Honda Outboards BF40A/BF50A Service Manual, Page 341Get this manual
BF40A-BF50A 4) Insert the air vent tubes into the holes of the engine under case as shown[1] AIR VENT TUBES
UNDER CASE
5) Connect the fuel tubes to the fuel pump and secure them with the tube clip B10 Connect the fuel tube (No2 and carburetor supply line) to the marked fitting Connect the 240 mm fuel tube (No1 carburetor supply line) to the marked fittingn
[1] FUEL TUBE (240 mm)
[2] FUEL TUBE E
6) Connect the SE thermal valve heater wire 2P connector and set the 2P connector to the lower connector holderthen set the 14P connector to the upper connector holder