Gimbal Bearing MerCruiser Volvo Penta 47-21001
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47-21001 is a heavy-duty gimbal bearing used in sterndrive transom assemblies to support the drive shaft through the gimbal housing and help maintain proper driveline alignment between the engine coupler and sterndrive input shaft. It is a critical service part during bellows, alignment, and transom repairs where smooth shaft support and correct driveline positioning matter.
Key Features
- Heavy-duty gimbal bearing for sterndrive transom assemblies
- Supports proper drive-shaft alignment through the gimbal housing
- Common replacement item during bellows, alignment, and transom service
- Marine driveline support bearing, not a general-purpose bearing
- Best matched by exact sterndrive application and serial-based fitment
Engine Compatibility
This bearing should be matched by drive and transom assembly, not by engine long-block alone. Gimbal bearings are used across sterndrive platforms, but exact fitment depends on the gimbal housing, drive family, and model year. The safest fitment path is to confirm 47-21001 against the exact sterndrive make, model, and serial-number-based parts breakdown before ordering.
Serial Number Fitment Notice
Match 47-21001 to your sterndrive serial number and the correct transom assembly diagram before ordering. Gimbal bearings can look similar across multiple applications, but correct fit depends on the exact housing and driveline setup.
When This Part Needs Replacement
A gimbal bearing is typically replaced when it becomes noisy, rough, loose, corroded, or shows wear during alignment checks or sterndrive removal. It is also smart to inspect or replace it anytime the bellows, U-joints, or other transom-service parts are already apart, since labor overlap is high in this area.
Installation Notes
Confirm the exact application before installation and compare the removed bearing carefully against the replacement part. Proper installation depth, correct alignment, and inspection of nearby bellows, U-joints, and seals all matter during service. On sterndrive transom work, exact fit and alignment matter more than a quick visual match.
Alternate/Superseded Part Numbers
Use 47-21001 as the core reference and confirm any related cross-reference numbers against the exact drive application before ordering. Gimbal bearing numbers often cross through multiple aftermarket catalogs, so application confirmation is the safer move.
Parts Desk Insight
With gimbal bearings, the easy mistake is replacing only the noisy bearing and skipping the surrounding inspection. If the drive is already off, checking alignment, bellows condition, and nearby driveline wear at the same time usually saves repeat labor.
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
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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.
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