This blower's comfortable and ergonomic design lets you take care of big jobs with little effort. The fully tensioned multi-material suspension system distributes weight evenly and comfortably between shoulders and hips. The powerful 27cc Troy-Bilt 2-cycle engine generates up to 445 CFM at 145 MPH without the need to mix gas and oil. Ergonomic tube-mounted throttle lever for easy operation. Spring-Assist technology for easy starts. Use one of Troy-Bilt's JumpStart engine starters.