1963 Evinrude Sportwin weird problem

Home › Forum › Ask A Member › 1963 Evinrude Sportwin weird problem

Viewing 10 posts - 1 through 10 (of 23 total)
1 2 3
  • Author
    Posts
  • April 3, 2021 at 4:27 pm #235551
    bfitz241
    Participant

      US Member

      I’ve got a 63 10hp Evinrude. Numbers 10302D E12137. The issue is when I torque the flywheel it breaks the top carbon seal. I’ve ruined 3 of them. It also is catching the points cam UNDER the woodruff key so the points cam won;t turn with the crankshaft. I took the mag plate off, placed the flywheel on and looked at the crankshaft and the woodruff key is just about completely covered.
      Now I know I must be doing something wrong but I have NO IDEA what.
      I have the Johnson service manual 10th ed as a reference.
      I followed the diagram in the manual as far as assembly order of the brass washers, spring and points cam.
      Flywheel number is 580203.
      Any ideas would be appreciated

      April 3, 2021 at 5:14 pm #235560
      Bob Wight
      Participant

        US Member

        Are the support piece and retaining ring in place under the magneto plate?

        Bob

        1937 Champion D2C Deluxe Lite Twin
        1954 Johnson CD-11
        1955 Johnson QD-16
        1957 Evinrude Fastwin 18
        1958 Johnson QD-19
        1958 Johnson FD-12
        1959 Johnson QD-20

        “Every 20 minute job is only a broken bolt away from a 3-day project.”
        "Every time you remove a broken or seized bolt an angel gets his wings."

        April 3, 2021 at 5:38 pm #235563
        fleetwin
        Participant

          US Member

          Is the flywheel taper damaged/cracked allowing the flywheel to come down lower on the crankshaft than it should? Post some pictures of how you are assembling the carbon seal/spring/cam, hopefully it is something simple…Sorry about the damaged carbon seals…
          You mention that the point cam goes below the key, so it more or less spins freely on the crank? Seems like some sort of assembly sequence error…

          April 3, 2021 at 6:10 pm #235569
          bfitz241
          Participant

            US Member
            Bob Wight wrote:

            Are the support piece and retaining ring in place under the magneto plate?

            I’m not up on the actual names, but the aluminum bearing the mag screws into is there as is the brass retaining cover. I’ll look at the manual and verify the names of what I’m talking about.

            Looked it up
            The armature support plate and retaining ring are present and installed

            • This reply was modified 4 years, 1 month ago by bfitz241.
            April 3, 2021 at 6:15 pm #235570
            bfitz241
            Participant

              US Member
              fleetwin wrote:

              Is the flywheel taper damaged/cracked allowing the flywheel to come down lower on the crankshaft than it should? Post some pictures of how you are assembling the carbon seal/spring/cam, hopefully it is something simple…Sorry about the damaged carbon seals…
              You mention that the point cam goes below the key, so it more or less spins freely on the crank? Seems like some sort of assembly sequence error…

              Here’s what I do
              Carbon seal with o ring pressed as far as I can by hand.
              Large brass washer on top of carbon seal lip facing up
              spring, large opening down
              small brass washer lip facing down
              point cam
              flywheel

              April 3, 2021 at 6:21 pm #235571
              bfitz241
              Participant

                US Member

                You mention that the point cam goes below the key, so it more or less spins freely on the crank? Seems like some sort of assembly sequence error

                exactly. it spins on the crank and is captured under the crank key.

                I’m starting to think I’m putting the crank key in wrong.

                I try to keep the lower part of the key even with the crank surface and the upper part out to engage the flywheel taper.

                Thanks for the help. I’m at a loss. The spring and whatnot is throwing me. Never dealt with that before. I’ve had success with a 7.5 and 18 but this is different.

                I’ll get pictures next week

                • This reply was modified 4 years, 1 month ago by bfitz241.
                April 3, 2021 at 6:32 pm #235574
                crosbyman
                Participant

                  Canada Member

                  so you have all these parts in place…

                  Joining AOMCI has priviledges 🙂

                  April 3, 2021 at 6:34 pm #235577
                  bfitz241
                  Participant

                    US Member

                    yes. followed the manual pg 267 if that helps.
                    Could it be the wrong key? I’m just thinking out loud. I reused all the parts that were there.
                    Just saw your attachment photo.
                    Everything highlighted is there and in that order

                    • This reply was modified 4 years, 1 month ago by bfitz241.
                    April 4, 2021 at 7:46 am #235599
                    fleetwin
                    Participant

                      US Member

                      could be the wrong key….The correct key fits tightly into the crank and fills the entire opening. I’m sure that the way you align the key matters also. I’m pretty sure the key must be paralell to the crankshaft taper as well. If the key is vertical, that might explain why it is not securing the cam…

                      April 4, 2021 at 8:06 am #235601
                      frankr
                      Participant

                        US MEMBER PAY BY CHECK
                        fleetwin wrote:

                        Is the flywheel taper damaged/cracked allowing the flywheel to come down lower on the crankshaft than it should? Post some pictures of how you are assembling the carbon seal/spring/cam, hopefully it is something simple…Sorry about the damaged carbon seals…
                        You mention that the point cam goes below the key, so it more or less spins freely on the crank? Seems like some sort of assembly sequence error…

                        I think the answer was in this post. I think the flywheel taper is spread, allowing the flywheel to push the cam below the key, and mashing down on the carbon seal, thus breaking it. I’ve seen it happen before.

                        So what damaged the flywheel??? More than likely somebody in the past has tightened it with an impact wrench. There is a reason it must be tightened with a torque wrench. Another thing I’ve seen in the past is somebody greased the tapers, making them slippery and move downward too far. Again, there is a reason the tapers must be clean and dry.

                        Whatever the case, the flywheel is destroyed and must be replaced.

                      • Author
                        Posts
                      Viewing 10 posts - 1 through 10 (of 23 total)
                      1 2 3
                      • You must be logged in to reply to this topic.