For MerCruiser 11-52707A1 Prop Nut Tab Washer Kit Sterndrive Alpha One Bravo 1 2 3 Drives 11-52707A2 11-52707Q1 Sierra 18-3701 The Prop Nut Tab Washer Kit is designed for use with MerCruiser sterndrive systems, including models 11-52707A1, 11-52707A2, and 11-52707Q1.It is compatible with Alpha One (Gen1 and Gen2), Bravo 1, Bravo 2, Bravo 3, and Sierra 18-3701 drives.This kit supports various propeller setups, including those used on Mercruiser 4.3L engines and other Alpha One configurations.A prop nut tab washer kit consists of a tab washer and lock washer that work together to secure the propeller nut on the driveshaft.These components help prevent loosening caused by vibration and operational stress common in marine environments.The design ensures performance across repeated use and exposure to water and corrosion.Over time, engine vibration and torque can cause the propeller nut to back off.Without proper retention, this may lead to propeller slippage, increased vibration, misalignment, or damage to the driveshaft and related components.Installing a correctly sized tab washer and lock washer helps maintain secure fastening and supports consistent driveline.This kit fits standard Alpha One prop nut sizes and is suitable for routine maintenance or replacement during propeller servicing.It includes both the tab washer and lock washer needed for complete assembly.The materials are selected for and resistance to marine conditions.Common applications include recreational boats, fishing vessels, water sports craft, and commercial marine using compatible MerCruiser or Sierra sterndrive units.The kit is frequently used when maintaining or repairing Alpha One Gen2 propeller systems or replacing worn hardware on older Alpha One or Bravo drive models.Engineered for compatibility with specified MerCruiser and Sierra sterndrives, this washer kit supports long-term in aquatic environments.It provides a practical solution for securing the propeller assembly and contributes to overall system stability and function.