Honda BF20 BF2A Outboard Motors Manual, Page 25Get this manual
3FUEL TANK Gasoline flammable and explosive under certain conditionsDo not smoke or allow flames or sparks near the outboard motor while draining fuelAlways work in well-ventilated areaBe sure to store drained fuel in safe containerBe careful not to spill fuelSpilled fuel or fuel vapor may igniteI any fuel spilled, make sure the area is dry before starting the engine
[BREATHER VALVE Hand-tighten fully into the fuel cap body
[2] BREATHER VALVE GASKET ,1 FUEL CAP BODY [a] FUEL CAPSPRING
[5] FUEL CAP LINK
[I81 FUEL CAP GASKET 1171 FUEL CAP BREATHER SPONGE 1161 FUEL CAP INNER [I51 mm PLAIN WASHER 1141 rnm LOCK PIN
After threading the breather valve into the fuel cap body, install parts; secure
[81 mm PLAIN WASHER