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Thread: Case sealant

  1. #1
    PWCToday Newbie
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    Case sealant

    Totally forgot to order some when i placed order with SBT. What can i get from local auto parts store that will work? I have Autozone, parts plus and advance auto local to me.

  2. #2
    PWCToday.com Is My Home Away From Home Myself's Avatar
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    Re: Case sealant

    Motoseal 1 Ultimate.
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  3. #3
    PWCToday.com Is My Home Away From Home kcr357's Avatar
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    Re: Case sealant

    I like loctite 518
    How many gerbils could a gerbil jammer jam if a gerbil jammer could jam gerbils?


    "You build cheater motor's & still get smoked !!!!"
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  4. #4
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    Re: Case sealant

    What do you guys suggest to use on all case bolts?

  5. #5
    PWCToday.com Is My Home Away From Home Myself's Avatar
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    Re: Case sealant

    A dab of blue Loctite every nut or bolt.
    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
    Top Dog Benflynn's Avatar
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    Re: Case sealant

    Go to yamaha dealer and get yamabond4

  7. #7
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    Re: Case sealant

    Quote Originally Posted by kcr357 View Post
    I like loctite 518
    NO! This is the most horrible crap there is. The ONLY case sealant you should be using is a thin silicone-based sealant. I use Threebond 1211. (Threebond also makes similar versions , like the recommended Yamabond 4, but this version dries quicker than the 1211)

    Rotax must have had some brain-dead engineers when they specified Loctite 518 back in the day. They finally wised up and went to a silicone sealant for cases in 2001. One of the best reasons to ONLY use silicone these days is because you never know the history of an engine you are working on. If it ever has used silicone, then Loctite 518 will NEVER set properly on those case halves again.

    A lot of "leaky inner seals" are misdiagnosed. What is happening is the 518 breaks down and the oil is leaking at the case halves.

  8. #8
    PWCToday.com Is My Home Away From Home TMali's Avatar
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    Re: Case sealant

    Yamaha bond 4

    and

    Blue loctit on all bolts thoughout the ski
    Last edited by TMali; 10-19-2017 at 11:50 PM.

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