Mercury O-Ring 33465
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You have 30 days to request a return. All sale items are final sale.
Mercury 33465 is a genuine OEM O-ring used in selected Mercury and MerCruiser applications. Dealer listings identify it in Mercury catalog format as 25-33465, and current OEM parts listings describe it specifically as an O-ring, transfer port cover.
Key Features
- Genuine Mercury Marine / Quicksilver OEM part
- Part number 33465
- Mercury shorthand listing: 25-33465
- Identified as a transfer port cover O-ring
- Small sealing component for exact OEM service replacement.
Engine Compatibility
This O-ring appears in a broad range of Mercury applications, including selected older Mercury/Mariner outboards and jet-drive related listings in dealer fitment references. Because O-rings are highly application-specific, exact compatibility should always be confirmed by model and serial number before ordering.
Serial Number Fitment Notice
Please confirm compatibility in the Mercury Parts Catalog using your exact engine serial number before purchase. Mercury’s catalog is the safest way to verify the correct sealing part in the correct assembly diagram.
When This Part Needs Replacement
Replace this O-ring when the original seal is flattened, brittle, cracked, leaking, or disturbed during service of the transfer port cover or related assembly. As a sealing part, it is best replaced anytime the joint is opened up for service. This is a practical service inference based on the part’s documented use as a transfer port cover O-ring.
Installation Notes
Install only the exact O-ring specified for the application being serviced. Small OEM seals can look similar while differing in diameter and thickness, so matching by exact part number is the safest approach. After identifying the correct diagram, confirm by model and serial number before installation.
Alternate / Superseded Part Numbers
- 25-33465
- Superseded by 8M0215007
- Related older references seen in cross-listings: 25-54029 and 25-822370
Parts Desk Insight
With small sealing parts like this, exact matching matters more than appearance. Using the correct OEM O-ring helps avoid nuisance leaks and saves repeat teardown time on older Mercury assemblies. This is a practical service inference supported by the part’s use as a dedicated transfer port cover seal.
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
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.