Home Forum Ask A Member McCullough 10 Scott

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  • #4753
    smokeonthewater
    Participant

      Good afternoon gentlemen,
      I recently agreed to LOOK at my neighbors’ "McCullough Scott 10 " motor.
      As luck would have it, this is the only legible thing on the motor…. 3 mystery knobs ….. And no spark…
      The thing looks like something left over from an Apollo space mission and is white in color…
      Without any pictures, might anyone have any guesses to a model number or where a manual might be found …. I’m curious if this motor had a reputation, as I’ve been unsuccessful in finding any information about mccullough motors in the 10 hp range
      Thanks in advance!

      #40215
      retiredoz
      Participant

        McCullough did produce a 10-hp in ’58 and ’59. 1960 was the first and only year for the 12-hp, followed by 14-hp motors. Typical cure for a ‘no-spark’ condition is to pull the flywheel, and clean and regap the points.

        #40224
        baron0418
        Participant

          True story retiredoz, Assuming the coils are ok ( Fairly likely.) and the condensers are too. (Not very likely.)Bail-a-matic models are a problem Brian

          #40259
          smokeonthewater
          Participant

            Good info Gents,
            Would anyone know what the condenser values might be ?

            #40264
            Tom
            Participant

              US Member

              If the condensers on the motor are the old style upright can WICOs, they are tough to find, and you’ll be better off just replacing them with something else. The value isn’t that critical, as long as you use something from an outboard made after WWII. If you really want to go modern, search Cornell Dubilier Orange Drop 716P10456L (600V / 5%) or 716P10496L (600V / 10%) for a 0.1 uf capacitor that should work well. It has to be the 716 series, and has to be 400V or 600V rated. If you want 0.15 uF, the number is 716P154xy, where xy is 56 or 96.

              Be sure the bracket that holds the tiller handle is not cracked. That is a weak spot on these motors. People try to tilt the motor by pushing down on the tiller. Nearly impossible to repair well without welding.

              Also, be sure the rubber bushing in the propeller is in good shape, if it has that type of prop.

              I can’t remember whether there was a 10 hp motor made with the straight leg configuration. If the leg is curved, the pump is just below the powerhead. These are somewhat problematic in that you have to drop the leg to get to them. Then you have to get the shift mechanism out of the way to access the pumps. The roll pins are challenging. If the leg is straight, the pumps are just above the foot, they are easier to obtain, and easier to change.

              I’ve owned a bunch of these, and they always wind out when you start them cold. Be ready to crank down the throttle when it starts.

              Good luck,

              Tom

              #40356
              smokeonthewater
              Participant

                Thanks, Tom …
                This information really helps!
                The motor here looks really solid…. Handle and all…
                Thanks again!

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