1957 Hiawatha 3.6 HP

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  • June 24, 2015 at 8:50 pm #1854
    marvk
    Participant

      I was wondering if anyone had a Hiawatha / Scott Atwater 3.6 HP built in the late1950s? I was wondering how they are supposed to sound and run. I got mine from a neighbor at the lake who bought a cottage and it was sitting in the basement for over 30 years.

      When I got it, all I did was to inspect and clean the points and reset them, and replace the cap for the gas tank which was stripped. I also replaced the impeller or wobbler as this one has.

      It seems to run pretty well, but the carburetor is pretty touchy as far as settings go, it took some research to find that the low speed idle is backwards from the normal OMC. Meaning, that the low speed adjusts the air flow, not the fuel flow. Once I understood that, actually idles really well.

      The fuel tank had a leak in it where the mounting studs are soldered or welded onto the tank, but once I sealed that up it seems to have taken care of that.

      Anyways, here’s the link to a video I made this afternoon, was wondering if I needed to do any extra tweaking or adjustments to it? 🙂

      https://youtu.be/_BPMgJDhVvc

      June 24, 2015 at 9:03 pm #18844
      ken-w
      Participant

        US Member - 1 Year (includes $3 online payment fee)

        Yep sounds right. What’s the model number, it will give you the year?

        June 24, 2015 at 9:16 pm #18846
        frankr
        Participant

          US Member - 1 Year (includes $3 online payment fee)

          Sounds beautiful. Mine is a ’47. But they made those things for many years. And lots of them.

          June 24, 2015 at 9:40 pm #18848
          marvk
          Participant

            Model# is 75-OM3-25-7960B. Serial# 40751685. My wife hates it, but I think it’s pretty cool. Bottom line, I win! 😆 I do have the lower shroud for it, but I wanted to check for the leak first. I think it’s good to go.

            June 25, 2015 at 11:02 am #18891
            ken-w
            Participant

              US Member - 1 Year (includes $3 online payment fee)

              You have a 1957 model year, the first two digits flipped is the year, OM3 signifies that it was built by Scott. Also the serial number 4075, 40 is Scott model for the 3.6hp Hiawatha and 75 flipped is the year.

              June 25, 2015 at 12:32 pm #18893
              marvk
              Participant

                Thanks Ken. 🙂

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