Troy-Bilt TB51BP gas backpack blower features a 51cc, full-crank 2-cycle engine and produces air speeds up to 220 MPH and 600 cubic feet per minute. A comfort harness with chest strap distributes weight evenly, while the padded shoulder straps provide increased comfort. SpringAssist technology allows for easier pull starts and a responsive trigger design on the variable speed throttle provides instant power. User friendly features enhance the design of the backpack blower, such as the ergonomic throttle handle and the anti-vibration mount.