2003 Johnson ST 6/8 HP 4 Stroke Outboards Service Manual, PN 5005471, Page 54Get this manual
MAINTENANCE SYNCHRONIZATION AND LINKAGE ADJUSTMENTS
SYNCHRONIZATION AND LINKAGE ADJUSTMENTS
IMPORTANT: It is important that these step-bystep procedures be followed in sequence and be performed exactly as written to ensure consistent engine idling and smooth operation throughout the RPM rangeThe boat must be in water, under normal operating conditions, with correct propeller installedThe boat's movement must be unrestrained The boat must not be tied to dock or trailer
Stop the engineRemove the screw and washer retaining the throttle cable bracket
IMPORTANT: 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 MIXTURE ADJUSTMENT in FUEL SYSTEM sectionStart engine and run to normal operating temperatureReduce engine speedTurn the idle adjustment knob counterclockwise to the full SLOW position8 HP Models 1Throttle cable bracket