1957 Mark 55E Flywheel Nut

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  • May 21, 2021 at 9:13 am #238703
    Spinner
    Participant

      Hello! I am new to the forum and look forward to learning as much as I can about classic outboards. I started a rebuild on a 1957 Mark 55E and it’s going well except the flywheel assy nut is rusted and I am going to have to get creative on removing the nut. I am curious on the nut size as I might have to use a bite bit to back it off. It is so rusted and rounded I am not able get an accurate size and I can’t find any reference to size in the manuals. Thanks in advance for any assistance!

      May 21, 2021 at 9:51 am #238704
      dave-bernard
      Participant

        US Member

        clean well with a pick to get to the bottom then use a 6 point socket they are rounder on top . that is why you need ti clean well to get to the HEX.

        May 21, 2021 at 10:06 am #238706
        Spinner
        Participant

          Thanks! I attached a picture, does this look out of the ordinary?

          May 21, 2021 at 4:48 pm #238732
          dave-bernard
          Participant

            US Member

            the top of the nut has self locking nylock then the Hex below, dig and scrape to see if there is enough hex. cant tell from the pic.

            1 user thanked author for this post.
            Spinner
            May 21, 2021 at 6:32 pm #238735
            frankr
            Participant

              US MEMBER PAY BY CHECK

              Is that why I have a socket with the O.D. ground down? I know I did it for something.

              May 21, 2021 at 10:07 pm #238748
              Spinner
              Participant

                That’s a good idea on reducing the OD of the socket. By heat and force it’s coming off 🙂

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