64 McCulloch 7.5hp low profile spark plugs

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  • July 27, 2016 at 7:56 pm #4857
    jerryswiss
    Participant

      I was actually buying another motor from a guy and I talked him into throwing in this motor also. Can anyone tell me the correct spark plug, and any other tune up info. Thanks

      July 27, 2016 at 9:06 pm #41066
      retiredoz
      Participant

        Spark plug H10J (or H10C, nowadays, at .035. Points at .020. Hope you don’t need to replace the impeller, it’s an exercise.

        July 28, 2016 at 10:08 pm #41157
        jerryswiss
        Participant

          Thanks for the info. Got some plugs, cleaned and set the points, its got spark and compression and shifts through the gears. Now I have to deal with the fuel pump 🙂 .

          July 28, 2016 at 11:40 pm #41165
          retiredoz
          Participant

            I believe you’re about to discover one of the fringe benefits of the ‘low-profile’ : You can’t do much of anything with it without pulling the powerhead
            first. And if you’re going to do that, might as well do the impellers too..

            July 29, 2016 at 10:25 pm #41196
            jerryswiss
            Participant

              I hear ya. Heard that was a job, anyone done that before?

              July 29, 2016 at 11:26 pm #41198
              frankr
              Participant

                I was appalled at what was involved getting at the lower unit on the early models. But I’m not sure–didn’t they put in a shift rod disconnect later on? I still didn’t like them. But some people do, so what can I say?

                July 29, 2016 at 11:31 pm #41199
                retiredoz
                Participant

                  Book says to remove starter and flywheel to get access to the screws holding the power head to the tower. If memory serves, those are really screws.

                  My own (faulty) memory hints that removing the mag plate as well makes it a little easier to get at one of those things. The parts manual says there are nine of them.

                  You also need to disconnect the shift setup…

                  I’m pretty sure somebody uploaded a Sears outboards repair manual – that would have the service info you need. But I don’t have the link, somebody ???

                  July 29, 2016 at 11:42 pm #41200
                  wedgie
                  Participant

                    Here ya go!

                    July 31, 2016 at 2:28 am #41274
                    jerryswiss
                    Participant

                      Thanks for that down load Wedgie, but I am having trouble accessing it. Is there something I need to do to get it?

                      July 31, 2016 at 3:47 am #41278
                      wedgie
                      Participant

                        Hey Jerry

                        You need Adobe pdf viewer. https://get.adobe.com/reader/otherversions/

                        Anybody else having a problem downloading and/or opening the file?

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