Mercury MerCruiser Quicksilver O-Ring 23145
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Mercury MerCruiser Quicksilver 25-23145 is a genuine Mercury Marine O-ring used as a sealing ring in select Mercury, Mariner, MerCruiser, Mercury Racing, trim/tilt, and drive-related assemblies. Mercury parts references identify this part as O-RING (.984 x .139), with base manufacturer part number 23145.
Key Features
- Genuine Mercury Marine / Quicksilver O-ring reference
- Size reference: .984 in. x .139 in.
- OEM part number: 25-23145
- Base part reference: 23145
- GTIN / UPC reference: 745061131088
- Catalog package reference: approximately 1.50 in. x 1.40 in. x 0.30 in.
- Catalog weight reference: approximately 0.01 lb
Engine Compatibility
This O-ring appears across a wide range of Mercury and MerCruiser parts diagrams, including select older 5 HP, 9.9 HP, 15 HP, 6-cylinder Mercury outboards, classic MerCruiser sterndrive engines such as 120/140, 165, 225-S, 228, 233, 250, 260, 470, 485, 888, and 898, early sterndrive assemblies, Mercury Racing dry-sump / SSM / NXT applications, and trim / tilt / lift system component groups depending on serial number and diagram location.
Serial Number Fitment Notice
O-ring fitment depends on the exact engine, drive, trim system, component group, and serial number range. Always confirm compatibility using the Mercury or MerCruiser serial number and the exact parts diagram before ordering, especially because 25-23145 appears in many different assemblies.
When This Part Needs Replacement
Replace this O-ring whenever the related assembly is opened, or if the original seal is flattened, cut, brittle, swollen, cracked, missing, or no longer sealing properly. Reusing a compressed or damaged O-ring can lead to leaks and repeat service.
Installation Notes
Clean the O-ring groove and mating surface before installation. Lightly lubricate the O-ring with the service-manual-approved lubricant where specified, and make sure it seats evenly without twisting, stretching, rolling, or pinching during assembly. Confirm the exact diagram location before installation because this O-ring has broad Mercury and MerCruiser usage.
Alternate/Superseded Part Numbers
- 25-23145
- 23145
- 25-843315
- 843315
- F702736
- Volvo Penta 125017 — related cross-reference in supported applications
- OMC / Johnson / Evinrude 0302540, 0320140, 0508486, 0777563, 0908096, 302450, 302540
- Sierra 18-7114
- Sierra 18-7178
- GLM 82140
Parts Desk Insight
This is a broad-use Mercury sealing ring, so the safest match is the exact parts diagram callout. The size is important, but diagram location matters just as much because the same O-ring can appear in different engines, drives, and trim assemblies.
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.