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  1. #1

    1996 slt 780 no fire

    i am working on a 1996 sly 780. it was running good earlier 2day it was in limp mode. i unhooked m.f.d. then it ran great on the trailer took it 2 the river should have cranked it on the trailer just before launching but i didn't. put it in and it wouldn't crank but would try to. i pulled it out checked everything and came 2 the conclusion that it has no spark now? could unhooking the m.f.d. caused a prob? could i have burnt the stater? or c.d.i.?please help.!


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    Weak battery?

    Lanyard in place?

    Fuel selector turned on?

  3. #3
    BlueFishCrisis's Avatar
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    How did you come to the conclusion of no spark? What are your compression numbers? Did you use a spark tester to check for spark? Are you getting fuel to the cylinders? What type of plugs are you running??

  4. #4
    Quote Originally Posted by BlueFishCrisis View Post
    How did you come to the conclusion of no spark? What are your compression numbers? Did you use a spark tester to check for spark? Are you getting fuel to the cylinders? What type of plugs are you running??
    great compression. ngk bpr7es definitely getting fuel the plugs get soaked after trying to start for a while. i sued a screw driver it will give u a slight shock but you cannot see any arc. i also pulled all 3 plugs ant put them in the wires and looked for arc but none was visible.

  5. #5
    does the blue Fuji have a circuit breaker?

    if so where is it located?
    Last edited by K447; 05-27-2013 at 08:23 AM.

  6. #6
    BlueFishCrisis's Avatar
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    The circuit breaker is on the top of the electrical box. However, the motor will not turn over (starter won't spin) if this has popped.

    Suggest picking up a sealed spark tester from any automotive store to visually check for spark.

    If none, you will need to check your stator impedence values to ensure they are within tolerance.

    As K447 mentioned, I am sure you have your lanyard in place, correct??

  7. #7
    Quote Originally Posted by BlueFishCrisis View Post
    The circuit breaker is on the top of the electrical box. However, the motor will not turn over (starter won't spin) if this has popped.

    Suggest picking up a sealed spark tester from any automotive store to visually check for spark.

    If none, you will need to check your stator impedence values to ensure they are within tolerance.

    As K447 mentioned, I am sure you have your lanyard in place, correct??
    yes lanyard is in place i even took the kill switch apart everything looks good. its acts like the kill switch is grounded it just turns over just like it would if lanyard wasn't in place. it ran fine on the trailer in my shop. when i launched the ski it was would almost crank and wanted to start but wouldn't. now it dosnt ever try 2 fire. i had the hitting the rev limiter at 4200 problem so i un hooked the mfd. i crank it just after unhooking mfd and it did great. hookd up to the trailer and fired it once more b4 leaving for the water test. when i launched it never cranked but would try for sure. but now it just spins over just like no lanyard in place. do you think unhooking the m.f.d. could have caused it?

  8. #8
    Click avatar for tech links/info, donation request K447's Avatar
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    Have you confirmed strong battery voltage while cranking?

  9. #9
    Polarisitis loonatik's Avatar
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    I had similar problem on an SL780 and it turned out to be a shot stator. If I take one plug out and ground it, it sparked and ran fine on remaining two cylinder. My first thought is bad grounding somewhere, but as I kept checking it turned out to be the stator.
    Stator testing info is at link below:
    http://www.greenhulk.net/forums/showthread.php?t=98103

  10. #10
    Quote Originally Posted by loonatik View Post
    I had similar problem on an SL780 and it turned out to be a shot stator. If I take one plug out and ground it, it sparked and ran fine on remaining two cylinder. My first thought is bad grounding somewhere, but as I kept checking it turned out to be the stator.
    Stator testing info is at link below:
    http://www.greenhulk.net/forums/showthread.php?t=98103
    thanks for the help i haunt had time 2 check it yet just got off work i will keep u all updated

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