Mercury MerCruiser Quicksilver Driveshaft Retainer O-Ring 36318
In stock items ship same or next day.
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Product Description
Mercury Quicksilver 25-36318 is the 0.799-inch catalog-designation O-ring used in specified driveshaft-retainer and gear-housing assemblies. It appears in the TorqueMaster/FleetMaster heavy-duty driveshaft section for Mercury 300X 3.0L EFI Pro Max outboards.
Key Features
- Legacy reference: 25-36318.
- Catalog size designation: 0.799 inches.
- Current replacement: 25-8M0214927.
- Two rings specified in the referenced 300X gear-housing assembly.
Compatibility and Fitment
Confirm the installed gearcase type and driveshaft-retainer callout. Different gear-housing sections use different seals even within the same engine family.
Replacement and Installation
Renew damaged or flattened rings when the retainer is removed. Inspect and clean the sealing grooves, then use the lubrication and assembly procedure specified for that gearcase.
Alternate / Superseded Part Numbers
25-36318 is superseded by 25-8M0214927.
Mercury Parts Finder
Search Mercury parts by serial number or part number.
Parts Desk Insight
Match the gearcase as well as the engine. TorqueMaster, FleetMaster and other lower-unit configurations must be checked individually.
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.