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  1. #1

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    Need Help: 2000 785 PRO No Spark

    I bought a 2000 785 PRO awhile ago with no spark. I am just getting motivated to work on it since summer is coming so I was looking for some advice on where to start. Is there a common failure? Where should I start? What tests can I perform? Any specifics you can give would be great. Thanks in advance.


  2. #2
    ryandi2's Avatar
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    i would ohm test the stator and cdi.. i would also check the plug wires them selves.. take the boots of the plug wires and if corroded clip back little too clean it up and reattach boot,

    but other then that i dont know anything about the pro.. some one on here will get you better info

  3. #3
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Start with a known good battery. Must supply at least 10.5V WHILE CRANKING.

    Make sure the lanyard is attached. OR remove the kill switch wire from the circuit board inside the elec box.

    Ohm test the stator. (there is no way to test a CDI, you merely eliminate all other parts you can test from the equation. And when all else fails, you then replace the CDI)

    Ohm test the coils.

    Make sure the battery ground is clean and tight.

  4. #4
    ryandi2's Avatar
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    [QUOTE=xlint89;1359580

    Ohm test the stator. (there is no way to test a CDI, you merely eliminate all other parts you can test from the equation. And when all else fails, you then replace the CDI)

    [/QUOTE]


    dohh thats something knew too add too the memory file!

  5. #5
    bowsniper's Avatar
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    Can we get a little history on the ski?

    Was it ever swamped or sunk or had a water leak?
    if it was sunk. All the wiring could be bad or other parts that rusted away

    Has the ski sat forever and was never ran? That could cause bad connections or corrosion.
    Has it ever been in salt water?

    Any spark at all from the plugs? 1.2.3 or none?

    Have you tried cutting the plug wires back like randyi suggested?

    How do you know its spark and not a timing issue like the crank is out of phrase. ? it wont run like that either.

    Is the flywheel on correct?

    Has the previous owner tried to fix anything?

    Parts missing by chance?

    What have you tried so far?

    Are you using new plugs to check for spark? fouled plugs will not fire.

    Does it turn over at all?

    Does it spin by hand?

    Compression good?

    Just trying to get familiar with your ski.

    When trying to figure anything out on each ski. we need to know all known history to it..

    Did the owner tell you that it just dies all of a sudden? or has this problem just recently started when you were on the ski?

    How old is the battery?

    Did you load test it?

    Was it fully charged? then tested?

    Batteries are big deals on jetskis.

    Maybe crack open the cdi box and see whats going on in there as far as corrosion or blown fuses and loose wiring.

    The ground connection to the plate should be tight and clean looking.

    Just a few ideas to try.. The tech section has lots of procedures for checking spark,coils and other electrical items..

    xlint has a good idea with disconnecting the wire for the kill switch. if that goes bad, it will look like no spark.

    I have the same ski as yourself. So i would like to know the result also.

    If you havent already, stick your head in the ski and really get to know every piece. It's not all that complicated once you look at whats where and whats what.. Theres only so much it could be..

    Start eliminating things like corrosion,loose fittings,connections, battery connections, plugs loose,plug wires loose,burnt looking wires, discoloration of wires, bad boots, correct gaps,spliced wires, undercharged battery or owner induced repairs....ie splicing,bad tape job or crimp job under tape.

    Noone can just assume that the ski never was touched by a backyard mechanic, a Pro,Mechanic,or a neighbor!.lol

    No spark to me sounds like.. Hmmm...I'd check the coils and see if they have juice after I charged the battery. Although...3 coils wont take a crap on ya all at once. Maybe 1 would go bad.

    Did you only check 1 plug for spark? Did you check all three? A 3 cylinder is basically 3 individual engines running with a common crank.

    If the compression is real low and you do have spark, it will act like it doesnt have spark. it wont fire.....

    If the motor isnt cranking fast enough, it wont turn over either.. check that battery!

    Does the MFD work? whats the batt voltage displayed?

    Was any major work done to the ski that you know of?

    Is there any tell tale signs that the engine has been removed or does it look like its never been touched.? guess thats hard to tell if its been a while since service..

  6. #6

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    Thanks everyone for your responses. It has no spark at all on any cylinder so I thought I could rule out the plug wires or coils. I was thinking a broken wire, bad switch or bad stator. Does anyone know what ohms the stator should read and across what color wires. I was using a good new battery I did know about this as it happened to my brother on an SLTX. I jumped across the solenoid because it was just clicking but this shouldn't matter for spark correct? The former owner said he was just riding it and it quit and would never run again. It ran last year. He wasn't very mechanical. It doesn't appear to have ever been apart or sunk but who knows for sure. It turns over fine it just has no spark.

  7. #7

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    And the MFD does not work I am looking for one in the classified section

  8. #8

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    there's all the info you need in the tech section
    i have all the parts you need so let me know what the stator ohms out at and will go from there

    pics of the electic box opened up will help also

  9. #9
    Moderator beerdart's Avatar
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  10. #10
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Most, if not all info you seek is in the tech section.

    It's just a matter of finding it in there.

    Let us knoiw what the stator ohms out to.

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