1. 【Basic Information】 Impeller Size: 6 1/8”, 3-Blade, Part No.1737, Medium Series. Polished stainless steel. Fits #1521 Flanged Liner & Wear Ring. Includes PART 1705 1/2 Round Tee Key. 2【Compatible with Multiple Brands and Models】 Fits Yamaha Mercury Tohatsu Honda Johnson and Suzuki, For specific compatibility details, please check the product description or compatibility chart. 3.【Polished Stainless Steel 】 Polished impellers with sharp edges optimize water flow by reducing turbulence, enabling the jet pump system to achieve superior acceleration 4.【Superior Performance】 Tests have shown that the polished impeller increases speed by 2-3 km/h compared to standard impellers, optimizing propulsion efficiency. If you need the most efficiency out of your jet then this is the product for you. 5.【Professional and High-Quality Service】 We specialize in manufacturing jet boat impellers and liners for small, medium, and large series, offering a full range of models to suit various needs. Renowned for their exceptional quality and reliability, our products are highly sought after by jet boat owners worldwide. The 1737 Medium Series Jet Boat Impeller is designed for high-performance jet boating, perfectly suited for 40-60HP engines. Constructed from **polished stainless steel**, this **6 1/8-inch impeller** offers exceptional durability and superior resistance to corrosion. Its advanced design ensures powerful acceleration and impressive speed, ideal for navigating medium-flow rivers and light rapids—perfect for adventure enthusiasts. Compatible with a wide range of brands and models, it works seamlessly with the **#1521 Flanged Liner & Wear Ring**, delivering exceptional and reliable performance.