Mercury & Tohatsu Thermostat Gasket 8M0214960 | 853702

Compatible Mercury Applications

Compatible Tohatsu Applications

OEM Part Numbers & Cross References

What This Thermostat Gasket is Used For

This OEM thermostat cover gasket is used to properly seal the thermostat housing during cooling system operation on compatible Mercury and Tohatsu outboards.

Replacing the gasket during thermostat service helps prevent coolant leaks, improper thermostat sealing, and cooling system pressure loss.

Thermostat gaskets are commonly replaced whenever the thermostat housing is removed for inspection, thermostat replacement, or routine maintenance.

Using the correct OEM gasket helps maintain proper fitment and sealing performance in harsh freshwater and saltwater marine environments.

Key Features and Benefits

• Genuine OEM Mercury and Tohatsu thermostat gasket
• Fits many 4HP-30HP FourStroke outboards
• Helps seal thermostat housing properly
• Supports cooling system reliability
• Common replacement during thermostat service
• Designed for marine cooling system environments
• OEM-quality fit and material construction
• Compatible with multiple Mercury and Tohatsu platforms

Thermostat Gasket Details

• Part Type: Thermostat Cover Gasket
• Primary OEM Number: 8M0214960
• Application: Mercury & Tohatsu FourStroke Outboards
• Horsepower Range: 4HP-30HP
• System: Engine Cooling System
• Use: Thermostat housing sealing
• Material: OEM marine gasket material

FAQ

What does this thermostat gasket fit?
This gasket fits many Mercury and Tohatsu-built 4-stroke outboards ranging from 4HP through 30HP depending on model and serial range.

Should I replace the gasket when replacing the thermostat?
Yes. It is recommended to replace the thermostat gasket whenever the thermostat housing is removed to help ensure a proper seal.

Is this an OEM Mercury part?
Yes. This is a genuine OEM-style thermostat gasket cross-referenced to Mercury part number 8M0214960 and related superseded numbers.

Does this fit Tohatsu and Nissan outboards?
Yes. Many Mercury small FourStroke outboards are manufactured by Tohatsu, and this gasket also cross references to several Tohatsu and Nissan Marine part numbers.

Can a damaged thermostat gasket cause cooling issues?
Yes. A leaking or damaged gasket can contribute to improper thermostat operation, coolant leakage, or inconsistent engine temperatures.

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