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Paging Mr. Rod Bolt

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  • Paging Mr. Rod Bolt

    2001 Yamaha OX66 250HP SX250TXRZ
    #1 is without spark. or intermittently fires but mostly without.
    With my timing light hooked up and with motor on hose,
    I crank it up and engine goes straight to high warmup idle and while on high idle
    #1 sparks good for about 5 seconds and then maybe blinks the timing light once or twice every 4 or 5 seconds
    # 3 does the same intermittent spark but mostly not firing at all and # 5 is with out spark the entire time.
    Engine idle falls down to normal shortly thereafter as it should.
    It's not my timing light, as #2 #4 and #6 (the port bank) are firing fast and consistently.
    So basically, my starboard bank's spark is not there or intermittently flashes on very briefly here and there.
    I have looked at and swapped coils and caps.......not the issue
    I have followed and inspected everything, wires and plugs for broken or corroded or chaffed......everything looks great
    If I am not mistaken, isn't the entire ignition basically the stator, the pulse coil under stator and the CDI?
    I popped the flywheel off and everything looks real nice under it, I swapped the pulse coil with a good spare I had and no change.
    I am hoping it is a stator, i don't have a VOM with ability for peak reading nor sure I would understand how to test anyway.
    I have it off and on the bench, I have a VOM.....anyone know what I should ohm out and what it should spec on bench?
    Shift interrupt switch tests fine
    If you were a betting man, stator or CDI unit or something else?
    Thank in advance for any help

  • #2
    Mr. Rod Bolt has long since left the building. Apparently never to be heard from again.

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    • #3
      Well he certainly knew his stuff. I am sure there are other fine techs on here as well.
      Thoughts? Anyone ?

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      • #4
        I am not much help, but search for CDI electronics trouble shooting guide on the web

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        • #5
          bump for your thoughts, stator or CDI or something else?

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          • #6
            that is the reason for troubleshooting, to find out what the problem is

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            • #7
              Fixed - was CDI unit

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              • #8
                well did you test things or just throw parts at it and hope?
                could it have been a bad connection in the wiring to the CDI?

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                • #9
                  Originally posted by 99yam40 View Post
                  well did you test things or just throw parts at it and hope?
                  could it have been a bad connection in the wiring to the CDI?
                  another helpful post, thanks again,

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                  • #10
                    Originally posted by NC Pirate View Post

                    another helpful post, thanks again,
                    so it sounds like it was a shot in the dark

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