How do I change the engine oil in the Craftsman M220?

Ensure the engine is not operating and is on a level surface. Disconnect the spark plug wire. Remove the dipstick and carefully tip the engine toward the dipstick side to drain the old oil into a suitable container. Tip the engine back to level and refill with the appropriate oil to the top marking on the dipstick (do not overfill). Reinsert and tighten the dipstick securely.