Use these high-quality spark plugs to prevent jittering and rough sounds and to keep your boat performing at its best. The DPR7EA-9 SPARK PLUG (86-5129) features a five-rib insulator design to prevent flashover. It is made with corrosion-resistant plating to ensure ease of installation and removal. The DPR7EA-9 SPARK PLUG (86-5129) has cold-rolled threads that prevent damage to the cylinder head. The NGK's triple gasket sealing process prevents gas leakage past the shell. It has a solid copper core that provides superior heat dissipation, conductivity, and a broader heat range. This spark plug is also made with a three-step trivalent plating process that utilizes silver chromate and zinc to ensure maximum corrosion resistance. Key Features: Features a five-rib insulator design to prevent flashover It is made with corrosion-resistant plating It has cold-rolled threads that prevent damage to the cylinder head It has a solid copper core that provides superior heat dissipation, conductivity, and a broader heat range Specifications: Brand: Autowares SKU: 86-5129 UPC: 087295051290 Weight: 0.15 LBS