THERMOSTAT AY 394408 0434137 434137 18-3500 Replaces For Johnson Evinrude OMC

Thermostat Assembly for Johnson Evinrude OMC

This thermostat assembly for Johnson Evinrude OMC outboards replaces OEM part numbers 394408, 0434137, 434137 and part 18-3500 to control engine operating temperature.

Overview

This thermostat assembly is a replacement cooling system component for Johnson Evinrude OMC outboard engines. It opens and closes to regulate coolant flow and maintain proper operating temperature. This thermostat assembly suits marine mechanics and boat owners servicing Johnson Evinrude OMC engines.

Built For Performance

• Direct replacement thermostat assembly for Johnson Evinrude OMC engines
• Cross-references OEM numbers 394408, 0434137, and 434137
• Replaces aftermarket part number 18-3500
• Regulates engine coolant flow for consistent operating temperature
• Built for marine cooling system service

On-The-Job Use

• Installed in the outboard cooling system to regulate engine temperature
• Used during thermostat replacement on Johnson Evinrude OMC outboards
• Commonly serviced during impeller and cooling system maintenance

Specs At A Glance

Good To Know

Q: Does this thermostat assembly fit my engine? A: Compare the existing thermostat part number with 394408, 0434137, 434137, or 18-3500 and confirm the engine serial number for Johnson Evinrude OMC compatibility before ordering.

Q: Is this thermostat assembly an OEM part? A: This is an aftermarket replacement with cross-references for Johnson Evinrude OMC, not an original branded item. Verify the application before purchase.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.