# 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

## Details

- **Price:** 15.38 AUD
- **Vendor:** Quicksilver
- **Tags:** Quicksilver Marine Parts | Oils Service Kits & Engine Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 15.38 AUD | In stock |

## Images

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

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/8m0177107-mercury-mercruiser-278m0177107-thermostat-gasket-62y-12414-01-genuine-quicksilver-oem-part)
> Updated: 2026-08-03