Oil mixture

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  • May 15, 2022 at 9:23 am #259881
    Boonie
    Participant

      Canada Member

      Trying to help my neibour figure out what  oil mixture to use in his McCullough 4hp motor.I’ll be using Quicksilver TC-W3 oil.

      May 15, 2022 at 10:10 am #259883
      seakaye12
      Participant

        US Member

        I think that may be an air cooled powerhead.  It has a wobbler pump in the foot to help cool the midsection/lower but the poowerhead is air cooled.

        That might have been in the era where mfgs were indicating that crazy ratios like 100/1 were OK….but if it were mine I’d run it on 16:1 or maybe 24:1….and use the air-cooled version of 2-stroke oil.

        May 15, 2022 at 10:36 am #259885
        Boonie
        Participant

          Canada Member

          Yes it’s air cooled. So like chainsaw oil?

          May 15, 2022 at 11:23 am #259887
          crosbyman
          Participant

            Canada Member

            yes..           tcw3 is for WATER COOLED  engines

            Joining AOMCI has priviledges 🙂

            May 15, 2022 at 5:53 pm #259899
            Mumbles
            Participant

              I used 16:1 chainsaw/weed eater mix in my 4 horse McCulloch with no problems.  It probably like it!

              May 19, 2022 at 3:35 pm #260107
              Boonie
              Participant

                Canada Member

                On this motor is there a high speed screw and a low speed screw? If so where are they located and what are the settings?
                The carb is  LMB 131 56 stamped on there as well.

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