If your lawn mower runs on gas, then you've got a spark plug tucked inside the engine that plays a bigger role than you might think. Spark plugs are what fire up the engine in the first place. They ...

We may receive a commission on purchases made from links. It often starts the same way. You're halfway through the yard, the mower's humming along, and then out of nowhere, the engine sputters, chokes ...

A man changing the spark plug on a lawn mower - Fertnig/Getty Images If you own a gas-powered lawn mower, whether it is a compact push model or a giant zero-turn ride-on, there are a few key ...