Honda BF20A-BF25A, BF25D-BF30D Outboard Motors Shop Manual., Page 280Get this manual
Fuel Line (112) Gasoline is highly flammable and explosiveYou can be burned or seriously injured when handling fuelKeep heat, sparks, and flame awayHandle fuel only outdoorsWipe up spills immediately
Before disassembly, drain the fuel from the carburetor and fuel lines completelyCheck each tube for deterioration and cracks before connecting the tubesReplace {he tubes if necessary