6D3-12411-00-00 Thermostat 140°F for Yamaha 222 FSH Sport 1900 2024-2026

Thermostat for Yamaha

This thermostat for Yamaha maintains stable engine temperature on the 1900 platform, and it references OEM part 6D3-12411-00-00 with a 140°F opening rating.

Overview

This thermostat for Yamaha controls coolant flow so the engine warms up quickly and holds its target operating range. Sized to the 140°F specification and cross-referenced to 6D3-12411-00-00, it serves owners of the 222 FSH Sport 1900 running 2024 through 2026. A dependable thermostat for Yamaha is a simple safeguard against overheating or cold-running issues.

Built For Performance

• 140°F rated opening temperature
• OEM cross-reference 6D3-12411-00-00 for easy matching
• Sturdy marine-grade construction for cooling system service
• Wax element calibrated to open at the correct point
• Seals properly against the thermostat housing
• Direct replacement for the factory thermostat on the 1900 platform

Fits These Machines

• for Yamaha 222 FSH Sport 1900 (2024-2026)
• for Yamaha 222 FSH Sport (2024-2026)
• for Yamaha 1900 engine platform (2024-2026)

On-The-Job Use

• Routine cooling system service on the 222 FSH Sport 1900
• Fixing overheating or slow warm-up on 1900 series boats
• Pre-season and winterization maintenance on the cooling loop
• Replacing a failed thermostat during engine repair

Specs At A Glance

Good To Know

Q: Does this thermostat fit the 2024-2026 222 FSH Sport 1900? A: It is listed for the 1900 platform across those model years with the 6D3-12411-00-00 reference. Confirm your engine serial number and housing before ordering.

Q: Why does the opening temperature matter? A: A 140°F thermostat keeps the engine within its intended range, supporting proper combustion and cooling. The wrong rating can cause overheating or poor warm-up.

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