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Thread: 15F Rough Idle

  1. #1

    15F Rough Idle

    Greetings...



    Pair of stock '07 15Fs, 27 hours, first time out this season...



    One of the skis idled rough, occasionally dropped RPM at idle. Runs great when throttle is applied, no loss of power or speed at WOT, runs smooth. It doesn't hesitate at all when I apply the throttle. I didn't notice this when running it on the hose, but definately noticed it on the water.



    The gas IS from last season but I kinda ruled that out since the other 15F also had gas from last season but ran fine. The skis still have the original plugs but they still look decent.



    The only thing that happened is I over-filled the gas tank when I took it out. Since I over-filled it, I left the filled cap open to let it vent out. As I was filling up the other ski, I noticed the ski that I over-filled started spewing gas out of the open gas cap; even though I already stopped filling it...



    Would this have caused any damage?


  2. #2
    nicjak's Avatar
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    nope it was just purging air out of the tank.

  3. #3
    I'd try new plugs first as appearances are deceiving with plug condition.

    rt

  4. #4

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    Quote Originally Posted by rotortiller View Post
    I'd try new plugs first as appearances are deceiving with plug condition.

    rt
    +1
    Plugs are first in this type of incident. If they don't work, then no money has been wasted, just hang onto them until they are needed. Also gives you the opportunity to use some good anti-seize on the plug threads.....which is highly recommended

  5. #5
    Moderator #985 lasportsmn's Avatar
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    Quote Originally Posted by Shuswap View Post
    +1
    Plugs are first in this type of incident. If they don't work, then no money has been wasted, just hang onto them until they are needed. Also gives you the opportunity to use some good anti-seize on the plug threads.....which is highly recommended
    That is what I do to my LX whenever it happens and believe it or not, when this happens my ski would tend to die if I let off the throttle from a high speed and the KSS would not work sometimes. Even after changing the plugs the idle may be better but not right. For whatever reason I just disconnected my battery to do some work on the ski and when I reconnected it everything started working fine. I never got a code but something definately reset with the ECU. Just a second option if justthe plugs don't resolve your issue. but definately as Shu stated and I speak from personal experience it doesn't matter fresh or salt as I ride 75% fresh and am anal about cleaning my ski keep neversieze on the plugs.

  6. #6

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    Put a set of plugs in it, mine did the same thing.

  7. #7
    CJ River Rider's Avatar
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    Quote Originally Posted by Shuswap View Post
    +1
    Plugs are first in this type of incident. If they don't work, then no money has been wasted, just hang onto them until they are needed. Also gives you the opportunity to use some good anti-seize on the plug threads.....which is highly recommended
    +1, plus if it's last years gas, throw in a can of SeaFoam

  8. #8
    My name is Sean and I am addicted to STXs smokeysevin's Avatar
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    Quote Originally Posted by t.zelazny View Post
    +1, plus if it's last years gas, throw in a can of SeaFoam
    drain the old gas before you go buy anything, Then check the plugs, then listen to see if the IDLE AIR CONTROLLER (little thing on top of the throttle body that makes the clicking sound when you turn the ski off) makes the little clicking sound. \

    and use anti sieze on the new plugs!!!!!!!!!!!!!!

    Sean

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