1983 Yamaha 30EN Outboards Service Manual, Page 116Get this manual
ASSEMBLING THE GEAR CASE UNIT After backlash adjustment, install the water pump1Install the two oil seals in the oil seal housing, one by one, and coat the lips with water resistant grease (Yamaha Grease A)Install the oil seal protector, install the gasket, outer plate cartrige, and gasket, and fit the woodruff key to the drive shaft NOTE: _
Be sure that the oil seal faces in the correct directionMount the impeller on the drive shaft so that the impeller key way fits over the drive shaft woodruff keyGive the impeller blades ight coat of grease