Mercury MerCruiser Quicksilver Replacement Part 8M2011027
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Mercury MerCruiser / Quicksilver Replacement Part – 8M2011027
The Mercury Marine / Quicksilver 8M2011027 is a bearing carrier retaining nut (retainer / spanner nut) used in the lower unit or sterndrive gearcase of certain Mercury and MerCruiser engines. Its function is to secure the bearing carrier inside the gear housing, keeping internal drivetrain components properly aligned and sealed.
Key Features
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Genuine Mercury / Quicksilver OEM retaining nut
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Secures the bearing carrier in the lower unit / gearcase
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Maintains proper alignment of gears and drivetrain components
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Designed for sterndrive and high-horsepower outboard lower units
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Built to withstand marine drivetrain loads and vibration
Superseded / Replacement Part
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8M2011027 → superseded by 8M0168577 (current replacement part number).
Cross Reference
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Mercury 79448
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Mercury 8M2000347
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Sierra / aftermarket equivalents available depending on manufacturer.
Compatible Mercury / MerCruiser Applications
Commonly used on Mercury outboards and MerCruiser sterndrives, including:
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Verado outboards (approx. 135–300 HP)
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MerCruiser Bravo I and Bravo II sterndrives
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Certain Alpha, Vazer, and other sterndrive gearcases depending on configuration.
Function in the Drive System
The retainer nut holds the bearing carrier assembly in the gear housing, which supports the propeller shaft bearings and seals. Proper installation ensures drivetrain stability and prevents internal gear movement or seal failure.
Important Compatibility Note
Lower-unit hardware varies by drive model, engine horsepower, and serial number range. Always verify compatibility using the engine or sterndrive serial number before ordering.
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
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.