24:1 vs 50:1 in 64′ vs 65′ OMC engines

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  • August 15, 2018 at 9:21 pm #81240
    Steve D
    Participant

      It’s unreasonable…and illogical…but I just don’t feel comfortable using 50:1 until maybe the late 60s early 70s. So sue me. 😎

      August 15, 2018 at 9:48 pm #81243
      jcrigan
      Participant

        Back when I was a little kid it seemed like everybody saved their used crankcase oil for their 2 stroke motors. Chainsaws, boat motors, lawnmowers, etc. They would filter it through an oid sock first.

        August 15, 2018 at 10:35 pm #81246
        vtfireman85
        Participant

          im on the fence here, about the whole thing. i am a huge fan of following manufacturers instructions, but when the instructions seem conflictory i dont know what to do.
          ill be absolutely blunt about my objections to the 24:1 however, i take this thing to a lake where it is as pristine as can be in the water, its so clean and so clear, largely because the people there strive to keep it that way and i get lots of flack when for 2 weeks im there there is a huge oil slick at the dock. my 50:1 18 HP doesn’t do that, i am thinking about switching to synthetic, and i want to try the biodegradable. but if the short answer was they simply didn’t need them and it took till 65 to figure it out, id go to say…40:1 i never did feel comfortable with an old motor without a little extra lube.

          August 15, 2018 at 10:47 pm #81248
          Steve D
          Participant

            You should be fine with 50:1 on a 60s 18 HP, especially if you’re hearing it from neighbors on a pristine lake. It’s just my personal preference to run 24:1 on my motors. And my personal experience with Synthetic is that it does help with less of an oil slick.

            August 15, 2018 at 10:56 pm #81249
            chris-p
            Participant

              You have to remember, they had to pick a year, so ’64 it was. Is there a difference between some ’63 and’64 motors? Well no.

              Be educated about each PARTICULAR motor and run what is best based on that. I don’t own shares in BRP, but I am a big fan of their XD line of oil. Find they smoke very little, and leave almost no oil trail on the water.

              Of course, it is up to us to ensure are motors are in good tune and not dumping excess oil.

              August 16, 2018 at 6:11 am #81276
              garry-in-michigan
              Participant

                Lifetime Member

                OMC was necessarily cautious because some of the early "Super Synthetics" were not what they were cracked up to be. Dad made Lenard oil of Michigan an Evinrude distributor when they had to replace over 4000 outboards under there oil warrintee when they found there revolutionary synthetic 50 to 1 outboard special turned to super glue when mixed with a certain blend of Wisconsin gasoline. OMC did extensive testing before coming out with there own brand in ’65 . . . 😆

                August 16, 2018 at 11:13 am #81278
                Randy in Tampa
                Participant

                  never heard of anyone killing a motor by putting to much oil but I have heard it for not enough 😉

                  August 16, 2018 at 8:23 pm #81320
                  rook49
                  Participant

                    My ’66 Model Johnson 3 hp has been running on a 50:1 mix since I inherited it from my uncle back in ’84. I figured the people that designed and built the motor knew more than the guy on the street which is why they put a label on the front of the motor that called for 50:1. When all else fails…read the directions.

                    August 16, 2018 at 9:08 pm #81324
                    wbeaton
                    Participant

                      Canada Member - 2 Years

                      Personally, I think more energy should be spent discussing oil quality and less about mix ratios. I only use quality oil. Usually BRP in the large (10L?) container or Amsoil if I can get it. The BRP oil is $100 CAD per jug and worth every penny. Even at 12:1 it barely smokes. The cheap oil leaves a mess everywhere. On the water, in the air and on the motor. When I see all the unburnt gunk from the cheap oil I have to wonder why people buy it.

                      Wayne
                      Upper Canada Chapter

                      uccaomci.com

                      August 17, 2018 at 1:15 am #81342
                      vtfireman85
                      Participant
                        quote wbeaton:

                        Personally, I think more energy should be spent discussing oil quality and less about mix ratios. I only use quality oil. Usually BRP in the large (10L?) container or Amsoil if I can get it. The BRP oil is $100 CAD per jug and worth every penny. Even at 12:1 it barely smokes. The cheap oil leaves a mess everywhere. On the water, in the air and on the motor. When I see all the unburnt gunk from the cheap oil I have to wonder why people buy it.

                        Is the BRP oil synthetic?

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