Start the boating season off right with a freshly serviced water pump. Having a properly functioning water pump on opening day will pay dividends later when the sun is out and the fish are biting. Sierra water pump kits are designed and packaged to make sourcing parts for a water pump service easy. Each kit includes everything needed to restore the water pump and eliminates the time and hassle of researching and sourcing individual parts. Invest early in this years boating season by servicing the water pump and capitalize throughout the season with more trouble-free time spent on the water. Key Features Engineered to meet or exceed OEM specifications Kit includes; water pump base and housing, impeller housing, impeller, impeller plate, water tube guide, seals, gaskets and O-rings Inclusive kit eliminates time spent sourcing individual parts Replaces Mercury Marine p/n 46-70941A3 Compatible with 1 cylinder O/B's with a .456" I.D. water impeller 4hp: 1980—1986 45 (4.5hp): 1975—1979 4.5hp: 1980—1986 7.5hp: 1979—1985 9.8hp: 1979—1985 The Sierra Engine Parts Selector In addition to water pump kits, we offer a wide variety of other engine parts manufactured by Sierra. To see if we have the part you need, see ourEngine Parts Selector, where you can search by engine make, serial number and model or year of manufacture.