1998 Johnson Evinrude EC 5 thru 15 HP Four Stroke Service Manual, Page 47Get this manual
Idle Speed 1The boat must be in the water, under normal operating conditions, with the 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 standardsThe adjustment should only be disturbed for cleaning or rebuilding purposesIf the adjustment has been disturbed, refer to Carburetor Adjustment, Section 22Start the engine and allow it to reach normal operating temperature
3Stop the engineRemove cable anchor retainerRemove throttle cable trunnion nut from anchor pocket
4Pull on throttle cable to move the throttle cam away from the cam follower roller5Connect your shop tachometer pickup on the ignition coil's primary lead, and set its selector switch on 2-cycleStart the engine and verify idle speed in FORWARD gear