Briggs Vanguard Engines Commercial-Grade Power The Briggs & Stratton® Vanguard® BIG BLOCK™ engine found on select Scag® mower models is a proven performer with power and reliability. Features include: V-Twin OHV technology. Dura-Bore cast-iron cylinder sleeve. Full-pressure lubrication with spin-on oil filter. Oil cooler. Advanced debris management. Centrally located oil pump and pickup. Heavy-duty cylinder and sump. High-efficiency head design. Dynamically balanced crankshaft. Industrial-grade solenoid shift starter. * Note: Engine specifications based upon manufacturer-supplied information. All specifications subject to change at any time without notice or obligation. Engine specifications may vary by model.