1975 Mercury 650 lower unit assembly

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  • May 31, 2015 at 8:20 pm #17302
    dave-bernard
    Participant

      US Member

      Yes it is it is preloaded with the spring and follower.

      June 1, 2015 at 12:26 am #17317
      hag
      Participant

        Yes I kinda thought so but same time not putting any shims in was wondering it it was too tight on the shifter rod. But if it was too tight on the shifter rod it would not be so smooth spinning on the drive shaft/pinion gear. So I think I’m good.

        June 1, 2015 at 9:24 am #17337
        billw
        Participant

          US Member

          So you were Merc-a-fied. That’s why I almost never try to swap parts around on Mercurys. They made so many tiny, seemingly insignificant changes that it’s just not worth my aggravation. Sounds like you found another one.

          Long live American manufacturing!

          June 1, 2015 at 9:28 am #17338
          hag
          Participant

            Yup. I ordered the part number based on the carrier. I guess same carrier used in different motors with different reverse gears. I mean a very slight difference in the gears. Oh well live and learn.

            August 19, 2015 at 5:29 pm #22340
            hag
            Participant

              Update:
              finally got it in the water and worked great up until last day of use up north in Canada. Lost reverse and oil leak (this occurred after I rescued a novice who flipped his canoe in the middle of the lake- good deeds!)

              I guessed the circular nut holding bearing carrier had slipped and when I got it off I was right.
              The problem I think is that the prior owner/ repair man strip the threads on the housing itself. Also I had bought new nut but was made of a hard plastic compound.
              I just ordered new Oem nut and a nut holder tab too.

              Question is how to better reinforce or secure the nut to the housing after tightening it and folding down the tabs given the threads are worn and stripped on the housing. Epoxy/jb weld/lock tight?

              August 19, 2015 at 6:48 pm #22342
              dave-bernard
              Participant

                US Member

                drill and pin it from the side. drill all the way thru the nut and use a roll pin that way when you need to remove it just tap it on thru. just a thought I have not had to do it yet.

                August 20, 2015 at 6:03 am #22392
                hag
                Participant

                  I was thinking about that too. Thinking 2 small screw on opposite sides. Unscrew it if need to remove it.

                  What do you mean by roll pin?

                  August 20, 2015 at 1:14 pm #22396
                  dave-bernard
                  Participant

                    US Member

                    split pin if that helps. if you use screws use allen so nothing sticks out and use loctite.

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