Echo Power Equipment PB-7910T The ECHO X Series PB-7910T expands ECHO’s lineup of commercial-grade high-performance backpack blowers by providing higher power at a lower price point than competitive models. It features an advanced 79.9cc 2-stroke engine making it the most powerful blower on the market under $600 MSRP. TOP FEATURES 79.9 cc professional-grade, 2-stroke engine 40N of blowing force Padded shoulder straps and backrest