Yamaha Marine Outboards F4A/F4 Factory Service Manual, Page 64Get this manual
INSP ADJ 1 3
FUEL SYSTEM PERIODIC SERVICE
INSPECTION AND ADJUSTMENT
FUEL SYSTEM Fuel tank and Fuel line 1Inspect: 9Fuel Tank and fuel strainer CrackDamageLeak Replace the damaged part(s)Dirt Clean9Fuel line CrackDamageLeak Replace the defective part(s)Refer the "FUEL TANK AND FUEL COCK" section in Chapter 4Fuel cock 1Inspect: 9Fuel cock CrackLeakClogDamage ReplaceRefer the "FUEL TANK AND FUEL COCK" section in Chapter 4Fuel joint 1Inspect: 9Fuel joint CrackLeakClogDamage ReplaceRefer the "FUEL TANK AND FUEL COCK" section in Chapter 4