The water pump enables the boat to use the water where the boat is floating in. Either salt water or fresh water are both good to use to cool the engine. The impeller pressurizes the water to allow to circulate. 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. The water pump is located on the side of the engine connected to the belts. If you are hearing weird noises from the water pump, engine is overheating the pump impeller maybe broken and the housing is scored inside. This is a complete repair kit manufactured by AA Ignition and includes a water pump impeller, impeller gaskets, housing, seal, keystone, plate, and O-rings. Fits The Following Engines: 200, 225, 250, 300 HP, 3.0L Alpha One Gen II stern drives from s/n D469859 and above Replaces part numbers: 817275K05, 817275Q05, 817275Q4, 817275T4, 817275A4, 18-3147, 9-48315, 12414 This water pump impeller kit is NOT a genuine part, Associated vehicle models are registered trademarks of their respective owners. These trademarks and part numbers are used in this listing only to identify the vehicles this water pump impeller kit fits. AA Ignition is a registered trade mark of GWA Auto Parts Inc.
