Mercury Mariner 4, 5 102CC Sail 1990 Outboard Service Shop Manual, Page 103Get this manual
Water Pump Base and Shift Shaft IMPORTANT: Seal should be installed flush with water pump base as shown 1Push new oil seat (a) into water pump base (b) using rod (el and mandrel (d) 2Lubri cate seal lip with 2-4-C Marine Lubricant
3Install ew water pump base gasket (a)