Yamaha, in collaboration with Roush Industries and Regulator Marine, is pioneering the development of the world's first hydrogen-combustion outboard engine for boats to promote greener and more sustainable boating practices. The project aims to support Yamaha's ambitious goal of achieving carbon neutrality by 2050 through a blend of electric, alternative fuels, and hydrogen technology. A key milestone was achieved when a specially modified Regulator Marine 26XO boat was successfully filled with hydrogen for the first time, powered by a 450hp XTO outboard engine running on gaseous hydrogen. Safety is a top priority, with standard hydrogen refueling connectors, smart monitoring systems, and special ventilation to ensure safe hydrogen usage on the boat. The project faces challenges such as the space limitations of current cylindrical hydrogen tanks and the need for more efficient tank alternatives to maximize hydrogen storage. Despite these challenges, Yamaha is determined to push through with the support of partners like Roush and Regulator Marine. The team is focused on continuous improvement, safety testing, and enhancing the boat's performance, aiming to make hydrogen refueling faster and more convenient. Yamaha's acquisition of electric outboard maker Torqeedo underscores their commitment to exploring various clean marine propulsion technologies. Yamaha's President of the U.S. Marine Business Unit, Ben Speciale, expresses optimism about hydrogen's future in the marine industry and emphasizes the importance of a multi-technology approach to developing cleaner products. The project signifies a step towards redefining marine propulsion with safe, practical, and sustainable solutions. The collaboration between Yamaha, Roush Industries, and Regulator Marine shows real progress towards a cleaner marine industry future, potentially transforming the game for boating as a whole.