Timing Big Twin/RD Rope Starter

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  • March 23, 2018 at 3:52 pm #9474
    Mumbles
    Participant

      Does anyone have the instructions or page number handy for timing the starters with compression relief on these motors? I glanced thru the 10th edition but couldn’t find it. I know it’s in there somewhere.

      March 23, 2018 at 4:19 pm #72908
      crosbyman
      Participant

        Canada Member - 2 Years

        would loosening the linkage help….page 316 timing the starters ??? question ambiguous to me anyway

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        Joining AOMCI has priviledges 🙂

        March 23, 2018 at 5:19 pm #72910
        frankr
        Participant

          US Member

          The compression relief is "timed" by using the correct rope length. When recoiled, the arm should be in the position shown. As soon as you begin to pull the rope, the arm moves outward in the scroll, opening the valves.

          March 23, 2018 at 5:36 pm #72911
          Mumbles
          Participant

            Thanks Frank. That’s exactly what I was looking for.

            Now the valve gap?

            March 23, 2018 at 5:57 pm #72912
            frankr
            Participant

              US Member

              Valve clearance is .018"-.025". Adjust with motor cold and rope recoiled. Loosen locknut and turn screw in till it just touches valve stem, then back it out one half turn which will give approx .025". Check with feeler gauge.

              BTW, this stuff is given in the powerhead section of my service manual.

              March 23, 2018 at 6:42 pm #72914
              Mumbles
              Participant

                Found it! Pages 316-317 in the 10th edition.

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