Results 1 to 6 of 6
  1. #1
    Altron's Avatar
    Join Date
    Sep 2006
    Location
    Klamath Falls, OR
    Posts
    91

    MSX 150 won't get above 5000 RPM's

    Hello All,

    It has been a while since I have posted and it has been a while since I had the craft in the water. First weekend out everything ran beautifully. However this weekend I took it out and it would not get above 5,000 RPM's. I seem to recall having this problem a long time ago but I can't remember what I did to fix it. Your help is greatly appreciated.

    Thanks, Alan


  2. #2
    Redrum's Avatar
    Join Date
    Oct 2011
    Location
    Iron River, WI
    Posts
    161
    Did you roll it when riding it the previous weekend? Also check the waste gate arm to see that it moves freely. There will be resistance but you can move it by hand.

  3. #3
    ripcuda's Avatar
    Join Date
    May 2010
    Location
    Newman Lake, WA
    Posts
    2,389
    +1
    166
    A rev limit around 5k... would most likely point to a possible overboost condition. When detected, the ECU display a check engine light and limit the RPMs to 4800. Sound like what you experienced?

    As Red mentioned... check the turbo wastegate arm to ensure it moves and is not seized (semi-common issue).

    Cheers!

  4. #4
    Altron's Avatar
    Join Date
    Sep 2006
    Location
    Klamath Falls, OR
    Posts
    91
    Sorry for not updating sooner. I found the problem. The throttle body had worked its way loose off the manifold. Tightened everything back up and she ran great again.

  5. #5
    Altron... I am having this same problem and was wondering where you found this problem. I'm not a mechanic and do not know where the throttle body and manifold are. How do I check this? Where do I look in the ski? Any pics would help tremendously. Thanks in advance!

    Hobnobber

  6. #6
    ripcuda's Avatar
    Join Date
    May 2010
    Location
    Newman Lake, WA
    Posts
    2,389
    +1
    166
    Welcome Hobnobber.

    The throttle body sits on the intake manifold (right side of ski... battery side) between the two runners that bolt to the engine head. It has a big hose connecting to it off the hard pipe (the pipe that connects to the intercooler). Remove all these hoses and you see the throttle body. It bolts to a rubber "boot" that seals to the intake manifold via a large hose clamp. Make sure this "boot" is secure and has no tears in it... and that the throttle body is bolted securely to it.

    If in doubt about parts... you can alway ebay search them (ex. Polaris MSX 150 throttle body)... then you can look at the pictures and see the part... then find it on your engine.

    Check out this link for lots more good information: (see the MSX 150 link there)
    http://polarispwcknowledge.shorturl.com/

    Cheers!

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. 96 SL 780 won't rev above 2500 rpm
    By twinSL780s in forum Polaris Open Discussion
    Replies: 3
    Last Post: 09-05-2009, 10:07 PM
  2. MSX 150 Will Not go over 2900 RPMS
    By rtburns in forum MSX/Matrix
    Replies: 3
    Last Post: 07-01-2009, 10:47 PM
  3. 00xp surging above 5000 rpm
    By RCS in forum 2-Stroke Performance
    Replies: 12
    Last Post: 06-15-2009, 07:49 PM
  4. Polaris Genesis won't go over 5000 rpms...
    By thedoc in forum Polaris PWC Performance
    Replies: 6
    Last Post: 06-20-2008, 09:55 AM
  5. MSX 150 won't start back up
    By Todd in forum Polaris Open Discussion
    Replies: 20
    Last Post: 04-28-2007, 07:26 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
  •