1961 Evinrude 10 HP Fuel Mix.

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  • September 6, 2017 at 8:00 pm #8148
    george-cantabene
    Participant

      Is this a 50:1 or 24:1 engine?

      Thanks,
      George

      September 6, 2017 at 8:17 pm #64414
      Steve D
      Participant

        Hey George, This is from the 1963 Johnson 10 HP manual and they were still sayng 24:1.

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        September 6, 2017 at 8:32 pm #64415
        jeff-register
        Participant

          US Member

          I ran my 54 Evin on 20/1 for better compression & lubing. Qt of oil in a 5 of gas, then into the 6 gallon. Never had a mess of oil or change of ratio. Just a G.I. can.

          September 6, 2017 at 9:11 pm #64418
          fleetwin
          Participant

            US Member

            George, 24:1 is still the recommended mix even today….Needless to say, mixing heavier can’t hurt anything…..D

            September 6, 2017 at 10:46 pm #64428
            george-cantabene
            Participant

              Thanks for the replies. 24:1 will be the mix.

              September 7, 2017 at 1:29 am #64440
              1957evinrude
              Participant

                US Member

                I agree with the 24:1 I see on the AOMCI on facebook many are running on 50:1 thinking its okay with the new oil. Why risk it ??

                September 7, 2017 at 6:36 am #64450
                westwind
                Participant

                  Canada Member

                  I have a 1973 OMC owners manual and it goes into great detail about using 50:1 with TC-W oil and only using 24:1 with SAE30 if TC-W was unavailable ie Emergency use. A 61 10HP has the updated crank and rods. Besides religious reasons, I don’t see why it would need more oil than 40:1. There are enough people out there wanting to ban 2-strokes, why would we want to give them more reason?

                  September 7, 2017 at 5:50 pm #64482
                  fleetwin
                  Participant

                    US Member

                    Well, I’m sure a 10hp with wrist pin bearings would run fine on 50:1 with good oil. I prefer to adhere to the original recommendation to ensure the engine has a good margin of error for those situations that might result in scuffing/scoring, such as overheating, lousy fuel, lugging, etc. A nice 10hp is not easy to replace. I’m guessing the engine won’t get used much, so the added expense is negligible. When these engines are in good shape, and tuned properly, they rarely smoke, even with 24:1. The extra oil left behind in the crankcase will help minimize internal rusting during long periods of non use as well….

                    September 7, 2017 at 6:38 pm #64485
                    1957evinrude
                    Participant

                      US Member

                      I know I will continue to use the 24:1 mix. Too little oil will kill it. More oil in my opinion won’t hurt it .

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