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Yamaha 80, Outboard Jet , Shift linkage Adj & Parts

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  • Yamaha 80, Outboard Jet , Shift linkage Adj & Parts

    The shift linkage on my outboard was out of adjustment.
    Tried to adjust with the "Cam" nut but still out of kilter.

    Called Greatland welding,
    They had answers.
    Drove it over there, learned lots.

    Got new cup pins & bushings
    New roller & roller shaft.

    Amazing how well it lock into forward now & Neutral & Reverse line up properly .

    The nylon bushings are easy to replace,
    On my PM list now for every couple years .
    Pins should last forever if the bushings are replaced
    before they were thru & start wearing the metal pins.

    Both my bushings , on the cup were worn thru & had worn on the pins.
    the roller & roller shaft were worn enough to rattle.

    With new parts, adjusting it is easy

    Adjust the cam nut so the roller locks into forward snugly .
    (the Cam nut is the forward nut holding on the shifting plate, mine is 7/16 to loosen & an adj. wrench to turn the cam)
    Pic shows it locked in Fwd.

    If the pins & bushings are tight, Neutral & Reverse should be real close.
    You can't adjust reverse & neutral, so with it adjusted for forward to be locked in ,
    reverse & neutral are what you got.


    PS. when trailering/traveling, place the shift lever in "Forward", this keeps the linkage hinge points snug,
    reducing rattle & wear on parts.
    Attached Files

  • #2
    Mud,
    It also occurs because the little plunger pin (spring loaded about the size of a pencil that the reverse cup mates up against the body) gets packed off with sand/gravel and does not act like a shock absorber anymore. While running the river your reverse cup will then hit the water stream coming out of the back, slap up against the pin, repeat, repeat, etc... and prematurely wear the bushings and pins as you have found out.

    Every time you run the river push your little plunger a couple times to make sure it is functioning and will prolong the reverse cups components.
    BK
    BK Marine Services 232-6399
    Alaskas only Planar diesel heaters dealer, service, warranty, and installation.
    Alaskas only Lonestar drum winch dealer, Whirlwind props, Stinger gearbox, and Alumatech airboats.
    Www.bkmarineservices.com

    Comment


    • #3
      Very Good point.
      It's the little black (spring loaded) bumper on the cup , it should contact the bottom of the foot when locked in Fwd
      I found mine had the screw bent & stuck in very short. No doubt, a reason my parts wore so much.
      I thought the bumper was a screw adjustment, but it is spring loaded.

      Lots of learning for me being new to jets.
      Good to have tips from long time jets folks .



      Originally posted by bkmail View Post
      Mud,
      It also occurs because the little plunger pin (spring loaded about the size of a pencil that the reverse cup mates up against the body) gets packed off with sand/gravel and does not act like a shock absorber anymore. While running the river your reverse cup will then hit the water stream coming out of the back, slap up against the pin, repeat, repeat, etc... and prematurely wear the bushings and pins as you have found out.

      Every time you run the river push your little plunger a couple times to make sure it is functioning and will prolong the reverse cups components.
      BK

      Comment

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