0312714 BRP Thermostat Cover | Genuine Used Part

🔧 Product Description

Genuine BRP Johnson Evinrude Thermostat Cover - Part Number: 0312714

A genuine used BRP / OMC thermostat cover for selected Johnson and Evinrude 6HP two-stroke outboards.

The cover closes the thermostat cavity in the cylinder-head cooling passage and retains the thermostat, seal and cap gasket. It is an early OMC cooling-system component used across the corresponding 1960s and 1970s 6HP engine family.

⚙️ Key Features

• Genuine BRP / OMC Johnson Evinrude OEM thermostat cover
• Correct OMC part number 0312714
• Used on selected Johnson and Evinrude 6HP two-stroke outboards
• Retains the thermostat and thermostat seal within the cylinder head
• Direct-fit cast cover for the original cooling-system arrangement

🚤 Compatibility

Commonly used on

• Johnson and Evinrude 6HP two-stroke cylinder-head cooling systems
• Early OMC thermostat assemblies using cover 0312714

Typically suits

• Engine models:
• Johnson 6HP two-stroke models produced approximately 1966-1979
• Evinrude 6HP two-stroke models produced approximately 1966-1979
• 1968 Johnson CD-25R 6HP
• 1969 Evinrude 6902M 6HP
• 1971 Johnson 6R71G 6HP
• HP Range: 6HP
• Engine Type: Johnson / Evinrude twin-cylinder two-stroke outboard
• Year Range: Approximately 1966 - 1979

🔌 Function

The cover seals the thermostat cavity and keeps the thermostat and seal correctly positioned. This allows cooling water to be regulated through the cylinder head as the engine warms and reaches operating temperature.

⚠️ Common Signs of Failure

• Cooling water leaks around the cover or gasket
• Cover is cracked, corroded or distorted
• Gasket face is pitted or warped
• Thermostat cannot be retained securely
• Engine overheats or runs excessively cold because the thermostat cavity does not seal correctly

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 0312714 current known OMC thermostat-cover reference
• 312714 original unprefixed OMC reference

OEM / Related Numbers

• 0312714
• 312714
• 0311145 related thermostat-cover gasket
• 0310058 related thermostat seal
• 0308742 related cover screw
• 0378065 → 0393659 → 0437414 → 0434841 → 5005440 related thermostat service chain

Aftermarket / Verified Equivalents

• No aftermarket equivalent

📦 Condition

• Genuine used part
• Removed from running engine where applicable
• In good working condition unless otherwise stated