This valve adjustment procedure is for the Briggs and Stratton single OHV model with overhead valves. The OHV model came in the twin-cylinder engine as well, and both are used in bigger equipment like garden tractors, riding lawnmowers and generator sets. Instructions 1. Adjusting The Valves o 1 Before dismantling your engine, remove the spark How To Locate Your Riding Mower. Engine Model Number. Knowing the 10 character model number of your Briggs & Stratton engine will make it easy to order maintenance or repair parts either online or from your local dealer. The following is an example of what the engine model number looks like: Please Note: Only the first 10 characters of your CARB Compliant Purge Ports. CARB Compliant 6.95 qt. Fuel Tank (H/S Only) EPA/CARB Certified Propane Kit from PPS. Spline Crankshaft. Rewind Start (No engine battery needed) Idle Down. Variable Speed Throttle. Remote Speed Option. Engine Mounted Choke and Throttle Control. The Briggs and Stratton 31P977 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 31P977 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 The Briggs and Stratton 28N707 is a 465 cc (28.38 cu·in) single-cylinder air-cooled four-stroke internal combustion gasoline engine, manufactured by Briggs and Stratton. The B&S 28N707 engine has an OHV (overhed valve) design and a vertical PTO shaft. This engine is equipped with float type carburetor and an electronic ignition system.

Step 1: Clip one end of the spark tester (service part number 19368) to the ignition cable and the other grounded to the cylinder head as shown below. Step 2: Spin the flywheel rapidly (at least 350 RPM) and watch for spark in the tester window. If the spark jumps the tester gap, your ignition coil is working fine.

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briggs and stratton engine specs chart pdf