What is the function of the impeller on a watercraft?

The impeller's primary function is to pump and force water under pressure through the steering nozzle, which is a critical component in the propulsion system of many watercraft, particularly jet boats. When the impeller spins, it creates a low-pressure area that draws water into the pump. This water is then expelled rapidly through the nozzle, producing thrust that propels the watercraft forward and allows for effective steering.

This mechanism is essential for maneuverability and speed, as the force of the water being pushed out creates the necessary propulsion to move the vessel through the water. Understanding how the impeller operates is crucial for anyone operating a watercraft to ensure it functions properly and safely.