How do you change a spark plug on a lawn mower?

Changing Spark Plugs in Lawn Mowers, Snow Blowers & Equipment Find the right spark plug(s) & adjust gap settings. Disconnect the plug lead and remove with a spark plug socket. Replace with your new plug, taking care not to over-tighten (15 ft. lbs. / 180 in. lbs. (20.3 Nm)) and re-attach the spark plug lead. Click to see full answer. Moreover, how do I know if my lawn mower spark plug is bad? How To Tell If a Lawnmower Spark plug Is Bad Disconnect the spark plug wire. Remove the spark plug. Inspect the Electrode on the spark plug for damage. Determine the Condition of Electrode: Normal or is it Wet, Gas or Carbon fouled. Replace the spark plug if the electrode is worn or damaged or bad conditions exist. Similarly, how do you check a Briggs and Stratton spark plug? How To Tell if a Spark Plug is Bad Step 1- Disconnect the spark plug lead. Step 2- Remove the spark plug using a spark plug socket. Step 3- Inspect the spark plug for very stubborn deposits, or for cracked porcelain or electrodes that have been burned away. Step 4- Check the spark plug gap and adjust as necessary. In this manner, when should I change my lawn mower spark plug? Replace spark plugs as often as is recommended by the manufacturer. Change spark plugs at the beginning of every mowing season (in the spring) and/or every 100 hours of use. Use the same spark plugs recommended by the manufacturer of your lawn tractor or push mower. Are lawn mower spark plugs universal?The spark plugs in both types of engine work on the same basic principle. Some automotive and lawn mower spark plugs may be interchangeable, but many others are not because of physical differences.