805536A2 U-Joint Cross and Bearing for Mercruiser Alpha One Gen 2 Bravo | JLM Marine

U-Joint Cross and Bearing for Mercruiser Alpha One Gen 2 & Bravo

This U-Joint Cross and Bearing assembly is designed for Mercruiser Alpha One Gen 2 stern drives. It provides reliable power transmission between the gimbal housing and the upper drive unit, ensuring smooth operation under demanding marine conditions.

This component directly replaces OEM part numbers 8055361, 805536A1, and 805536A2, as well as Sierra 18-2097. It is compatible with Alpha One Gen 2 units manufactured from 1991 through current production years.

• Includes complete U-Joint assembly with bearing cups and retaining clips
• Direct replacement for multiple OEM and aftermarket part numbers
• Fits 1991-UP Alpha One Gen 2 stern drives

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below. For Mercury owners, here's a guide to help you identify your engine's serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.

Technical Specifications

Package Contents

This package includes the following components:

• 1 × U-Joint Cross and Bearing (805536A2)
• 4 × Retaining Clips

Installation Guide

1. Disconnect the battery and raise the stern drive to the full up position for safe access.
2. Remove the gimbal housing retaining bolts and carefully separate the drive unit from the gimbal housing.
3. Mark the orientation of the old U-joint before removal to ensure correct reassembly. Remove the retaining clips from the bearing cups using snap-ring pliers.
4. Tap out the old bearing cups using a soft mallet or press tool, taking care not to damage the yoke.
5. Clean the yoke bores thoroughly to remove old grease, debris, or corrosion.
6. Install the new U-joint cross into the yoke, aligning it with your orientation marks.
7. Press or tap the new bearing cups into place, ensuring they seat fully and evenly in the yoke bores.
8. Install the retaining clips into the grooves on each bearing cup, confirming they are fully seated.
9. Apply marine-grade grease to the U-joint if a grease fitting is present.
10. Reattach the drive unit to the gimbal housing, aligning all mounting points carefully.
11. Torque all retaining bolts to manufacturer specifications in a cross-pattern to ensure even pressure.
12. Reconnect the battery, lower the drive, and test for smooth operation and any unusual vibration or noise.

Troubleshooting & FAQ

Q: How do I know if my U-joint needs replacement?
A: Common signs include clunking or knocking sounds during shifting, excessive vibration at certain RPMs, difficulty shifting gears, or visible wear and corrosion on the U-joint components during inspection.

Q: How do I confirm this U-joint fits my stern drive?
A: Verify your stern drive serial number falls within the ranges listed in the compatibility table (1991-UP Alpha One Gen 2, serial 0D469859 and later). Cross-reference your original part number with 8055361, 805536A1, or 805536A2.

Q: Can I install this U-joint myself or do I need a professional?
A: While experienced DIYers with proper tools can complete this installation, professional installation is recommended. The job requires separating the stern drive from the gimbal housing and precise alignment during reassembly.

Q: How often should I inspect or replace the U-joint?
A: Inspect the U-joint annually or every 100 hours of operation as part of routine stern drive maintenance. Replace immediately if you notice play, corrosion, or damage, even if it hasn't reached the recommended interval.

Q: Does this kit include all the clips I need?
A: Yes, this package includes all four retaining clips required for a complete installation. Ensure old clips are fully removed before installing the new ones.

Q: Is this an OEM or aftermarket part?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.