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  1. #1
    PWCToday Regular TLH101's Avatar
    Join Date
    Jun 2016
    Location
    Elephant Butte, New mexico
    Posts
    117

    MSX 140 with Hi Speed Engine Miss

    I got this 2003 MSX 140 for about the price of the trailer, so it may be worth fixing. It runs great on the trailer, but since we don't jetski on trailers, I gotta solve the issue.
    Under load is has a bad miss. I pulled the plugs and they all look to be burning ok. I took this vid today to better show my issue. You can get a good idea of the issue, before the wind noise drowns out the sound. You can also see the RPM variation.
    Video: https://www.youtube.com/watch?v=B9cgOQ7I-MA
    Attached Images Attached Images

  2. #2
    PWCToday Newbie
    Join Date
    Dec 2006
    Location
    Burnet, TX
    Posts
    38

    Re: MSX 140 with Hi Speed Engine Miss

    Have you checked the jet pump?

    Sent from my SAMSUNG-SM-G891A using Tapatalk

  3. #3
    PWCToday Newbie
    Join Date
    Dec 2006
    Location
    Burnet, TX
    Posts
    38

    Re: MSX 140 with Hi Speed Engine Miss

    It sounds like it might be hitting the rev limiter and the speed seems low for the engine RPM.


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  4. #4
    PWCToday Newbie
    Join Date
    Dec 2006
    Location
    Burnet, TX
    Posts
    38

    Re: MSX 140 with Hi Speed Engine Miss

    If the pump is in good shape I would say there is some sort of issue with the ficht fuel injection system. This is the same system used on the Polaris Genesis i and Virage txi. There is a load of information on it over on Greenhulk in the Polaris technical section.

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  5. #5
    PWCToday Newbie
    Join Date
    Jul 2017
    Location
    MO
    Posts
    7

    Re: MSX 140 with Hi Speed Engine Miss

    Yup.. i would start here http://polarispwcknowledge.shorturl....t-things-to-do

    Things I would first check include spark, fuel pressure (notorious for fuel pressure problems), and voltage, both stator and the 40 volt side, and TPS (another common problem).

    Sent from my SAMSUNG-SM-G920A using Tapatalk
    Last edited by bfarnam; 08-22-2017 at 01:53 AM.

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