55 Mark 55

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  • December 28, 2016 at 4:20 pm #5979
    twinrudes
    Participant

      Here’s some pics of this engine I just picked up.
      Questions to follow……
      It’s an album of pics, can’t seem to directly link from prime to here.
      https://www.amazon.com/photos/share/oho … VCJ52m5jOf

      December 28, 2016 at 4:26 pm #49857
      wbeaton
      Participant

        Canada Member

        Nice motor? It looks very clean. I suggest you buy the Mercury factory service manual if you don’t already have it. I’m a big fan of the 35-50 hp 4 cyl Mercs.

        Wayne
        Upper Canada Chapter

        uccaomci.com

        December 28, 2016 at 4:32 pm #49858
        twinrudes
        Participant

          Thats one of my questions actually…
          What’s the best manual for this?
          Thanks,
          John

          December 28, 2016 at 6:34 pm #49862
          wbeaton
          Participant

            Canada Member

            You want the FACTORY service manual for 1965 & prior.

            https://www.amazon.com/Service-Manual-M … B000KEQWYE

            Wayne
            Upper Canada Chapter

            uccaomci.com

            December 28, 2016 at 7:37 pm #49864
            DAVID
            Participant

              US Member

              very clean low usage motor.

              December 28, 2016 at 7:41 pm #49865
              chris-p
              Participant

                Beautiful. Looks original. Great find.

                December 29, 2016 at 4:09 pm #49894
                twinrudes
                Participant

                  Thanks all,
                  I’m in need of some info on this engine….
                  Best manual(s) to get?
                  Anyone try those downloadable ones?
                  What style fuel tank to be period correct am I looking for?
                  Engine says Cedarsburg on the tag, assuming tank and controls should be the same?
                  I know, I know……being a little anally retentive here!!
                  Everting on this Lyman boat, Tee Nee trailer, and now the engine, is stamped 1955, I want to keep it that way.
                  Thanks,
                  John

                  December 29, 2016 at 4:29 pm #49896
                  chinewalker
                  Participant

                    US Member

                    As stated above, spring for the OEM manual, 1965 & Prior, part number C-90-25500.

                    Your "correct" fuel tank – I believe the 1955 6-gallon tanks had a hard-wired hose with no twist-connect fitting on the tank. Pretty sure by 1956 they had the twist-connect feature. Either will function just fine. It should have the shield logo on it, too, not the oval style…

                    December 29, 2016 at 5:49 pm #49900
                    DAVID
                    Participant

                      US Member

                      55 may still have had some duel line tanks converted to single line. like in the pic.

                      Attachments:

                      December 29, 2016 at 8:08 pm #49905
                      opposedtwin
                      Participant

                        US Member

                        John, does the mark 55 have a fuel pump or not? If not, you’ll need to install one or find a pressure tank.

                        An OMC tank can be used with a Mercury fitting.

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