55 15 hp evinrude

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  • July 7, 2020 at 3:12 pm #207989
    Tinman
    Participant

      US Member

      On the 55 model, is the lower crankshaft seal prone to failure as it is in the 56 models ? My parts book is confusing me because I think there is a change after a certain serial number. I’ll include a pic of the serial number. Thanks.

      Screenshot_20200707-141129_Gallery

      July 7, 2020 at 4:32 pm #207999
      fleetwin
      Participant

        US Member - 2 Years

        Hmmm, thought it was the 56 models that had some issues with a plain seal in the crankcase… I don’t have a 55 parts book so I can’t help much. Does the parts book spell out the differences and which style your engine uses?

        July 7, 2020 at 6:10 pm #208005
        Robert Wight
        Participant

          US Member

          I believe the early 55s used an O-ring seal up to serial number 12000 or 13000 and changed to a lip type oil seal on the motors after that number.

          Bob

          1937 Champion D2C Deluxe Lite Twin
          1954 Johnson CD-11
          1955 Johnson QD-16
          1957 Evinrude Fastwin 18
          1958 Johnson QD-19
          1958 Johnson FD-12
          1959 Johnson QD-20

          “Every 20 minute job is only a broken bolt away from a 3-day project.”
          "Every time you remove a broken or seized bolt an angel gets his wings."

          July 7, 2020 at 6:20 pm #208006
          frankr
          Participant

            US MEMBER PAY BY CHECK

            1955 was a bad year also. Early production just had an o-ring, and I really don’t remember the details on that except it wasn’t good.. There was a mid-year change to the troublesome 303804 that killed so many 1956’s. I’m not sure of the serial number for the change 13,000???

            July 7, 2020 at 6:32 pm #208008
            Robert Wight
            Participant

              US Member

              I finally found my 55 parts list, and the seal change was at serial number 13000 and above.

              Bob

              1937 Champion D2C Deluxe Lite Twin
              1954 Johnson CD-11
              1955 Johnson QD-16
              1957 Evinrude Fastwin 18
              1958 Johnson QD-19
              1958 Johnson FD-12
              1959 Johnson QD-20

              “Every 20 minute job is only a broken bolt away from a 3-day project.”
              "Every time you remove a broken or seized bolt an angel gets his wings."

              July 7, 2020 at 9:23 pm #208026
              Tinman
              Participant

                US Member

                Well my serial number is below the 13000. I’ve changed the seal in my 56 15 hp and my 58 12 hp gale. So is the o ring just as easy to change?

                July 7, 2020 at 9:32 pm #208027
                Robert Wight
                Participant

                  US Member

                  Probably easy enough to swap out the old O-ring for a new one but don’t know if you can swap in the oil seal in it’s place if the oil seal design also involved changing the block casting.

                  Bob

                  1937 Champion D2C Deluxe Lite Twin
                  1954 Johnson CD-11
                  1955 Johnson QD-16
                  1957 Evinrude Fastwin 18
                  1958 Johnson QD-19
                  1958 Johnson FD-12
                  1959 Johnson QD-20

                  “Every 20 minute job is only a broken bolt away from a 3-day project.”
                  "Every time you remove a broken or seized bolt an angel gets his wings."

                  July 7, 2020 at 9:35 pm #208028
                  Tinman
                  Participant

                    US Member

                    If the o ring is there that’s what I’ll put back in. I’m sure your right and the seal won’t replace it. Maybe the o ring was better anyway!! All these changes were not always good ones!

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