89 Johnson 9.9 Carb cam follower roller and throttle shaft play

Home › Forum › Ask A Member › 89 Johnson 9.9 Carb cam follower roller and throttle shaft play

Viewing 5 posts - 1 through 5 (of 5 total)
  • Author
    Posts
  • August 2, 2016 at 3:10 am #4898
    PugetSoundBoater
    Participant

      The verticle throttle shaft has some wobble at the bottom,and the gear at the bottom of the shaft is loose also,causing a delay/slop in the whole linkage to the throttle shaft. The pin bushing at the bottom of the vertical throttle shaft is NLA on Marine Engines site .this is a tiller controled motor. Any ideas how to tighten up this area? I’m going to replace the whole cam follower as it has a bunch of slop throughout it also,and is missing a rubber piece that contacts the cam.
      EDIT :Both the upper bearing,clamp control shaft PN 327588 and PN 321997 Pin control shaft lever (bottom) are NLA..Any ideas how to tighten this whole linkage up?

      "Some people want to know how a watch works, others just want to know what time it is"
      Robbie Robertson

      August 2, 2016 at 10:10 pm #41482
      rudderless
      Participant

        I think it is 1/2inch dia. Go to lowes or homedepot or similar. Buy a piece of 1/2 aluminum rod. cut to length. Works fine. But might be 7/16, don’t remember.

        I bought an aluminum rod off ebay that goes from the throttle arm to the gear, has square ends to fit. That really helped…until I went remote..

        I ran a spring from the stator to that arm to take out slop from the link.

        Oh…if one has to remove the stator plate, measure and use a center punch to raise or knurl the low spots on the motor to tighten up that area.

        One can use a beer can shim on the two piece metal clamp, if plastic remove material from the two halfs mating area.

        August 3, 2016 at 2:38 am #41512
        PugetSoundBoater
        Participant

          I improvised like Rudderless suggested. I took a closer look at what/where the slop was in the shaft. I put a washer on the nylon pin sitting at the base. Put the gear on. Wrapped a neat little strip of electrical tape around the rectangular foot of the shaft to make the foot fit tighter in the gear recess.
          On the top throttle shaft bushing I wrapped a neatly cut strip of aluminum foil, wrapped it around the bushing recess on the shaft. Lubed the foil and bushing with motor oil, bolted it back together.The washer raised the shaft for a tighter fit. The foil and tape took the side to side slop out. I think it should last a long time. Thanks for the reply.

          "Some people want to know how a watch works, others just want to know what time it is"
          Robbie Robertson

          August 3, 2016 at 3:03 am #41518
          rudderless
          Participant

            Oh yea, I made a washer out of plastic roll up sno sled under that gear…I forgot that! I guess great minds think alike..

            Don’t forget beer can shims..small cans thin…large cans thick.

            August 3, 2016 at 5:33 am #41522
            Mumbles
            Participant

              To tighten up the square ends of the shafts, I’ve cut thin strips out of brass shim stock and bent the inner end 90 degrees to lock them in place. Works great to eliminate the sloppy feeling!

            • Author
              Posts
            Viewing 5 posts - 1 through 5 (of 5 total)
            • You must be logged in to reply to this topic.