2007-2009 Yamaha F15/F20 Outboard Service Manual, Page 73Get this manual
Fuel system
Hose routing .4-1 Fuel hose, blowby hose, and cooling water hose 4-1 Fuel filter 4-2 Checking the fuel filter assembly4-3 Checking the fuel joint 4-3 Fuel pump 4-4 Checking the fuel pump.4-6 Disassembling the fuel pump 4-6 Checking the diaphragm and valve 4-7 Assembling the fuel pump 4-7 Carburetor unit 4-9 Carburetor .4-10 Removing the carburetor .4-12 Disassembling the carburetor 4-12 Checking the carburetor 4-12 Checking the Prime Start.4-13 Assembling the carburetor4-13 Installing the carburetor .4-14 Adjusting the pilot screw4-14