1998 Mercury 9.9/15HP 4-stroke outboards factory service manual, Page 279Get this manual
NON BIGFOOT GEAR HOUSING
IMPORTANT: Verify seal is not pushed out of position when water tube is installed4Slide water pump base with shift shaft down drive shaftAlign water tube with seal in housing while seating water pump base
a-Shift Shaft b-Shift Cam (POSITION AS SHOWN) c-Pump Base d-Water Tube e-Seal
5Apply 2-4-C wTeflon to I.Dand O.Dof shift shaft quad ringSeat quad ring in pump base6Apply Loctite 271 to bolt threads and secure pump base to housing with bolt and washerTorque bolt to 50 lb-in(5.6 Nm)7Install gasket and face plate95