1998 Johnson Evinrude EC 5 thru 15 HP Four Stroke Service Manual, Page 48Get this manual
Synchronization and Linkage Adjustments thru 9.9 (211 cc) Tiller Models
INote You
must perform this step-by-step procedure exactly as written to ensure consistent engine idling and smooth operation throughout the RPM range Idle Speed 1The boat must be in water, under normal operating conditions, with correct propeller installedThe boat's movement must be unrestrainedThe boat must not be tied to dock or trailer
INote The idle mixture in the carburetor is controlled by factory
adjustment to meet current emission standardsAdjustment should only be disturbed for cleaning or rebuildingIf the adjustment has been disturbed, refer to Carburetor Adjustment, Section 2
2Start engine and run to normal operating temperature 3Reduce engine speedAdjust the idle speed adjustment knob counterclockwise to the full SLOW position 4Stop the engineRemove the screw and washer retaining the throttle cable bracket