Champion RS9YC Copper Plus Marine Spark Plug
Champion marine spark plugs are quality OEM replacements. The Champion RS9YC 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.
- Copper Plus for dependable performance
- Copper core electrode allows for accurate control of heat range for longer life
- Patented TinTac and ULTRASEAL coated shell for maximum corrosion resistance
- Patented SAC-9 semiconductor for maximum EMI & RFI suppression.
Built to ISO and SAE standards for proven performance.
Champion Spark Plug # 304