L77JC4 Marine Spark Plugs 4 Pack - Compatible with Nissan NS 9.9B-40D, Compatible with Suzuki DT9.9-DT30C, Tohatsu M9.9D2-M40D2, Yamaha 150 Series - Replaces RS37YC for Outboard Motors

Perfect FitSpark plugs
Compatible with Nissan: NS 9.9B, NS 15B/D, NS 25C, NS 40D2;
Compatible with Suzuki: DT 9.9, DT15C, DT25C, DT30C;
Compatible with Tohatsu: M 9.9D 2, M15B, M25C4, M40D;
Compatible with Yamaha: 150, C150, V150TLR, SX150. For more information about the fit, please check the picture or detail page.; OE ReplacementDirect replacement for OE numbers L77JC4. These spark plugs meet or exceed OEM standards for form, fit, and function. Made from high-temperature resistant materials, they withstand extreme thermal stress, ensuring durability and reliability.; Pre-Gapped Spark PlugEach spark plug is pre-gapped to 0.7 mm ( 0.028 in), ensuring optimal ignition performance and hassle-free installation. For additional specifications such as thread size, hex size, and reach, please refer to the product images for complete details.; Iridium DesignCrafted with precious iridium metal, these spark plugs offer stronger ignition performance, faster cold starts. The wear-resistant design enhances fuel efficiency, reduces carbon buildup, and extends engine life. Ideal for use in automobiles, trucks, SUVs, motorcycles, marine engines, and industrial equipment, these spark plugs are engineered to maximize engine power and improve overall vehicle performance.; Customer Service & Quality AssuranceAt SYKRSS, we prioritize your satisfaction. If you encounter any issues with our iridium spark plugs, contact us directly, and we will respond within 24 hours.

Backed by a 1-year repair and rep