6D3-12411-00-00 Thermostat 140°F for Yamaha FX HO 1900 2024-2026

Thermostat for Yamaha FX HO 1900

This thermostat, OEM cross-reference 6D3-12411-00-00, controls engine coolant temperature at 140°F on Yamaha FX HO 1900 watercraft for the 2024 through 2026 model years.

Overview

This replacement thermostat for Yamaha FX HO 1900 manages coolant circulation so the engine warms to and maintains its 140°F operating range. The 6D3-12411-00-00 cross-reference simplifies matching it to a tired original component. It is aimed at riders handling cooling system upkeep on their personal watercraft.

Built For Performance

• 140°F opening temperature matches the specified rating
• OEM cross-reference 6D3-12411-00-00 for easy matching
• Regulates coolant flow to keep engine temperature stable
• Direct replacement for the factory thermostat location
• Constructed for repeated marine cooling system cycles

Fits These Machines

• for Yamaha FX HO 1900, 2024-2026

On-The-Job Use

• Routine cooling system service on personal watercraft
• Replacing a thermostat stuck open or closed
• Restoring proper warm-up and temperature control
• Pre-season maintenance before hitting the water

Specs At A Glance

Good To Know

Q: What are signs my thermostat has failed? A: Slow warm-up, overheating, or unsteady temperature readings can point to a bad thermostat. If the engine struggles to reach or hold normal temperature, replacement is often the fix.

Q: Will this fit every model year listed? A: It is listed for the Yamaha FX HO 1900 from 2024 through 2026. Check your model and serial number before ordering to confirm compatibility.

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