Results 1 to 7 of 7
  1. #1

    07 250 dying when letting off to idle

    My 07 250 is stalling when letting off the throttle, starts right back up and surges from 700 - 1,400 rpm and settles down, hit the gas and let off and it will die again. New plugs less than 2 hrs ago. Also noticed the auto rev feature when letting off the throttle and turning the bars is't working, not that I care about that feature, just wondering if the 2 are related. Any help would be appreciated. thanks chris.

  2. #2
    nicjak's Avatar
    Join Date
    Mar 2008
    Warragul, Downunder
    it only works above 3000rpm, air intake blockage maybe?

  3. #3
    Yeah, I know the auto rev only work at certain rpm ranges, my
    03 150 had it also, but either way its not working, wondering if it not working and dying when letting off at speed are related. Checked all the clamps and hoses for air leak didn't spot anything. Other than stalling ski runs fine, pulling 10, 11 lbs of boost and 7800 rpms.

  4. #4
    Take the time to smile sirbreaksalot's Avatar
    Join Date
    Jun 2007
    Rockwall , Texas
    push the key in and then remove the key ,
    You should hear a series of rattles/ clicks coming from the throttle body.
    This is the ISC motor resetting its self ( I called it a IAC , which is a car term my bad )
    If you DONT hear those rattle noises replace the Idle Speed Control motor on the throttle body

    it also is what lifts the rpm for the Steering control
    they normally fail when water pass's threw them or can just be old age

    Last edited by sirbreaksalot; 06-29-2011 at 06:41 PM.

  5. #5
    Thanks Waz, I think your exactly right. I had just plowed through a wave before it started happening, and I don't remember hearing all the little rattles and clicks that the ski normally goes through either. Will check it out. Thanks again.b

  6. #6
    If problem still exists, check/replace ISC (idle speed control) unit - it's a stepper motor that controls the amount of air going into the intake when throttle is completely closed.

  7. #7

    Join Date
    Apr 2005
    FL Keys
    Had the same issue with my 07. Changed out the ISC and no more stalling. Was doing it when i bought the ski so I didn't know the ISC made noise. I thank this forum for the info on fixing it.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Ultra 250 Idle RPM's??
    By ard250x in forum Kawasaki PWC Performance (4-stroke)
    Replies: 2
    Last Post: 05-21-2010, 10:14 PM
  2. FS Lots of parts letting go cheap
    By JIM'S PERFORMANCE in forum Yamaha Classifieds
    Replies: 5
    Last Post: 05-18-2010, 05:15 PM
  3. letting an X4 sit upside down for about a month
    By redemn93 in forum 2-Stroke Performance
    Replies: 20
    Last Post: 02-19-2009, 11:46 AM
  4. rxp-x letting me down!!!
    By mito lete in forum 4-Tec Performance
    Replies: 7
    Last Post: 08-10-2008, 09:54 AM
  5. How does the FX SHO "Wake Zone" mode differ from just letting the ski idle through?
    By skeeterzx225 in forum Yamaha PWC Performance (4-stroke)
    Replies: 31
    Last Post: 07-21-2008, 09:02 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts