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  1. #1

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    Kawasaki STX-12F Exhaust

    This exhaust was pulled from a 2007 STX-12F. At the end of the pipe, there are holes at the top and bottom. Both holes are centered on the pipe and the top hole is round, which leads me to believe that this is not rot-thru.

    Never dealt with a 12F before, only Ultra LX/15F motors and never saw anything like this on other motors.

    Are these holes normal? The motor ran fine with no leaks from the exhaust.
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  2. #2
    Pain is fear leaving your body.... rlovebk's Avatar
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    Not normal though the issue, (due to poor maintenance) is not.
    Unfortunately they are not cheap to replace.

  3. #3

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    That was my initial thought, especially since this ski was not well-maintained. But the symmetrical placement of the top and bottom holes, as well as the top hole being a near-perfect circle, make me question that.

    The 2003-2004 12F shows a different part number (18088-3717) than other models (18088-3723). And there's one on ebay with the exact same holes. This makes me wonder if the earlier models were possibly designed this way.

    I parted out the ski and don't plan to use this part, but thought the topic was worth a discussion. Someone that is repairing a ski might needlessly panic when they see the holes. Again, this ski ran well with no exhaust leaks.

  4. #4
    it isnt supposed to be there. it dumps cooling water into the bilge and causes poor/no cooling in the stinger section. Most that have holes have way more corrosion on the "ring" section.

  5. #5

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    This exhaust wasn't dumping water. The rubber coupling covered the holes.

    Here are pics from the one on ebay... holes in the same places. Bottom hole is a near-perfect circle.
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  6. #6
    The ones i have seen the rubber coupler is usually burnt up from other issues so I didnt really think about it covering it LOL. How is the inside of it? It could be fixable to be honest.

  7. #7

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    I don't plan on using it. Started the thread because the holes seem too well-placed on both pipes pictured above to be random corrosion. Of course, anything is possible.

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