Mercury MerCruiser Bellows Assembly – 8M0062406

Protect your sterndrive drivetrain components with the Mercury MerCruiser Bellows Assembly 8M0062406. This genuine Mercury OEM U-joint bellows creates a flexible, watertight seal between the sterndrive and the transom assembly, preventing water from entering the boat through the bell housing.

The ribbed composite bellows allows the driveshaft and U-joint to move freely while maintaining a sealed barrier against water, dirt, and debris. Proper bellows condition is critical for protecting the U-joints, gimbal bearing, and other drivetrain components from corrosion and damage.

Key Features

• Genuine Mercury Marine / Quicksilver OEM bellows assembly

• Designed to seal the U-joint area of the sterndrive

• Prevents water intrusion into the bell housing and boat hull

• Flexible ribbed composite construction for durability

• Includes hose clamps for secure installation

• Helps protect U-joints, gimbal bearings, and drive components

Part Details

OEM Part Number: 8M0062406
Product Type: U-joint bellows assembly
Application: Sterndrive transom assembly seal

Supersedes / Replaces

• 86840A05

• 86840A3

Kit Typically Includes

• U-joint bellows

• Hose clamps for both ends

• Mounting components

Compatible MerCruiser Drives

Designed for MerCruiser sterndrives using Bravo-style transom assemblies, including:

MerCruiser Sterndrives

• Bravo One

• Bravo Two

• Bravo Three

• Blackhawk sterndrives

• Vazer sterndrives

Model Years:

• Typically 1991 and newer Bravo / Blackhawk / Vazer drives.

Common Engine Packages Using These Drives

These drives are commonly paired with engines such as:

• MerCruiser 4.3L V6

• MerCruiser 5.0L V8

• MerCruiser 5.7L V8

• MerCruiser 6.2L V8

• MerCruiser 7.4L V8

• MerCruiser 8.2L V8

Function

The U-joint bellows seals the opening between the sterndrive and the boat’s transom assembly while allowing the drive to move during steering and trim operation.

A properly functioning bellows:

• Prevents water from entering the boat hull

• Protects U-joints and gimbal bearings from corrosion

• Maintains proper sterndrive operation

• Extends the life of drivetrain components

Cracked or worn bellows can allow water intrusion, which may lead to U-joint failure, bearing damage, and expensive drivetrain repairs.

Important Compatibility Note

Bellows assemblies vary depending on sterndrive model, transom assembly type, and serial number range. Always verify compatibility using the engine or sterndrive serial number before ordering to ensure the correct replacement part.

Shipping: Ships same or next day for fast Canada wide shipping. ⚓