Briggs and Stratton 44Q977-0037-G5 HP Commercial Turf Series Crankshaft Engine br click here to buy Overhead valve design for cooler operation and longer valve life br Cyclonic air filter provides ultimate debris protection and lasts 2X longer than panel-style air cleaner systems br Full pressure lubrication with oil cooler and spin-on oil filter assures controlled lubrication for extended life br Buyer protection package provides two-year consumer warranty br Mechanical compression release for smooth quick starting