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  1. #1

    Your Theories on 2001 Kawasaki 900 STX problem?

    - 2001 Kawasaki 900 STX -

    I recently took it out on the water and I was running for about 45 minutes then suddenly the jet ski lost power, then came back. This is doing it constantly. I cleaned the entire fuel system including the fuel pump, replaced fuel lines, fuel filter and rebuilt the carbs. I checked the fuel pump operation and it is fine. But still doing the same. I replaced the spark plugs and it did run for about 35 minutes and then did the samething. Does anybody have any idea on why it is doing this and what do I need to do.

    I am thinking that it may have something to do with the CDI box and electronics because everything else is practically new. Could it be the stator as well?

    This ski has a new SBT engine in it with about 2 hours on it total.


  2. #2
    axgrider73's Avatar
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    Have you done any plug chops or checked piston wash?

    Have you rechecked the compression? It could be trying to seize.

  3. #3
    Quote Originally Posted by axgrider73 View Post
    Have you done any plug chops or checked piston wash?

    Have you rechecked the compression? It could be trying to seize.
    Yeah, I checked the compression and all three are at 110psi.

    I have not done the plug check yet...I was reading more about this problem and seems very common among these STXs. One guy fixed the problem by replacing the CDI and another fixed it by trimming the plug wires, just as you suggested.

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