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  1. #1

    loss of top end speed

    hey fellas.
    I've got a stock 2008 ultra 250 with about 14 hours. Up until this weekend it has always run between 68-71 mph according to the speedometer. It ran fine all day and on the way in the most it would do is is about 54 mph. There seems to be no loss of power down low and the engine seems to be running fine @ wot just the huge loss in top end speed. This problems really got me freaked out and. I would appreciate any ideas that you guys might have.

    Thanks


  2. #2
    First is try a new set of plugs, they have been known to kill top end.

    If that dont help then take it to the dealer for warranty. They should be able to run a diagnostic on it.



    And welcome to GreenHulk.net.

  3. #3

    Join Date
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    Have you taken a look at your impeller? Maybe you sucked up something that could have dinged the impeller. Or is obstructing water flow. Either one of those will cause you to lose top speed, while making the motor seem like it is running fine. Also i'm not to familiar with these ski's yet. Anything with fuel injection should throw a check engine light, and any real problems with the motor should show problems at all RPM and throttle positions. I would just look at the pump. Other than that I wish you luck. Hope this helps

  4. #4
    Fat Man, Little Boat Region8Ultra250X's Avatar
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    could be a loose coupler, or something maybe jammed in the speedo wheel, or like skip said it could be the plugs...

  5. #5
    www.eastcoastpwc.net Scott's Avatar
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    Whats your RPM's?? Lets start there before throwing parts at it.

  6. #6
    halfassjack's Avatar
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    Never trust the speedometer. Use a gps.

  7. #7
    rhorne1053's Avatar
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    Quote Originally Posted by jrbonniwell View Post
    hey fellas.
    I've got a stock 2008 ultra 250 with about 14 hours. Up until this weekend it has always run between 68-71 mph according to the speedometer. It ran fine all day and on the way in the most it would do is is about 54 mph. There seems to be no loss of power down low and the engine seems to be running fine @ wot just the huge loss in top end speed. This problems really got me freaked out and. I would appreciate any ideas that you guys might have.

    Thanks
    Does your speedometer show 71mph? This is the first time I have heard this. Just wondering if they made a change for the '08 models. thanks.

  8. #8

    Thumbs up

    the problem is your speedo , mine does the same thing get a gps.2008 green monster.with ****ty speedo.

  9. #9
    benjahw benjahw's Avatar
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    Quote Originally Posted by soberdave View Post
    the problem is your speedo , mine does the same thing get a gps.2008 green monster.with ****ty speedo.
    +1

    use your rpm guage. also if you hang your head out to the side and open your mouth your lips should flap a bit. flapping lip is good for about 65-68 mph. Full gum exposure is anything over 70.


  10. #10

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    Quote Originally Posted by BluUltra250x View Post
    Whats your RPM's?? Lets start there before throwing parts at it.
    That'll work.


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