Quicksilver Bearing Carrier Key 30281 – Mercury MerCruiser OEM
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Quicksilver Bearing Carrier Key 30281
This genuine OEM key locates and retains the bearing carrier in the gear housing of select Mercury and MerCruiser lower units. It’s a small part with a precise job: keeping the bearing carrier correctly positioned so the lower unit runs true under load. A worn, damaged, or missing key can allow the carrier to shift in the housing — which affects alignment and can accelerate wear on surrounding components. This is the exact OEM part specified in the Mercury parts diagram, not a generic key-stock substitute.
Key Specifications
- Part Number: 30281 (OEM ref: 28-30281)
- Type: Bearing Carrier Key
- GTIN/UPC: 745061133983
- Package size reference: 1.00" x 1.00" x 0.25"
- Genuine OEM — not aftermarket
Common Applications
This key appears across a wide range of Mercury and MerCruiser lower-unit assemblies, including select Mercury and Mariner outboards from approximately 35–225 HP, high-performance gearcase families (XR, Pro Max/Super Mag, XS), and MerCruiser sterndrive applications including Alpha One, Bravo, TR/TRS, and SSM drives. Because it appears in many different gearcase layouts, always verify against your engine or drive’s current parts diagram and serial number before ordering.
Aftermarket Cross-References
- REC28-30281
- GLM 11080
When to Replace
Replace any time the bearing carrier is removed, or when the key shows signs of damage, wear, corrosion, or a loose fit in the keyway. Inspect it during any lower-unit service where the carrier has been removed for seal, bearing, or gearcase repair.
Installation Notes
Confirm the correct bearing carrier and gearcase diagram before installation. The key must seat fully and correctly in the carrier location to maintain proper assembly alignment. Inspect the carrier, gear housing keyway, and related retaining hardware during service.
Related Products
Parts Desk Insights
Best used as a direct OEM replacement during lower-unit or gearcase service where the parts diagram calls for 30281. The most common 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. A small difference in key size or location can affect how the carrier seats in the housing. If you’re doing a full lower-unit rebuild, inspect the keyway in the gear housing at the same time — a worn keyway won’t hold a new key securely.
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.