaves a1/8 inch gap and does not seat against the bearing-FYI

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