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  1. #1
    skyboy's Avatar
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    When a stator goes bad........

    Does anyone know what physically happens to the component(s) when they fail?

    Overheating? Melts wire varnish and shorts out? High current flow? Too much vibration?

    I recently bought an '97 SLT (to add to my fleet, lol) and the previous owner said he had the stator replaced last summer. I tried to get the old one but could not find it while I was there. I am curious to find out exactly what the mode of failure is, or are there various failure modes?

    If anyone can point me in the right direction I'd appreciate it.


    Marty
    Last edited by skyboy; 06-13-2013 at 06:08 PM.


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    My understanding, from what others have said, is that the original (Gen I and Gen II) domestic stators were made with rather fine wire windings. Over time these windings fail from the combination of vibration, heat and just age. The result is either open circuit or a wire short in one of the ignition related coils.

    The Gen III stators use windings with much thicker and heavier wire. These seem to be much more robust. Since the stator uses very different coils, the Gen III CDI also needed to be different to match the Gen III stator electrically. This is why you cannot use older stator or CDI with a Gen III version, the voltages from the stator are different.

    The Gen I and Gen II original stators have rather high coil ohm resistances, which is what you get when using many turns of fine wire in the coils;
    Black to Purple: 1200 ohms
    Black to Gray: 88 or 140 ohms

    Compare with the single Gen III stator coil, which uses fewer turns of much thicker wire;
    Exciter coil Black to Purple: 5.5 ohms

  3. #3
    skyboy's Avatar
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    Thanks!

    Apparently the Gen III stators are not immune from failure as well. Just trying to get a handle of the MTBF and whether or not I should look into building a coil winding apparatus. My SLT seller said his ski was down for several months last yr., unable to find a replacement stator.

  4. #4
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by skyboy View Post
    Thanks!

    Apparently the Gen III stators are not immune from failure as well. Just trying to get a handle of the MTBF and whether or not I should look into building a coil winding apparatus. My SLT seller said his ski was down for several months last yr., unable to find a replacement stator.
    Would this be something just for yourself, or something you might provide as a rebuild service?

    Up until recently there were a couple of stator rewinding companies that did Polaris stators. One or both of them no longer do so.

  5. #5
    skyboy's Avatar
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    Quote Originally Posted by K447 View Post
    Would this be something just for yourself, or something you might provide as a rebuild service?

    Up until recently there were a couple of stator rewinding companies that did Polaris stators. One or both of them no longer do so.
    When I had to rewind some source coils back in my motorcycle days, it was mostly a manual process. I was thinking something along those lines so I'm not sure I'd want to wind many coils that way. But, you never know. Might be a good retirement job...lol.

    Any idea why no commerical service does it anymore?

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