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  1. #1
    john07ex's Avatar
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    Help me diagnose this..

    My 07 250x has 109 hours on it.
    Its All stock.

    Runs great all day but if i run it <wide open throttle> WOT within 20-30 seconds it drops 2k rpms and bogs down till i left off the gas. If i go WOT again its fine..till about 20-30seconds again..

    basically it wont run wot for more than 30 secs....
    it will run 30-50mph all day with no problems..only under wot.
    any ideas?

    This is a new issue that just started an hour ago.
    Only things i have ever dont to the ski is I changed the plugs at 30hrs. I change the oil every 30hrs and it doesnt seem to be overfull of oil.

    I hate taking it to the dealer so if its something i can fix myself i would like to try...and yes i spelled problem wrong..LOL
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  2. #2
    Formerly Ultra250 TN Aquaholic6801's Avatar
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    Id check the supercharger tension belt first.Then if that doesnt fix it Id change the plugs again.

  3. #3
    john07ex's Avatar
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    How much tension should it have?
    I see the adjuster but ive never touched it. Do i need to removed the IC to get the belt cover off?

  4. #4
    sportman's Avatar
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    what was your top speed again?
    you said 30-50 mph? never have this type of problem just i was wondering that how you can run it full day and never push it harder that 50 mph
    did you check your BOV or any hoses maybe one was loosed
    just a thought
    Last edited by sportman; 04-14-2008 at 10:52 PM.

  5. #5
    GODOSIDIS's Avatar
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    Quote Originally Posted by john07ex View Post
    How much tension should it have?
    I see the adjuster but ive never touched it. Do i need to removed the IC to get the belt cover off?
    Belt cover is just 1 bolt.
    Belt tension i use the kawi tool.
    From experience it shouldnt be able to turn 90degrees by hand.
    I guess (and hope) its either the belt or the plugs.
    Do a litle research using the search option you will find tons of info.

    Get a manual and a belt tool asap.
    Less than $100 the two of them.

  6. #6
    Formerly Ultra250 TN Aquaholic6801's Avatar
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    Quote Originally Posted by john07ex View Post
    How much tension should it have?
    I see the adjuster but ive never touched it. Do i need to removed the IC to get the belt cover off?
    No you dont have to, just take the black cover off, maybe go to your local dealer and borrow their tension tool, or if you can flip the belt over more than 90 degrees it needs to be tightened.

  7. #7
    john07ex's Avatar
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    Yea we were wave jumping so it wasnt much space to run 65mph..so most of the day we were cruising 30-40mph.. but when i did want to go it would die with 20-30seconds..

    my gps top end is usually 64.5.
    Myabe ill take it to the dealer for warranty check out this time since i dont have the tool yet and i need it fixed by this weekend.

    Ive tried to remove the belt cover but i couldnt get it free of the engine bay cause the IC was in the way..

  8. #8
    benjahw benjahw's Avatar
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    I Am 90 percent SURE I know your problem.... exact same symptoms. same hours too when it happened...

    brought the ski to the dealer and tech found something loose on the intake. anyways with WOT the loose part (havent taken intake out so not sure just what) on intake will suck onto something causing it to be blocked off. ill bet as soon as you let off throttle(intake lets go of attachment) it will let you run WOT again. look at your intake. dealer fixed mine in a cuople minutes. i prob could have too but i live right next to dealer.

    pretty sure not the belt... ive had many belt symptoms and this doesnt sound very close

  9. #9

    high temp problems

    check your hoses. have a dealer diag; every electronic problemis kept in memory

  10. #10
    john07ex's Avatar
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    UPDATE********

    Took it to the dealer after setting up my recall parts first last week.

    They did 4 recalls.
    throttle thingie
    water intrusion intake plate
    plugs
    fuel line clamp...

    Well they tried to charge me $90 for diagnosing my problem.
    They said they couldnt find anything wrong with the ski but the plugs and those were recalled <warranty>.
    I argued if the plugs were the problem why would i have to pay to have them replaced.. am i wrong?

    Anyways he wanted to charge me 2 more hours <@ $90/hr> to lake test it to troubleshoot more if it wasnt fixed still..
    I lake tested it and it seems fine now.. well see this weekend.

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