8M0174561 Mercury MerCruiser Thermostat Assembly | Genuine Quicksilver OEM Part

🔧 Product Description

Genuine Quicksilver Verado Thermostat Housing Assembly - Part Number: 8M0174561

Genuine Quicksilver thermostat housing assembly used on Mercury Verado outboards. This assembly is used in the cooling system on supported Verado engines and helps regulate engine operating temperature by housing the thermostat and sealing components in the correct position.

⚙️ Key Features

• Genuine Quicksilver OEM thermostat housing assembly

• Correct Mercury part number 8M0174561

• Used on Mercury Verado outboard cooling systems

• Thermostat / housing assembly service component

• Direct replacement where the Verado cooling diagram specifies 8M0174561

• Important part for correct temperature control

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 8M0174561 current OEM thermostat housing assembly reference

OEM / Related Numbers:

• 8M0174561

• Mercury 8M0174561

• Quicksilver 8M0174561

• Verado thermostat housing assembly

• Thermostat assembly

• Thermostat and housing assembly

• Verado cooling thermostat assembly

• 8M0090819 related thermostat assembly family reference for 75HP-115HP applications

• 27-880729 related Verado gasket family reference where specified

Aftermarket / Verified Equivalents:

• Direct aftermarket thermostat housing assemblies may be available by exact 8M0174561 match

• Use genuine or exact-fit housing assemblies where thermostat seating, sensor location or hose routing differs

• Do not substitute a bare thermostat for the complete housing assembly unless the diagram permits separate servicing

🚤 Compatibility

Commonly used on:

• Mercury Verado outboard thermostat housing assemblies

• Mercury L4 and L6 Verado cooling systems where 8M0174561 is specified

• Thermostat housing service on Verado engines with corrosion, leakage or thermostat fault symptoms

Typically suits:

• Engine models:

• Mercury Verado L4 135HP thermostat housing applications where 8M0174561 is specified

• Mercury Verado L4 150HP applications where specified

• Mercury Verado L4 175HP applications where specified

• Mercury Verado L4 200HP applications where specified

• Mercury Verado L6 200HP thermostat housing applications where specified

• Mercury Verado L6 225HP applications where specified

• Mercury Verado L6 250HP applications where specified

• Mercury Verado L6 275HP applications where specified

• Mercury Verado L6 300HP applications where specified

• Mercury Verado L6 350HP applications where specified

• Mercury Verado L6 400HP applications where the cooling diagram lists 8M0174561

• Engine Type: Mercury Verado FourStroke outboard

• System Type: Thermostat housing / cooling-system assembly

• Fitment Note: Match by engine serial number and cooling-system diagram because Verado thermostat assemblies vary by generation and HP.

🔌 Function

The thermostat assembly controls engine temperature by regulating cooling-water flow through the Verado cooling system.

Common signs of failure:

• Engine running too cold or too hot

• Temperature warning or overheat fault

• Corrosion around thermostat housing

• Cooling-water leak at housing

• Thermostat stuck open or closed

• Housing removed and gasket / seal disturbed

📦 Condition

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging