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 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. 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. 5s: The heavy duty impeller is manufactured by premium hardened copper and neoprene rubber, conducive to water pump maintenance, reliable and long lasting to use. 1 x Water Pump Impeller Item Type: Water Pump ImpellerMaterial: Copper + NeopreneOEM: 3B2-65021-1, 3B2-65021-0 MReplacement for Tohatsu replacement for Nissan Outboard 3B2660210M, 3B2-65021-1 MReplacement for Sierra 18-8920Replacement for Mercruiser 47-8037481, 8037481Replacement for Parsun Makara F8-04000200Blades: 6Height: Approx. 18.50mm/ 0.7inOverall Diameter: Approx. 40.00mm/ 1.6inShaft Diameter: Approx. 11.50mm/ 0.5inFitment: Replacement for Mariner Outboard Engines 8hp 4 Stroke standard gearcase from 2005 Replacement for Mariner Outboard Engines 9.9hp 4 Stroke standard gearcase from 2005