Mercury MerCruiser Quicksilver Bearing Carrier Key 30281
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Mercury MerCruiser Quicksilver 30281 is a genuine OEM bearing carrier key used in select Mercury, Mariner, and MerCruiser lower-unit / gearcase service applications. The full Mercury part reference is commonly listed as 28-30281. This key helps locate and retain the bearing carrier in the gear housing, supporting correct lower-unit alignment and preventing unwanted carrier movement during operation.
Key Features
- Genuine Mercury Marine / Quicksilver OEM key.
- Part number 30281 / 28-30281.
- Commonly identified as a bearing carrier key or lower-unit key.
- Used in select Mercury, Mariner, and MerCruiser lower-unit / gearcase assemblies.
- Supports correct bearing carrier positioning in the gear housing.
- Small OEM hardware part that should be matched by exact gearcase diagram.
- GTIN / UPC reference: 745061133983.
- Approximate package size reference: 1.00" x 1.00" x 0.25".
Engine Compatibility
This is not an engine-only part. The strongest supportable fitment is by gearcase, lower unit, drive model, and serial-number-based parts diagram.
Commonly associated applications include:
- Select Mercury / Mariner outboards from roughly 35 HP through 225 HP, depending on model and serial range.
- Select high-performance Mercury outboard lower units, including XR, Pro Max / Super Mag, XS, and related performance gearcase families.
- Select MerCruiser sterndrive applications including Alpha One, Bravo, TR / TRS, and SSM drive families where this key is specified.
- Select lower-unit bearing carrier service layouts.
Because 30281 appears across many Mercury and MerCruiser product families, the exact diagram callout matters more than the engine horsepower alone.
Serial Number Fitment Notice
Verify fitment by exact engine, drive, or gearcase serial number and the correct Mercury parts diagram before ordering. This key appears in many lower-unit and bearing carrier layouts, and similar small keys can look close while fitting different gearcase assemblies.
When This Part Needs Replacement
Replace this key when the bearing carrier is removed, when the original key is damaged, worn, corroded, missing, or no longer fits securely in the gearcase. It should also be inspected during lower-unit service where the carrier has moved, loosened, or been removed for seal, bearing, or gearcase repair.
Installation Notes
Install 30281 / 28-30281 only after confirming the correct bearing carrier and gearcase diagram. Inspect the carrier, gear housing keyway, seals, and related retaining hardware during service. The key must seat correctly in the carrier location to maintain proper assembly alignment.
Alternate / Superseded Part Numbers
The active OEM Mercury part number for this listing is 30281 / 28-30281. Related aftermarket or cross-reference numbers commonly associated with this key include:
- REC28-30281
- GLM 11080
Parts Desk Insight
The easy mistake with this key is treating it like generic key stock. On Mercury and MerCruiser lower units, the correct match is the bearing carrier diagram and gearcase serial number, because a small difference in key size or location can affect how the carrier seats in the housing.
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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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