Latest on 750 crank seals?
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  1. #1
    PWCToday.com Is My Home Away From Home Bruce in SB's Avatar
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    Latest on 750 crank seals?

    Are we still holding out for OEM seals or is there something else out there that are any good?
    What about the Pro-x kit from Blowsion?
    Thanks!
    "Thanks" to Chris Newmiller @ Newmiller Machine

  2. #2
    PWCToday.com Is My Home Away From Home Myself's Avatar
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    Re: Latest on 750 crank seals?

    I've been using WSM seals for over 10 years. I've never had any issues. They offer oem style, or teflon.
    http://www.facebook.com/twinlakesjetskirepair

    '89 Kawi 650SX 42.4 GPS
    +3" stock pipe, ported ex. manifold, drilled waterbox, blueprinted pump, Ocean Pro ride plate

    '99 Yama GP1200 65U 61.8 GPS
    ported cylinders, matched cases, milled head, blueprinted pump, long ride plate

    '96 Seadoo HX 717 53.13 GPS
    light porting, massaged cases, lightened flywheel, port matched manifolds, Rossier pipe, stubby pump cone

  3. #3
    PWCToday.com Is My Home Away From Home wmazz's Avatar
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    Re: Latest on 750 crank seals?

    Quote Originally Posted by Myself View Post
    I've been using WSM seals for over 10 years. I've never had any issues. They offer oem style, or teflon.
    With an inner and outer spring?


    Bill M.
    Horsepower == Speed, RPM != Speed



  4. #4
    PWCToday.com Is My Home Away From Home john zigler's Avatar
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    Re: Latest on 750 crank seals?

    We stock quality Japanese seals;

    https://watcon.com/products/crank-seal-1
    RCJS also doing business as WATCON
    608-743-1305 9am to 5pm CST m-f
    email watcon@watcon.com

    Please visit our web site

    new parts / products / services www.watcon.com
    thank you

    Please check out and like WATCON on Facebook

  5. #5
    PWCToday.com Is My Home Away From Home Myself's Avatar
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    Re: Latest on 750 crank seals?

    Quote Originally Posted by wmazz View Post
    With an inner and outer spring?


    Bill M.
    I don't know. My catalog just lists part numbers for regular, teflon (part# has T at end), and 'genuine ARS Made in Japan' (part# has J at end).
    Last edited by Myself; 03-05-2022 at 09:30 AM.
    http://www.facebook.com/twinlakesjetskirepair

    '89 Kawi 650SX 42.4 GPS
    +3" stock pipe, ported ex. manifold, drilled waterbox, blueprinted pump, Ocean Pro ride plate

    '99 Yama GP1200 65U 61.8 GPS
    ported cylinders, matched cases, milled head, blueprinted pump, long ride plate

    '96 Seadoo HX 717 53.13 GPS
    light porting, massaged cases, lightened flywheel, port matched manifolds, Rossier pipe, stubby pump cone

  6. #6
    PWCToday.com Is My Home Away From Home wmazz's Avatar
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    Re: Latest on 750 crank seals?

    Quote Originally Posted by Myself View Post
    I don't know. My catalog just lists part numbers for regular, teflon (part# has T at end), and 'genuine ARS Made in Japan' (part# has J at end).
    Is the teflon inside the seal?

    OEM Kawi had a hard red coating inside their seals on the
    750 and up. I thought it was a ceramic coating inside the
    seal.


    Bill M.

    Either way, a main seal with 2 springs is better than the aftermarket
    kawi 750 main seals I saw with a spring on the inner and a large dust
    seal on the front. It wasn't much better than a stock PP 440/555 front
    main seal.
    Last edited by wmazz; 03-08-2022 at 02:36 AM.
    Horsepower == Speed, RPM != Speed



  7. #7

  8. #8
    PWCToday.com Is My Home Away From Home Myself's Avatar
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    Re: Latest on 750 crank seals?

    Quote Originally Posted by wmazz View Post
    Is the teflon inside the seal?

    OEM Kawi had a hard red coating inside their seals on the
    750 and up. I thought it was a ceramic coating inside the
    seal.
    .
    Yes the Teflon is inside, and I think it is a reddish color. I'll have to see if I have any around the shop.
    http://www.facebook.com/twinlakesjetskirepair

    '89 Kawi 650SX 42.4 GPS
    +3" stock pipe, ported ex. manifold, drilled waterbox, blueprinted pump, Ocean Pro ride plate

    '99 Yama GP1200 65U 61.8 GPS
    ported cylinders, matched cases, milled head, blueprinted pump, long ride plate

    '96 Seadoo HX 717 53.13 GPS
    light porting, massaged cases, lightened flywheel, port matched manifolds, Rossier pipe, stubby pump cone

  9. #9
    PWCToday.com Is My Home Away From Home wmazz's Avatar
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    Re: Latest on 750 crank seals?

    Quote Originally Posted by Myself View Post
    Yes the Teflon is inside, and I think it is a reddish color. I'll have to see if I have any around the shop.
    That is encouraging!


    If only it was that simple, but it isn't. I have seen that list a long time ago.

    In about 1993 PJS became a Polaris dealer, and they had a multi-day seminar
    about the new Polaris watercraft line, the mistakes in the 1992 SL650, and
    especially the possible pitfalls of California moving towards using ethanol.

    Somewhere around 92, or 93 the main seals in the Laser Jet main seals were
    catastrophically failing. They were exact copies of the Kawasaki 440/550
    main seals, or so we thought. Kawasaki main seals were holding up, and not
    deteriorating like Polaris warned. But the PJS main seals were melting.

    My Father owned a Napa auto parts store since 1970, and between the
    automotive, motorcycle and watercraft industries it became clear that
    the automotive and motorcycle manufactures had more time to develop
    and fine tune their products, and use proprietary or patented manufacturing
    processes that was unavailable to the aftermarket even if was a "so-called"
    exact copy, and manufactured by the same company.

    However this was less of an issue for electronics. They just gave the part
    a new number, and if it had a different part number, it must be different


    Bill M.


    PJS was a SeaDoo dealer, back in ~1989.
    Horsepower == Speed, RPM != Speed



  10. #10
    PWCToday.com Is My Home Away From Home Myself's Avatar
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    Re: Latest on 750 crank seals?

    Found some new Kawi Teflon seals in the shop. These have a grey teflon and springs on both sides. Also have some new Seadoo teflon seals on hand for a fresh build and they have the reddish color.
    Attached Images Attached Images
    http://www.facebook.com/twinlakesjetskirepair

    '89 Kawi 650SX 42.4 GPS
    +3" stock pipe, ported ex. manifold, drilled waterbox, blueprinted pump, Ocean Pro ride plate

    '99 Yama GP1200 65U 61.8 GPS
    ported cylinders, matched cases, milled head, blueprinted pump, long ride plate

    '96 Seadoo HX 717 53.13 GPS
    light porting, massaged cases, lightened flywheel, port matched manifolds, Rossier pipe, stubby pump cone

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