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  1. #1
    Dave Sharp dav_dman's Avatar
    Join Date
    Aug 2005
    louisville Ky/so. IN

    how does the Rad4 shaft seal solve cavitation?

    on another thread it was reported by rad4 owners that cav probs are solved with this..

    can someone explain to me why? I never thought the drive shaft seal would cause air getting thru.. how does the rad4 solve that?

    thank you

  2. #2
    speedskixp's Avatar
    Join Date
    Feb 2008
    venice fl.
    The stock carbon seal will let air through from inside the hull under hard acceleration and the rad 4 and others like it will not.

  3. #3
    Prohibido usuario
    Join Date
    Aug 2005
    Jerry's guest bedroom
    The carbon seal is more like a gasket, put enough vacuum on the pump side and it will leak air from the hull.

  4. #4
    Ride Hard! aha's Avatar
    Join Date
    Jul 2005
    Covina, Ca
    To add to this thread, the Rad 4 seal has 3 seal's that really help to prevent air/water from entering the hull.

    Seadoo should find a better way of doing it.

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