Honda Outboards BF40A/BF50A Service Manual, Page 327Get this manual
BF40A-BF50A
bDISASSEMBLY
Before disassembly, completely drain the carburetor by loosening the drain screwClean the outside of the carburetor before disassembly[1] Sf THERMAL
Gasoline is highly flammable and explosiveYou can be burned or seriously injured when handling fuel Keep heat, sparks, and flame awaye Handle fuel only outdoors Wipe up spills immediately1) No.1 carburetor only: Remove the screw and set plate, then remove the SE thermal valve and D-ring with care not to damage the needle[3] SET PLATE