Home Forum Ask A Member TN-27 Impeller Replacement

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  • #154314
    drifter
    Participant

      I have done dozens and dozens impeller replacements on the mid 50’s/60’s OMC motors. Just began my winter project of refurbishing a TN-27. I will be replacing the impeller and am wondering if there are any tips/techniques to the replacement and pulling the L/U. I’m sure the neutral shift cable must be disconnected but how and where? What is the procedure for pulling the lower unit?
      Thanks for the help.
      Drifter

      #154368
      crosbyman
      Participant

        Canada Member - 2 Years

        http://www.boatinfo.no/lib/johnson/manuals/1922-1964johnson.html#/392

        see page 377 in boatinfo

        http://www.boatinfo.no

        see johnson red book in the Johnson sub-section

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        #154369
        crosbyman
        Participant

          Canada Member - 2 Years

          http://www.boatinfo.no
          page 377 johnson red book
          http://www.boatinfo.no/lib/johnson/manuals/1922-1964johnson.html#/392

          Joining AOMCI has priviledges πŸ™‚

          #154440
          crosbyman
          Participant

            Canada Member - 2 Years

            http://www.boatinfo.no/lib/johnson/manuals/1922-1964johnson.html#/392

            page 377

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            #154461
            lloyd
            Participant

              US Member

              First remove the lower cowl. The shift cable is connected to the bottom of the shift lever mechanism by a set screw. Loosen the set screw and the cable will come down the tube along with the lower unit as it is removed. When replacing the lower unit the cable must be threaded back up the tube and reconnected to the mechanism under slight tension while retightening the set screw. The rest of the procedure is pretty straight forward with a dose of common sense.
              You will probably also need new leather primer seals and instructions for your carburetor. If so, send $10.00 cash and a SASE (self addressed stamped envelope) to me Lloyd Lautner, 9289 North Long Lake Road, Traverse City Michigan, 49685. Price recently increased to 10 bucks as it is getting hard to find the proper oil tanned leather of the right thickness. More good info at: pochefamily.org/outboard. Hope that helps!

              #154535
              bullie
              Participant

                If this is the model I am thinking of its a good idea to drain the LU lube before removing it.

                #154556
                Mumbles
                Participant

                  Let’s see if this PDF attachment works…..

                  Johnson-TN-5-HP-1951-53-Parts-Manual

                  • This reply was modified 5 years, 5 months ago by Mumbles.
                  #154583
                  crosbyman
                  Participant

                    Canada Member - 2 Years

                    procedure is on page 377 in the johnson manual

                    http://boatinfo.no/lib/johnson/manuals/1922-1964johnson.html#/392

                    flip pages

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                    #154630
                    drifter
                    Participant

                      Thanks guys. I have not had time to read through all of the kindly provided information but I am thinking that SAE 80/90 gear oil is correct for the TN L/U?

                      #154807
                      crosbyman
                      Participant

                        Canada Member - 2 Years

                        go to http://www.boatinfo.no see page 377 under by selecting books library Johnson… red book ….. page 377

                        http://boatinfo.no/lib/johnson/manuals/1922-1964johnson.html#/392

                        Joining AOMCI has priviledges πŸ™‚

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