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  1. #1

    polaris 780 stl carb issue / bilge pump

    Fist time Ski owner and green hulk poster, so thanks in advance....

    Here's my issue. Bought a couple used 96 polaris slt 780s. 1 of them has no issues. The other one...well when you start it up (in the water) it seemed to have quite a bit of white smoke, which eventually went away.

    The ski will hesitate when trying to accelerate, seemingly bogging down. With a little coaxing, and after a few minutes that problem will go away, but going from 0 to even half throttle will cause hesitation.

    I'm not sure if this is related or not, but there was quite a bit of water in the compartment after riding, the fuse on the bilge pump is ok, I'm not sure if that's just a bilge pump issue or not.

    So when i got home I took the intake cover off and there was some chalky/milky white residue on top of the carbs, the intake cover etc.

    Is this oil/water mixture? Any ideas on what I can do, and what is the issue?


  2. #2
    To me it sounds like lean bog, but I will wait and see what the other guys say. What I have learned on the polaris models is that you should ALWAYS rebuild the carbs before running an old ski.

  3. #3
    Click avatar for tech links/info, donation request K447's Avatar
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    Welcome

    The links below should point you in the right direction

  4. #4
    I had changed the starter recently and apparently didn't get a good seal on the exhaust manifold. I put it back in the water to first test the bilge pump, and it works fine, but I noticed at idle speed, water was spraying out of the exhaust manifold.

    Time to replace it and check it again!

  5. #5
    Click avatar for tech links/info, donation request K447's Avatar
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    Why would you need to put it in the water to test the bilge pump?

  6. #6
    Well actually I was checking for other leaks, hoses, gaskets, etc, but wanted to make sure the bilge pump worked. There's no "on" switch.

  7. #7
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by chinman View Post
    ...wanted to make sure the bilge pump worked. There's no "on" switch.
    There is no switch, but you can put your hand on the pump and feel the humming vibration when the engine is running.

    Or you can tip the nose up slightly, and put a couple of inches of water in the hull, then start the engine and see the water get pumped out. Then shut the engine down, take out the drain plugs and let the rest drain out when you really tilt the trailer up high.

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