Home Forum Ask A Member 1936 Johnson 300 Parts manual or photos

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  • #266759
    Buccaneer
    Participant

      US Member - 1 Year (includes $3 online payment fee)

      The subject motor is missing some parts for the “Kill button”.
      There was a wire hanging loose below the magneto, that
      evidently hooked up to some kind of kill button in the hole
      shown in the photos.
      Laying loose inside of the hole was a round carbon brush.
      I have to think that I’m missing a button, spring and something
      to hook the magneto wire up to.

      I’m not sure why they would locate the kill button where they
      did, as I’d likely be floundering around, reaching back, looking
      forward, and grab the spark plug!

      Anyone have a parts manual for this motor, or photos of
      the kill button in question?
      Thanks.

      DSCN4892

      DSCN4891

      DSCN4893

      DSCN4875

      Prepare to be boarded!

      #266765
      tinkerman
      Participant

        US Member - 1 Year (includes $3 online payment fee)

        I can get you some pics later this evening

        It's a jungle out there.

        #266785
        Buccaneer
        Participant

          US Member - 1 Year (includes $3 online payment fee)

          I can get you some pics later this evening

          I just found a video of a 300 model on YouTube that does not
          show a push button, but rather a metal plug screwed in the side.
          Not sure what pieces I’m missing, but evidently it was some
          kind of contactor setup that killed the engine.

          Do you have photos of the bottom of the magneto, etc?
          P.S.- You don’t have to tear apart your motor to get photos!

          Thanks, Much appreciated!

          Prepare to be boarded!

          • This reply was modified 1 year, 6 months ago by Buccaneer.
          #266793
          Mumbles
          Participant

            It’s been a few years since I worked on my 300’s but if I remember correctly, they have an insulated screw on the mag plate which makes contact with ground when the speed control leaver is moved all the way to the left. It might have a flat or bell shaped washer on it which makes the contact, not sure.

            Near the end of the parts manual is the mag diagram showing this insulated screw assembly.

            Johnson-300-Parts

            #266803
            Buccaneer
            Participant

              US Member - 1 Year (includes $3 online payment fee)

              Thanks Mumbles! The parts diagram will help me rig something up that should work.
              Just a while ago, when checking spark plug routing, I came to the realization that
              the threaded hole on the port side of the motor is not for a kill button, but rather
              a friction plug for the magneto plate tension.
              However, on the end of the flange that the friction plug rides on, there’s a drilled hole,
              and that appears to be for the grounding assembly that kills the engine.

              Another mystery is the brass plate bolted on the mag bottom side. It shows it in
              the parts diagram, and has a part number for it, but I do not see it in the list.

              I also see what the spark plug wire hold-down clip, that I’m missing, looks like
              from the manual.
              Much appreciated!

              First photo shows where the plug wire hold-down should bolt to, and
              the mystery brass plate.
              DSCN4924

              I assumed that the condenser in mine, was a round condenser that someone
              soldered to the top of the old rectangular condenser can, and the diagram
              confirmed this.
              DSCN4918

              The kill switch hole, flange that the friction plug rides on, and again, the mystery brass piece.
              DSCN4920

              Prepare to be boarded!

              #266840
              Buccaneer
              Participant

                US Member - 1 Year (includes $3 online payment fee)

                FYI, the mystery brass piece on the bottom of the mag plate is no longer a mystery.
                As I was looking at it this morning, and wondered “Why is it cam shaped?”,
                I thought to see if it could be the throttle cam…….. sure enough, it is.
                It’s the tiniest throttle cam I’ve ever seen!

                Magneto about done…… hopefully a spark test later today.

                Prepare to be boarded!

                #266841
                Mumbles
                Participant

                  Get er running and I’ll race ya!

                  https://youtu.be/-wWAGHnOwGg

                  #266845
                  Buccaneer
                  Participant

                    US Member - 1 Year (includes $3 online payment fee)

                    Mumbles, that old gal sure runs nice!
                    I noticed today that the spark plug wires coming out of
                    the bottom, back of the mag plate, lay right on top
                    of the muffler, and the later is not water cooled.
                    Have you noted this to be an issue?

                    I can’t tell from the parts manual, but I presume
                    that there was originally some grommets where
                    the plug wires exit to “daylight”.
                    Did you have to make some new ones?
                    The last guy before me used a chunk of fuel hose for
                    a grommet. Works, but not the best looking.

                    DSCN4929

                    We now have spark on “Both” cylinders!
                    https://youtu.be/50RIOuDNrnA

                    Prepare to be boarded!

                    #266911
                    tinkerman
                    Participant

                      US Member - 1 Year (includes $3 online payment fee)

                      Ok buc I was a little later than later but just so you know I DO have one haha

                      It's a jungle out there.

                      #266919
                      Buccaneer
                      Participant

                        US Member - 1 Year (includes $3 online payment fee)

                        Ok buc I was a little later than later but just so you know I DO have one haha

                        Ever have it running yet? Kind of fun to work on something
                        a little out of the norm once in a while!

                        Prepare to be boarded!

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