SouthMarine 47-862232A 2 47-862232 A 2 47-862232A2 18-3016 Water Pump Impeller for Mercury Mercruiser 4.3L 5.0L 5.7L 6.2L 8.1L sterndrive Engines Number of Blades: 8, Net Weight 96g, Double flat Drive Height: 50.60mm Outer Overall Impeller Diameter: 66.50mm Internal Hub Diameter (Double flat sides): 11.40mm Internal Hub Diameter (Non Double flat sides): 14.86mm A Outer Overall Impeller Diameter: 66.50mm B Height: 50.60mm C Internal Hub Diameter (Double flat sides): 11.40mm C Internal Hub Diameter (Non Double flat sides): 14.86mm Number of Blades: 8 Net Weight 96g Double flat Drive<span class="a-text-bold">  </span>