2006 Johnson SD 3.5 HP 2 Stroke Outboard Service Manual, PN 5006562, Page 76Get this manual
FUEL SYSTEM CARBURETOR SERVICE
Installation
IMPORTANT: Replace any fuel hose or fuel hose clamp if deteriorated or damagedInstall new O-ring into carburetor throatSlide carburetor onto crankcase and tighten the clamp screw
Carburetor Adjustment
Idle Speed Adjustment
IMPORTANT: For accurate results, test run the engine in the water on the customer's boatStart engine and run it at half throttle until it reaches operating temperature before making adjustmentInspect outboard engine for gasoline leaksRun engine at slow speed and adjust the slow speed adjustment screw until the engine runs in the range of 1100-1300 RPMAllow 15 seconds for the engine to respond to adjustment1Clamp screw