1998 Johnson Evinrude "EC" 2 thru 8 Service Manual, P/N 520202, Page 44Get this manual
Synchronization and Linkage Adjustment thru 8
INote 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 rangeThrottle Cable Adjustment
1As you face the steering handle, turn the idle speed adjustment knob counterclockwise to minimum speed positionTurn twist grip throttle clockwise to the lowest throttle setting 2Verify the throttle cam is against its idle stop
3Remove the screw retaining the throttle cable bracket to the powerhead