Home Forum Ask A Member Painting gas tanks.

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  • #233268
    Mumbles
    Participant

      To clean any rust from the inside of the tank, the anode will have to be placed inside the tank and suspended so it doesn’t touch the tank at all.

      Cooking-Tanks

      #233275
      Timothy McDonald
      Participant

        I put PVC pipe around the iron pipe to insulate it. Iron pipe is both inside and outside.

        IMG_20210307_222118178

        • This reply was modified 3 years, 11 months ago by Mumbles.
        #233385
        Timothy McDonald
        Participant

          So far, the best anode I made is this 1/2 inch ungalvanized pipe with 3/4 inch pvc to keep it from touching the tank.
          Again, this tank subject is common and complicated. I found a ’46 Neptune with a steel tank but it seems they were more common mid 60’s to mid 70’s. My local outboard dealer is not happy with steel tanks and is glad they are gone..mostly?.
          I can tell, the general condition of the original tank is a big issue. About painting the inside, answer is yes, you do paint but you buy special paint.
          There are a lot of multi part compounds, mixed epoxies really, which will basically give you an epoxy tank inside the old tank. There are failures with these as well. It will always come back to how bad was the steel tank and how much effort did you give to cleaning the rust and patching the holes. Pin holes are one thing, large holes another. Nothing cheap or easy.
          I’ve got my ’68 Evinrude tank back in the electrolysis solution. I will get every bit of rust out and see clean metal everywhere. At that point I will paint the inside with Red-Kote.
          More coming.

          #233386
          Timothy McDonald
          Participant

            Here the anode is insulated from the tank and the anode clamp is out of the water. Seems best.

            #233390
            bobw
            Participant

              US Member

              That’s one nasty looking mess you’re cooking!

              Bob

              1937 Champion D2C Deluxe Lite Twin
              1954 Johnson CD-11
              1955 Johnson QD-16
              1957 Evinrude Fastwin 18
              1958 Johnson QD-19
              1958 Johnson FD-12
              1959 Johnson QD-20

              “Every 20 minute job is only a broken bolt away from a 3-day project.”
              "Every time you remove a broken or seized bolt an angel gets his wings."

              #233473
              Timothy McDonald
              Participant

                Mumbles,..What kind of paint/coating, did you use on the inside of the tanks?

                #233479
                Timothy McDonald
                Participant

                  Put the first coat of Red-Kote today. Thinned 20%. I’ve two other tanks in soda water. The Evinrude had no leaks, just lots of rust and so it could be treated with soda only in the tank itself. These other two have pin holes and have to be submerged. Very time consuming changing the anode and cleaning it changing water, but I am quite happy with the small tank.

                  #233480
                  Timothy McDonald
                  Participant

                    The red tank is a’47 Neptune. The larger a ’69 Eska. Both with holes

                    #233635
                    Timothy McDonald
                    Participant

                      The small Evinrude tank got it’s second treatment of Red-Kote inside today. Red-Kote is thick paint and you have to rotate the tank often while “painting” it and for an hour afterward to avoid puddling paint inside. Now to the other two. Both have pin holes. The more electrolysis, the more pin holes. Rust was thick and deep.
                      What I surmise….unless the tank holds gas it doesn’t matter how pretty it is…it’s just a wall hanger.

                      #233747
                      Timothy McDonald
                      Participant

                        Using a small flashlight I was able to look in the lower corners of the treated tank. I had some gaps. I used a third coat to cover them. The “paint” is the viscosity of syrup. Next time I pour the syrup in the tank I will allow one full minute of rotation for each side of the tank…six minutes at least. Two days to dry at least. I’ll paint the outside tomorrow.

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