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  1. #1
    flyboy's Avatar
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    found the Gremlin!!

    well, I think I have anyway. .

    about 5 hours After my 1390 build, I got water in my motor and the crank went bang! Sent the crank off to get rebuilt and got the ski all back together and running again.

    The ski has been running OK for the summer but not like it should. So Chip From the next town over let me borrow his compression test kit.

    I pumped it up to about 10 lbs and within 5 minutes the preasure would be down to about 2... I put soap ALL over the motor and found not a single leak, untill....

    I put soap on the rear seal, low and behold, My garage was filled with bubbles!!!

    I put brand new seals in the ski with I built the 1390 but thought I could be able to reuse them since they only had about 5 hours on them. I think they night have gotten heated and warped. It's leaking around the inner part of the seal.

    the ski has been comming out of the hole like a dog and only running about 73.

    I hope this is the problem, only Time will tell..

    Anyone have some new seals laying around that they can spare?

    James


  2. #2
    Hydrotherapy's Avatar
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    glad you found it

    looking forward to some new numbers

  3. #3
    JKR1300's Avatar
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    Why take a chance - always use new seals & gaskets

  4. #4
    Moderator OsideBill's Avatar
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    Did you lube the seals when you installed them? I agree with JKR1300 too never take a chance on a used seal.

  5. #5
    flyboy's Avatar
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    i didn't lube the seals. what should i use?

    do i just lube the rim or the whole thing?

  6. #6
    improvised tmg97gp's Avatar
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    lube the inside edge of the seal that runs on the crankshaft.

  7. #7
    Moderator OsideBill's Avatar
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    Quote Originally Posted by tmg97gp View Post
    lube the inside edge of the seal that runs on the crankshaft.
    Exactly, I use synthetic marine grease for this.

  8. #8
    flyboy's Avatar
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    ok, so just a Rim job, got it!

  9. #9
    Moderator OsideBill's Avatar
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    Quote Originally Posted by flyboy View Post
    ok, so just a Rim job, got it!
    Be sure and grease the shaft too

  10. #10
    flyboy's Avatar
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    ok, grease the shaft, lube the rim... Got IT!!

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