Replace the impeller on a wide range of Mercury outboards 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 impellor kits make changing out an old or failed impellor easy. Each kit was packaged to provide simple out of the box installation and includes an impeller, the required gaskets, O-rings and a wear plate. This kit is compatible with a wide range of Mercury outboards; don t be alarmed if there are more parts in the package than your application needs. These kits are ideal for mobile repair technicians who service a variety of engines, but have limited space for parts.