2003 Johnson ST 6/8 HP 4 Stroke Outboards Service Manual, PN 5005471, Page 103Get this manual
FUEL SYSTEM
CARBURETOR
Remove the air vent
Idle mixture needle and spring Float chamber Hinge pin, float, and float valve Inlet valve and gasket High-speed orifice Idle adjustment screw and spring 7Air vent
Cleaning and Inspection
Carburetor Cleaning IMPORTANT: Never clean carburetor by submerging or soaking it in hot tank or carburetor cleanerDo not expose plastic or rubber parts to any carburetor cleanerBefore inspection, all carburetor components must be thoroughly clean Carburetor must be completely disassembled Clean parts with Carburetor and Choke Cleaner Use clean bristle brush to remove gum or varnish deposits Blow dry with shop air of not more than 25 psi (172 kPa)When drying passages, direct the flow of shop air opposite to the direction of fuel flow