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  1. #1
    Wrench's Avatar
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    '99 SLH 700 no spark

    Hey guys,

    I am trouble shooting a no spark issue. I have tested the stator and it appears good.

    There is power coming to the cdi box from the stator but no power going out to the coils. I am not an electrical guy but my thinking is the cdi is bad.

    Can I just replace the cdi (p/n 4060148 ) with the updated number?
    Or will I then have to replace the stator and coils with the update kit?

    Thanks guys
    Last edited by K447; 10-23-2016 at 09:36 PM.


  2. #2
    Click avatar for tech links/info K447's Avatar
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    Is the ignition system original or updated?

    If still original then both CDI and stator must be upgraded together, no mixing between Gen III and the original stator/CDI.

  3. #3
    Wrench's Avatar
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    I have no idea. The owner said it had a new engine put into and now doesn't have spark. Is there a way to check with out pulling the stator out?

  4. #4
    Click avatar for tech links/info K447's Avatar
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    Quote Originally Posted by Wrench View Post
    ... Is there a way to check with out pulling the stator out?
    Part number on the CDI indicates which version it is. Handwritten number overrides any factory printed number.

    For the stator, an ohmmeter can measure the stator coils. Gen III stator coil (exciter, not battery charging coil) has very different ohms from the older/original stator exciter coils. The measurements can be done by unplugging the stator wires inside the electrical box.

    See my signature links, red domestic engine sections, for the Gen III stator and ignition coil test methods and ohm values.

  5. #5
    Wrench's Avatar
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    Thanks,

    So instead of finding a used cdi with the same p/n I have it is better just to upgrade with the sbt kit?

  6. #6
    Click avatar for tech links/info K447's Avatar
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    Quote Originally Posted by Wrench View Post
    Thanks,

    So instead of finding a used cdi with the same p/n I have it is better just to upgrade with the sbt kit?
    Unless you know the CDI is the problem cause, do not assume it is.

    Often with original ignitions it is the stator that goes bad.

    The upgrade kit has had a much more reliable Gen III stator and CDI, so that would certainly be the 'better' method.

  7. #7
    Wrench's Avatar
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    Thank you for your time

  8. #8
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    K447 is right, the most reliable method is to replace the ignition system with the updated kit. Odds are the stator has an open coil. Been a while since I worked on one but I believe you want to check stator purple to ground and stator brown to ground. One should read 88 ohms and the other 1200ohms. If either is an open circuit the stator has failed.

    If you do find you need an update kit, I have a new open box SBT kit up for sale. Feel free to PM me if interested.

  9. #9
    Wrench's Avatar
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    Thank you

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