How do you drain the oil in a Briggs and Stratton lawnmower?

After warming the engine.

1. Disconnect the spark plug wire

2. Clean around the dipstick/oil tube before removing

3. Tilt the mower to where the air filter side is up

4. scrap away any grass, that maybe caked around the drain plug

5. position news paper or cardboard and the drain pan under the drain plug

6. loosen the drain plug with a socket or wrench

7. tilt the mower over the drain pan and let drain

8. Tilt it back up and reinstall drain plug

9. if it has a oil filter replace now

10. refill oil to the proper level and reconnect the spark plug.