Power Blowers   ECHO’S Biggest and Baddest Blower! The ECHO PB-751 Power Blower features the powerful and fuel-efficient Power Boost™ engine, Posi-loc™ secure pipe connection system, comfortable backrest with padded shoulder straps and a whopping 620 cfm air volume and 205 mph air velocity at the pipe. This makes the PB-751 the best heavy-duty choice in power, features and value. PB-250 PB-255 PB-265L PB-410 PB-460LN PB-500 PB-620H PB-620ST PB-770