Description

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.