6D3-12411-00-00 Thermostat 140°F for Yamaha 222 FSH Sport E 1800 2023

Thermostat for Yamaha

This thermostat for Yamaha marine engines regulates coolant flow to keep operating temperature steady, and it carries the OEM cross-reference 6D3-12411-00-00 with a 140°F rating.

Overview

This thermostat for Yamaha is a direct-fit replacement that controls when coolant circulates through the engine so it reaches and holds proper operating temperature. Built to the 140°F rating specified for the 1800 platform, it suits boat owners handling routine maintenance on the 222 FSH Sport E. A reliable thermostat for Yamaha helps prevent overheating and supports consistent engine performance on the water.

Built For Performance

• 140°F temperature rating matches the original specification
• OEM cross-reference 6D3-12411-00-00 for straightforward verification
• Robust housing construction resists the demands of marine cooling systems
• Internal wax element opens and closes at the correct threshold
• Designed for a sealed fit against the thermostat housing
• Direct replacement for the factory thermostat in the 1800 engine platform

Fits These Machines

• for Yamaha 222 FSH Sport E 1800 (2023)
• for Yamaha 222 FSH Sport E (2023)
• for Yamaha 1800 engine platform (2023)

On-The-Job Use

• Routine cooling system maintenance on the 222 FSH Sport E
• Resolving overheating or slow warm-up on 1800 series boats
• Winterizing and spring commissioning service on the cooling loop
• Replacing a stuck or failed thermostat during engine repair

Specs At A Glance

Good To Know

Q: Will this thermostat fit my 2023 222 FSH Sport E? A: It is listed to fit the 1800 platform on that model year with the 6D3-12411-00-00 reference. Confirm your engine serial number and thermostat housing before ordering.

Q: What temperature does this thermostat open at? A: This unit is rated to open at 140°F, matching the original specification. Using the correct rating keeps the engine in its intended operating range.

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