Help Spark at end of start cycle
pxctoday

» Log in

User Name:

Password:

Not a member yet?
Register Now!

» Find OEM Parts

» Jobs

» wallpapers

Page 1 of 2 12 LastLast
Results 1 to 10 of 12
  1. #1
    PWCToday Newbie
    Join Date
    Sep 2019
    Location
    Scotland
    Posts
    8

    Help Spark at end of start cycle

    I am sure this has probably been asked before, but my circumstances are as follows:

    Kawasaki 750SX 92(ish)
    Replaced Coil
    Plug Caps
    New Plugs
    New Bendix
    New Stator

    Checked Starter button for continuity and earth - All OK

    Ski was running last summer, towards the end of a run it cut out in deep water, then wouldn't start again. Stripped the e-box to check all connections, stripped front end off to check pick up and stator, re-put all back together and turns over strong and occasionally fires up, however spark is only as I release the start button on both plugs.
    I am getting really frustrated as I cannot think what this could be after the amount of money and time spent on this, so any help advice would be greatly appreciated.

  2. #2
    PWCToday.com Is My Home Away From Home Myself's Avatar
    Join Date
    Jun 2006
    Location
    Arkansas
    Age
    45
    Posts
    7,220

    Re: Help Spark at end of start cycle

    Make sure your battery is not dropping out too much voltage while cranking.
    If that's good you can try baking the cdi in a countertop oven at 200-250 degrees for about 20 minutes. That trick seems to have about a 50% success rate. If that still fails then you probably will need a cdi.
    http://www.facebook.com/twinlakesjetskirepair

    '89 Kawi 650SX 42.4 GPS
    +3" stock pipe, ported ex. manifold, drilled waterbox, blueprinted pump, Ocean Pro ride plate

    '99 Yama GP1200 65U 61.8 GPS
    ported cylinders, matched cases, milled head, blueprinted pump, long ride plate

    '96 Seadoo HX 717 53.13 GPS
    light porting, massaged cases, lightened flywheel, port matched manifolds, Rossier pipe, stubby pump cone

  3. #3
    PWCToday.com Is My Home Away From Home WFO Speedracer's Avatar
    Join Date
    Aug 2006
    Location
    Al-ugh-bam-ugh
    Posts
    28,202

    Re: Help Spark at end of start cycle

    What kind of stator did you put in the ski
    Y'all know me, still the same O.G. but I been low-key
    hated on by most these &^$$@s with no cheese, no deals and no G's, no wheels and no keys, no boats, no snowmobiles, and no skis, mad at me cause I can finally afford to provide my family with groceries

    WWSRD , What would Speed Racer do ?

  4. #4
    Top Dog JC-SuperJet's Avatar
    Join Date
    Jul 2013
    Location
    Cypress, TX
    Posts
    1,562

    Re: Help Spark at end of start cycle

    "spark is only as I release the start button on both plugs."

    Bad CDI

  5. #5
    PWCToday Newbie
    Join Date
    Sep 2019
    Location
    Scotland
    Posts
    8

    Re: Help Spark at end of start cycle

    Thanks for replies
    Stator was brand new, for my make and model.
    Is there anyway to test the CDI or any other symptoms that would indicate CDI is gone. Don't really want to fork out the cash for a new CDI at this stage, already spent way too much on this for what it's worth.
    Last edited by chrisareid; 07-12-2022 at 11:13 AM.

  6. #6
    PWCToday.com Is My Home Away From Home SxiPro's Avatar
    Join Date
    May 2005
    Location
    Right here
    Posts
    13,449

    Re: Help Spark at end of start cycle

    Quote Originally Posted by JC-SuperJet View Post
    "spark is only as I release the start button on both plugs."

    Bad CDI
    Not always. A croaked coil on a stator can do this as well. Been there, done that.
    Changes aren't permanent, but change is.

  7. #7
    PWCToday.com Is My Home Away From Home wmazz's Avatar
    Join Date
    Jul 2013
    Location
    Riverside, CA
    Age
    62
    Posts
    3,336
    Blog Entries
    6

    Re: Help Spark at end of start cycle

    That is common on Kawasaki engines. It sparks just as you let off on the
    start switch, or you push the start switch and it sparks only once.

    Is your stator new (but not oem Kawasaki) or used?

    Perform a ACv test on the stator.

    Fully charged battery, Spark plugs installed, ground the plug
    caps to the cylinder head nuts or the e-box, leave the connectors
    connected, lanyard in place (if you have one), crank over the engine
    and measure each pair.

    Red to purple =
    Red to Black =
    Blue to green =



    Bill M.

    It wouldn't hurt to test the spark plug wire cores without the caps
    for 3.5K to 4.7K ohms
    Last edited by wmazz; 07-13-2022 at 03:04 AM.
    Horsepower == Speed, RPM != Speed



  8. #8
    PWCToday.com Is My Home Away From Home wmazz's Avatar
    Join Date
    Jul 2013
    Location
    Riverside, CA
    Age
    62
    Posts
    3,336
    Blog Entries
    6

    Re: Help Spark at end of start cycle

    Quote Originally Posted by Myself View Post
    (1) Make sure your battery is not dropping out too much voltage while cranking.

    (2) If that's good you can try baking the cdi in a countertop oven at 200-250 degrees for about 20 minutes.
    If the battery is low the JS750 might have problems cranking?
    The JS750 is a magneto-cdi, no battery ignition.

    That is a great test if you have a running engine that looses spark
    intermittently or after 20 minutes or so. But my preference is heating
    the stator first with a heat gun.


    CDI is tested with very last, process of elimination and then a
    peak dc voltage test on the primary wires to confirm if the cdi
    is capable of creating a spark. 150v or greater.


    Bill M.

    Heat and vibration kills electrical parts, so the stator is #1 on
    that list, the ignition coil (heat). Kawasaki spark plug wires are
    brittle and break (more common on the 650, 750 sit downs).

    Rust is another possible cause for ignition problems on the stator
    or coil. Bad front cover or starter motor o-rings.
    Last edited by wmazz; 07-13-2022 at 03:49 AM.
    Horsepower == Speed, RPM != Speed



  9. #9
    PWCToday.com Is My Home Away From Home wmazz's Avatar
    Join Date
    Jul 2013
    Location
    Riverside, CA
    Age
    62
    Posts
    3,336
    Blog Entries
    6

    Re: Help Spark at end of start cycle

    Quote Originally Posted by Myself View Post
    If that's good you can try baking the cdi in a countertop oven at 200-250 degrees for about 20 minutes. That trick seems to have about a 50% success rate. If that still fails then you probably will need a cdi.
    Myself, that was a repair method not a diagnoses tool?
    You have mentioned that before right?

    Sorry for the confusion

    Bill M.
    Horsepower == Speed, RPM != Speed



  10. #10
    PWCToday.com Is My Home Away From Home Myself's Avatar
    Join Date
    Jun 2006
    Location
    Arkansas
    Age
    45
    Posts
    7,220

    Re: Help Spark at end of start cycle

    Yes, a possible repair........ it's an trick I learned from an old school repair guy. NOT a diagnosis, just a 'hail Mary" if you find a bad cdi.
    http://www.facebook.com/twinlakesjetskirepair

    '89 Kawi 650SX 42.4 GPS
    +3" stock pipe, ported ex. manifold, drilled waterbox, blueprinted pump, Ocean Pro ride plate

    '99 Yama GP1200 65U 61.8 GPS
    ported cylinders, matched cases, milled head, blueprinted pump, long ride plate

    '96 Seadoo HX 717 53.13 GPS
    light porting, massaged cases, lightened flywheel, port matched manifolds, Rossier pipe, stubby pump cone

Page 1 of 2 12 LastLast

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Powered by vBadvanced CMPS v4.2.0