The high torque gear case regulates the RPM to ensure you get clean cutting whether moving through short grass or tall, thick brush. High torque increases power to the equivalent of a 5cm³ larger engine. The 21.2cm³ engine at the heart of the SRM-237TES/U, like all ECHO engines, is manufactured in Japan to the highest possible standards. Featuring patented ES Start technology, it is easy starting, powerful, efficient and dependable. U handle brushcutters increase operator comfort by supporting the unit’s weight (with harness) and providing a consistent range of motion.