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Oil + Gas Mixture 25 Horse Johnson

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  • Oil + Gas Mixture 25 Horse Johnson

    I have a 1976 25 horse Johnson, and am wondering about the oil mixture. I would like to use AMS Oil Marine 100:1. Is that safe? Or I could mix it at a ratio of 80:1 as well? Just wondering, any help would be great!

  • #2
    Re: Oil + Gas Mixture 25 Horse Johnson

    I do not know what AMS is, but I would not run anything other than TCW-#3 at 50:1.

    Mas
    "New" '57 Lark Chapter One...the Find:
    http://forums.iboats.com/showthread.php?t=370037

    "New" '57 Lark Chapter Two...the Initial Breakdown:
    http://forums.iboats.com/showthread.php?t=370666

    "New" '57 Lark Chapter Three...the Gearcase:
    http://forums.iboats.com/showthread.php?t=370904

    "New" '57 Lark Chapter Four...the NOS Powerhead:
    http://forums.iboats.com/showthread.php?t=456868

    "New" '57 Lark Chapter Five...Repainting:
    http://forums.iboats.com/showthread.php?t=523546

    Comment


    • #3
      Re: Oil + Gas Mixture 25 Horse Johnson

      Originally posted by Mas View Post
      I do not know what AMS is, but I would not run anything other than TCW-#3 at 50:1.

      Mas
      That makes two of us.
      sigpic

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      • #4
        Re: Oil + Gas Mixture 25 Horse Johnson

        AMS oil is a brand, it is recommended for tcw3 and api-tc applications. It is a outboard oil. The bottle says that it prevents wear and rust at lean mix ratios. It says that 80:1 is ok as well as 100:1. It comes in an easy to use bottle that is 8 oz. Any other thoughts? Thanks!

        Comment


        • #5
          Re: Oil + Gas Mixture 25 Horse Johnson

          I believe he means Amsoil Sabre Synthetic 2-Cycle Oil.

          Comment


          • #6
            Re: Oil + Gas Mixture 25 Horse Johnson

            Not saying there isn't some "wonder oil" out there, just not in my outboard.

            If it aint broke, don't fix it. For me, TCW-3 @ 50:1

            Oil is pretty cheap, fixing 'em isn't.


            Mas
            "New" '57 Lark Chapter One...the Find:
            http://forums.iboats.com/showthread.php?t=370037

            "New" '57 Lark Chapter Two...the Initial Breakdown:
            http://forums.iboats.com/showthread.php?t=370666

            "New" '57 Lark Chapter Three...the Gearcase:
            http://forums.iboats.com/showthread.php?t=370904

            "New" '57 Lark Chapter Four...the NOS Powerhead:
            http://forums.iboats.com/showthread.php?t=456868

            "New" '57 Lark Chapter Five...Repainting:
            http://forums.iboats.com/showthread.php?t=523546

            Comment


            • #7
              Re: Oil + Gas Mixture 25 Horse Johnson

              Mas is right. TCW-3 at 50:1!! err on the side of caution. 100:1 is never enough no matter what the label says.

              Comment


              • #8
                Re: Oil + Gas Mixture 25 Horse Johnson

                Originally posted by kfa4303 View Post
                Mas is right. TCW-3 at 50:1!! err on the side of caution. 100:1 is never enough no matter what the label says.
                definately right!
                Temple Bar Marina, Lake Mead, AZ

                Comment


                • #9
                  Re: Oil + Gas Mixture 25 Horse Johnson

                  50:1
                  Steve.

                  Comment


                  • #10
                    Re: Oil + Gas Mixture 25 Horse Johnson

                    Amsoil swears by their 100:1 mix and has been for a number of years. So far they haven't gone bankrupt from warranty/liability claims. However, I am not going to do it in my motors. Or tell anybody to do it in theirs.

                    Comment


                    • #11
                      Sign up today
                      Re: Oil + Gas Mixture 25 Horse Johnson

                      Anything that says it can run on 100:1.........ignore it. 50:1 is about the leanest any outboard should be run at. Motors that spend a lot of their time at WOT, I would bump the mix up to 32:1 If they troll 85% of the time or more, then it's okay to run leaner.
                      Admiral Zephyr

                      1941 Johnson HD-20 (in restoration)
                      1947 Sea King 5hp
                      1948 Evinrude Sportsman
                      1951 Evinrude Fastwin
                      1955 Johnson CD-12
                      1955 Johnson RD-17
                      1955 Evinrude Big Twin
                      1956 Johnson RD-18
                      1957 Evinrude Big Twin
                      1958 Evinrude Fisherman
                      1958 Johnson FDE-12
                      1959 Johnson RDSL-21B
                      1974 Tanaka 1hp (screamin' drink mixer )

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