1996 Johnson Evinrude "ED" 90 CV 88 thru 115 Service Manual, P/N 507126, Page 39Get this manual
Throttle Valve Synchronization 1With the engine not running, remove the air silencer cover to observe the throttle valve action rn 2Loosen the throttle from the throttle cam.ThePush the cam follower screw throttle cam follower away throttle
cam follower must not touch the throttle cam during this procedure
rn 3Loosen the lower carburetor lever adjusting screw 4Partially open the throttle shafts and allow them to snap closed to be certain the throttle valves are closedPress downward on tab of the adjusting link to remove backlashTighten the adjusting screwMove the cam follower and check that the throttle shafts start to rotate at the same timeCam Follower Pickup