8M0177107 Mercury MerCruiser 278M0177107 Thermostat Gasket 62Y 12414 01 | Genuine Quicksilver OEM Part

🔧 Product Description

Genuine Quicksilver Thermostat Gasket - Part Number: 27-8M0177107

A genuine Quicksilver thermostat gasket used on selected Mercury FourStroke outboards. This gasket seals the thermostat cover / housing joint and cross-references with Yamaha-style 62Y-12414-01 thermostat gasket applications where Mercury specifies 27-8M0177107.

⚙️ Key Features

• Genuine Quicksilver OEM thermostat gasket

• Correct Mercury part number 27-8M0177107

• Used on selected Mercury 9.9HP to 60HP FourStroke outboards

• Cross-referenced with 62Y-12414-01 style thermostat gasket applications

• Recommended replacement whenever the thermostat cover is removed

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 27-8M0177107 current OEM thermostat gasket reference

OEM / Related Numbers:

• 27-8M0177107

• 8M0177107

• 278M0177107

• 62Y-12414-01

• 62Y1241401

• 62Y-12414-00 related thermostat gasket reference

• 6H3-12414-A1 related thermostat gasket reference

• Mercury thermostat gasket

• Thermostat cover gasket

Aftermarket / Verified Equivalents:

• Aftermarket thermostat gasket equivalents are available where matched to 27-8M0177107 / 62Y-12414-01 applications

🚤 Compatibility

Commonly used on:

• Mercury FourStroke thermostat housing assemblies

• Mercury 9.9HP to 60HP outboard cooling systems

• Thermostat inspection and replacement service where 27-8M0177107 is specified

Typically suits:

• Engine models:

• Mercury 9.9HP FourStroke thermostat applications where 27-8M0177107 is specified

• Mercury 15HP FourStroke thermostat applications where 27-8M0177107 is specified

• Mercury 20HP FourStroke thermostat applications where 27-8M0177107 is specified

• Mercury 25HP FourStroke thermostat applications where 27-8M0177107 is specified

• Mercury 30HP FourStroke thermostat applications where 27-8M0177107 is specified

• Mercury 40HP FourStroke thermostat applications where 27-8M0177107 is specified

• Mercury 50HP FourStroke thermostat applications where 27-8M0177107 is specified

• Mercury 60HP FourStroke thermostat applications where 27-8M0177107 is specified

• Mercury 40HP EFI FourStroke cooling applications where specified

• Mercury 50HP EFI FourStroke cooling applications where specified

• Mercury 60HP EFI FourStroke cooling applications where specified

• Mercury / Mariner FourStroke thermostat covers using the 62Y-12414-01 style gasket

• HP Range: commonly 9.9HP - 60HP where specified

• Engine Type: Mercury / Mariner FourStroke outboard

• System Type: Thermostat cover gasket / cooling-system gasket

🔌 Function

The gasket seals the thermostat cover to the housing, preventing cooling-water leakage around the thermostat cavity and helping maintain correct thermostat operation.

Common signs of failure:

• Water leaking from thermostat cover

• Gasket torn during thermostat removal

• Salt build-up around thermostat housing

• Overheating after thermostat service due to poor sealing

• Thermostat inspection requires gasket replacement

• Cover removed and gasket cannot be reused safely

📦 Condition

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging