Honda Outboards BF40A/BF50A Service Manual, Page 310Get this manual
[1} VACUUM TUBE (3) (3.5 45 mm)
[24] AIR VENT TUBE (3) (4.5 93 mm)
[2] AIR VENT TUBE A
[3] TUBE CLIP B10 [23]
3-WAY JOINT (2)
[22] AIR VENT TUBE C
[5] VINYL TUBE (4.5 160 mm) (6] VACUUM TUBE (3.5 60 mm)
[21] AIR VENT TUBE [20] 3-WAY JOINT B
[7] FUEL TUBE F