Upgrade your Mercury 8 HP and 9.9 HP 4-stroke engine with the Sierra International Timing Belt (Part Number: 18-15149). This high-quality timing belt is designed for optimal performance and durability, ensuring your engine runs smoothly and efficiently. Crafted with precision, it provides a reliable connection between the crankshaft and camshaft, maintaining proper timing for peak engine performance. Easy to install, this timing belt is an essential component for maintenance or repair, helping to extend the life of your engine. Trust Sierra for dependable marine parts that keep you on the water!