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Thread: rpm issues??

  1. #1

    rpm issues??

    Ok guys. i've looked and didn't see anything on the subject so im asking here. my 900 zxi moves and rpms increase to about 4k. after that the rpms increase and the machine will not go any faster. kind of feels like im driving a stick and the clutch and gas is in. any thoughts? Help please!! just finally got in running right and its early in the year!!!


  2. #2
    steve45's Avatar
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    Too much clearance between the impeller & housing, bent or damaged impeller and/or stator blades, loose or missing sealant around the jet pump & pump shoe.

  3. #3
    Ok can u speak kindergarten. How do I check theses things??

  4. #4
    steve45's Avatar
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    Shine a flashlight up through the intake grate on the bottom of the 'Ski and look at the impeller (looks like a fan or propeller). It will have 3 blades on it. If any of the blades are bent or have big dings on them, you may need a new impeller.

    Look for silicone sealer around the pump, both on the bottom and at the back of the 'Ski. If you see gaps where chunks are missing, that can cause problems.

    To measure the clearance, you need a thing called a 'feeler gauge', available from an auto parts store. Use it to measure the gap between the impeller and it's housing. Should be .025" or less. You may need to get a shop to measure this for you.

  5. #5
    Thanks so much.

  6. #6
    steve45's Avatar
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    You're welcome, hope it makes sense and you're able to solve the problem.

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