BRP 0502180 Spark Plug Champion QL77JC4BRP 0502180 spark plugs are quality OEM replacement engine parts. This BRP Spark Plug features a copper core electrode that provides increased conductivity and heat control for good overall wear. These marine spark plugs are designed to resist overheating under heavy engine loads. Resists fouling; Superior corrosion resistance; Dependable and proven performance; Increased conductivity and heat control for good overall wear; Interchangeable with: Chamption; QL77JC4;