Replacement: This aftermarket impeller replace Yamaha 4-stroke outboard motors Part No.: 68T-44352-00. Sierra 18-8910. Applications: Fits Yamaha 4-stroke Models: F6, F6ML, F6MS, F8, F8ML, F8MS, F6AM, F8CM, F8LM, F8L, F8S, F9.9, F9.9L, F9.9S. Also fit Chinese Hidea 4-stroke 6-8hp outboard motors: F6, F8, F9.9