1998 Johnson Evinrude "EC" 2 thru 8 Service Manual, P/N 520202, Page 42Get this manual
Synchronization and Linkage Adjustments4
INote It is importantthatthis 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
Cam Follower Pickup Point
rn 1to the carburetor throttle shaftConnect the throttle shaft amplifier, such as the one shown,2Advance the throttle until the tip of amplifier begins to moveAt this point, center of the roller should align with single mark on cam[] 3Back out cam follower adjustment screw with OMC Ballhex Screwdriver, PI 327622, until the throttle valve is closed completelyThen advance the screw until the throttle shaft just begins to rotate4Repeat Step to verify adjustment