What is an impeller on a boat?

An impeller on a boat is a crucial part of the water pump system that is responsible for circulating engine coolant to prevent overheating. It is typically made of rubber or plastic and consists of several curved blades or vanes that rotate to create a water flow. The impeller is driven by the engine and draws in water from the surrounding environment, which is then pushed through the cooling system to regulate the engine temperature.

It is important to regularly inspect and replace the impeller, as over time it can wear out, crack, or become damaged, leading to less efficient water circulation and potentially causing the engine to overheat. It is recommended to replace the impeller every 2-3 years, or sooner if signs of wear are apparent.

When replacing the impeller, it is crucial to ensure that the replacement part is the correct size and type for your specific engine model, as using an incorrect impeller can result in poor performance and engine damage. Additionally, proper installation and maintenance of the impeller and water pump system are essential for the overall health and longevity of your boat's engine.