Impeller 389589 777129 18-3055 for Johnson Evinrude OMC BRP 2-stroke 40HP 45HP 50HP 55HP 60HP Outboard Motor Number of Blades: 6, Net Weight: 57g Height: 21.91mm External Impeller Overall Diameter: 69.81mm Internal Shaft Insert Diameter: 16.03mm Brass Hub A External Impeller Overall Diameter: 69.81mm B Height: 21.91mm C Internal Shaft Insert Diameter: 16.03mm Brass Hub Number of Blades: 6, Net Weight: 57g