SPEEDWOW Water Pump Impeller Repair Kit, 853792A07 Water Pump Impeller Repair Kit for Mercury and Mariner 25-30 Hp 4-Stroke Outboards Replaces 853792A07

‎Water Pump Impeller

■Material: ‎Neoprene, Brass

■Model Type: Water Pump Impeller Repair Kit for Mercury

■OEM Part Number: 853792A07

➤Replaces for:

■Mercury Mariner Outboard Motors 853792A07

➤【Fitment】：

Fit for: Mercury 25-30hp 4-stroke outboards (s/n: 0R051710 and above).

➤How Does a Water Pump Work?

■The water pump ensures that enough coolant liquid is flowing around the cooling system and engine in order to remove sufficient heat to prevent the engine overheating. The higher the load on the engine, the more the pump will circulate in order to deal with the greater levels of heat produced as the engine works harder.

■Inside the pump is an impeller (which might be made of either metal or plastic) with blades that push the coolant through the pump and out around the engine. The impeller is then mounted on a shaft with a seal assembly supporting it and allowing it to work without being impeded in any way.

■The pump circulates coolant via centrifugal force – a belt attached to both the pump and the crankshaft keeps the pump spinning. If the engine overheats, it can break down completely and be extremely expensive to repair, which is why the pump is so important in getting the coolant to the places it needs to get to. Once it has circulated through the engine, the coolant goes to the radiator to be cooled down before returning to the pump to be circulated once more.