ECHO has the widest variety of emission compliant engines ever certified for EPA, CARB regulations and EU directives. ECHO has condensed the years of development in the USA into the trademarked Power Boost Tornado technology™, with a highly refined two-stroke engine design. This technology is now applied across the ECHO Power Tool range, with engines delivering more power, higher fuel efficiency and better engine lubrication, while improving combustion and reducing exhaust emissions.