With so many options in the market, we've made it easy to find the best plug for you. SPARK PLUG CR6HSA (86-2983). These plugs are OE-approved standard spark plugs that provide dependable performance. 5 Rib insulator design prevents flashover and is corrosion-resistant plating for ease of installation and removal. Marine spark plugs are a critical component of your boat's engine since they accept high voltage electricity at one end and generate a spark at the other. This spark plug incorporates a copper core electrode for enhanced conductivity and heat regulation, resulting in long-lasting performance. Key Features: Genuine OEM replacement spark plug Threads that have been cold rolled - avoid cylinder head damage Triple gasket sealing reduces gas leaking beyond the shell. Solid Copper Core - better heat dissipation, conductivity, and temperature range 3 stage trivalent plating using silver chromate and zinc provides optimal corrosion resistance Specifications: Brand: Autowares SKU: 86-2983 UPC: 087295429839 Weight: 0.15 LBS Thread Diameter: 10mm Thread Pitch: 1.0mm Seat Type: Gasket Type: Standard Resistor: Yes