The FWD THRUST WASHER (990581) is a high-quality propeller accessory. It is located on the shaft in front of the boat propeller. It is designed with a smaller diameter projecting inner shoulder that tucks within the front of the propeller, centering and securing the propeller's front. Key Features: Top-quality forward thrust washer 100% brand new and made with the finest quality materials available in the industry and with zero defects Stops boat propellers from sliding forward on the prop shaft while being run in forwarding gear Centers and secures the front Built to perform Compact. Easy to store, carry and install. Quick and easy installation Designed to provide maximum convenience and comfort It has been proven and tested for dependability to ensure it fulfills our quality standards throughout the manufacturing process Approved marine-grade product Specifications: Brand: Michigan Wheel Condition: Brand New Item Number: 990581 Weight: 1.00 LBS Note: For marine applications For Honda 115-250HP Outboards - 4 3/4" Gearcase (Thru Hub Exhaust and 15 Tooth Spline)