Water Pump Impeller Kit - Compatible with Mercury Marine and Mercruiser - 1991-2021 - Replaces 817275Q05, 817275T4, 18-3147, 9-48315, 12414 - Alpha One Gen 2 Engines - Stern and Vazer Drives

Water Pump Impeller Kit - Compatible with Mercury Marine and Mercruiser - 1991-2021 - Replaces 817275Q05, 817275T4, 18-3147, 9-48315, 12414 - Alpha One Gen 2 Engines - Stern and Vazer Drives   Replacement Upper Water Pump Repair Kit - Enables the boat to use the water where the boat is floating in. The impeller pressurizes the water to allow to circulate. Compatible with Mercury Marine and Mercruiser - 200, 225, 250, 300 HP 3.0L | Alpha One Gen II outdrives/stern drives from serial number: D469859 and above |. Regular replacement is neccessary to avoid damaging the engine by overheating because of insufficient cooling or because of broken impeller parts being sent to the engine. Replaces Part# 817275K05 | 817275Q05 | 817275Q4 | 817275T4 | 817275A4 | 18-3147 | 9-48315 | 12414 |. The pump is located on the side of the engine connected to the belts. If you are hearing weird noises from the pump, engine is overheating the pump impeller maybe broken and the housing is scored inside.