1、PART NUMBER: Replacing manufacturer part number for reference are 835257K1, 835257Q1. Please check the part numbers whether it suits your vehicle before purchasing. 2、STRONG COPATIBILITY: Fit for 60‑300HP,15 spline, for MerCruiser 120‑375hp Alpha and Bravo One Sterndrives, for Mariner 135‑250 HP, for Verado 200‑300 HP, etc. 3、IMPACT PROTECTION: The prop hub kit hub system acts as a buffer, protecting the drivetrain from most forms of impact. This ensures that your drivetrain remains in optimal condition for longer, reducing the need for frequent maintenance or repairs. 4、NOISE REDUCTION: The hub kit helps to prevent shift noise and propeller chatter, allowing for a quieter, smoother operation. This creates a more pleasant boating experience and causes less disturbance to the surrounding environment. 5、EASY OPERATION: Designed specifically for outboard and sterndrive engines. The kit tool simplifies the connection between the engine and propeller, making assembly and disassembly easier.