Description

Mercury MerCruiser / Quicksilver Carrier Assembly – 8M0171142

The Mercury Marine / Quicksilver 8M0171142 Carrier Assembly is an OEM input-shaft seal carrier assembly used in MerCruiser Bravo sterndrive gearcases. It houses the oil seal around the input shaft and forms a watertight barrier that prevents water from entering the upper gear housing while keeping gear oil contained.

This component is critical to the reliability of the sterndrive because it protects internal gears and bearings from water intrusion and lubricant loss.

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Key Features

• Genuine Mercury / Quicksilver OEM carrier assembly

• Houses the input shaft oil seal in the upper gearcase

• Helps prevent water intrusion and gear oil leakage

• Supports proper drivetrain sealing and alignment

• Designed specifically for MerCruiser Bravo sterndrive systems

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Part Details

• OEM Part Number: 8M0171142

• Supersedes: 86779A1

• Product Type: Input shaft seal carrier / gearcase seal carrier

• Typically includes the oil seal installed in the carrier housing

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Compatible Mercury MerCruiser Drives

Commonly used on MerCruiser Bravo sterndrives, including:

• Bravo One

• Bravo Two

• Bravo Three

Applies across multiple serial number ranges including 0B664190 through current production, depending on configuration.

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Function

The carrier assembly mounts in the front of the sterndrive upper gear housing where the engine coupler connects to the drive. It holds the input shaft oil seal, preventing water from entering the gearcase and stopping gear oil from leaking out during operation.

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Important Compatibility Note

Sterndrive internal components vary by drive model 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.