Honda Outboards BF40A/BF50A Service Manual, Page 339Get this manual
BF40A-BF50A 2) Install the followingvacuum tube and dashpot check valve fuel tube clamp air vent tubes SE tube and tube clips- SE tube and tube clip 10
[2] SE TUBE (2)
[3] TUBE CLIP (4)
[4] AIR VENT TUBE 0