The TB310QS is driven by a 31-cubic-centimeter gas engine that's equipped with an easy-pull spring-assist starting system. The blower creates hurricane-force winds up to 165 miles per hour; that's powerful enough to blast away even damp, matted leaves. Flip the QuickShift lever to switch from blower mode to vacuum. The 13.5-pound unit features a mulching impeller blade that shreds leaves--reducing them at a 10-to-1 ratio--and shoots them into the convenient collection bag. The zippered cloth bag holds about 3/4 of a bushel, and it can be emptied without removing it from the blower. Besides clearing leaves from the lawn, the TB310QS can be used to remove debris from decks, patios and sidewalks. The powerful engine on this Troy-Bilt leaf blower/vacuum is rather loud, so it's advisable to wear hearing protection during use.