1965 40HP Evinrude

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  • May 16, 2015 at 5:09 pm #1502
    aziegner
    Participant

      Hi All:
      My good old motor ran great for me last year. New to me … it’s good and strong for an antique. Meantime, late in the season she start loosing power – slipping out of gear. If I came to a complete stop shifted from forward back to neutral it "reset". Could the dog gear be warn? Is this motor an electro-magnetic shift? Is the gear is warn can I attempt to fix it if I have never done it before?

      May 16, 2015 at 5:12 pm #16108
      chris-p
      Participant

        What is your model number?

        May 16, 2015 at 8:17 pm #16133
        aziegner
        Participant

          Model Number Is: 40552m

          May 16, 2015 at 8:47 pm #16135
          chris-p
          Participant

            Ok you have a standard shift gearcase, super quiet casing.

            Is it jumping out of gear, as you go mainly higher RPMS, like hitting a log? If so, clutch dog or adjustment.

            Or is it revving up a bit, losing power and thrust? Could be the prop hub is slipping.

            Will need a few more details to determine what is going on.

            May 16, 2015 at 8:49 pm #16138
            chris-p
            Participant

              http://www.marineengine.com/parts/johns … case+Group

              Here is the parts for the gearcase

              May 16, 2015 at 11:01 pm #16148
              wiscoboater
              Participant

                Yowza!! That’s one expensive dog! 😮

                May 16, 2015 at 11:35 pm #16158
                reivertom
                Participant

                  US Member

                  I have had that happen on a couple motors, and I immediately thought the worst both times. Both times it was only the prop hub slipping. It wouldn’t do it all the time and that’s what was so strange. I finally figured it out and found it mostly happened when I tried to rev the motor faster than normal or if the boat had a bigger than normal load in it.

                  May 17, 2015 at 1:06 am #16161
                  aziegner
                  Participant

                    it skips / slips at any speed. Feels like it jumps in and out of gear. It doesn’t slip long enough to loose thrust per say.

                    May 17, 2015 at 1:13 am #16162
                    aziegner
                    Participant

                      yes, yes loosing thrust. And yes I hit a log last season (as I remember).

                      May 17, 2015 at 3:16 am #16179
                      chris-p
                      Participant

                        Sounds m e like the problem is your prop.

                        Draw a line across the prop and hub with a sharpie marker. Take for a run, until you hear it revvvv. Then re inspect, if the lines are now askew, the hub is spun. You will need a new prop, or get that one re hubbed.

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