Mercury MerCruiser Quicksilver ā U-Joint Oil Seal Carrier Assembly ā 8M0171103
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Mercury MerCruiser Quicksilver U-Joint Oil Seal Carrier Assembly ā 8M0171103
This genuine OEM carrier assembly supports the oil seal at the upper drive-gear/U-joint area inside the driveshaft housing of select MerCruiser sterndrives, forming part of the sealing and bearing-support stack within the drive.
Compatible Applications
- R / MR sterndrives
- Alpha One
- Alpha One SS
- Alpha One Gen II
- Numerous earlier MerCruiser MC-1 and pre-Alpha drive applications
Coverage spans older 1960sā1980s drives through Alpha One Gen II applications. Confirm your exact drive model and serial number before ordering, since bearing, seal, and driveshaft configurations vary by drive generation and gear ratio.
Part Details
- Part Number: 8M0171103
- Brand: Mercury Marine / Quicksilver
- Product Type: U-Joint Oil Seal Carrier Assembly
- System: Driveshaft Housing / Upper Gear Housing
- Quantity: 1 per applicable assembly
- GTIN: 745061168176
When This Part Needs Replacement
Replace the carrier if it is damaged, corroded, distorted, or no longer supports the oil seal correctly. Inspect it whenever the upper-drive oil seal or drive-gear bearing assembly is serviced.
Installation Notes
This carrier sits between the retaining ring/O-ring and the drive-gear oil seal. Inspect the carrier O-ring, oil seal, retaining ring, and bearing components during service, and follow the correct MerCruiser procedure for drive-gear preload and seal installation.
Related Parts
- 8M0214941 ā Oil Seal Carrier O-Ring
- 823894 ā Oil Seal
- 35983 ā Bearing Retainer Ring
- 35988A12 ā Drive Gear Roller Bearing Kit
- 8M0169040 ā Tapered Roller Bearing Retainer
Alternate/Superseded Part Numbers
- 8M0171103 ā current OEM number
- 66081A2 ā superseded by 8M0171103
- 35993A1 ā superseded by 8M0171103
Technical FAQ
Does this carrier fit every Alpha One drive?
Coverage is broad, but bearing, seal, and driveshaft configurations vary by drive generation and gear ratio, so confirm your drive's serial number before ordering.
Is there a superseding part number?
No, 8M0171103 is the current OEM number and itself supersedes 66081A2 and 35993A1.
Parts Desk Insights
Best use case: replacing a worn or damaged seal carrier while servicing the upper-drive oil seal or drive-gear bearing assembly on a compatible MerCruiser sterndrive.
Common mistake: assuming broad drive-family compatibility means any unit will fit. Bearing, seal, and driveshaft configurations vary by drive generation and gear ratio, so the drive serial number should always be checked first.
Sizing and fitment guidance: if you are already apart for an oil-seal repair, inspect the carrier bore, O-ring, and surrounding bearing hardware before reassembly to confirm everything matches your drive's configuration.
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 ā 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 ā 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.