Center insert resists tearing to ensure performance.. The Blades Number of Impeller: 6; External Impeller Overall Diameter: 51mm / 2.01 inch; Internal Shaft Diameter: 18mm / 0.71 inch , Height: 18mm / 0.71 inch. Impeller fit for Yamaha 40hp 50hp 70hp. Impeller elastomers provide improved flexibility across Broad temperature ranges.. Designed for durability to provide higher flow rates and cooling flow to protect your engine..
