Mercury Mariner 4, 5 102CC Sail 1990 Outboard Service Shop Manual, Page 94Get this manual

5Remove water pickup seal Cal
7Remove insert (a)
6Remove water pump impeller (a)
Water Pump Base and Shift Shaft

• ATV
• Jet Ski
• Outboard Motors
• Personal Watercraft
• Snowmobiles
• Stern Drives