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1956 Johnson fd-10 lower unit

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  • 1956 Johnson fd-10 lower unit

    I am working on my friends fd-10 long shaft but at some point it was changed to a short shaft evinrude lower unit. My problem is I need a lower unit seal kit. Will the kit for an fd-11 fit.
    1939 Sea King 3 hp
    1947 Sea King 3 hp
    2-1948 Johnson td-20 5 hp
    1954 Evinrude Fleetwin 7.5 hp
    1955 Evinrude Fastwin 15 hp
    1958 Johnson 18 hp
    1964 Mercury 110 9.8 hp
    1965 Sea King 6 hp
    1970 eska sportfisher 3.5 hp


  • #2
    Re: 1956 Johnson fd-10 lower unit

    It depends on the serial number. There was a mid year change in '57, prop shaft seal is a different size on the later '57's, they use the same seal as the '58 to 70s 18hp. So if the kit is for a '57 with serial number 7000 and down, it will work. If it is the seal kit for a '57 serial number 7000 and up, wont work. Actually the prop shaft seal will be the only different item, the rest will work.
    Chris

    Top Secret Files:

    http://forums.iboats.com/showthread.php?t=299680

    Comment



    • #3
      Re: 1956 Johnson fd-10 lower unit

      You can go to ***************** and look up the parts and compare them, most likely they will use the same seal kit.

      Comment



      • #4
        Re: 1956 Johnson fd-10 lower unit

        Thanks guys. It happens that I only need the prop shaft seal but want a full kit. I will check the diagrams on marine engine but I'm not sure what year the lower unit is off of because it's not original.
        1939 Sea King 3 hp
        1947 Sea King 3 hp
        2-1948 Johnson td-20 5 hp
        1954 Evinrude Fleetwin 7.5 hp
        1955 Evinrude Fastwin 15 hp
        1958 Johnson 18 hp
        1964 Mercury 110 9.8 hp
        1965 Sea King 6 hp
        1970 eska sportfisher 3.5 hp

        Comment



        • #5
          Re: 1956 Johnson fd-10 lower unit

          Ok then open her up.

          The earlier prop shaft seals will have a 0.625" Bore, 1.254"OD, 0.313" Width, Part number 302495

          The later prop shaft seals will have a 0.625" Bore, 1.128"OD, 0.25" Width, Part number 313284

          I can guarantee that they dont all use the same seal kit.
          Chris

          Top Secret Files:

          http://forums.iboats.com/showthread.php?t=299680

          Comment



          • #6
            Re: 1956 Johnson fd-10 lower unit

            Ok dumb question but how do I get that seal out of the bushing assembly thing
            1939 Sea King 3 hp
            1947 Sea King 3 hp
            2-1948 Johnson td-20 5 hp
            1954 Evinrude Fleetwin 7.5 hp
            1955 Evinrude Fastwin 15 hp
            1958 Johnson 18 hp
            1964 Mercury 110 9.8 hp
            1965 Sea King 6 hp
            1970 eska sportfisher 3.5 hp

            Comment



            • #7
              Re: 1956 Johnson fd-10 lower unit

              Originally posted by HighTrim View Post
              Ok then open her up.

              The earlier prop shaft seals will have a 0.625" Bore, 1.254"OD, 0.313" Width, Part number 302495

              The later prop shaft seals will have a 0.625" Bore, 1.128"OD, 0.25" Width, Part number 313284

              I can guarantee that they dont all use the same seal kit.
              Are you sure about that!


              Despite the cost of Living, It's still a popular thing

              1973 Starcraft 21 mariner that's no longer for sale & Lone Star-Medallion-II-1966-oh-scrap
              & 1963 14' Lone Star Big Fisherman Repairs

              Comment



              • #8
                Re: 1956 Johnson fd-10 lower unit

                Very carefully. It's easy to ruin the prop head. Take your time, don't expect it to be easy. But it will come out. You can get a seal puller at Harbor freight
                http://www.harborfreight.com/catalog...?q=seal+puller
                Some people punch or drill a small hole, put a screw into the hole a few turns and pry out with a hammer. Careful with that prop head that the seal goes in, it's just aluminum and easily damaged. Once you get some of the seal out, sometimes a visegrip can finish the job. Did I mention to be careful with that prop head?
                Originally posted by codykoke View Post
                Ok dumb question but how do I get that seal out of the bushing assembly thing
                Current Engines:
                '56 30hp Bigtwin
                '57 18hp Fastwin
                '56 7.5hp Fleetwin
                '54 10hp Johnson
                '54 7.5hp Fleetwin

                Comment



                • #9
                  Re: 1956 Johnson fd-10 lower unit

                  Originally posted by 64osby View Post
                  Are you sure about that!
                  Funny
                  Current Engines:
                  '56 30hp Bigtwin
                  '57 18hp Fastwin
                  '56 7.5hp Fleetwin
                  '54 10hp Johnson
                  '54 7.5hp Fleetwin

                  Comment



                  • #10
                    Re: 1956 Johnson fd-10 lower unit

                    Originally posted by 64osby View Post
                    Are you sure about that!
                    I can guarantee it, what do you think?
                    Chris

                    Top Secret Files:

                    http://forums.iboats.com/showthread.php?t=299680

                    Comment



                    • #11
                      Re: 1956 Johnson fd-10 lower unit

                      Today I was looking over the lower unit and found there is some up and down and around play on the prop shaft. Will a new prop shaft seal fix this or?
                      1939 Sea King 3 hp
                      1947 Sea King 3 hp
                      2-1948 Johnson td-20 5 hp
                      1954 Evinrude Fleetwin 7.5 hp
                      1955 Evinrude Fastwin 15 hp
                      1958 Johnson 18 hp
                      1964 Mercury 110 9.8 hp
                      1965 Sea King 6 hp
                      1970 eska sportfisher 3.5 hp

                      Comment



                      • #12
                        Re: 1956 Johnson fd-10 lower unit

                        The best way to remove the seal:

                        Take an 8d nail and grind the tip off to where the tip is flat. Set the prop seal housing over a socket that is slightly larger than the seal. Tap the seal out by driving the nail through the small holes on the outside of the seal housing.

                        If you have up and down play, then something in there is severely worn.
                        sigpicVice Admiral Zephyr

                        1941 Johnson HD-20 (in restoration)
                        1947 Sea King 5hp
                        1948 Evinrude Sportsman
                        1949 Martin "40"
                        1951 Evinrude Fastwin
                        1954 Evinrude Fleetwin
                        1955 Evinrude Fleetwin
                        1955 Johnson JW-11
                        1955 Johnson CD-12 (2)
                        1955 Johnson QD-16
                        1955 Johnson RD-17
                        1957 Jhnson CD-14
                        1957 Evinrude Big Twin
                        1958 Evinrude Fisherman
                        1958 Johnson FDE-12
                        1959 Johnson RDSL-21B
                        1974 Tanaka 1hp (screamin' drink mixer )

                        Comment



                        • #13
                          Re: 1956 Johnson fd-10 lower unit

                          Okay so I opened it up and the brass bushing has grooves in it as well as the prop shaft. Really pisses me off cuz the owner has a 150 dollar limit and I'm already there in parts. I was told it was a rebuilt lower unit but that's not the case. What would you guys do?
                          1939 Sea King 3 hp
                          1947 Sea King 3 hp
                          2-1948 Johnson td-20 5 hp
                          1954 Evinrude Fleetwin 7.5 hp
                          1955 Evinrude Fastwin 15 hp
                          1958 Johnson 18 hp
                          1964 Mercury 110 9.8 hp
                          1965 Sea King 6 hp
                          1970 eska sportfisher 3.5 hp

                          Comment



                          • #14
                            Re: 1956 Johnson fd-10 lower unit

                            After another look the side of the prop head that faces the prop is out of round. This piece looks like it is stainless not aluminum and possibly part of the seal, is the prop shaft seal rubber and metal or just rubber? Also zephyr the only hole in the thing is for the pin the line up with the lower unit side.
                            1939 Sea King 3 hp
                            1947 Sea King 3 hp
                            2-1948 Johnson td-20 5 hp
                            1954 Evinrude Fleetwin 7.5 hp
                            1955 Evinrude Fastwin 15 hp
                            1958 Johnson 18 hp
                            1964 Mercury 110 9.8 hp
                            1965 Sea King 6 hp
                            1970 eska sportfisher 3.5 hp

                            Comment



                            • #15
                              Re: 1956 Johnson fd-10 lower unit

                              Originally posted by HighTrim View Post
                              I can guarantee it, what do you think?
                              We'll see, if I ever see that other seal, it will be proof.


                              Despite the cost of Living, It's still a popular thing

                              1973 Starcraft 21 mariner that's no longer for sale & Lone Star-Medallion-II-1966-oh-scrap
                              & 1963 14' Lone Star Big Fisherman Repairs

                              Comment


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