Replace your propeller housing with Turning Point's 11500100 Master Guard Hub System Installation Kit #501 with 15-Tooth Spline Hub. This kit is compatible with Hustler and Express Series Propellers for select Force, Honda, and Suzuki & Johnson 40-150hp 15-spline shaft engines with a 4. 25" gear case. It is also compatible with Hustler and Express Series Propellers for select Mercury & Mariner and Mercruiser 90-300+hp 15-spline shaft engines with a 4. 75" gear case. Turning Point is the only company to offer Master Guard Installation kits and prop housings for 6-300+hp engines with a Lifetime Hub. Boaters save up to 38% when buying a replacement propeller housing. Master Guard hubs are Re-useable most of the time after a prop strike, and if not. These hubs offer enhanced lower unit protection. Turning Point's Master Guard Hubs are engineered to withstand typical wear and tear over time without risk of spinning or failure under normal operational use. Turning Point's unique patented one piece hub with glass filled nylon over durable marine bronze splines eliminates failures commonly seen in multi-part "sleeve and spline" designs, and pressed-in rubber hub systems. Covered by US Patent #6, 471, 481, #6, 685, 432, #7, 717, 678 and worldwide patents with additional patents pending. Refer to manufacturer recommendations to ensure a proper fit before purchasing.