Yamaha - Spark Plug (NGK ILMAR7H9) - 94702-00447-00. Beneath every exhilarating ride lies a spark that ignites the engine's true potential. The Yamaha Spark Plug (NGK ILMAR7H9) delivers that dependable spark, engineered to handle both casual cruising and high-performance demands. Built with advanced electrode technology, it promotes consistent combustion for smooth acceleration-whether you're heading out on a relaxed weekend trip or pushing the limits on the open water.. Marine-grade construction equips this spark plug to withstand moisture, salt spray, and dramatic temperature shifts, giving it a clear advantage in challenging conditions. Corrosion-resistant materials and precise engineering come together to minimize misfires, maintain better fuel efficiency, and prolong overall engine life.. Long-Lasting Dependability: Cuts down on frequent replacements, saving time and hassle. Enhanced Throttle Response: Delivers quicker acceleration for a sharper, more responsive ride. Optimized Co