1962 18hp Johnson Only Runs With Choke.

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  • September 7, 2016 at 3:46 am #43511
    mstrader77
    Participant

      For those that are interested, this is what the motor is going on. I started building it May 25th.

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      September 7, 2016 at 10:00 am #43516
      david-bartlett
      Participant

        Nice looking boat!

        By the way, the low speed(Pointy one) is the top and high speed(Blunt one) needle is on bottom.

        September 7, 2016 at 12:28 pm #43518
        Anonymous

          mstrader77
          If you look at my CD12 the carb is marked for the hi and lo needles.
          That was the first motor I worked over with ign. and carb overhaul.
          I’m a little to Polish sometimes!
          It took a little while to grasp the hi needle on bottom, lo needle on
          top. 😕

          Steve A W

          September 7, 2016 at 3:08 pm #43524
          outbdnut2
          Participant

            US Member
            quote mstrader77:

            I think I found the problem. I Another problem I gave myself was reversing the low and high needle settings. I just realized that the high needle is on the top and the low side is on the bottom. .

            –
            I believe you had the needles right the first time – high on the bottom and low the top. Yes the bottom needle goes in where gas comes off the bottom to go up the side for idle, but if you look close you will see that bottom needle is really limiting how much gas goes up that center brass tube to the venturi in the center of the carb throat – that’s the high speed path. After gas goes up the passage in the side of the carb, it gets limited by the upper needle before passing into the carb throat through the small holes at the top of the throat for idle. It’s easy to get these things confused – I went through all that many years ago until I got it straight!
            Dave

            September 7, 2016 at 3:44 pm #43527
            fleetwin
            Participant

              US Member

              Sounds like you have located the problem(s)!
              You will find this engine runs just as smooth, if not smoother than any four stroke out there, it will prove to be strong and reliable as well.
              Once again, the high speed needle is the one on the bottom of the carb and is set 3/4 turns out from gently seated. The low speed needle is the top one and is initially set 1.5 turns out from gently seated….

              September 7, 2016 at 4:15 pm #43528
              mstrader77
              Participant

                I guess I had switched the inside knob for the outside knob. I will pay better attention in the future. Hopefully, it will idle at this point and any adjustments will have the effect they should. I’m going to try and run it this evening. Hopefully, all will go smooth. If it does, maybe I will have the confidence to invest the time into the TN-28 5hp that I got at the same time as the FD-16.

                September 7, 2016 at 5:00 pm #43532
                outbdnut2
                Participant

                  US Member

                  ….and after the TN-28…..careful – this hobby gets addictive….and motors seem to multiply in your garage after awhile! Spread the word that you are into old motors and friends/neighbors may all be asking you to come get an old motor out of their garage or basement that was dad’s or grandpa’s that they don’t want anymore.

                  Nice job on that boat! Hope all goes well on the maiden voyage!
                  Dave

                  September 7, 2016 at 5:46 pm #43534
                  Anonymous

                    mstrader77
                    Being that your a home boat builder have you read Max Wawrzyniak’s book
                    "Cheap Outboards"?
                    https://www.amazon.com/gp/search/ref=as … UYD7GHPLGD
                    When I first got into old outboards I learned a lot from this book.
                    A lot of people don’t care for it, but it’s not aimed at veteran mechanics, it’s aimed at
                    novice motor owners looking for cheap power that’s easy to work on.
                    Is your boat a Michalak AF4? You’ve got a good looking boat there.
                    Good Luck on the maiden voyage.

                    Steve A W

                    September 7, 2016 at 6:21 pm #43538
                    mstrader77
                    Participant

                      I haven’t read the book, but I have read many of his articles on the duckworks site. I actually used some of Max’s modifications (5/8" bottom, 2×4 keel, "truck cabin" bow area) on his AF4 in the building of my own.

                      Another question – I know that the stated fuel mix is 24:1, but I have read that the 1962 FD-16 motor is the same as the newer (late 60’s & 70’s) motors that use a 50:1 mix. Is it safe to run the 50:1? Any oil brands that smoke less than others? I don’t expect this motor getting used hard on this boat.

                      September 7, 2016 at 6:47 pm #43541
                      Anonymous

                        Since his book was mentioned here is my index to all of Max’s original articles (not as grease friendly as the book tho!)

                        http://www.omc-boats.org/maxw.html

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