If you own a lawn mower, you likely know that you have spark plugs in the engine. These spark plugs need to be changed occasionally as routine maintenance! However, if you find yourself asking what a spark plug actually is, don’t worry, you aren’t alone. A lot of people know very little about their vehicles. The good news is that, since you are reading this, you are seeking to learn more. What Is a Spark Plug? What Does It Do? As you may know, your engine moves the wheels by…