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Thread: STX 15 F

  1. #1

    STX 15 F

    Guy i am the following problems on my STX 15F.... any help in solving it?

    Problem 1

    After a week since the last time it was used....it took about 10 seconds to start.

    Problem 2

    After about 2 hours from the last run...it took far longer to start...about 30 seconds of pressing the start button and the starter running without the engine even trying to ignite (definietly no spark)

    It then started and seemed to be working perfectly

    Problem 3

    After running perfect fine for about 15 minutes...both in idle and under throttle, after a bit of a high speed jump...it experienced a short lapse of apparent loss of power...which seemed like a fuel starvation of some sort.

    I then kept it under low revs...just enough for it not to go on idle, as i was afraid that it was going to stop completely.


  2. #2
    My name is Sean and I am addicted to STXs smokeysevin's Avatar
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    Re: STX 15 F

    One and 2 are normal. One hit the starter button just enough to blip it, this trips the fuel pump and pressurizes the line let it go until you hear it stop. The hit the starter button.

    Two, replace the oil temp and water temp sensor.

    Three, check the fuel pressure and idle control valve on the top of the throttle body. When you turn on the ski do you hear a motor and clicking sound?

    Sean

  3. #3
    TexasZ's Avatar
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    Quote Originally Posted by smokeysevin View Post
    One and 2 are normal. One hit the starter button just enough to blip it, this trips the fuel pump and pressurizes the line, let it go until you hear it stop. Then hit the starter button.
    Whew, good one Sean!!!

    Also, put some new spark plugs in and make sure they are gaped correctly. Also make sure the spark plug wire caps are down all the way on the spark plug...you will feel and hear that click.

    It doesn't make sense a lot of times but a new set of plugs often times solves the running problems, even the ones that seem unrelated.
    Last edited by TexasZ; 09-11-2012 at 10:49 AM.

  4. #4
    My name is Sean and I am addicted to STXs smokeysevin's Avatar
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    Re: STX 15 F

    When you change the plugs make sure you use anti seize and use a tq wrench. It matters I'm not just being anal.

    Sean

  5. #5
    Quote Originally Posted by smokeysevin View Post
    One and 2 are normal. One hit the starter button just enough to blip it, this trips the fuel pump and pressurizes the line let it go until you hear it stop. The hit the starter button.

    Two, replace the oil temp and water temp sensor.

    Three, check the fuel pressure and idle control valve on the top of the throttle body. When you turn on the ski do you hear a motor and clicking sound?

    Sean
    Yes i hear the clicking sound!!! what is that?

  6. #6
    My name is Sean and I am addicted to STXs smokeysevin's Avatar
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    Re: STX 15 F

    That's a good thing it means your idle control valve works. OK check for holes in the blue coupler at the end of the header.

    Sean

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    slothman's Avatar
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    Quote Originally Posted by smokeysevin View Post
    When you change the plugs make sure you use anti seize and use a tq wrench. It matters I'm not just being anal.

    Sean
    Why the anti seize? Are the heads known to strip easily ?

  8. #8
    TexasZ's Avatar
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    Why the anti seize? Are the heads known to strip easily ?
    I personally don't know the risk factor for these particular heads, but it seems that Kawasaki motors in general have gained a rather notorious reputation for spark plugs seizing in them.

    To what extent do they seize and which particular motors are the worst about it, I don't know cuz' I use the anti-seize every time without fail. And I also use a torque wrench every time. It's just too darn easy not to do it that way. Why take the risk...

  9. #9
    My name is Sean and I am addicted to STXs smokeysevin's Avatar
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    Re: STX 15 F

    Strip no but the plugs break off in the heads if you don't take care in instillation and removal.

    Sean

  10. #10
    slothman's Avatar
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    Quote Originally Posted by smokeysevin View Post
    Strip no but the plugs break off in the heads if you don't take care in instillation and removal.

    Sean
    noted, thank you. I am about to do this on my stx15. I am going to change the oil as well.

    Any info on how to check my hoses, I hear this things sink often ! Anything else to look out for ?

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