2003 ST 4 Stroke 9.9/15HP Johnson outboards Service Manual, Page 90Get this manual
FUEL SYSTEM
CARBURETOR
Inspection
Clean thoroughly with cleaning solvent and compressed air before inspection
AWARNING
Wear safety glasses when using compressed air to expel solvent, carburetor cleaner etc
IACAUTION I
Do not place any rubber, plastic and non-metallic parts in cleaning solvent, as severe damage or deterioration will resultNOTE: Wire or small drill bits must not be used to clean carburetor orifices and jet