Mercury MerCruiser Quicksilver Integral Fuel-Tank Seal 815109
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 MerCruiser Quicksilver 25-815109 is the integral fuel-tank seal used in specified small Mercury and Mariner two-stroke outboards. It is identified in the cowl-and-fuel-tank assembly with the tank and cap components.
Key Features
- OEM fuel-tank seal, full reference 25-815109.
- Also cataloged as an O-ring / seal.
- Supersedes 25-95389.
- GTIN: 745061314023.
Engine Compatibility
Verified applications include specified Mercury / Mariner 2, 2.5, 3 and 3.3HP two-stroke outboards. The 3.3HP catalog lists the seal in the cowl-and-fuel-tank assembly for serials 0D901217–0G710612. Match the tank and cap design for the exact engine.
Replacement and Installation
Replace a split, hardened, swollen or leaking seal. Work with the engine stopped and cool, away from ignition sources, and keep contamination out of the fuel tank. Check the mating tank / cap surfaces and verify that the assembly seals correctly before operation.
Parts Desk Insight
Similar small outboards can have different tank and cap arrangements. Confirm the cowl-and-fuel-tank diagram before choosing the seal.
Manufacturer Parts Lookup
Use Mercury’s official parts finder to check the part against your engine or drive serial number.
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.