- Compatible Models: Designed for 2-stroke outboard motors with 9.9 HP and 15 HP, this product fits multiple part numbers including 6B4-85550-01, 6B4-85550, 6B4-85550-00, and 6B4-85550-00-00, providing versatile options for your engine needs. - OEM Compatibility: This component seamlessly integrates with the flywheel and rotor parts of the 6B4-85550 series, ensuring your motor's starting system remains stable and efficient. - Precise Design: The well-thought-out design guarantees accurate alignment between the flywheel and motor components, enhancing starting performance and overall engine efficiency. - Single Unit Supply: Each package includes one flywheel rotor assembly, perfect for individual replacement needs. Installation is straightforward, making it easy to enhance your motor's performance without hassle. - Durable for Marine Use: Specifically engineered for marine environments, this product boasts corrosion resistance, making it ideal for long-term use in saltwater applications. Use Scenarios: 1. Upgrade your boat’s 9.9 HP or 15 HP outboard motor with this reliable flywheel rotor to ensure quick starts and smooth operation during your fishing trips. 2. Perfect for boat maintenance and repairs, this rotor assembly allows for easy replacement, helping you get back on the water faster. 3. Ideal for boaters who frequently navigate coastal waters, ensuring that your motor remains functional and efficient despite exposure to harsh marine conditions.