6D3-12411-00-00 Thermostat 140°F for Yamaha AR 250 1900 2024-2026 Boat

Thermostat for Yamaha

This 140°F thermostat for Yamaha marine engines replaces OEM part 6D3-12411-00-00, regulating coolant flow to keep operating temperatures stable.

Overview

This thermostat for Yamaha controls coolant circulation so the engine reaches and holds its proper operating temperature. It is a direct replacement for OEM 6D3-12411-00-00, rated at 140°F. Ideal for owners servicing a Yamaha AR 250 1900 jet boat.

Built For Performance

• 140°F opening temperature matches factory specification
• OEM cross-reference 6D3-12411-00-00 for direct replacement
• Regulates coolant flow to prevent overheating and cold-running issues
• Seals into the stock housing without modification
• Suits marine cooling systems exposed to constant moisture

Fits These Machines

• for Yamaha AR 250 1900
• for Yamaha 1900 series models using OEM 6D3-12411-00-00

On-The-Job Use

• Routine cooling system servicing
• Overheating diagnosis and repair
• Pre-season maintenance on jet boats
• Replacing a stuck or failed thermostat

Specs At A Glance

Good To Know

Q: Will this fit my 2024-2026 Yamaha AR 250? A: It is intended for Yamaha AR 250 1900 models from 2024 through 2026. Confirm your serial number and current thermostat part number before ordering.

Q: Does this come with a gasket? A: This listing covers the thermostat itself. Reuse or replace the housing gasket as your service manual specifies.

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