1946 johnson 5hp rebuild.

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  • June 22, 2015 at 11:46 pm #1832
    tetonguy
    Participant

      Newbie here.
      I am a good motor mechanic,never worked on outboards. 😮 Have a 1946 Seahorse I am trying to get running. Bought it with no carb. Found one on ebay ( yeah) 😆 and have been slowly cleaning it all up. Its a long way from running as I am still in teardown mode.
      Question: Have the tank and cover off and have loosened the top nut on what I believe is the housing which hides the points. It spins freely along with the drive/propeller shaft all the way down. How do I get it off? Cant see any screws on the top or bottom, I figured the top nut when it came off would allow me to lift it off. The throttle lever moves freely as well no binding there. I don’t want to damage anything so suggestions /diagrams would help. Soaked the top nut area with penetrating oil for a few days and no change there. Thanks in advance for all the knowledge here, makes getting this old motor a fun project for me. 😀

      Pete

      June 22, 2015 at 11:58 pm #18722
      chris-p
      Participant

        That is the flywheel. It has a taper, that is matched to the crank shaft, and is torqued on. You will need a puller to get it off. Harmonic Balancer puller with grade 8 bolts, 1/4-20 about 3" long. Thread them in about 7/16", then start tightening down on the puller bolt. The 5hps usually pop off pretty easy.

        The following site should help as well.

        http://www.pochefamily.org/outboard/

        June 23, 2015 at 12:07 am #18723
        tetonguy
        Participant

          Thanks Chris. now where did i put that puller…haha.

          June 23, 2015 at 3:35 am #18743
          jeff-register
          Participant

            US Member - 2 Years

            Newbie,
            You will find many are here to help you with your motor. Give the guys a few days to respond. They are fun to build them once you get it figured out,
            Jeff

            June 23, 2015 at 4:13 am #18746
            legendre
            Participant

              @tetonguy

              Would that be a 1946 TD20? Look for the model number stamped on a raised boss, on the engine case.

              And you will need to remove the flywheel nut as well as the pulley sheave, to extract the flywheel. Three screws into the flywheel, plus the puller pressure stud bearing on the crankshaft end to extract it. Beneath you will find two each magneto coils, breaker points sets and condensers.

              The points hold up well, the condensers are a crap shoot (as ever). The coils also seem to do pretty well, though the plug wires might be suffering. If you need to replace the plug wires, you’ll have to solder in a couple lengths of 7mm copper-core ignition wire, which is available from O’Reily Auto and other sources.

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