This propulsion system, distinct from traditional propeller-driven outboards, uses an impeller housed within a duct to create a powerful jet of water for thrust. Rather than pushing against a propeller, the engine powers a pump that draws water in and expels it at high velocity, offering unique advantages in specific boating environments.
The inherent shallow-water capabilities of this technology make it highly desirable for navigating areas inaccessible to conventional outboards. The absence of a propeller significantly reduces the risk of damage from underwater obstacles and marine life. Furthermore, these systems often deliver excellent maneuverability and responsiveness, making them popular choices for activities like fishing and watersports in shallow or debris-filled waters. Historically, this technology has evolved from designs initially employed in personal watercraft, gradually adapting and improving for a broader range of boating applications.