Mercury OEM Mercruiser Alpha One Gen II Water Pump Repair Kit 817275K05This genuine OEM MerCruiser water pump rebuild kit is for use with Alpha One Gen II Sterndrives. By repairing and maintaining your water pump you can ensure the flow rate your engine system. Mercury uses decades of knowledge to Fits: Alpha One Gen II drives Kit Contains Gaskets; O-Rings; Plates; Impeller; Key; Water Guide Fittings; Upper Housing; This kit contains all you need to maintain or repair your water pump with common tools