Honda BF8, BF9.9 and BF10 Outboard Motors Shop Manual., Page 101Get this manual
I.CARBURETOR aREMOVAL
Before removalr drain the gasoline into suitable container from the carburetor by loosening the drain screw
[I] BREATHER TUBE
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 immediateiy
IRemove the engine cover and right engine under cover (P5-312) Open the tube clip (Electric starter type) and disconnect the crankcase breather tube from the silencerCheck the breather tube for deteriorationr cracks or other damageClean or replace if necessary