66.5 cc, 2-cycle engine. Commercial grade backpack blower with catalytic converter. Blower features electronic ignition and anti-vibration system to absorb engine vibration. Comfortable easy On/Off harness, quiet 94 dba noise level and fuel efficiency of up to 2 hours per tank of fuel make it a professionals or home owners dream. Noncarb compliant. Not for sale in California. 2 year commercial warranty.