Part Number: 710-27-8M0204687
Mercury 27-8M0204687 Thermostat Gasket
Ensure a reliable seal and proper cooling system performance with the Mercury 27-8M0204687 Thermostat Gasket. Designed as a genuine OEM replacement, this gasket creates a secure seal between the thermostat housing and cooling system components to help prevent coolant leaks and maintain stable engine operating temperatures.
A thermostat gasket may be small, but it plays an important role in maintaining cooling system pressure and proper coolant circulation. Over time, gaskets can become brittle, compressed, or damaged from repeated heat cycles and coolant exposure. Replacing the gasket during thermostat service helps prevent leaks and ensures dependable cooling system operation.
Manufactured to Mercury Marine factory specifications, the 27-8M0204687 gasket is built using durable marine-grade materials designed to withstand harsh engine compartment conditions. Designed as a direct-fit replacement, it provides reliable sealing performance and straightforward installation for compatible Mercury and MerCruiser engines.
Common Engine Fitments
The Mercury 27-8M0204687 thermostat gasket is commonly used on select MerCruiser and Mercury Marine engines, including:
- MerCruiser 4.5L MPI
- MerCruiser 6.2L MPI
- MerCruiser 350 MAG
- MerCruiser 377 MAG
- MerCruiser 8.2 MAG
- Mercury Racing sterndrive engine applications
These engines are frequently found in:
- Sea Ray sport boats and cruisers
- Chaparral SSX and SSi models
- Four Winns Horizon series
- Crownline bowriders and cruisers
- Regal sport boats
- Formula performance boats
The 27-8M0204687 gasket is commonly used in thermostat housing assemblies on freshwater and closed-cooling MerCruiser systems where maintaining proper coolant sealing is essential for engine reliability.
Fitment may vary depending on engine serial number and cooling system configuration, so confirming compatibility with part number 27-8M0204687 before ordering is recommended.
Key Features
- Genuine Mercury Marine OEM thermostat gasket
- Helps maintain proper cooling system sealing
- Prevents coolant leaks and pressure loss
- Designed for MerCruiser and Mercury Marine engines
- Marine-grade material built for durability
- Direct-fit replacement for easy installation
Why Replace a Thermostat Gasket?
Old gaskets can lose flexibility and sealing ability over time, especially in high-heat marine environments. Replacing the gasket during thermostat service helps maintain cooling system efficiency and reduces the risk of leaks that could lead to overheating issues.
If you’re servicing a compatible MerCruiser-powered boat, the Mercury 27-8M0204687 thermostat gasket delivers the OEM-quality fit and dependable sealing performance your cooling system depends on.