Mercury MerCruiser Quicksilver Bearing Carrier Seal 8M0204670

Name: Mercury MerCruiser Quicksilver Bearing Carrier Seal 8M0204670
Brand: MERC
SKU: 8M0204670
Price: 28.79 CAD
Availability: OutOfStock

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$28.79 - $28.79

$28.79

$28.79 - $28.79

$28.79

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Out of stock

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Part Number: 8M0204670 (Mercury service ref: 26-8M0204670)
Brand: Mercury / Quicksilver (OEM Genuine)
Official Part Type: Bearing carrier / gearcase oil seal
GTIN / UPC: 745061178106

Genuine Mercury Quicksilver 8M0204670 is a bearing carrier seal for compatible Mercury outboard and MerCruiser gearcase assemblies. It installs around the propeller shaft at the bearing carrier to prevent water from entering the gearcase and protect internal components from contamination. Mercury identifies it as the inner bearing carrier seal on applicable assemblies — it should not be confused with the separate outer propeller-shaft seal used alongside it in many Mercury bearing carrier configurations.

Compatible Applications

Mercury FourStroke and Pro XS outboards — including 115 HP FourStroke / Pro XS configurations
Mercury and MerCruiser bearing carrier gearcase assemblies across legacy and current gearcase families
Various Mercury outboard gear housing and propeller shaft assemblies per Mercury parts diagrams
Confirm fitment by engine or drive serial number and gearcase parts diagram before ordering — some assemblies require more than one seal

Engine Family: Mercury FourStroke, Pro XS, and MerCruiser gearcase families
System: Gearcase / lower unit sealing
Diagram Position: Inner seal — propeller shaft bearing carrier assembly

Serial Number Requirement
Fitment depends on the exact gearcase, bearing carrier, and serial number range. On applicable Mercury outboard gearcases, 8M0204670 is the inside seal; a separate outer seal is used in the same carrier assembly. Always verify your specific serial number against the gearcase parts diagram before ordering.

Superseded / Alternate Part Numbers

Current OEM: 8M0204670 / 26-8M0204670
Supersedes: 26-76868 / 76868
Additional legacy references: 30550, 70019, 73838, 76868B

When to Replace

Whenever the bearing carrier is removed — used seals should not be reinstalled
When gear lube appears milky or discoloured, indicating water contamination
When gear oil is leaking around the propeller shaft
When the seal lip is visibly damaged, deformed, or torn during disassembly
As part of a complete gearcase rebuild or overhaul

Service Interval
Inspect the sealing area whenever gear lube is changed (every 100 hours or annually). Replace the seal any time the bearing carrier is removed — regardless of apparent condition. Reinstalling a used seal is a leading cause of repeat gearcase leaks.

Installation Notes

Inspect the propeller shaft and bearing carrier sealing surfaces for scoring or wear before installing
Confirm installation depth, orientation, and quantity against the Mercury service manual or gearcase parts diagram — some assemblies use more than one seal in the carrier stack
Lubricate seal lips as specified in the service manual
Pressure-test the gearcase after assembly before returning to service

Technical FAQ

What did 8M0204670 replace?
8M0204670 supersedes 26-76868 / 76868. If you have been ordering 76868, this is the current OEM replacement. Legacy references in this seal family include 30550, 70019, 73838, and 76868B.

How many seals does my gearcase need?
It depends on the engine model and gearcase design. Some Mercury assemblies use a single bearing carrier seal; others require two in the same carrier. Check the parts diagram for your specific serial number.

Can I reuse the seal if it looks undamaged?
No. Replace the seal any time it is removed. A seal that appears intact may no longer provide a reliable interference fit after removal — this is a leading cause of repeat leaks.

Is this the inner or outer seal?
8M0204670 is the inner bearing carrier seal on applicable assemblies. A separate outer seal is used alongside it in many Mercury configurations. Confirm both part numbers and positions from your gearcase diagram before ordering.

Parts Desk Insights
The most common customer mistake is finding milky gear lube, changing the fluid, and skipping the seal replacement — which guarantees the same problem returns. Any time water gets into the gearcase, the seals come out. The critical detail with this part: confirm diagram position and quantity, as some Mercury assemblies use more than one seal in the bearing carrier stack. The inner/outer distinction is important — do not substitute this seal for the outer propeller shaft seal without verifying both part numbers from the diagram.

Related Parts

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

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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.

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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:

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