Yamaha Outboard F15A F9.9C, FT9.9D F15 Service Manual, Page 170Get this manual
CARBURETOR
EXPLODED DIAGRAM (F15A)
REMOVAL AND INSTALLATION CHART
Step ProcedurePart name Diaphragm Screw Float pin Float Needle valve Main jet Main nozzle Plug Pilot jet Pilot screw (except for USA) Q'ty Reverse the disassembly steps for assemblyService points