Mercury / MerCruiser Quicksilver Water Inlet Housing — 8M0111791

The Mercury Quicksilver 8M0111791 Water Inlet Housing is a genuine OEM cooling system inlet connector used on select MerCruiser sterndrive engines. It connects the water pickup tube to the engine’s cooling system, allowing raw water to enter the engine for proper cooling during operation.

Key Specifications

• Part Number: 8M0111791

• Component Type: Water inlet housing / cooling system connector

• System: Engine raw-water cooling system

• OEM Brand: Mercury Marine / Quicksilver

• UPC: 745061003149

Compatible Engines / Applications

Commonly used on MerCruiser sterndrive engine packages, including:

• 4.5L MPI 200 Alpha / Bravo

• 4.5L MPI 250 Alpha / Bravo

• 6.2L MPI 300

• 6.2L MPI 350

Also used on various Bravo-series sterndrives and integrated transom systems depending on serial number range.

Function

The water inlet housing connects the raw water pickup tube from the transom assembly to the engine cooling system. It allows cooling water drawn from outside the boat to enter the engine where it circulates through the cooling passages.

Proper operation ensures:

• Adequate engine cooling water supply

• Stable engine operating temperature

• Reliable cooling system performance

Service Notes

A damaged or worn inlet housing may cause:

• Cooling water leaks

• Reduced cooling water flow

• Potential engine overheating

Replacing the housing helps maintain proper cooling system integrity.

Fitment Tip:
Always verify compatibility using the engine and sterndrive serial number. Cooling system connectors can vary depending on the engine model, transom assembly design, and production range.