Mercury – Quicksilver Cross and Bearing Kit | Driveshaft U-Joint for MerCruiser Alpha One Gen II | 805536A2

Overview

When your sterndrive starts making noise or vibration, the problem often traces back to worn U-joints. The Mercury Marine 805536A2 Quicksilver Cross and Bearing Kit is the OEM solution for restoring smooth power transfer and dependable performance on MerCruiser Alpha One Gen II sterndrives (serial numbers OD870000–OM400411). Built with hardened steel and precision-ground bearings, this kit brings your drivetrain back to factory-level reliability — ensuring your boat runs quietly and efficiently on every trip.

Key Features

• Purpose: Replaces worn or damaged U-joints to restore smooth driveshaft operation.
• Construction: Made from hardened steel for strength, durability, and long service life.
• Design: Precision-machined bearings ensure smooth rotation under heavy load.
• Performance: Reduces vibration and drivetrain noise for a quieter, more efficient ride.
• Ease of Use: Direct OEM replacement for easy installation with standard tools.

Engine & Boat Compatibility

• MerCruiser Alpha One Gen II sterndrives
• Serial number range OD870000–OM400411

Performance & Real-World Benefits

The 805536A2 U-joint kit is designed to handle the torque, pressure, and vibration of marine propulsion without compromise. When U-joints wear out, they can cause rattling, vibration, or even driveline failure. Replacing them with this OEM kit restores solid, precise movement between your driveshaft and gimbal housing.

Each component in the kit — including the cross and four precision bearings — is built to endure high RPM operation and exposure to salt, heat, and water. Once installed, you’ll notice smoother engagement, reduced vibration, and quieter performance, especially at cruising speed.

Why Choose Mercury OEM

The Quicksilver 805536A2 is a genuine Mercury Marine kit, built to the exact same standards as the U-joints used in new MerCruiser drives. Aftermarket versions often use softer metals or imprecise bearings that wear out quickly, leading to premature failure.

Mercury’s OEM components are heat-treated, corrosion-resistant, and tested under marine conditions to ensure strength and reliability. It’s the same hardware used by certified Mercury technicians — made to keep your sterndrive running like new.

FAQ

Q1: What’s included in the kit?
The kit includes the driveshaft U-joint cross and four bearings for a complete replacement.

Q2: What drives does it fit?
It fits MerCruiser Alpha One Gen II sterndrives, serial numbers OD870000–OM400411.

Q3: What symptoms indicate it’s time to replace the U-joint?
Common signs include vibration, clunking noises, or visible rust/wear at the joint.

Q4: Is installation straightforward?
Yes — it’s a direct-fit OEM kit that installs with standard shop tools.

Q5: Why choose OEM instead of aftermarket?
Mercury’s OEM parts use marine-grade materials and tighter tolerances, ensuring longer life and smoother operation.