6D3-12411-00-00 Thermostat 140°F for Yamaha 275SDX 1800 2023

Thermostat for Yamaha 275SDX 1800

The thermostat with OEM cross-reference 6D3-12411-00-00 regulates coolant flow in the 2023 Yamaha 275SDX 1800, holding engine temperature near the 140°F set point for consistent operation.

Overview

This replacement thermostat for Yamaha 275SDX 1800 keeps coolant at the correct operating range so the engine warms up quickly and runs at a stable temperature. The 140°F rating and 6D3-12411-00-00 cross-reference make it a direct-fit option for owners performing routine cooling system service. It suits anyone replacing a stuck or slow thermostat on this model.

Built For Performance

• 140°F opening temperature matched to the factory cooling specification
• OEM cross-reference 6D3-12411-00-00 for straightforward part matching
• Wax-pellet design opens and closes with coolant temperature changes
• Metal construction resists corrosion in closed-loop cooling systems
• Sealing flange helps prevent coolant bypass when the valve is closed

Fits These Machines

• for Yamaha 275SDX 1800, 2023

On-The-Job Use

• Routine cooling system maintenance on the 2023 275SDX 1800
• Replacing a thermostat that sticks open and causes slow warm-up
• Replacing a thermostat that sticks closed and causes overheating
• Cooling system refresh during winterization or spring prep

Specs At A Glance

Good To Know

Q: How do I know if my thermostat needs replacing? A: Slow warm-up, overheating, or erratic temperature readings on the 275SDX 1800 often point to a thermostat that no longer opens or closes correctly. Comparing the old part number against 6D3-12411-00-00 confirms the match.

Q: Does the 140°F rating matter? A: Yes, the opening temperature must match the engine's cooling specification so the ECM sees the expected warm-up behavior. A thermostat rated for a different temperature can cause rich running or overheating.

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