2753045 Mercury MerCruiser Gasket | Genuine Quicksilver OEM Part

🔧 Product Description

Genuine Quicksilver Thermostat Housing to Manifold Gasket - Part Number: 27-530451

A genuine Quicksilver thermostat housing to intake manifold gasket for GM-based MerCruiser V6 and V8 sterndrive and inboard engines. This gasket seals the thermostat housing to the manifold, helping prevent coolant or raw-water leakage at the thermostat housing joint.

⚙️ Key Features

• Genuine Quicksilver OEM gasket

• Correct current Mercury service reference 27-530451

• Supersedes earlier 27-53045 gasket reference

• Thermostat housing to intake manifold gasket

• Also cross-references with Volvo Penta GM-based V6 / V8 thermostat housing gasket applications where specified

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 27-530451 → Supersedes 27-53045

• 27-53045 earlier OEM thermostat housing gasket reference

• 27-33179 related earlier thermostat housing gasket reference where specified

OEM / Related Numbers:

• 27-530451

• 530451

• 27-53045

• 53045

• 2753045

• 27-33179

• 33179

• 27-53045-1 formatted listing reference

Aftermarket / Verified Equivalents:

• Sierra: 18-2917

• Volvo Penta: 3852111

• Volvo Penta: 3701777

• Recmar-style aftermarket gasket equivalents exist for 27-53045 / 27-530451 applications

🚤 Compatibility

Commonly used on:

• MerCruiser GM V6 and V8 thermostat housing to intake manifold applications

• GM-based MerCruiser sterndrive and inboard cooling systems

Typically suits:

• Engine models:

• MerCruiser 4.3L GM V6 thermostat housing to manifold applications where 27-530451 is specified

• MerCruiser 4.3LX GM V6 thermostat housing to manifold applications where 27-530451 is specified

• MerCruiser 5.0L GM 305 V8 thermostat housing to intake manifold applications where specified

• MerCruiser 5.7L GM 350 V8 thermostat housing to intake manifold applications where specified

• MerCruiser 350 MAG GM 350 V8 thermostat housing gasket applications where specified

• MerCruiser 6.2L / 377 CID GM V8 thermostat housing gasket applications where specified

• MerCruiser MCM GM V6 and V8 sterndrive engines using thermostat housing gasket 27-53045 / 27-530451

• MerCruiser MIE GM V6 and V8 inboard engines using thermostat housing gasket 27-53045 / 27-530451

• Volvo Penta GM-based V6 and V8 applications using equivalent thermostat housing gasket 3852111 where specified

• Engine Type: MerCruiser GM V6 / V8 petrol sterndrive and inboard

• System Type: Thermostat housing to intake manifold gasket

• Fitment Note: This gasket is matched by thermostat housing and manifold style, so final fitment should be checked against the serial-numbered cooling-system diagram.

🔌 Function

The gasket seals the thermostat housing to the manifold, preventing water or coolant leakage and helping the cooling system maintain correct flow through the thermostat housing.

Common signs of failure:

• Water leak around thermostat housing

• Corrosion or staining at housing base

• Cooling-system seepage after thermostat service

• Gasket torn during housing removal

• Poor sealing after thermostat housing replacement

📦 Condition

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging