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  1. #1
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    JS 550 Crank seal question

    85' Js 550, getting ready to put case half back together. And Yes I have the shop manual so I know what it says, looking for your opinions here. Have three of the double spring seals and 1211 to stick the two case halves together.

    Three questions:

    #1) I've got the shiny metal face of the crank seal pointing towards the pistons on the flywheel side.

    #2) I've got the shiny metal sides facing each other on the coupler side (Rubber sides facing out on both sides).

    #3) How much 1211 do you guys lay down between case halves? Just a nice thin layer on both sides then stick together? Just a thin layer on one side then stick together? Anyone know of a thread with pictures here I can reference?

    Thanks.
    JS 550 85'
    JS 550 87'
    SX 300 91'
    X2 89'
    SL 650 Triple 92'

  2. #2
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    Re: JS 550 Crank seal question

    Is anyone still alive on these forums? Don't seeing much action lately...
    JS 550 85'
    JS 550 87'
    SX 300 91'
    X2 89'
    SL 650 Triple 92'

  3. #3
    PWCToday Regular
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    Re: JS 550 Crank seal question

    lots of the activity is moving here https://www.facebook.com/groups/621332731291152/

  4. #4
    I dream skis sportsfreak29's Avatar
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    Re: JS 550 Crank seal question

    Sounds like youre ok on the seals. I set the top half of the case, bolts down on a bench, set the crank in with new seals, and then add a thin layer of sealant to the mating surfaces of the bottom case half.

    Put the bottom half on and install the bolts to the correct torque.

    Go easy with the sealant, so you don't have a bunch of excess inside the case.

    One smooth, thin coat.
    Last edited by sportsfreak29; 12-07-2017 at 12:07 AM.
    If you're not crashing, then you're not trying!!!

    '84 js550/650 Hull, Tubbies, Footholds, 650sx Motor & Pump, 1.75 over 663cc's, OP Comp Head 190psi, 44SBN, Vortex FA, WC Intake, Boyesen Reeds w/ Stuffers, Factory B Pipe, Factory Waterbox, 650 Side Exhaust, Dual Cooling, Billet Couplers, Jet Works FCV, OP 650sx Ride Plate, PJS Top Loader, Skat 9-17, -2" AM Pole, MSD total loss. 54mph.

    Special thanks to Chris Newmiller, and Mitchell at M&M Marine!

  5. #5
    PWCToday.com Is My Home Away From Home Chester's Avatar
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    Re: JS 550 Crank seal question

    Only put a thin layer of TB 1211 on one side.

    Chester
    Speed is very expensive. How fast do you want to spend?

    Stand up:
    98 SXi-Pro

    Couches:

    96 XP
    86 X2

  6. #6
    I dream skis
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    Re: JS 550 Crank seal question

    If your smart you will use (3 ) Kawasaki 92049-3006 seals on the crank.

  7. #7
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    Re: JS 550 Crank seal question

    Thanks for the input guys!

    Quote Originally Posted by ericstratton View Post
    If your smart you will use (3 ) Kawasaki 92049-3006 seals on the crank.
    Yup, got em. That is what I meant by the double spring seals.
    JS 550 85'
    JS 550 87'
    SX 300 91'
    X2 89'
    SL 650 Triple 92'

  8. #8
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    Re: JS 550 Crank seal question

    So how long do you guys wait before running a pressure test?

    Want to make sure its dry before running pressure test.


    Sent from my iPhone using Tapatalk
    JS 550 85'
    JS 550 87'
    SX 300 91'
    X2 89'
    SL 650 Triple 92'

  9. #9
    Top Dog bandit88's Avatar
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    Re: JS 550 Crank seal question

    24 hours with threebond, should say on your tube of sealant
    Last edited by bandit88; 12-12-2017 at 12:05 PM.
    -95 750SXI
    -86 440 with PJS800 conversion
    -90 TS650

  10. #10
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    Re: JS 550 Crank seal question

    Quote Originally Posted by bandit88 View Post
    24 hours with threebond, should say on your tube of sealant
    You mean I'm supposed to read the directions?

    Thanks! Checked after 12 hours and it had set up but still a bit soft.
    JS 550 85'
    JS 550 87'
    SX 300 91'
    X2 89'
    SL 650 Triple 92'

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