25HP, V-Twin Commercial Engine 12V Electric Start, Has Fuel Pump, HAS OIL Cooler & Oil FIlter 16A Alternator w Regulator. These engines are specially designed for zero turn mowers and other high debris applications to endure extended use in extreme conditions. Bore 3.12 in. Stroke 2.89 in. Oil Capacity 64 fl. MUFFLER IS NOT INCLUDED. Crankshaft, Drilled and Tapped 7/16-20 1/4-Sq. Keyway 3-5/32 Crank Length. HAS Fuel Pump and Oil Pump w FIlter. Patented 5-Step Debris Management System for. Extended durability under heavy debris conditions. Cyclonic air filter provides ultimate debris. Protection and lasts 2X longer than panel-style air. Increased cylinder block structure for added. Cooling fin inspection panels speed debris. Full pressure lubrication with spin-on oil filter. Assures controlled lubrication for extended. Briggs and Stratton Dealer.