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  1. #1

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    99 SLH 700 no spark

    Hey. I am having a problem with my 99 SLH 700 with no spark. I just did the update kit on it and it was running good other that not starting real good after it was off for a few minutes ( I did the service bulletin PWC 00-05) After reading some past posts I checked and it has spark when you hold down the bilge button. Checked all of my connections in the box, swapped out the LR module as I have a spare and that wasn't the problem.
    Any ideas?
    Thanks
    Brad


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by bad brad 22 View Post
    Hey. I am having a problem with my 99 SLH 700 with no spark. I just did the update kit on it and it was running good other that not starting real good after it was off for a few minutes ( I did the service bulletin PWC 00-05)

    After reading some past posts I checked and it has spark when you hold down the bilge button.

    Checked all of my connections in the box, swapped out the LR module as I have a spare and that wasn't the problem.
    Any ideas?
    Thanks
    Brad
    Does it start and run if you hold down the Bilge button?

    Undo the PWC-00-05 changes and restore the CDI to factory configuration. Does it now start and run?

  3. #3

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    I will try that tomorrow. Thanks for your time K447.

  4. #4

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    Well I Undid the PWC-00-05 changes and it started but sounded noisy so I did a compression test and it was low on the back cylinder. Pulled the head and it chewed up a piston ring. Looks like I am back to the start when I bought this machine and had the same problem. Thought I had an intake leak problem resolved that was the culprit. Guess not.
    Thanks for your expertise again K447.
    Back to the drawing board.

  5. #5

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    Hey K447. Why was my ski running with the PWC-00-05 changes and then all of a sudden stopped it from sparking?

  6. #6
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by bad brad 22 View Post
    ... I Undid the PWC-00-05 changes and it started ...

    Quote Originally Posted by bad brad 22 View Post
    ... Why was my ski running with the PWC-00-05 changes and then all of a sudden stopped it from sparking?
    The wiring change for PWC-00-05 does correct a no-warm-restart problem, but it also makes the ignition slightly more sensitive to a borderline weak battery. There is a small voltage drop through the LR module that is now feeding the CDI via the Orange wire.

    My suspicion was that your battery was right on the edge and the voltage loss through the LR module Orange wire was enough to cause no spark. Sometimes pressing the bilge button will boost the Orange wire voltage to the CDI just enough to allow the CDI to fire the engine up.

    And sometimes the LR module goes bad and the Orange wire output is too little voltage even though the battery is strong.

    Undoing the PWC-00-05 wiring change and restoring the direct CDI connection to Red/Purple maximizes the voltage available to the CDI.

    Service Bulletin PWC-00-05 is only required if the CDI is suffering from no-warm-restart condition. If the engine is starting and restarting without difficulty then there is no need to make the wiring change.

  7. #7

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    Well I found the problem. The crank went!
    Gonna have to check out if there is any damage to the cases.

  8. #8
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by bad brad 22 View Post
    Well I found the problem. The crank went!
    Gonna have to check out if there is any damage to the cases.
    How is a crankshaft problem causing a no spark condition?

  9. #9

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    Quote Originally Posted by bad brad 22 View Post
    Well I Undid the PWC-00-05 changes and it started but sounded noisy so I did a compression test and it was low on the back cylinder. Pulled the head and it chewed up a piston ring. Looks like I am back to the start when I bought this machine and had the same problem. Thought I had an intake leak problem resolved that was the culprit. Guess not.
    Thanks for your expertise again K447.
    Back to the drawing board.
    Problem I found after resolving the spark issue.
    Looks like it was more than just a piston ring!!

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