1998 Johnson Evinrude EC 50 thru 70 HP 3-Cylinder Service Manual, Page 41Get this manual
Throttle Plate Synchronization
1Loosen the cam follower screw and push the cam follower away from throttle camThe follower MUST NOT touch the throttle cam during this procedure2Loosen upper and lower carburetor linkage screws
3Verify that all throttle plates are closed]4Apply light upward pressure to the tabs of the adjusting links and tighten first the lower then the upper carburetor linkage screwsCam Follower Pickup ]1Snap the throttle link coupler shell off the throttle cam ball