’58 Fastwin 18 vs ’93 Merc 20 weights

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  • December 3, 2016 at 2:44 pm #5817
    wetwillie
    Participant

      In the interest of speed and reliability, I am considering replacing the old 18 on my little FC Runabout with a newer Merc 20 but am concerned about the increase in weight. I expected the newer motor to be lighter but at 112 lbs, I now think it’s got to be heavier. Can someone respond with the weight of the 18?
      Thanks!

      December 3, 2016 at 5:15 pm #48462
      phil-b
      Participant

        1957 catalog says 80 (87 for the electric start). The number I would have given from the top of my head was 77:

        https://web.archive.org/web/20051215140 … _30_31.jpg

        December 4, 2016 at 1:14 am #48481
        wetwillie
        Participant

          Thanks Phil. I’m surprised that such an old motor would be so much lighter than one 35 yrs newer of about the same hp.
          Would anyone like to respond with their opinion of why a newer motor is so much heavier?

          December 4, 2016 at 1:21 am #48482
          david-bartlett
          Participant

            Willie,

            I find the gear case components are larger thus heavier. Also transom clamp area is stronger on newer motors. Not to mention extra safety stuff to prevent in gear starting. It adds up quickly.

            December 4, 2016 at 1:54 am #48484
            wetwillie
            Participant

              Thanks Dave. I guess it really does add up quickly. Very interesting. Now to decide if the additional hp is worth the additional weight. I figure there’d be more than a 2 hp difference between the 2 motors because of the difference in how the power was measured. I wonder what hp the 18 would be if measured the same way as the ’93. Hmmmm

              December 4, 2016 at 2:02 am #48485
              dave-bernard
              Participant

                US Member

                get a mark 25 you will see a difference.

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