MerCruiser U-Joint Cross & Bearing 866136A01 | Bravo X XR XZ GKN
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U-Joint Cross & Bearing — Part 866136A01
| Part Number | 866136A01 |
|---|---|
| Brand | Mercury Marine / MerCruiser / Quicksilver |
| Official Product Type | U-Joint Cross and Bearing Assembly |
| System | Sterndrive — U-Joint / Driveshaft Assembly |
| U-Joint Style | GKN |
| Bearing Cap OD | 1.218 in. / 30.94 mm |
| Quantity in Assembly | 2 (one per U-joint position in the shaft assembly) |
| Serial Number Break | Bravo X / XR / XZ serial 0M750175 and above |
This is the genuine OEM U-joint cross and bearing for the GKN-style universal-joint assembly used in Bravo X, Bravo XR, and Bravo XZ sterndrives from serial number 0M750175 and above. Two of these assemblies are used in the applicable U-joint shaft — one at each cross position. Because both joints operate together, both should be inspected and replaced as a pair whenever the drive is removed for service.
Important: This part is for the later GKN design only. Bravo X/XR/XZ drives built before serial 0M750175 use the earlier Meritor-style U-joint, which has a larger 1.328 in. bearing cap and is a completely different assembly. Using the wrong cross in the wrong drive will result in an improper fit.
Part Number Reference
- Current OEM number: 866136A01 (GKN style, serial 0M750175 and above)
- Earlier Meritor style: 862132T (serial 0M750174 and below — not interchangeable, different bearing cap OD)
- Complete replacement assembly for Meritor-era drives: 865425A03 (search by part number)
Compatible Applications
Confirm fitment by drive serial number. The GKN and Meritor U-joint designs are not interchangeable even though they fit the same drive models at different production ranges.
- Bravo X — GKN U-joint assembly, serial 0M750175 and above
- Bravo XR — GKN U-joint assembly, serial 0M750175 and above
- Bravo XZ — GKN U-joint assembly, serial 0M750175 and above
When This Part Needs Replacement
- The joint feels rough, notchy, or binds when moved by hand
- Excessive play is present at the U-joint cross
- Bearing caps show corrosion or rust contamination
- A failed U-joint bellows has allowed water intrusion into the joint area
- Vibration or knocking is traced to the universal-joint assembly under load
- The joint has seized or developed uneven movement
- Routine inspection during drive removal shows bearing wear
Because two U-joint crosses are used in the applicable shaft assembly, both should be inspected and replaced together whenever the drive is serviced.
Related Parts
- 866133A01 — Splined coupler-end yoke (GKN assembly — search by part number)
- 866137T — Center socket (search by part number)
- 866134T — Gear-end yoke (search by part number)
- 8M0205246 — Retainer / seal kit (search by part number)
- 8M0204650 — O-ring (search by part number)
- 8M0204654 — O-ring (search by part number)
- 8M0173219 — Washer (search by part number)
- 8M0104358 — Tapered roller bearing assembly (search by part number)
- U-Joint Bellows — inspect and replace if water intrusion has occurred
- Mercury/MerCruiser U-Joint Cross & Bearing 805536A2
- Mercury/MerCruiser U-Joint Cross & Bearing 75832T
- Mercury MerCruiser Double Yoke / Center Socket – U-Joint Assembly 393831
- Mercury MerCruiser U-Joint Coupling-End Yoke Assembly 39385A1
Installation Notes
- Inspect both U-joint cross positions — replace as a pair if either shows wear
- Inspect the U-joint bellows for leakage before reinstalling the drive
- Check yokes and bearing bores for wear or distortion
- Inspect the center socket (866137T) for wear
- Verify drive alignment before final reinstallation
- Follow the applicable MerCruiser service procedure for pressing and retaining the bearing caps — incorrect installation can damage the bearing bores
Parts Desk Insights
Most common customer issue: Ordering this part without confirming the drive serial number and U-joint style. Bravo X/XR/XZ drives split between the Meritor and GKN designs at serial 0M750175. The GKN cross (866136A01) has 1.218 in. bearing caps; the Meritor cross (862132T) has 1.328 in. caps. They look similar but will not fit each other’s yokes. If you’re unsure which style your drive has, check the serial number before ordering — or send us the serial number and we’ll confirm.
Best use case: Ideal for Bravo X/XR/XZ owners doing a full drive service, rebuilding the U-joint assembly after bellows failure allowed water intrusion, or addressing vibration traced to the driveshaft. Always replace both crosses at the same time and replace the bellows if there’s any sign of deterioration — water in the U-joint area is the primary cause of premature bearing failure on these drives.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.