1992 Johnson Evinrude "EN" 9.9 thru 30 Service Manual, P/N 508142, Page 46Get this manual
Synchronization and Linkage Adjustments20 It 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 rangeIf equipped, remove both remote control cables from the engine before performing these adjustmentsCam Follower Pickup Point
rv theConnect throttle shaft amplifierlike the one shown, to 1carburetor throttle shaftr:;] 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 rJl 3To adjust, loosen the screw retaining the adjustment lever to the throttle shaftSlide the adjustment lever up or down to make the adjustmentMaximum Spark Advance