2009 Yamaha F40 Outboard Service Manual, Page 151Get this manual

2009 Yamaha F40 Outboard Service Manual, Page 151

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Fuel pump assembly

Specified positive pressure: 50.0 kPa (0.50 kgfcm2, 7.3 psi)

Disassembling the fuel pump assembly
1 Remove the cover a, the diaphragm b, and the fuel