1990 Johnson Evinrude "ES" 9.9 thru 30 Service Manual, P/N 507871, Page 47Get this manual
Synchronization and Linkage Adjustments20 thru 30 Models
INote lit is important that this step-by-step procedure be followed
in sequence and be performed exactly as written to ensure consistent engine idling and smooth operation throughout the RPM range
INote Ilf equipped, remove both these adjustmentsfrom the remote control cables engine before performing
Cam Follower Pickup Point
1Connect throttle shaft amplifier to the carburetor throttle shaft
like the one shown,
r;;J 2Advance the throttle by moving the throttle control lever until tip of the amplifier begins to moveAt this point, the cam follower should contact the cam between the two marks
3To adjust, loosen the screw retaining the adjustment lever to the throttle shaftSlide the adjustment lever up or down to make the adjustment
Throttle Control Rod 1While rotating the propeller shaft, move shift lever to FORWARD gear2Advance throttle lever to contact stop on cylinder block3Carburetor throttle plate should be horizontal and the throttle shaft must be free-movingrl4