Champion RL87YC Marine Spark PlugChampion marine spark plugs are quality OEM replacements. The Champion RL87YC 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; Champion Spark Plug # 327Application: Tohatsu; M2.5A2 1 cyl. 2-Stroke 2.5HP 74.6cc; M3.5A2 1 cyl. 2-Stroke 3.5HP 74.6cc; M3.5B2 1 cyl. 2-Stroke 3.5HP 74.6cc; Volvo Penta; M20B; MB20A; MB20C;