Changing the oil in your lawnmower can be a do-it-yourself task that will save you some green in your wallet while providing the necessary mower care that keeps green on your lawn. Murray, which closed its operation in February 2005, manufactured mowers before 2005 under its own name. Briggs & Stratton bought the company name in 2005 and began manufacturing the mowers with the Briggs & Stratton engine. Performing maintenance on the Briggs & Stratton engine is an easy do-it-yourself task.
Warm the mower engine before changing the oil. Run the mower until the engine is warm. Remove the gas by continuing to run the mower until the tank runs dry. Remove the spark plug wire from the spark plug with a gloved hand. Grip the spark plug cord with your hand and wiggle it loose from the spark plug.
Tilt the mower onto its left side. Place the drain pan under the mower to catch the drained oil. Remove the drain plug from the bottom of the mower, near the base of the blade, with a wrench. Turn counterclockwise until loosened. Move the drain pan under the drain hole to prevent spills of oil. Allow the oil to drain until empty. Replace the drain plug and secure tightly with the wrench.
Turn the mower right side up. Remove the dipstick, located on top of the motor, from the engine. Pour new oil into the mower through the dipstick hole. Fill until the oil reaches the fill line on the dipstick, usually about 20 oz. Use oil recommended for your climate. Briggs & Stratton recommends using SEA 30 oil for temperatures above 40 degrees F. Synthetic 5W-30 oil is recommended for temperatures ranging from -20 degrees F to 120 degrees F.
Replace the spark plug wire onto the spark plug. Fill the gas tank with gasoline and the mower is ready for another lawn job.