1956 5.5 troubles.

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  • August 12, 2023 at 3:22 pm #279115
    frankr
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      I’ll take a wild guess.  Items 49 and 50 are the detent parts on that motor.  Suppose #50 is missing.  That would raise #49 up higher in the gearcase.  Which would mean that “forward” notch in the shift rod would engage with the shift rod pulled up higher.  Which would mean that the dog would be jammed into the forward gear tighter.  Just a guess, as I’ve never experienced it.

       

      shift-detent-1

       

       

       

      August 12, 2023 at 5:04 pm #279121
      fleetwin
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        US Member
        Tinman wrote:

        It does it with the lower unit out or installed   Same results.

        Tinman wrote:

        Replying to lindy46 comment.

        Got it, thanks

        August 12, 2023 at 5:05 pm #279122
        Tinman
        Participant

          Frankr both pieces are there. I actually thought about removing the small piece to see if it made a difference but I know that’s not right. This thing has got me puzzled. It spins freely in neutral. and reverse  It’s free until it engages in both directions but in forward gear you darn near have to  put a screwdriver in the  shear pin hole to move it left and right. It does engage though. I’ve swapped every part in there with another part except the shift rod. I’ve done many of these before and I don’t know what I’m missing here.

          August 12, 2023 at 5:17 pm #279123
          fleetwin
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            US Member

            So everything is more or less original then, correct?  No mismatch between skeg/gearcase hsg (skeg from a different gearcase)?  The prop shaft spins freely in neutral, correct?  How about the driveshaft, does it spin freely in neutral?  The driveshaft spins hard when only in forward gear?  How about if you spin the driveshaft backwards in forward gear (yes, not great for the impeller but am assuming that is coming out again anyway).  The prop shaft spins freely in neutral, so that would seem to rule out the rear prop shaft bushing, and the inner bushing on forward gear.   You replaced the seals, perhaps it is just a tight fit between the rubber seal lips and the shafts?

            Did you try loosening up the impeller housing screws?

            August 12, 2023 at 5:27 pm #279124
            frankr
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              Well rats, I thought I had it with the detent not matching the clutch dog throw theory.  I still think the problem is related to it though.  What happens if you push downward on the shift rod without snapping it out of the detent notch?  Or leave the detent out?  It’s hard to believe anybody could bend the shift rod (?),  I have seen bent shifter forks, but you already tried that.

              Hmmmm, fleetwin suggests a mis matched skeg.  Could it be that?

              August 12, 2023 at 6:46 pm #279132
              Tinman
              Participant

                When  in forward if I push down ever so slightly on the shift rod then the prop shaft starts to spinning freely. Just like it should.

                August 12, 2023 at 7:20 pm #279133
                Tinman
                Participant

                  I have another shift right out of a 58 5 1/2 horse. I may try switching them.

                  August 12, 2023 at 8:58 pm #279134
                  fleetwin
                  Participant

                    US Member

                    OK, well it sounds like the clutch dog is fully engaged to the forward gear, which is a good thing.  Perhaps you don’t have an issue at all.  The only other thing I could think of based on your latest comments is that the clutch dog cradle (#20) is binding in the clutch dog when in forward gear.

                    August 12, 2023 at 9:08 pm #279135
                    Tinman
                    Participant

                      I tried a new one of those also. If I push down slightly on the shift rod( not even a 1/16) it starts to spin freely. And it’s all original. Maybe it’s just the way it is and won’t cause any harm.

                      August 13, 2023 at 1:41 am #279143
                      frankr
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                        You are sure the skeg and gearcase are original matched parts?  Sure sounds like a possible mis-match to me. everything in there is located by the upper gearcase, except the shift fork pivot pin, which is located by the skeg.  I’d be using an inside mike to measure the roundness of the bore, bolted together without the prop shaft parts.

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