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  1. #1
    pro12,txi,msx140 SMOKEWAGON's Avatar
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    2003 msx 140 @200 hours

    My 2003 msx 140 went over 200 hours recently, any known wear items to look at or replace?? It has been problem free so far except on a rare ocassion it just shuts off but will restart instantly.


    smokewagon,


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by SMOKEWAGON View Post
    My 2003 MSX 140 went over 200 hours recently, any known wear items to look at or replace??
    It has been problem free so far except on a rare occasion it just shuts off but will restart instantly.
    smokewagon
    You might be looking at the beginning of an intermittent electrical problem.

    Next time you are in the mood, verify that the grounds are still solid at the motor, and look for places where the wiring loom might be flexing too much during riding, or pulling on a connector. Excess flexing over time will fatigue wires and connections.

    While it is running on the hose, or on the water with the seat off, you might reach in and firmly push and pull on any suspect wiring, see if it reproduces the random shutdown problem.

    If it is electrical, they never fix themselves, at least not for very long. If the problem suddenly becomes worse, you might experience a no-restart situation, which would not be good if you are on the water.

    Another thought. Have you verified that all Polaris Service Bulletins for the 2003 MSX 140 were attended to on your boat?

    There might also be a Polaris technical note regarding the intermittent shut down problem. Might want to ask a dealer to check their system for any helpful clues. Or ask Ph2ocraft...

  3. #3
    ph2ocraft's Avatar
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    Mine did the same thing, it wound up being the screws backing out of the stator plate. Another common cause is a loose or poor connection in the electrical box.
    My 03 would be cruising along sort of slowly in choppy water, hit the wake and shut down. Hit the start button and away I could go until one day it just wouldn't start anymore. Replaced the stator screws to the newer shorter units and no more problems.

  4. #4
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by ph2ocraft View Post
    Mine did the same thing, it wound up being the screws backing out of the stator plate. Another common cause is a loose or poor connection in the electrical box.
    My 03 would be cruising along sort of slowly in choppy water, hit the wake and shut down. Hit the start button and away I could go until one day it just wouldn't start anymore. Replaced the stator screws to the newer shorter units and no more problems.
    These are screws in the flywheel, or part or the electrical stator itself?

    Photo?

    2003 MSX 140 only, or could this problem also appy to 2004 MSX 140?

  5. #5
    ph2ocraft's Avatar
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    This was only an issue with the early run 03's.
    The screws would get torqued to the required spec BUT alas the screws were a hair too long and the plates over time will loosen creating various electrical issues.
    I really can't think of an issue with the 04's that wasn't high time or distance related.

  6. #6
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by ph2ocraft View Post
    This was only an issue with the early run 03's.
    The screws would get torqued to the required spec BUT alas the screws were a hair too long and the plates over time will loosen creating various electrical issues...
    Was there a Service Bulletin for this screw problem?

    I am still having trouble visualizing what screws we are talking about.

  7. #7
    ph2ocraft's Avatar
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    Right here.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  8. #8
    ph2ocraft's Avatar
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    I found a better picture #18.

  9. #9
    Click avatar for tech links/info, donation request K447's Avatar
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    Arrow Early 2003 MSX 140 electrical stator problem, plate mounting screws were too long

    Quote Originally Posted by K447 View Post
    I am still having trouble visualizing what screws we are talking about.
    Quote Originally Posted by ph2ocraft View Post
    I found a better picture, part #18.
    Ah, so that plate is fastened to the inside back of the flywheel housing.

    If the screws loosen, the plate would jump around, and the electrical signals to the EMM would be confused, or weak.

    Have I got this straight?
    Last edited by K447; 04-07-2008 at 08:02 PM.

  10. #10
    pro12,txi,msx140 SMOKEWAGON's Avatar
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    It usually shuts off when you back off the throttle real fast.

    Can you see if the bolts are lose without removing the front cover?

    smoke,

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