The Champion Copper Plus 849C Small Engine Spark Plug helps you to get more life out of your equipment. It s sized and threaded for small engines such as those used in lawn mowers. This copper core spark plug is highly conductive to create consistent arcs for smooth starts and operation. The copper core center electrode allows for accurate control of heat range optimizing performance and longevity. It s built to both SAE and ISO standards to ensure dependability and durability.