Looking for Answers about Husqvarna Zero-Turn Mower - 540cc Briggs & Stratton Engine, 46in. Deck, Model# RZ4621?

Husqvarnas Residential-Series Zero-Turn Mower offers all the maneuverability, efficiency and convenience of a professional mower in a package perfect for any homeowner. Expect true zero-turn mower performance with twin maintenance-free integrated transmissions, heavy-duty front casters and a rugged steel tube frame. Conveniently placed controls, foam-padded steering levers and an adjustable seat make this mower easy and enjoyable to use. U.S.A. Engine: Briggs & Stratton, HP: 21, Engine Displacement (cc): 540, Engine Model: Endurance series, Cutting Width (in.): 46, Cutting Height (in.): 1 1/2-4 1/2, Cutting Styles: Mulch, rear bag, side discharge, Start Type: Key, Transmission: Hydrostatic, Blade Engage Control: Manual, Deck Lift: Manual, hand-operated, Turning Radius (in.): 0, Blades (qty.): 2, Fuel Capacity (gal.): 3 1/2, Forward Speeds: Variable, Reverse Speeds: Variable, Max. Forward Speed (MPH): 6 1/2, Max. Reverse Speed (MPH): 3 1/2, Frame Construction: Welded steel, Deck Construction: Stamped steel, Brakes: Yes, Front Tire Size (in.): 11 x 4-5, Rear Tire Size (in.): 18 x 8.5-8, Cooling: Air, Folding Armrests: No, Dimensions L x W x H (in.): 75 x 57 x 40  Durable 540cc Briggs & Stratton Endurance series engine for dependable starts and the power you need to get the job done Twin maintenance-free integrated transmissions for true zero-turn performance 10-gauge Stamped steel deck with high-performance air induction technology improves airflow and ensures a clean, consistent cut  Rugged frame and casters for durability and reduced chassis flex Ergonomic design includes a comfortable adjustable seat that provides a clear overview of the working area and angled steering levers Side-mounted control panel Deck has a garden hose port for easy underside cleaning Easy to maintain with easy access service points for oil and filter, hydraulic drive system, electrical system and battery Hour meter with service reminder helps keep track of maintenance  Adjustable tracking can be fine tuned without tools