Home Forum Ask A Member 1936 Johnson J-80 driveshaft

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  • #3386
    Buccaneer
    Participant

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

      Does anyone have a digital parts manual for the subject motor?
      It has a two piece drive shaft with a tapered, brass "slip clutch"
      affair that fits in a hub that drives the lower shaft.
      I got the brass slip clutch out, but can’t get the drive shaft out
      of the hub, even though the shaft turns within the hub.
      Not sure if I’m missing something or if the end of the drive shaft
      is mushroomed, not letting the shaft pull out.
      I want to take it all apart, sandblast the rust and crud out, etc.
      Regarding the photos, #2, The brass cone / clutch is pinned to
      the driveshaft with an 1/8" pin. The larger pin goes in the
      coupling just below the drive shaft end, presumably to
      keep the drive shaft from dropping down.
      The end of the coupling has splines which attach to
      the lower drive shaft in the first photo.
      Could the coupling possibly be forged or crimped to the
      drive shaft and still allow the drive shaft to turn inside?
      Thanks!


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      #30125
      Mumbles
      Participant

        Yours looks the same as my F 70 system which came all apart. The splines or pin holes may be mushroomed a bit causing some interference. I’m sure I had an exploded view but I can’t seem to find it now.

        #30130
        Buccaneer
        Participant

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

          Thanks for the reply Mumbles. I tried to drill the end
          of the drive shaft (in the lathe) that’s in the hub, in case it’s
          mushroomed a little, but the drill bit didn’t touch it…..
          must be hard as heck. The big pin doesn’t go thru the
          drive shaft, and the little pin just holds the brass cone
          that’s free and clear. Perhaps tomorrow I’ll get the
          torch out!

          Prepare to be boarded!

          #30131
          kevinf
          Participant

            The J-65 had a shock absorber as well. It’s covered in the shop manual if that’s any help?
            http://www.austinsailor.net/manuals/20-johnson/ejs.html

            #30135
            Buccaneer
            Participant

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

              Thanks Kevin – that manual is talking about "spring retainers"
              on the drive shafts. Don’t believe I have any, but will
              double check tomorrow. Thanks!

              Prepare to be boarded!

              #30164
              Buccaneer
              Participant

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

                I finally got the drive shaft out of the shock absorber / slip clutch
                today. I couldn’t tell that the shock absorber housing was in
                two parts. The "shock drive hub" goes inside the "shock housing"
                and is pinned. The heat and pee oil from the prior day must
                have worked it’s magic as I started seeing evidence that
                "just maybe" it was two pieces!
                Anyway, all apart, cleaned, painted and re-assembled.
                Hopefully the photo will help the next clueless fellow.


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