The H2 hydrogen outboard is a derivative of Yamaha's XTO Offshore outboard engines. The XTO Offshore outboard's 5.6-liter V8 gasoline-engine produces up to 450 horsepower, making it one of the ...

Yamaha started with their largest offshore outboard, the XTO 450, and made some smart changes to handle hydrogen. They adjusted parts like the cylinder heads, fuel lines and injectors to work with ...

The Cost of Rebuilding an Outboard Motor. Look at how much a rebuilt engine costs compared to simply repairing or rebuilding what you have. A typical rebuilt midsize outboard motor from the 1980s to ...

Yamaha's World's First Hydrogen-Powered Outboard Engine. The prototype fuel system, engineered in partnership with Roush, draws upon the company's extensive experience in hydrogen systems ...

Yamaha's hydrogen-powered outboard engine, dubbed the H2, is part of a prototype project announced in December of 2023 that includes fuel system engineering by Roush CleanTech, part of the same ...