Mercury MerCruiser Gasket 8M0204687
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Maintain proper sealing of your sterndrive or outboard gearcase with the Mercury MerCruiser Gasket 8M0204687. This genuine Mercury Marine OEM gasket is designed for use with gearcase drain and vent screws, helping prevent gear oil leaks while protecting the gearcase from water intrusion.
The gasket compresses between the drain or vent screw and the gearcase housing to create a reliable watertight seal. Using OEM Mercury sealing components ensures correct fitment, consistent compression, and long-lasting durability in harsh marine environments.
Key Features
-
Genuine Mercury Marine OEM sealing gasket
-
Designed for gearcase drain and vent screw sealing
-
Helps prevent gear oil leaks and water intrusion
-
Durable construction designed for marine environments
-
Maintains proper gearcase lubrication integrity
-
Direct replacement for original Mercury sealing gaskets
Part Details
OEM Part Number: 8M0204687
Mercury Reference Number: 26-8M0204687
Product Type: Gearcase drain screw gasket / sealing washer
Material: Marine-grade sealing gasket material
Application: Gearcase drain and vent screw sealing gasket
Typical Packaging: Individual gasket or sold in service packs
Compatible Mercury & MerCruiser Engines
Used on many gearcases with standard drain and vent screws, including:
Mercury Outboards
-
Mercury 2.5HP – 400HP outboards
-
Mercury Two-Stroke outboards
-
Mercury FourStroke outboards
-
Mercury Pro XS outboards
-
Mercury Verado outboards
MerCruiser Sterndrives
-
Alpha One
-
Alpha One Gen II
-
Bravo One
-
Bravo Two
-
Bravo Three
Function
The gasket installs beneath the gearcase drain or vent screw to maintain a watertight seal after gear lube service. A proper seal prevents lubricant loss and protects the gearcase from water contamination.
Replacing worn gaskets helps:
-
Prevent gear oil leaks
-
Stop water intrusion into the gearcase
-
Maintain proper lubrication of internal gears
-
Protect sterndrive and gearcase components from corrosion
Important Compatibility Note
Gearcase drain screw gaskets may vary depending on gearcase design, screw size, and engine production year. Always verify compatibility using the engine or sterndrive serial number before ordering to ensure the correct gasket.
Cross-Stock / Reference Part Numbers
-
Mercury Reference Number: 26-8M0204687
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.