6D3-12411-00-00 Thermostat for Yamaha 212 X 1800 2012-2020 140°F

Thermostat for Yamaha 212 X 1800

This replacement thermostat for Yamaha 212 X 1800 boats regulates engine coolant temperature at 140 degrees Fahrenheit and carries OEM cross-reference 6D3-12411-00-00.

Overview

This thermostat for Yamaha 212 X 1800 watercraft controls coolant flow to keep the engine at a stable 140 degrees Fahrenheit operating temperature. The 6D3-12411-00-00 cross-reference makes it a direct-fit replacement for tired or stuck factory thermostats. It suits boat owners handling their own seasonal maintenance.

Built For Performance

• Opens at a calibrated 140 degrees Fahrenheit to hold steady engine temperature
• Cross-references OEM part number 6D3-12411-00-00 for confident fitment
• Sealed wax element construction for consistent cycling
• Direct replacement for the factory thermostat in the 1800 engine
• Compact housing profile matches the original mounting location
• Built to marine-grade tolerances for corrosion resistance

Fits These Machines

• for Yamaha 212 X 1800, 2012-2020

On-The-Job Use

• Routine cooling system refresh on 212 X 1800 boats
• Replacing a thermostat stuck open that keeps the engine running cold
• Replacing a thermostat stuck closed that causes overheating
• Pre-season or end-of-season engine maintenance

Specs At A Glance

Good To Know

Q: How do I know if my thermostat needs replacing? A: Hard starting, an engine that never reaches normal temperature, or overheating after warm-up are common signs the thermostat is stuck. Replacing it restores proper coolant regulation.

Q: Does this thermostat fit any 1800 engine? A: It is cross-referenced to 6D3-12411-00-00 and listed for the 212 X 1800 from 2012 to 2020. Check your model and serial number before ordering.

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