1959 lark 35hp questions

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  • August 9, 2017 at 3:05 pm #62724
    lindy46
    Participant
      quote VinTin:

      There are adjustments either on the connector from the roller to the throttle butterfly or under the flywheel the machine screws that hold the brass cam in place. You need to adjust until the throttle butterfly is just beginning to open when the roller lines up centered on the hash mark on the brass cam. It is way off!

      NO! you have it lined up properly. The butterfly should just start to open when the arrow to the left of the roller hits the mark on the cam. Adjust it by loosening the bolts on the cam and adjusting the cam in and out to make it so. You need to replace that roller – it is heavily grooved which can throw timing off.

      August 9, 2017 at 4:07 pm #62726
      opposedtwin
      Participant

        US Member

        Thanks lindy. I thought i had it right. I’ll get that cam follower replaced. They seem to get grooved pretty quickly and easily. Seen many of them with electrician’s tape on them. One I replaced about 3 years ago is already grooved.
        What about that second picture of the throttle gears? Does that look correct to you? I’m still not sure what would account for you guys being at only about 2/3 throttle when the piece is at the stop when i’m already at full throttle at that same point.

        August 9, 2017 at 4:10 pm #62727
        opposedtwin
        Participant

          US Member

          Thanks lindy. I thought i had it right. I’ll get that cam follower replaced. They seem to get grooved pretty quickly and easily. Seen many of them with electrician’s tape on them. One I replaced about 3 years ago is already grooved.
          What about that second picture of the throttle gears? Does that look correct to you? I’m still not sure what would account for you guys being at only about 2/3 throttle when the armature plate is at the stop when I’m already at full throttle at that same point.

          August 9, 2017 at 5:33 pm #62731
          vintin
          Participant
            quote lindy46:

            quote VinTin:

            There are adjustments either on the connector from the roller to the throttle butterfly or under the flywheel the machine screws that hold the brass cam in place. You need to adjust until the throttle butterfly is just beginning to open when the roller lines up centered on the hash mark on the brass cam. It is way off!

            NO! you have it lined up properly. The butterfly should just start to open when the arrow to the left of the roller hits the mark on the cam. Adjust it by loosening the bolts on the cam and adjusting the cam in and out to make it so. You need to replace that roller – it is heavily grooved which can throw timing off.

            You are right of course about the hash mark and pointer lining up. My bad. I was thinking of a 25 1969 I was just working on.

            August 9, 2017 at 11:35 pm #62741
            lindy46
            Participant

              I’m not sure what that second picture represents. Not sure what "gears" you’re talking about. The "ears" on the vertical control rod should fit into that connector and the top of the rod should connect to the mag plate. When you advance the throttle, that rod should advance the mag plate.

              July 31, 2022 at 7:53 pm #263870
              mark weaver
              Participant

                This is some good detailed advise here.

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