Honda B75 Twin and B75K1 Outboard Motors Manual., Page 23Get this manual
-3 Install the pump impeller on the pinion shaft, and then the impeller housing on the shaft shown in the figure and move the housing in the direction of so that the impeller blades will be facing the proper directionF 40
Impeller
housing
Fill the lower unit with standardSAE outboard motor gear oil through the oil hole until the oil emerges from the level bolt holeOil capacity 0.151 (0.32US 026 Imppt)F 41bolt hole oil filler hole l