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Thread: am i screwed?

  1. #1

    am i screwed?

    96 slt780. Bought 3 weeks ago and ran great until it got wet. shop just said im only getting 35psi in one cylinder. it still starts fine and runs, just slow as hell. every now and then it will catch and still do 50 or so mph but not often. is there any way this is something simple-ish or am i looking at a whole engine teardown? Im pretty good with my hands but I don't think i can handle something like that. Shop wants me to buy a new engine for a grand, but since that is what i paid for the whole setup i doubt we will be doing that. Kids are freaking heartbroken, hoping for some good news. Thanks in advance.


  2. #2
    Hydrotoys's Avatar
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    Simple!

    Do YOUR OWN compression check, and get back to the board with the numbers. I think You'll find a wealth of helpful folks after that.

    Otherwise, hand your wallet to the mechanic and don't worry about it. He'll "take care" of You.

    YOU CAN HANDLE IT... start with the correct spark plug wrench and a compression tester. Get the numbers here on the board.

  3. #3
    Moderator beerdart's Avatar
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    Welcome to the Hulk..

  4. #4
    are there marine compression gauges or will any do?

  5. #5
    Hydrotoys's Avatar
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    You just need the correct plug type, like any car. Take a plug to the auto parts store, and show the folks there.

    -Take off the 3 wires, and ground them, if possible.
    -Take out ONE spark plug at a time.
    -Screw in the compression tester.
    -Open the throttle all the way.
    -Hit the start button, and hold it until the needle stops going up.
    -Record your numbers and post it up.
    Mag- Considered the front of your engine.
    Cen- Center cylinder.
    Pto- Driveshaft end.

    Inspect your plugs while you have them out. They are very, very, very susceptible to fouling on a two stroke, compared to your car. Your heads are aluminum. Don't gorilla tightened them.

    Lastly, and most importantly, you need to get a Polaris manual for your ski. It is very helpful. Maybe someone on here will chime in on where to download one.

  6. #6
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Any automotive style will work. You can prob rent one from an auto parts store for cheap.

    Pull all the spark plugs out, install the gauge, hold the throttle wide open, and repaet for other cyls.

    Tell us what you get.....



    And what do you mean ski got wet?????

  7. #7
    Quote Originally Posted by xlint89 View Post
    Any automotive style will work. You can prob rent one from an auto parts store for cheap.

    Pull all the spark plugs out, install the gauge, hold the throttle wide open, and repaet for other cyls.

    Tell us what you get.....



    And what do you mean ski got wet?????
    Yeah about that.........thing fills up quick when the drain plug is removed. I caught it before it covered the engine, but the electrical box and battery were submerged.

  8. #8
    Hydrotoys's Avatar
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    yeah, you are probably screwed then....

  9. #9
    Quote Originally Posted by Hydrotoys View Post
    yeah, you are probably screwed then....
    still starts right up and did run fine for an hour though. I checked for hydrolock as per forums and no water in cylinder, spark plugs were dry.

  10. #10
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Perform a crank index test.

    Then check your elec box for signs of water or corrosion.

    Then check the stator cover (magneto) for signs of water.

    Might want to check the carbs and water/fuel seperator for water intrusion.

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