Restore function to your Alpha I water pump For 50 years Sierra has been producing parts engineered to meet or exceed the specifications of marine engine manufacturers and has gained the confidence of engine manufacturers and boat builders to a point of supplying them with OEM parts. Boaters and technicians can be assured a Sierra part will fit right the first time and restore function to OEM specifications. Sierra packages their water pump kits to make the task of rebuilding a water pump quick and easy. The kit comes complete with all the necessary replacement parts and gaskets so you dont have to waste time hunting down each individual O-ring or gaskes. To simplify servicing an Alpha I water pump, look no further than a complete Sierra pump kit Key Features Engineered to meet or exceed OEM specifications Kit is complete with necessary impeller, bushings, water pump housing and base, gaskets, seals, O-rings, and bushings. Fits Alpha I drives with serial numbers between 6854393-0D469858Replaces GLM p/n 12120 and Mallory p/n 9-48307 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.