6D3-12411-00-00 Thermostat 140°F for Yamaha 252 FSH Sport 1800 2021-2023

Thermostat for Yamaha 252 FSH Sport 1800

This 140°F thermostat, OEM cross-reference 6D3-12411-00-00, regulates coolant flow to keep your engine at stable operating temperature.

Overview

This thermostat for Yamaha 252 FSH Sport 1800 boats controls coolant circulation so the engine reaches and holds its correct running temperature. The 140°F rating and 6D3-12411-00-00 cross-reference make it a direct replacement for the original thermostat on compatible models. It suits owners performing routine cooling system service or replacing a stuck or failed thermostat.

Built For Performance

• 140°F opening temperature matched to factory cooling specs
• OEM cross-reference 6D3-12411-00-00 for direct fitment
• Wax-pellet design opens and closes reliably across temperature swings
• Sealed housing resists coolant corrosion over time
• Restores proper warm-up and temperature regulation

Fits These Machines

• for Yamaha 252 FSH Sport 1800, 2021-2023

On-The-Job Use

• Routine cooling system maintenance on 252 FSH Sport 1800 boats
• Replacing a thermostat stuck open or closed
• Engine overheat diagnosis and repair
• Pre-season service before launching

Specs At A Glance

Good To Know

Q: How do I know if my thermostat needs replacing? A: Common signs include slow engine warm-up, overheating, or erratic temperature readings. A thermostat stuck open or closed will affect cooling performance.

Q: Does this thermostat come with a gasket? A: Check the listing contents for included hardware. A new gasket or seal is often recommended during installation.

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