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1985 Suzuki DT-40 no spark

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  • 1985 Suzuki DT-40 no spark

    Hello,

    I purchased a boat that came with a 1985 Suzuki DT-40 about four years ago. After some minor initial maintenance, the boat ran perfectly and continued to do so until about a week ago. I went out one night for about four hours, returned to the dock and everything was fine. The fishing was great that night, so I decided to come back the next day and spend the whole day on the lake. Upon launching the next day, I attempted start the motor, which was very obviously turning but not firing. I waited about an hour thinking that I may have somehow flooded it. After an hour, it was still not firing at all. I re-trailered the boat and Headed for home.

    The rest of the day was spent troubleshooting and I determined that there was absolutely no spark at either plug. I checked all wires, which appeared to be fine and looked for any other obvious problems (there were none). I looked at the kill switch - I actually super-glued on the piece that kills the engine when it becomes detached, as I had bumped it one time and been dead in the water for about three hours - but there didn't appear to be a problem there either.

    Anyone have any idea why the spark would quit so suddenly?

    Thanks in advance!

  • #2
    Disconnect your killwire from cdi unit.Should be a black and white wire. If it starts replace your killswitch.Superglueing anything on an outboard is not a good idea.

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    • #3
      Thank you for the quick reply! I will disconnect the killwire from the CDI unit to see if that helps. Just to be clear, I superglued the the little rubber plug (that is probably supposed to connect to life jacket or something via a cord - like on a PWC) that connects to the controls and kills the engine if it comes off. I realize that this may be a safety issue but was worried that it would come off and become lost, which would be a problem.

      Thanks again!

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      • #4
        Should have mentioned that you won't be able to switch off the engin with killwire disconnected.Just ground killwire to engine block to kill engine.

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        • #5
          It worked! Thanks for your help!

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