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  1. #1

    ultra 250 NEED HELP

    I need some help diagnosing a ultra i just picked up ......... i tried the self diag n there are no codes. here is what its doing.....coming out of the hole is seems normal then falls on it face like it has bad gas, wont go past 5000-5200 most boost i get is 5 psi...... i took a gas sample rfrom the fuel rail and its nice and clean. where should i start poking with this ??

  2. #2
    Banned User
    Join Date
    Jan 2009
    Spark plugs should be changed first.

    Then check the sc Belt tension. And go from there.

  3. #3
    ill scope that out.... pretty hard to get a feel for if its right on the trailer no ????

  4. #4
    UltraKvz's Avatar
    Join Date
    Feb 2011
    Also check if the airhorn sucking against the hull

  5. #5
    KawiMike's Avatar
    Join Date
    Mar 2012
    Pierre Part, La
    And check all hoses to and from the intercooler. You may have a boost leak somewhere.

  6. #6
    that could be a possibility..... the air biox under the handle bars and the boot from them to the charger seems to collapse when the throttle is snapped........ where would they be sucking to the hull???? where do they end up going???

  7. #7
    Formerly Ultra250 TN Aquaholic6801's Avatar
    Join Date
    Feb 2007
    Old Hickory,Tn
    If i remember right its in front of the ski to the left of the gas tank sitting on the ski....Its a round air horn off the air box, I only had the stock intake for like 5 hours, but I think thats where it is...

  8. #8
    nicjak's Avatar
    Join Date
    Mar 2008
    Warragul, Downunder
    Rhs above tank

  9. #9
    devils ride 250's Avatar
    Join Date
    Mar 2010
    lehigh valley pa
    I had a cooling line hose leak u see a water spraying around in there is a good sign of a leak. Take the seat off and hook water up to it or drive around with seat off and give it quick throttle bursts see if water sprays out from any hoses

  10. #10
    I found it up under there...Box was loose and i can see where it was sucking itself to the side of the boat. there's a rubber grommet on air box that looks like i can eliminate to buy myself another inch or 2 of clearance, would that be OK to do ??? That box is jammed in there so darn tight i cant even begin to see where or how its mounted........or do they just lay in there??? This ski before i bought it was COMPLETELY disassembled so it dosent surprise me if things aren't mounted they way they should be or not mounted even at all.....

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