1921 Elto Lightwin Model F

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  • January 6, 2026 at 10:40 am #303084
    Aidan Smith
    Participant

      US Junior Member

      I’ve had this Rudder Twin in my collection for close to 3 years now.

      I got it cheap, because it must have been run without oil at some point.

      The piston rings are completely friction welded to the cylinders and completely unusable. I’ve tried every imaginable method to unstick them, but nothing. Other club members have also suggested wall decor.

      Would it worth saving this one? I believe that it is a very early production, as the Serial is #F1745. No other numbers on the tag. I would need to find a powerhead, and rebuild the timer and coil.

       

      Any advice is appreciated..

       

      Thanks!

       

      IMG_7599

      "Shells sink, dreams float. Life's good on our boat."
      1921 Elto Light Twin F
      1950 Mercury KF-7
      1951 Mercury KG-7
      1959 Mercury Mark 6A

      January 6, 2026 at 11:08 am #303088
      RICHARD A. WHITE
      Participant

        Lifetime Member

        Heat is your friend, remove the powerhead from the tower, recheck for stuck rings, yes I have seen a gear case stuck making previous owner think it was the powerhead. Also had a recoil stuck making owner think motor was junk…

        Remove exhaust manifold. Spray or pour mystery oil of your favorite flavor, Kroil, PB Blaster, 50/50 Acetone/ Transmission fluid. drop that in the exhaust ports, not quite full, then apply heat, MAP gas is best. Heat it until the oil starts boiling. stop and let it get cold…repeat until the piston moves, you can turn the powerhead over and drop fluid in the bore thru the spark plug holes and do that as well heat it until the fluid boils. I spent weeks nightly on a powerhead.. it lost and now is a running motor.  I have yet to NOT have this succeed.. 6 motors saved and counting. Keep a fire extinguisher handy, but that should be in everyone’s shop that uses fire makers…  You will in time see the fluid “drain” that is a great sign…. the fluid will “evaporate” due to heat…just add more.

         

        Good luck

         

        Richard

        http://www.richardsoutboardtools.com
        classicomctools@gmail.com

        1 user thanked author for this post.
        Aidan Smith
        January 6, 2026 at 1:19 pm #303091
        Aidan Smith
        Participant

          US Junior Member

          Richard,

          Great advice. Will try this when it gets a bit warmer outside.

          The photos were prior to me digging into find the issue, and the L/U spins perfectly, no noises either.

          I was able to get the pistons off of the crank, and it appears to me that one of the rods is bent, as it has a slight crack in it, and it visibly bent. The other seems OK.

          The motor has fallen over prior to me owning it, and broke two of the tank mounting castings straight off of the casing for the block.

          Do you know any good sources for parts? I’d like to find another powerhead to use as a donor for mine **trying to keep it as original as possible.

           

          Thanks!

          "Shells sink, dreams float. Life's good on our boat."
          1921 Elto Light Twin F
          1950 Mercury KF-7
          1951 Mercury KG-7
          1959 Mercury Mark 6A

          January 6, 2026 at 5:43 pm #303103
          RICHARD A. WHITE
          Participant

            Lifetime Member

            I have a “G” parts motor…stuck and not the same…sorry

            http://www.richardsoutboardtools.com
            classicomctools@gmail.com

            1 user thanked author for this post.
            Aidan Smith
            January 6, 2026 at 7:09 pm #303104
            labrador-guy
            Participant

              US MEMBER PAY BY CHECK

              Have you tried the grease gun trick to get you motor unstuck?   The simple hydraulic pump can put a lot of pressure on things.

              dale

              January 6, 2026 at 9:20 pm #303109
              Aidan Smith
              Participant

                US Junior Member

                What are you asking for the “G” parts motor? I’ve got a friend who has a G in need of some parts as well.

                "Shells sink, dreams float. Life's good on our boat."
                1921 Elto Light Twin F
                1950 Mercury KF-7
                1951 Mercury KG-7
                1959 Mercury Mark 6A

                January 7, 2026 at 5:46 am #303114
                RICHARD A. WHITE
                Participant

                  Lifetime Member

                  Nothing…… If anyone from your area is coming to Constantine or Tomahawk, let me know…..I can get it to them there.  I will get you pics in a week or so when things settle down here.

                  http://www.richardsoutboardtools.com
                  classicomctools@gmail.com

                  1 user thanked author for this post.
                  Aidan Smith
                  January 7, 2026 at 8:10 am #303116
                  Aidan Smith
                  Participant

                    US Junior Member

                    That would be awesome. I will check around and see who is heading that way this summer. I may be able to make it, not sure yet. Photos would be great, take your time!

                    "Shells sink, dreams float. Life's good on our boat."
                    1921 Elto Light Twin F
                    1950 Mercury KF-7
                    1951 Mercury KG-7
                    1959 Mercury Mark 6A

                    1 user thanked author for this post.
                    RICHARD A. WHITE
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