A sport boat jet pump is a type of pump that is used to propel a sport boat, which is a type of small, agile watercraft that is designed for speed and maneuverability. The jet pump consists of an impeller and a jet nozzle, which work together to create the thrust needed to move the sport boat through the water.

The impeller is a mechanical device that is located inside the jet pump and is responsible for drawing in and accelerating the water. It consists of a series of vanes or blades arranged in a circular pattern around a central hub. As the impeller rotates, it creates a low pressure area at the center of the impeller, which causes water to be drawn in from the surrounding area. The water is then accelerated outwards towards the discharge side of the impeller, where it is directed through the jet nozzle.

The jet nozzle is a narrow, pointed opening located at the rear of the sport boat that is used to direct the water flow and create the thrust needed to move the boat through the water. It is typically adjustable, allowing the operator to control the direction and intensity of the water flow.

In general, sport boat jet pumps are designed to be compact, lightweight, and efficient, in order to maximize the performance and handling of the boat. They are typically powered by an internal combustion engine, which drives the impeller and generates the flow needed to propel the sport boat through the water.