Home Forum Ask A Member 1931 Johnson OA-55 3hp.

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  • #293649
    Tubs
    Participant

      I can’t bring up your picture right now. I’m sure the issue will be resolved shortly. But looking at your thumb nail, you have the best one I have ever seen.

       

      A "Boat House Repair" is one that done without having tools or the skills to do it properly.

      #293766
      Tubs
      Participant

        Been cleaning. The coating on this motor is really something. Where it was mixed with gear oil it came off pretty easily using some engine degreaser. The rest is mostly dirt so petroleum solvents have little effect. A water based degreaser would dissolve about half of what was on there. Removing the rest required a wire brush, steel wool, a scratch pad or any combination of the 3, and some other special tools, being careful not to damaging the part underneath. Not complaining. Its like unwrapping a gift to find what’s inside. Sometimes it makes me happy, other times, not so much. I tried soaking a few parts in a bucket of warm water. Tried biodegradable paint remover on part of the powerhead. They didn’t work any better than what I was using. Both screws were frozen on the transom clamp. One is bent. Trailer ride? Straightened it as best I could.  Found some light tan paint on the gear case. Original? The fuel line still has most all of its nickel plating. Got everything stuck, freed up. Few more parts to go. This motor shows signs of significant use but its condition is not near as bad as I was thinking.  

        A "Boat House Repair" is one that done without having tools or the skills to do it properly.

        #293771
        Buccaneer
        Participant

          US Member

          On my 1930, I just cleaned it up as it had nice patina.
          Not sure if it had tan paint on the lower unit or not.
          DSCN3835

          Prepare to be boarded!

          #293773
          Tubs
          Participant

            I can see why. Yours looks a bit nicer than mine. Epically your gas tank. I have quite a bit more to do before I will know if this one will run.

            A "Boat House Repair" is one that done without having tools or the skills to do it properly.

            #293865
            Tubs
            Participant

               

              Cleaning the muffler was quite a chore. I need to get all the carbon out before I can try to remove the dents. I have read that the muffler was nickel plated. I was skeptical but it appears to be true.  I saved the flywheel for last. I knew it was going to need sanding. I have quite a bit of time in both of these. The flywheel is ready for the buffer when the weather gets better. 

              A "Boat House Repair" is one that done without having tools or the skills to do it properly.

              #293987
              bob-d
              Participant

                US Member

                Tubs following the progress. It’s looking great.
                What were the different grades of paper you used for sanding the flywheel? Wet or dry?
                It really doesn’t even look like it needs a buffing wheel. The plugs came out amazing as well. They will look so much better than a new set of Champions.

                Bob D

                #293988
                Tubs
                Participant

                  Bob, I find the fastest way for me, to get past the pitting and staining, is to use 320 first. I have to accept that some bruises are just too deep to remove. Then 400. I find that 220 will get you into good material quicker, but the time it takes to get the 220 scratches out seems to be more work than just starting with 320. By the time I have gone around the flywheel twice I’ve usually had enough of it. I find that the 400 surface buffs up, on a buffer, fairly easily for me.  I wet sand using a spray bottle rather than a bucket of water. I’ve done a few model A flywheels and the quality of the aluminum from the Lynite Company is significant better than their castings for the earlier motors. 

                  A "Boat House Repair" is one that done without having tools or the skills to do it properly.

                  #294000
                  bob-d
                  Participant

                    US Member

                    Tubs, wow you started out with 320 with all of the pitting.
                    It’s very interesting that if you use 220 you have to work on all the scratches. Never realized that.
                    Lesson to all, if you think you can use a courser grade to initially save time, it will come back to bite you later.
                    Waiting for the master class on the tank.
                    Thanks for documenting all of your progress so far.

                    Bob D

                    #294004
                    davidk
                    Participant

                      US Member

                      I found this forgotten project in the barn.  “Forgotten” because I broke one of the water lines and couldn’t find a good replacement so I put it on the rack and moved on.  Posting these photos to show another example.  Looks to have the same paint on the lower unit, and the flywheel, that you were wondering about Tubs.

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                      #294009
                      davidk
                      Participant

                        US Member

                        Fuel tank is in rough shape.  Must have fallen backward too many times so they soldered a lucky penny onto it.

                        IMG_2418
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