This product is easy to install, which you can replace the damaged one by yourself.Complying with strict production standards, the water pump impeller has excellent performance.Made of the brass and rubber material, it is durable.The length of this product is 1.27cm, the outer impeller diameter is 6.934cm, the internal shaft Insert diameter is 1.097cm, its OE numbers are 277181, 434424, 18-3001.It is suitable for (Evinrude Johnson 2-stroke outboard motors) 3HP 1952-1978, 4HP 1969-1972, 4HP 1973-1983 (For water pumps using 1 water tube ,110 gearcase), 5HP 1965-1968, 5.5HP 1954-1964, 6HP 1952-1978, 7.5HP 1954-1958.Item Name: Water Pump ImpellerMaterial: Brass,RubberCompatible Models: for Evinrude JohnsonMagnetic: NoBlade Numbers: 6Size Details: Height: 1.27cm/0.5 (Approx.)Outer Impeller Diameter: 6.934cm/2.73 (Approx.)Internal Shaft Insert Diameter: 1.097cm/0.43 (Approx.)Notes:Before buying, please check carefully whether it is compatible with your replacement product to prevent mismatches later.Due to the light and screen setting difference, the items color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Water Pump Impeller When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please dont hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it