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  1. #1
    mr. happyfunbear tenjuna's Avatar
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    Oil leak, cannot find it 1993 sl650

    I came home to find a huge puddle of oil under my ski, and when I opened it up sure enough oil all over the bottom of the hull.

    now, the tank is empty, and I am at a loss as to where it is coming from.

    is it possible for the pump to leak somehow? or maybe eek out of the engine?

    the lines all look dry, there is no hole in the tank...it's a mystery


  2. #2
    johnsonmtz's Avatar
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    Quote Originally Posted by tenjuna View Post
    .... oil all over the bottom of the hull.

    now, the tank is empty, and I am at a loss as to where it is coming from.

    is it possible for the pump to leak somehow?
    This will be tricky but an angled mirror will help you to see. There is a bleed screw on the end of the pump that is meant to be opened to allow oil to flow from the tank to the pump. My guess is that screw is loose allowing oil to freely flow out of the pump.

    The screw is item #7 in the diagram:

  3. #3
    Click avatar for tech links/info, donation request K447's Avatar
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    Bummer. I know how messy that can be to clean up.

    Is there a pool of oil inside the engine?

    Crank it with the spark plugs out. Put a cloth over the plug holes just in case.

    I have had oil seepage in the past from hose nipples that were rough (or cut with the knife when the old hose was being sliced away), and even with a tight clamp the hose was not fully sealing to the nipple and oil would work its way out.

    A technique I used to find the leak was to cut thin strips of white cotton cloth. I tied strips around each nipple and fitting. The leak stained the cloth and I could see which places were seeping oil.

  4. #4
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    I don't have any help for you on the oil, but rather a question.

    Why is there oil under your ski???

    If oil was able to leak OUT, then water is able to seep IN from the same location.

    You need to find the location of the hull breech too.

  5. #5
    johnsonmtz's Avatar
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    Quote Originally Posted by xlint89 View Post
    If oil was able to leak OUT, then water is able to seep IN from the same location.

    You need to find the location of the hull breech too.
    Ooooh, good catch Kev. I was so concentrated on the source of the oil that I didn't think about why it got out of the ski.

    KJ

  6. #6
    mr. happyfunbear tenjuna's Avatar
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    the oil was coming out through the hull drain in the back.

    I have a hunch that johnsonmtz may have nailed it with the bleeder screw...I had to use a large amount of effort to get the damn thing to break and unscrew so that I could do the oil line priming we had discussed in my rebuild thread. it is possible I did not tighten it back up. should be a really hootin time trying to get that resolved.

    lol so any tricks on getting out a large amount of oil pooled in the bottom of the hull?

  7. #7

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    I am guessing that the oil came out of the bilge plug on the back of the craft. I think if the oil tank and lines are empty it would be worth maybe adding a little more oil to see where it leaks. Leave the oil cap loose so it helps it travel faster to the leak. also since you have to do this, it would be a great opportunity to change the in line oil filter. be sure once this problem is resolved you bleed the oil system properly. I know the Polaris manual says to run premix after any oil injection service, but maybe other people know something different or can confirm.

  8. #8
    mr. happyfunbear tenjuna's Avatar
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    thanks for the reply...I just finished rebuilding the engine and it's likely something I overlooked.

  9. #9
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by tenjuna View Post
    ... any tricks on getting out a large amount of oil pooled in the bottom of the hull?
    Suction pump drawing through a container, large number of old T-shirts cut into pieces, whatever works.

    Perhaps tipping up the trailer tongue and catching what comes out the drain holes.

    I have had similar messes to clean up in my own hulls

    Once I had the vast majority of the oil sopped up, I hunted down and fixed the oil leak. Then the hull got yet another Simple Green interior cleaning and rinse.

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