The Briggs and Stratton 31P777 is a 501 cc (30.6 cu·in) single-cylinder air-cooled four-stroke internal combustion gasoline engine, manufactured by Briggs and Stratton. The B&S 31P777 engine has an OHV (overhead) design and a vertical PTO shaft. This engine is equipped with float type carburetor, pulse type fuel pump and an electronic ignition Learn about the latest products by Briggs & Stratton, step-by-step instructions on how to locate your lawn mower engine model number, and more! Learn how to choose the best lawn mower oil type for your small engine & the oil capacity in which it should be filled with in this Briggs & Stratton FAQ! The B&S 252707 engine has an L-head (side valve) design and a vertical PTO shaft. This engine is equipped with float type carburetor and an transistor module ignition system. The B&S 252707 engine used a dual element air cleaner: cartridge and pre-cleaner. The cylinder bore is 87.30 mm (3.44 in) and the piston stroke is 66.7 mm (2.63 in). The lubrication system plays an integral role in maintaining engine performance. Briggs & Stratton® engines are designed to provide proper engine lubrication under a wide variety of operating conditions. Proper engine lubrication ensures engine reliability and longevity. Oil reduces engine temperature and friction between components, for Briggs & Stratton 305cc 1350 Series™ Horizontal Engine produces 13.5 ft.-lbs. Gross Torque to get the job done. Compact overhead valve design runs cooler and cleaner delivering more power, longer engine life and improved fuel economy. This engine has fast fuel delivery for One-Pull starts and smooth operation. ECOGARD SE-1 Small Engine Oil Filter for Mowers, Tractors, Lawn Equipment, Other Small Gas Engines Replaces BRIGGS-STRATTON 492932, 695396, 792326, 795137, FRAM PH8170, TECUMSEH 36563, WIX 57035 4.7 out of 5 stars 223 Get more detailed information on what you can expect from Vanguard® and our BIG BLOCK™ V-Twin engines by downloading our literature here. Learn about the Vanguard® 35.0 Gross HP* Big Block V-Twin Horizontal Shaft engine including Features, Specs and Options. Fortunately, there’s no need to go through this process alone; you can use this Honda lawn mower oil capacity chart to find out everything you need to know. #. Preview. Product. Price. 1. Honda 08213-10W30 Oil – 12 oz. $7.71. Buy on Amazon. Eagce.