Home Forum Ask A Member 1932 Johnson K-50 8 hp questions

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  • #74400
    Doug Wilson
    Participant

      US Member - 2 Years

      I used 60s chevy condensers and mounted them in the holes the originals came out of then made aluminium plates to cover them also if replacing plug wires cut off an inch or so from coil and solder there and shrink wrap less chance of damaging the coil

      Doug

      how is it motors multiply when the garage lights get
      turned off?

      #74403
      Buccaneer
      Participant

        US Member

        Worked on the magneto today. Not done, but got a good start.
        Found the Johnson specs for the condensers, and they should
        be .22 mfd’s.

        The original rectangular ones measured at .23 mfd and the
        "added on" parallel wired condensers measured at .21 mfd’s,
        for a whopping total of .44 mfd’s.
        The points were not pitted, just full of powdery oxide.
        If the carb job was buggered up the same time as the extra
        condensers were added, it probably never ran again to "pit"
        the points.

        I presume that this is the original magneto, and therefore surprised
        to see that Johnson was using that P.I.T.A. little clip holding
        to points on way back in 1932!


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        #74434
        squierka39
        Participant

          US Member

          Looking good. Yes that is the correct magneto for your motor, you can tell because it has the elbows underneath for the spark plug wires. The later plate just has a hole and a rubber grommet.

          #74450
          Buccaneer
          Participant

            US Member

            Made a little more progress on the magneto, but got a "hair brained" idea
            to put a capacitor inside of the original rectangular condenser case.
            I was always curious what the inside of one of those style condensers
            looked like anyway. Second condenser rebuild went faster, but
            I wouldn’t want to do it for a living. 😉


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            #74488
            Mumbles
            Participant

              Would you have a P/N or a link for those caps?

              #74490
              Buccaneer
              Participant

                US Member

                0.2µF Film Capacitor 400V Polypropylene (PP), Metallized Radial
                Digi-Key Part Number P12106-ND
                Manufacturer Part Number ECW-F4204JL

                https://www.digikey.com/products/en?keywords=P12106-ND

                quote Mumbles:

                Would you have a P/N or a link for those caps?

                Prepare to be boarded!

                #74505
                squierka39
                Participant

                  US Member

                  I’ve always wanted to see inside those square caps too, thanks now I have. Looks like it will be a good runner. Don’t skimp on the oil, the K-50 did not have the oil line going to the top bearing like the later motors do. Even with the added line they also specified more oil in the later K’s.

                  #74525
                  Buccaneer
                  Participant

                    US Member

                    Squier, by the looks of all the caked on dirt, I assumed the K-50
                    used a lot of oil. 😆
                    I may get my little electric power washer out tomorrow and see
                    if I can blow some of the grime off.

                    I finished up the magneto today. Not sure why one plug wire
                    points forward, and the other aft, but that’s the only way the
                    wire caps screw on. Hopefully I’ll understand when I put it all
                    back together!
                    It had rubber boots on the old plug wires. I presume it originally
                    had the "fork" type terminal ends??

                    Started cleaning up the flywheel, etc.

                    Made some 14-24 puller bolts today for the old Johnsons. I hate
                    using an irreplaceable rope plate for a puller, so I got the grade 8
                    bolts, cuts the heads off, and threaded them for the flywheel.
                    Hopefully I put them away where I find them for the next job!


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                    #74575
                    squierka39
                    Participant

                      US Member

                      Looking great so far! I always dread working on magnetos. Yours looks ready to go.

                      #74577
                      fisherman6
                      Participant

                        US Member - 2 Years

                        I’m following this thread closely. I have an old clapped out K-50 as well as several other K- Johnsons that I have not yet really worked on. I want to get my decent KA-15 tuned up and ready for a boat ride this year. I probably have almost enough parts to build a couple "Franken-Ks" if I feel like doing that too. I have not been too deep into these yet so I’m learning quite a bit from this thread. It looks like you’re doing a great job, Buc.
                        -Ben

                        OldJohnnyRude on YouTube

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