A simple, clean design built upon many of the same principles as the Walker original. Includes a powerful Briggs & Stratton 18HP Vanguard engine and a simplified drive train. Specifically designed to side discharge or mulch using gear-driven decks up to 56â€. Key Specs: 18-HP Briggs & Stratton Vanguard twin-cylinder engine Independent HydroGear® transaxles Remote air intake for increased engine life Belt tightener clutch/band brake Keyed PTO drive shaft Full size garden tractor battery 2.8 gallon fuel tank