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Mercruiser Alpha One steering yoke removal

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    Mercruiser Alpha One steering yoke removal

    "Steering yoke" is my name - maybe there's an official name. I'm referring to the casting that the tilt cylinders mount to the bottom of and which holds the gimbal housing. My service manual is silent about how to remove this and I'm stumped. Somewhere I found advice to cut access holes in the side of the transom casting which I've done but my guts look enough different from what I found online that I've temporarily stopped. It appears to me that the yoke needs to move forward enough to slip past the ears on the bottom of the transom mounted casting. What am I missing?
    Last edited by ksanders; 12-14-2017, 04:44 PM.
    R.J.(Bob) Evans
    Buchanan, SK
    Cierra 2755
    Previously 43 Defever, Response LX
    Various runabouts, canoes & kayaks

    #2
    Problem resolved. I found another Youtube that more clearly showed what a fustercluck that steering arm is to remove and I'm not going there. Mother Evans raised tall kids, not stupid ones. So now I've got a couple of access holes newly drilled that will get plugged and I just spent the last two hours standing on my head with every 7/16 wrench I own deployed. The object of my attention was that miserable little 1/4" bolt that holds the split rubber on the trim sender wires. I got the bottom one with no trouble but I was convinced I needed to remove the steering yoke to get at the top one. Engineers and lawyers - every problem known to man can be traced to either a lawyer or an engineer. It could have been worse. I used to have an awesome mechanic who was fond of creating custom wrenches. Curiously enough it was always a company wrench that got ground, heated, bent or (usually) all of the above. I didn't have to customize any wrenches so I guess it could have been worse but I haven't got it reassembled yet either.
    R.J.(Bob) Evans
    Buchanan, SK
    Cierra 2755
    Previously 43 Defever, Response LX
    Various runabouts, canoes & kayaks

    Comment


      #3
      whatever you are doing, that upper square shaft does not need to be removed most likely...
      Joon, Kathy, Jaden & Tristan
      Uniflite 42 AC, DD 671N
      93 3058 sold
      92 2855 (day boat)
      91 Fourwinns 205 (lake boat)
      Longbranch WA
      Life is Good

      Comment


        #4
        Originally posted by Ruffryder View Post
        whatever you are doing, that upper square shaft does not need to be removed most likely...
        My only concern now is how much wear there is in the top of that yoke affair. I'm done for the day but tomorrow I'm going to torque everything up and assess the situation. I may still end up taking it apart.
        R.J.(Bob) Evans
        Buchanan, SK
        Cierra 2755
        Previously 43 Defever, Response LX
        Various runabouts, canoes & kayaks

        Comment


          #5
          Bob
          The part giving you headaches is called a gymbal ring. On early Mercruiser Alpha drives the top joint was splined and the spines would eventually fail. This would cause a complete loss of steering.The later design replaced the spline with a large square that mated with the assembly at the top. To remove this ring there is a large pin at the bottom that has a slot in it for removal. The two holes you made at the top allow getting to the nut that has to be removed at the top.
          If you don’t have play in this gymbal ring there is no reason to remove it. When you buy the new replacement it comes with plastic plugs that thread into the two holes you made. You will need a very large tap to thread these holes. The whole job is ugly but doable. A Mercruiser manual is very helpful.
          Gibraltar, Mi.
          1986- 3870- Hino 175's
          1988 26' Shamrock/ Diesel
          14' Zodiac Bay Runner

          Comment


            #6
            Yes those Pre-Alpha drives made from 1976 - 1982 had spline to square shaft, your 1983 - 1990 will have a SQ to SQ upper shaft...
            Mercruiser's drilling 2 holes method would be much more difficult than JR marine

            Joon, Kathy, Jaden & Tristan
            Uniflite 42 AC, DD 671N
            93 3058 sold
            92 2855 (day boat)
            91 Fourwinns 205 (lake boat)
            Longbranch WA
            Life is Good

            Comment


              #7
              Bob, what is it that needs repair/replacement? Trim limit switch?
              Dave
              Edmonds, WA
              "THE FIX"
              '93 2556
              Carbureted 383 Vortec-Bravo II 2.0:1 18 1/4x19 P

              The rebuild of my 2556 https://www.baylinerownersclub.org/f...76?view=thread
              Misc. projects thread
              https://www.baylinerownersclub.org/f...56-gctid789773

              Comment


                #8
                Originally posted by builderdude View Post
                Bob, what is it that needs repair/replacement? Trim limit switch?
                What kicked this off was getting access to the top bolt on the plate that holds the split rubbers on the trim sender wires. Now I'm a little worried about how much play there is between the gimbal ring and that square shaft. I think its probably OK but I need to torque it up and check it tomorrow.
                R.J.(Bob) Evans
                Buchanan, SK
                Cierra 2755
                Previously 43 Defever, Response LX
                Various runabouts, canoes & kayaks

                Comment


                  #9
                  Originally posted by Ruffryder View Post
                  Mercruiser's drilling 2 holes method would be much more difficult than JR marine
                  Unfortunately it appears that isn't an option on my Alpha One Gen I drive.
                  R.J.(Bob) Evans
                  Buchanan, SK
                  Cierra 2755
                  Previously 43 Defever, Response LX
                  Various runabouts, canoes & kayaks

                  Comment


                    #10
                    just have to come up with your own kit like I did to mine...
                    Joon, Kathy, Jaden & Tristan
                    Uniflite 42 AC, DD 671N
                    93 3058 sold
                    92 2855 (day boat)
                    91 Fourwinns 205 (lake boat)
                    Longbranch WA
                    Life is Good

                    Comment

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