1、OEM Number: Water pump impeller replace part number are 47 80395m, 646 44352 01. Please make sure the OEM number matches the part you are replacing. 2、High Compatibility: Marine impeller is replacement for Mariner 2 hp 2 stroke 1984‑1990, only fit for Mariner outboards with Serial Number 646 and 6A1. 3、Improved Efficiency: Effectively increase impeller conversion rate, providing a more powerful propulsion and better maneuverability for your boat. 4、Long Durability: The outboard impeller is made from premium metal and rubber materials, high strength and aging resistance ensure long lasting durability. 5、Stable Performance: Impeller is manufactured using advanced techniques and technologies, guaranteeing efficient performance, excellent driving force, and good maneuverability.