1987 Johnson/Evinrude CU Outboards 35A thru 55 Service Manual, Page 61Get this manual
Synchronization and Linkage AdjustmentsTiller Handle Models
INote lit is important that this step-by-step procedure betofollowed in sequence and be performed exactly as written ensure
consistent engine idling and smooth operation throughout the RPM range Throttle Cable Adjustment
1As you face the steering handle, turn the idle speed adjustment knob counterclockwise to minimum slow speed position 2Be sure throttle cable bracket is secured to the powerhead using the aft mounting hole3Back out the idle speed screw screw
and wide open stop