Mercury MerCruiser Poppet Valve Assembly 8M0114707

Mercury / MerCruiser Quicksilver Poppet Valve Assembly — 8M0114707

The Mercury Quicksilver 8M0114707 Poppet Valve Assembly is a genuine OEM engine cooling system valve used on select Mercury outboard engines, including Verado platforms. The valve regulates cooling water flow through the engine to maintain proper operating temperature across different RPM ranges.

Key Specifications

• Part Number: 8M0114707

• Component Type: Cooling system poppet valve assembly

• System: Engine raw-water cooling system

• OEM Brand: Mercury Marine / Quicksilver

• UPC: 745061962248

Compatible Engines / Applications

Commonly used on Mercury outboard engines, including:

• 135–200 HP L4 Mercury outboards

• 200–400 HP L6 Verado engines

These engines are typically found on center consoles, sport boats, and offshore fishing vessels.

Function

The poppet valve regulates cooling water flow through the engine block depending on engine speed and cooling demand. At lower RPM the valve restricts flow to maintain proper engine temperature, while at higher RPM it opens to allow increased water circulation.

This helps ensure:

• Stable engine operating temperature

• Proper cooling efficiency at high RPM

• Protection against overheating or over-cooling

Symptoms of a Faulty Poppet Valve

A worn or stuck poppet valve may cause:

• Engine overheating at idle or low RPM

• Fluctuating engine temperature readings

• Reduced cooling system efficiency

Replacing the poppet valve assembly restores proper cooling system operation.

⚠️ Fitment Tip:
Always verify compatibility using the engine model and serial number. Mercury outboard engines use different poppet valve assemblies depending on the engine family and production range.