1984-1986 Mercury Force 9.9 and 15HP Outboards Service Manual, Page 70Get this manual
11 Carefully check lowe gear housing bore for cracks, corrosionand burrs Remove burrs; superficial corrosion may be permissable if not on sealing surfaceChecked hous ing must be replaced 12Remove gear housing gasketARemove old sealant and gasket pieces from both uppe and lower gear ho usingsurfaces of housings with
CPosition new seal at seal bore so raised head around shift rod hole in seal is toward motor legDWith seal installer (Special Tool NoT 8953) drive seal in until it is flush ith bottom of seal bore hamfer3Remove and replace driveshaft seal from upper gear housing bore as follows: APry seal ut of bore with screwdriver
BClean gasket solvent
Inspection and RepairUpper Ge.r Housing
CAUTION
Be ver carefu not to scratch boreBApply grease to seal ing lips of new seal CPlace seal on installation tool so that major sealing lip ith garter spring is against shoulder of tool (Special Tool NoT 2907)
Bearing below upper driveshaft seal can not be replaced individually1Inspect hous ing lor deterioration2Clean water inlets3Inspect housing for cracks or other damageInspection and RepairRemove and Replace Seals