Mercury - Champion L82C Spark Plug Ignition Component Copper Core & Ceramic Part Number 896323. Overview. There's a steady kind of confidence that comes from an engine that fires up cleanly every time you turn the key. The Champion L82C Spark Plug, sold under the Quicksilver name, brings that familiar ease back to your Mercury Marine engine. It's one of those simple parts that quietly shapes the entire boating experience the smooth idle as you ease out of the marina, the crisp response when you