How do you change the oil on a cub cadet with a SR 621 Kawasaki engine?

To change the oil on a Cub Cadet with a SR 621 Kawasaki engine, first, ensure the engine is off and cool. Remove the oil drain plug located at the bottom of the engine and let the old oil drain into a suitable container. Replace the drain plug, then remove the oil fill cap and pour in the new oil, using the recommended type (usually 10W-30) and checking the dipstick to ensure the correct level. Finally, run the engine for a few minutes and check for leaks before disposing of the old oil properly.