How to Change a Lawn Mower Spark Plug
- 1
Locate your mower' s spark plug. With a socket wrench, remove the old spark plug. - 2
Refer to your mower' s owner manual to check the required gap measurement for your spark plug. Once you have determined the required gap, all you need to do is measure the gap on your new spark plug. Make adjustments in the gap to match the manufacturers specifications for your specific mower. - 3). Once you have altered or creating the proper gap in the spark plug, simply screw in the new plug. Be careful not to screw in the spark plug too tight.