- Applicable model: This premium outboard ignition coil is a direct replacement for Tohatsu 2-Stroke 18HP outboard motors, and is compatible with 9.9 to 15HP. Before purchase, verify your engine specifications to ensure compatibility and minimize returns. Designed to meet OEM standards for seamless integration and to restore optimal performance. - Enhanced performance: Delivers a consistent, powerful spark energy to improve combustion quality, boosting engine responsiveness, smoother acceleration, and higher overall power output. Reliable ignition under demanding marine conditions, whether in chop or steady cruising. - Premium material: Marine-grade construction designed to resist salt water, UV rays, and extreme temperatures. A robust housing protects internal components from debris and harsh environments, delivering durable performance for anglers, boaters, and marine enthusiasts. - Efficient: Improves starting and reduces misfires by optimizing spark timing and intensity. Reduces fuel waste and emissions while maximizing engine efficiency, resulting in a stable idle, quicker throttle response, and smoother operation for recreational and professional marine use. - Use scenarios: - Replacing a worn coil on a Tohatsu 18HP to restore OEM performance for family boating and day trips. - Upgrading a 9.9-15HP engine to improve starting reliability and throttle response during coastal fishing or river trolling. - Providing dependable ignition in rough seas or long-range runs where consistent spark is critical.