A maintenance routine that includes servicing the spark plugs, air filter and engine oil helps keep your lawn mower running ...

Though small, spark plugs play an important role in getting your vehicle started and keeping it running—so when they’re past their prime, you’re going to want to replace them.

Your car's spark plugs aren't something you typically think about during regular maintenance, but they do need to be changed. How often should you do it?

Just like cars, lawn mower engines need their spark plugs changed on a regular basis. How often should you swap the old ones out for new ones?