1930 fold light coil replacement

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  • January 28, 2026 at 1:09 pm #303992
    RICHARD A. WHITE
    Participant

      Lifetime Member

      This stuff hurts my brain…

      http://www.richardsoutboardtools.com
      classicomctools@gmail.com

      January 28, 2026 at 1:20 pm #303993
      Tubs
      Participant

        The Atwater-Kent timer is a battery ignition.  

        A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.

        January 28, 2026 at 1:31 pm #303994
        RICHARD A. WHITE
        Participant

          Lifetime Member
          Tubs wrote:

          The Atwater-Kent timer is a battery ignition.  

          Is that why they make sparkies when the points close?

          http://www.richardsoutboardtools.com
          classicomctools@gmail.com

          1 user thanked author for this post.
          Tubs
          January 28, 2026 at 1:53 pm #303996
          JACQUES
          Participant

            probably  it is more of a fit  issue  than electrical .. not to many options anyway    jolting the primaries on a OMC coil should create a spark on the plug.

            trial and error and if it works great

            Pesonnaly I have no wire diagrams or docs  to consider making any further comments .

            but if it works  another generation OB will live on.

            You would become  Dr. Christiaan Barnard of coil transplants  !

             

            Joining AOMCI has priviledges 🙂

            1 user thanked author for this post.
            stanley
            January 28, 2026 at 2:09 pm #303997
            Tubs
            Participant
              RICHARD A. WHITE wrote:
              Tubs wrote:

              The Atwater-Kent timer is a battery ignition.  

              Is that why they make sparkies when the points close?

              It happens so fast. Could it be that the spark you see occurs when the points open?

               

              A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.

              January 28, 2026 at 2:23 pm #303999
              RICHARD A. WHITE
              Participant

                Lifetime Member

                Tubs,
                Them Atwater points can’t spark until the points make contact, THE OMC can’t spark until the points open, and yeah them Atwater systems is quick.
                I don’t think either can be actually visually seen with the neked eye.

                http://www.richardsoutboardtools.com
                classicomctools@gmail.com

                January 28, 2026 at 5:13 pm #304007
                Waunnaboat
                Participant

                  US Junior Member

                  I would try to clean up the points and then test it on the motor.  you have to get some momentum on the flywheel until it will produce a very visible spark and that is difficult when you don’t have the ignition system attached to the motor.  Could there also be something to be said about the wire that leads to the button on the handle needing to be grounded or something like that?

                  "Outboards seem to multiply exponentially..........I find that for every finished project, there are two more waiting to be completed."

                  January 28, 2026 at 9:57 pm #304026
                  Tubs
                  Participant

                    .

                    A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.

                    1 user thanked author for this post.
                    stanley
                    January 29, 2026 at 9:17 am #304034
                    Tubs
                    Participant

                       

                      Video link   https://www.youtube.com/shorts/gOxWYz199c4    

                      A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.

                      January 30, 2026 at 11:16 pm #304127
                      JOSEPH BRINCAT
                      Participant

                        US MEMBER PAY BY CHECK

                        To pick up on Richard’s post … the Atwater – Kent timer has always been a mystery to me. They work great and make a hot spark, but just how the points do the job on a battery ignition system is a mystery. The points are not operated by the normal cam. The points stay open so no current flows regardless of the rotational position of the crankshaft. no fear of draining your battery when you stop the motor. How do the points operate, you ask.. there is a “trick” mechanism in the timer that cocks a tiny hammer that when released bumps the points closed for just the tiniest instant of a milli second. Hard to believe but the only time that current flows is during that tiny milli second. So all the requisite charging and dis-charging of coil and capacitor happens then… those little electrons are really speedy!

                        Joe B

                        To help understand .. the points are not on a normal breaker arm. The movable point is on the end of a flexible strip of spring steel.

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