Mercury Mariner 4 and 5HP 4-Stroke Outboards Service Shop Manual 1999, Page 208Get this manual
GEAR HOUSING
7Lubricate drive pin (a) with 2-4-C wfTeflon Marine Lubricant and place into flat of shaft as shownIn stall water pump impeller (b) over drive pin
H 95 D 2-4-C With Teflon (92-825407A12)
8Applya light coat of 2-4-C wfTeflon Marine Lubricant to the inside of the water pump impeller insert9While rotati ng drive shaft clockwise, push down on water pump housing (b) to cove impeller guiding water pickup tube (c) into seal (d)10Secu re water pump housing to gear housing with four bolts (e) and washersTorque bolts to 70 Ib-in(8 Nm)