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  1. #1

    HELP with 15-F wont go over 5500 RPM / Half speed

    Im hoping someone here may be able to point me in the right direction.

    I have an 06 Kawasaki 15-F that will not go past about 5500 RPM, and the speed is down to about half speed. It idles nice and runs nice up to half throttle, then it just has nothing more to give. I can hold the throttle at half, then increase it to full throttle with little to no difference in RPM / speed, yet it doesnt feel as though it is breaking down.

    I have put in new spark plugs, check the fuel pressure (47psi), checked spark, checked compression, cleaned air box, checked jet unit. I have ridden it with the seat off with no difference either.

    There is nothing that i can see that is causing the issue. It is not in SLO mode.

    Any ideas would be great.


  2. #2
    Banned User
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    HELP with 15-F wont go over 5500 RPM / Half speed

    Pull the pump check bearings

  3. #3
    It's not stuck in baby mode instead of FPO?

  4. #4
    nicjak's Avatar
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    how is the exhaust coupler?


  5. #5
    CJ River Rider's Avatar
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    Quote Originally Posted by nicjak View Post
    how is the exhaust coupler?
    +1, I had the same problem and it turned out to be exactly this.

    http://www.greenhulk.net/forums/show...=1#post2055208

  6. #6
    The pump bearings are smooth when you spin the prop.
    It is not in SLO mode, it is in FPO
    I could not see any leak from any of the exhaust coupling, but just in case, i rode the ski with the seat off to eliminate the potential exhaust leak fouling the engine breathing.

    Any other ideas?

  7. #7
    My name is Sean and I am addicted to STXs smokeysevin's Avatar
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    Re: HELP with 15-F wont go over 5500 RPM / Half speed

    Check my thread in the tech tips section.

    Sean

  8. #8
    Quote Originally Posted by smokeysevin View Post
    Check my thread in the tech tips section.

    Sean
    Thankyou, i have read this post that you are talking about and it is very helpful. I have do all the checks that you list there with no outcome. I am going to replace the spark plugs again, even though they are new just to see what happens. If that does not work, i have no idea what to do as i have done all the checks i know of.

  9. #9
    My name is Sean and I am addicted to STXs smokeysevin's Avatar
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    Re: HELP with 15-F wont go over 5500 RPM / Half speed

    What was the fuel pressure?

    Sean

  10. #10
    Quote Originally Posted by smokeysevin View Post
    What was the fuel pressure?

    Sean
    47psi constant

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