1940 Champion Exhaust Carbon on block

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  • July 10, 2023 at 9:49 am #277939
    Matthew Lewis
    Participant

      Hey guys!

      I have a 1940 Champion SF1 that I am cleaning up.  Any suggestions on a method to remove heavy carbon deposits from very loose exhaust?  I was considering using something like “EasyOff” oven cleaner.  Not sure if this is a good idea or not, or if there is a better method.

      Also, the exhaust pipe was held on loosely  by a cotter-pin.  The interaction between the male fitting from the exhaust port on the block and the female tailpipe has a good 1/8 inch of play.  Is this the original design, or a field fix by a previous owner?

      Thank you for any suggestions.

      Respectfully,

      Matt

      July 10, 2023 at 12:24 pm #277944
      Buccaneer
      Participant

        US Member

        My S1F Champion had a cotter pin, and with a worn hole as
        well. I just replaced it with a larger SS cotter pin.

        Prepare to be boarded!

        1 user thanked author for this post.
        Matthew Lewis
        July 10, 2023 at 8:05 pm #277949
        Tubs
        Participant



          Using “Easy Off” oven cleaner to remove carbon
          has been suggested here in the past.
          I’ve never tried it. If you decide to try it
          I’d be interested in hearing your results.
          Tubs          .

          A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.

          July 10, 2023 at 9:02 pm #277950
          Bob Wight
          Participant

            US Member

            I’ve used Easy Off a few times to remove carbon buildup.   Here’s the exhaust housing on an RD-18 I rebuilt a few years ago – works good.  Never had an issue with it etching the metal but I don’t let it soak too long.

            EasyOff-to-Clean-Carbon

            Bob

            1937 Champion D2C Deluxe Lite Twin
            1954 Johnson CD-11
            1955 Johnson QD-16
            1957 Evinrude Fastwin 18
            1957 Evinrude 3022
            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."

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