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  1. #1
    retro jet's Avatar
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    Sludge in Oil Tank with Sea-Doo Synthetic

    Anybody else see this type of sludge in the bottom of their oil tanks and in the filter. The picture of the tank opening is sludge that remained after oil was poured out. Sludge had also settled in the lowest part of the filter. I think this is Sea-Doo Synthetic oil, it kinda smells like sun screen. The last time the GTX's were registered was 05 or 06. So this oil has sat for at least 4-5 years at about half full so and I would sure expect there was condensation. Who knows what the previous owner used over the years, maybe they mixed oil.

    The sludge is tough to get out and clings to the tank. I filled the tank with Mineral Spirits and let it soak for a while. Most sludge disolved, but there is still some stubborn spots left.

    What do you think? crappy oil, years of condensation and no use, or different types of oil were mixed?
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    Last edited by retro jet; 06-15-2010 at 08:48 AM. Reason: clarity


  2. #2
    flyin' the friendly skies airbornexp's Avatar
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    Ive always wondered if that came apart

  3. #3
    been around the block Stagesrt4's Avatar
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    Quote Originally Posted by airbornexp View Post
    Ive always wondered if that came apart
    <<this guy is taking it apart when he gets home to see what hidding in there...ha

  4. #4
    retro jet's Avatar
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    They come apart pretty easy when you saw thru the housing. The filter seemed to have done its job, no sludge was on the inside of the screen until I pushed the filter back together.

  5. #5
    I've noticedit in the bottles as you pour it in, and it settles on the bottom too.

  6. #6
    This is how I run a jetski shop in the desert nmpeter's Avatar
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    I'd replace the tank

    I've repalced maybe a dozen doo oil tanks tanks in the last two seasosn.

    This makes sense for a few reasons....

    The tanks have a problem with the welded seam..all the ones I've replaced have leaked from this electrically welded seam

    When the seam lets go it creates a huge mess in your hull

    the huge mess is made by oil that sells for close to $60 a gallon to your door

    the tank and rubber bits are under $140

    cheap insurnace if you ask me.

  7. #7
    90's Seadoo GURU Minnetonka4me's Avatar
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    Quote Originally Posted by retro jet View Post

    What do you think? crappy oil, years of condensation and no use, or different types of oil were mixed?
    D...all of the above.

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