The easy to operate yet rugged propane-powered Powerstar Z1 with industrial components yields ultra long life and is the ultimate walk behind floor scrubber machine for your medium to larger sized facilities. You won't believe how much time and labor you save because of this machines unlimited run-time (no down time is required for recharging batteries), large 35 gallon tanks (require less frequent filling and dumping), quiet running water-cooled 437 cc Kawasaki engine, wide 33" cleaning path, and regenerative blower technology that provides four times the water pick-up of conventional battery-powered scrubbers . Propietary drive system provides extra smooth operation with no belts, no chains, and no adjustments. SafeSense Emissions Monitoring System, catalytic muffler, and adjustable brush/pad pressure are standard for safe operation and optimal flexibility in different applications.