Mercury MerCruiser Quicksilver O-Ring .468 x .078 831985
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 25-831985 is an O-ring cataloged at .468 x .078 inch. It is used in selected vapor-separator and OptiMax air-compressor assemblies.
Product Compatibility
In the V-175 EFI 2.5L vapor separator, serial 0T409000–0T800999, this O-ring is specified for the pump-outlet arrangement with a filter. It is also shown with the filtered arrangement on 200/225/250 3.0L SeaPro/Marathon EFI vapor separators.
Alternate Part Numbers
25-831985 supersedes 25-885187 in the listed filtered vapor-separator application.
Replacement and Installation
Inspect the O-ring groove and sealing surfaces when the fitting is removed. Use the seal and lubrication specified for the exact assembly, and check for leaks after service.
Parts Desk Insight
The filtered and unfiltered vapor-separator outlet arrangements use different O-rings. Confirm which fitting is installed before ordering.
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.