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) is backordered and will ship as soon as it is back in stock.
Couldn't load pickup availability
Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Heavy Duty U-Joint Assembly – Fits MerCruiser Alpha/Bravo (Replaces...
Product Details
This Heavy Duty U-Joint Assembly is engineered for reliable performance in MerCruiser Alpha One Generation I (serial numbers B418819 and above), Alpha One Generation II, Alpha One SS, and Bravo stern drives. It provides a robust, direct-fit solution for maintaining or upgrading your drive system's gimbal and transmission linkage.
This assembly provides a direct interchange for numerous OEM and aftermarket part numbers, including MerCruiser 75832A3, OMC 915717, and Volvo Penta 3850812, ensuring broad compatibility.
- Designed as a direct replacement for straightforward installation.
- Heavy-duty construction ensures balanced, durable performance.
- Includes both straight and 90° grease fittings for flexible maintenance.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| MerCruiser | 36312 / 41431 / 58749 / 758321 / 75832 / 75832A1 / 75832A2 / 75832A3 / 75832B / 75832B1 / 75832B2 / 75832B3 / 75832T / 75832T1 |
| OMC | 912214 / 915716 / 915717 / 3850812 |
| Volvo Penta | 3850812 / 853255 |
| GLM | 28030 |
| Mallory | 9-72405 |
| Sierra | 18-2174 |
| Orbitrade | 19612 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This part is designed for specific MerCruiser Alpha and Bravo sterndrives as detailed below.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| MerCruiser | Alpha I | Various | 4-Stroke | 1984–1990 | 75832/75832A3 | Serial numbers B418819 & above |
| MerCruiser | Alpha I SS | Various | 4-Stroke | 1986–1994 | 75832/75832A3 | |
| MerCruiser | Alpha I Gen II | Various | 4-Stroke | 1991–1997 | 75832/75832A3 | Serial numbers D469859-F679999 (old design) |
| MerCruiser | Bravo | Various | 4-Stroke | 1988–Present | 75832/75832A3 | Rockwell-type |
Fits select OMC Cobra and King Cobra drives.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| OMC | Cobra Drives | Various | 4-Stroke | 1986–1989 | 915717/3850812 | |
| OMC | King Cobra Drives | Various | 4-Stroke | 1990 & up | 915717/3850812 |
Fits a wide range of Volvo Penta sterndrive models that use the specified OEM part number.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Volvo Penta | AQ200/250/270/280/290 | Various | 4-Stroke | 3850812 | Rockwell-type |
| Volvo Penta | DP-SA/SB/SM/S/S1 | Various | 4-Stroke | 3850812 | |
| Volvo Penta | SX-A/C/C1/CT/CT1/R/R1/R2/S/M/M1 | Various | 4-Stroke | 3850812 | |
| Volvo Penta | 3.0L GS/GL | Various | 4-Stroke | 3850812 | |
| Volvo Penta | 4.3L GL/GS/GI | Various | 4-Stroke | 3850812 | |
| Volvo Penta | 5.0L GL/GI | Various | 4-Stroke | 3850812 | |
| Volvo Penta | 5.7L GL/GI | Various | 4-Stroke | 3850812 | |
| Volvo Penta | 5.8 FL/FI/FSI | Various | 4-Stroke | 3850812 | |
| Volvo Penta | FWD | Various | 4-Stroke | 3850812 | |
| Volvo Penta | XDP | Various | 4-Stroke | 3850812 |
Technical Specs
- Product Type
- Heavy Duty Universal Joint Assembly
- Installation
- Direct replacement
- Connection
- U-Joint Cross Assembly
- Housing Material
- Steel
- Housing Color
- Silver/Metal
- Fitting Type
- Includes both straight and 90° grease fittings
- Warranty
- 1 Year (varies by manufacturer)
- Other Technical Attributes
- Heavy duty construction for balanced performance
What’s in the Box
- 2 x U-Joint Assemblies (Replaces 75832A3/758321/75832T1)
Installation Notes
- Before starting, disconnect the battery and ensure the sterndrive unit is safely secured and accessible.
- Remove the sterndrive from the gimbal housing according to the manufacturer's service manual.
- Carefully press or tap out the old U-joint assembly from the yokes, noting the orientation of all components.
- Clean the yoke bores thoroughly to remove any rust, dirt, or burrs.
- Install the new U-joint assembly, ensuring the bearing caps are seated correctly without damaging the needle bearings.
- Use the provided grease fittings to lubricate the new U-joint with marine-grade grease until it purges from all four seals.
- Reinstall the sterndrive, ensuring proper alignment and torque on all fasteners. Always test for smooth operation before use.
Troubleshooting & FAQ
How do I know if this U-joint fits my specific engine?
Verify your sterndrive model and year against the compatibility tables. This assembly is designed for MerCruiser Alpha I/II, Alpha SS, and Bravo drives, along with specific OMC and Volvo Penta models. Matching the OEM part number (e.g., 75832A3, 915717, 3850812) is the most reliable way to confirm fitment.
What are the signs of a failing U-joint?
Common symptoms include abnormal vibrations from the rear of the boat (especially when turning), clunking or grinding noises from the sterndrive, and visible rust or damage around the U-joint caps. Addressing these signs promptly can prevent catastrophic failure and damage to other driveline components.
How often should these U-joints be greased?
U-joints should be greased as part of your regular maintenance schedule, typically at least once a season or every 100 hours of operation. Use a high-quality marine-grade grease. The inclusion of both straight and 90° fittings allows for easier access depending on your setup.
Can I replace just one U-joint?
While possible, it is highly recommended to replace U-joints in pairs to ensure even wear and balanced performance. This package includes two assemblies for a complete replacement of the sterndrive's universal joints.
Is any special tool required for installation?
A bench vise or a hydraulic press is typically required to safely press the old joints out and the new ones in without damaging the yokes or new bearing caps. A U-joint press tool can also be used. Attempting removal with only a hammer can lead to component damage.
What is the difference between an OEM part and this aftermarket one?
This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials. Our parts are manufactured in an ISO 9002 facility and are batch-inspected for quality and consistency.
What are the shipping speed and cost?
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free to most regions, with expedited options available at checkout where applicable.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal marine use. If an issue arises, contact our support team with your order details. Returns are accepted within our standard window for items that are unused and in original condition. Please see our policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against your original part before purchase. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement component, not an original equipment manufacturer (OEM) part.
- Professional installation is strongly recommended for safety, proper function, and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or quality control.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
