Mercruiser Alpha Gen 2 Complete Water Pump Upper Service Kit by Sierra. One piece stainless steel body and all parts in the picture. For: Alpha 1 Generation 2 Outdrives S/N D494569 and Above.Replaces OEM MerCrusier part number 817275Q05. The item "Sierra MerCruiser Alpha 1 Gen 2 Water Pump Impeller Repair Kit 817275Q05 18-3147" is in sale since Friday, February 10, 2017. This item is in the category "eBay Motors\Parts & Accessories\Boat Parts\Inboard Engines & Components\Other". The seller is "nuwavemarine" and is located in Woodbury, New Jersey. This item can be shipped to United States.