1OEM Part: Replacement for Tohatsu replacement for Nissan Outboard 3B2660210M, 3B2650211 M, replacement for Sierra 188920, replacement for Parsun Makara F804000200, etc. 2Great Fitment: The boat water pump impeller is a perfect replacement for Mariner Outboard Engines 8hp 4 Stroke standard gearcase from 2005 and 9.9hp 4 Stroke standard gearcase from 200 4Recommendation: Suggest replacing your flexible pump impellers at least once every year or sooner depending on the engine duty; always carrying spare impellers on board before boating activities. 5High Quality Materials: The heavy duty impeller is manufactured by premium hardened copper and neoprene rubber, conducive to water pump maintenance, reliable and long lasting to use. 3Purpose: The flexible 6 blades impeller is designed for marine water pumping such as engine cooling, water transfer, wash down and bilge water pumping purposes, suitable for fresh or sea water.