Mercury MerCruiser / Quicksilver Timing Cover – 8M0181746

Protect critical engine timing components with the genuine Mercury Marine / Quicksilver 8M0181746 Timing Cover. This OEM front timing cover assembly encloses the timing chain or timing gears and helps seal the front of the engine block while protecting internal components from contaminants and oil leaks.

Manufactured to Mercury Marine’s original equipment specifications, this newer-style composite timing cover includes a provision for a crankshaft position sensor, supporting modern fuel-injected MerCruiser engine systems.

Key Features

• Genuine Mercury / Quicksilver OEM timing cover

• Protects timing chain / gear assembly at the front of the engine

• Includes provision for crankshaft position sensor

• Durable composite construction designed for marine engines

• Helps maintain a tight oil seal at the front of the engine block

Part Details

• OEM Part Number: 8M0181746

• UPC: 745061696785

• Product Type: Engine timing cover / front cover assembly

Supersedes

• 863396

• 863396001

• 8M0150310

Compatible Mercury MerCruiser Engines

Commonly used on GM-based MerCruiser V8 engines, including:

• 5.0L (305 CID) V8 engines

• 5.7L (350 CID) V8 engines

• 6.2L MPI V8 engines

• 350 MAG MPI / Horizon engines

• 383 MAG Stroker engines

These engines are typically found in MerCruiser sterndrive and inboard applications with Alpha or Bravo drives depending on configuration.

Function

The timing cover seals the front of the engine block, protecting the timing chain or timing gear assembly while also supporting the front crankshaft seal and sensor mounting. Proper sealing prevents oil leaks and protects the timing components from dirt, water, and debris.

Important Compatibility Note

Timing covers vary by engine family, crank sensor configuration, and serial number range. Always verify compatibility using the engine serial number before ordering to ensure the correct replacement part.