Water Jet Propulsion - Competition for Propellers?

The increasing acceptance of water jet propulsion as an alternative to propeller drive in recreational size boats is evaluated on the basis of advantages and disadvantages to the consumer. Comparative performance data for water jet and inboard-outboard propulsion units powered by identical engines installed in identical boats are presented. These include data on fuel mileage, speed, and acceleration with various loads, engine rpm versus boat speed, and horsepower requirements.