Evinrude big twin 35 hp 1957 flywheel nut size

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  • April 17, 2015 at 1:54 am #1234
    twinrudes
    Participant

      Working on this buggered up shaft on my 1957 Evinrude 35 HP Big Twin.
      Anyone know what size the threads are on the crankshaft where the flywheel bolts on?
      I’m thinking 9/16 x 18 NF?

      April 17, 2015 at 12:37 pm #14161
      phil
      Participant

        US Member - 2 Years

        Try your sockets on it till you hit the right one. Oh just noticed you said thread size, you need a vernier caliper and a cheap thread gauge,eh? Of course you could always count an inch of them.

        http://www.omc-boats.org
        http://www.aerocraft-boats.org

        April 17, 2015 at 3:20 pm #14164
        frankr
        Participant

          US Member

          Yes, 9/16-18

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