js550 Crank seal / case issue
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  1. #1
    PWCToday Newbie
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    js550 Crank seal / case issue

    Hey guys, just finished the second attempt of rebuilding my JS550. Performer a leakdown test and it failed miserably. Itís leaking between where both crankcase halves meet the crank seal. It looks to be a crankcase issue and they are all new seals. How do I fix the issue aside from replacing the crankcase completely?B2B55A6A-8F27-4EE7-96B4-9FA1A89D0A38.jpeg

  2. #2
    PWCToday Newbie
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    Re: js550 Crank seal / case issue

    You need more sealant there. You can apply it a little thicker l
    Make sure the sealant completely covers the mating surface too.

    Sent from my LG-H810 using Tapatalk
    Last edited by Do Dah; 07-10-2019 at 10:18 PM.

  3. #3
    Attention ***** PWCToday.com Is My Home Away From Home JonnyX2's Avatar
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    Re: js550 Crank seal / case issue

    A little more sealant, let it cure completely.
    Quote Originally Posted by Firebird A/C&Heating View Post
    OMG.....Rules for 550 vintage ski class...550 ski riders do not conform to any kind of rules. That is why you are riding a 550 ski in the first place. Rules suck....
    PS...the rule book will be in my 550 pump
    Quote Originally Posted by WB1994
    Listen , stop your cryin' , its only an X2.

  4. #4
    PWCToday Newbie
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    Re: js550 Crank seal / case issue

    I’ve pulled apart the bottom end and re-cleaned and sealed everything with more sealant as suggested. It’s all torqued down and has been curing for a few hours now. Going to leave it for 24 hours and leakdown test it again tomorrow. Appreciate the feedback ��

  5. #5
    PWCToday.com Is My Home Away From Home bandit88's Avatar
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    Re: js550 Crank seal / case issue

    Are the crank cases a matched set? It looks like the top and bottom half came from two different motors with that offset
    -95 750SXI
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