Industrial 817275A4 Water Pump Assembly Kit Unit

MerCruiser OEM 817275A4 Water Pump Rebuild Kit is an authentic factory-part package designed to restore the water-pump assembly on MerCruiser Alpha One Gen II outboards and other 3.0L Mercury/Mercury Marine engines. The complete kit includes the impeller plus upper and lower housings, face plate and gasket, O-ring, seal face, carrier oil seal, impeller key, and gaskets, providing all components needed for a full rebuild. It is specified for Mercury 225/250 HP 3.0L carbureted/EFI/DFI engines from 1994 to 1998, with compatibility listed for the Mercury 200 HP 3.0L EFI/DFI and the 300 HP 3.0L 300X/300Xs applications, and it fits MerCruiser Alpha One Gen 2 units (serials around 0D469859+). Replacing worn impeller and seals with this kit restores proper cooling flow and reliable operation of the water pump, helping prevent overheating and maintain engine performance.