Honda BF20A-BF25A, BF25D-BF30D Outboard Motors Shop Manual., Page 292Get this manual
Connect the 5.3 70 mm fuel tube to the ''e" marked fitting of the fuel pump, and the 5.3 55 mm fuel tube to the ''a" marked fitting of the fuel pump 5) Attach the throttle rod pivot to the throttle cam
Insert the two air vent tubes into the engine under case as shown