Heavy Duty U-Joint Assembly – Fits MerCruiser Alpha/Bravo (Replaces 75832A3, 758321, 75832T1)

Heavy Duty U-Joint Assembly – Fits MerCruiser Alpha/Bravo (Replaces 75832A3, 758321, 75832T1)

This heavy-duty universal joint assembly is designed as a direct replacement for MerCruiser Alpha One (Gen I and II), Alpha One SS, and Bravo stern drives. It provides a robust, balanced connection for reliable driveline performance.

This assembly replaces a wide range of original equipment and aftermarket part numbers, ensuring broad compatibility across MerCruiser, OMC, and Volvo Penta models.

• Installation: Designed for direct replacement of the original U-Joints.
• Included Fittings: Comes with both straight and 90° grease fittings for flexible maintenance.
• Package Contents: Includes two U-joint assemblies for a complete drive shaft upgrade.

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 Johnson/Evinrude owners, here’s a guide to help you identify your engine’s serial/model: Johnson/Evinrude Serial Number Guide.

MerCruiser

Johnson/Evinrude (OMC)

Volvo Penta

Technical Specifications

Package Contents

• 2 x U-Joint Assemblies (Replaces OEM 75832A3, 758321, 75832T1)

Installation Guide

1. Safety First: Disconnect the battery and ensure the stern drive is safely secured before beginning work.
2. Remove the Drive Unit: Detach the stern drive assembly from the transom shield according to your manufacturer's service manual. This typically involves removing trim rams and main mounting nuts.
3. Access the U-Joints: Separate the upper and lower units to expose the drive shaft and the U-joint assembly.
4. Remove Old U-Joints: Carefully press out the old U-joint bearing caps and remove the cross assembly from the yokes. Clean the yoke bores thoroughly.
5. Install New U-Joints: Press the new bearing caps into the yokes, ensuring the needle bearings are correctly aligned. Install the new cross assembly and secure it with the provided clips.
6. Add Grease Fittings: Install the provided straight or 90° grease fittings as preferred.
7. Grease the Joints: Using a grease gun, fill the new U-joints with high-quality marine grease until you see fresh grease purging from all four seals.
8. Reassemble Drive: Reassemble the drive components in reverse order of disassembly, ensuring all bolts are torqued to spec.
9. Final Check: Once reassembled, rotate the shaft to check for smooth movement. Reconnect the battery and test operation in the water.

Troubleshooting & FAQ

How do I know if this U-Joint will fit my specific stern drive?

This assembly fits MerCruiser Alpha One (Gen I/II), Alpha SS, and Bravo drives, as well as select OMC and Volvo Penta models. The best way to confirm is to match your existing part number to the list in our "Part Number Cross-Reference" section. Please also review the compatible model tables to ensure it matches your drive's serial number range and year.

What are the common symptoms of a failing stern drive U-joint?

Common signs include a clunking or rattling noise when turning or trimming the drive, excessive vibration felt through the boat, or visible rust and looseness in the joint. Failure to replace a worn U-joint can lead to catastrophic damage to the gimbal bearing, yoke, and drive shaft.

How often should I inspect or replace my U-joints?

U-joints should be inspected annually as part of your regular drive service and greased at least once per season, or more frequently depending on use. There is no fixed replacement interval; they should be replaced when they show any signs of wear, looseness, or corrosion.

Is this an OEM part or an aftermarket equivalent?

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.

How fast do you ship and how much does it cost?

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.

What is your warranty and return policy?

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.