Hydrogen V8 Outboard engine from Yamaha, storage and range calculations, challenges for practical use.

The use of hydrogen fuel in outboard engines faces several challenges. Hydrogen's low energy density by volume requires high-pressure storage tanks, adding weight and space constraints to small boats. Its highly flammable nature demands advanced safety measures, increasing costs. Hydrogen infrastructure, such as refueling stations, is limited, posing logistical hurdles for marine use. Additionally, adapting existing engine designs to efficiently burn hydrogen without compromising performance or durability requires significant research and development. The corrosive effects of hydrogen on materials and its compatibility with marine environments further complicate its adoption. Addressing these challenges is essential for hydrogen-powered outboards to become viable.