How do you set the timing on a Briggs Stratton 19.5 hp lawn tractor engine?

To set the timing on a Briggs & Stratton 19.5 hp lawn tractor engine, first ensure the engine is off and cool. Remove the crankcase cover and locate the timing marks on the flywheel and the engine block. Align the timing marks to the specified position, typically at TDC (top dead center) for the compression stroke. Finally, reassemble any removed parts and check the timing by starting the engine and listening for smooth operation.