6D3-12411-00-00 Thermostat 140°F for Yamaha SX 190 1900 2024-2026

Thermostat for Yamaha SX 190 1900

This replacement thermostat, OEM cross-reference 6D3-12411-00-00, regulates engine coolant temperature at 140°F so the 1900 engine in the SX 190 reaches and holds its proper operating range.

Overview

This 140°F thermostat for Yamaha SX 190 1900 watercraft controls coolant flow to keep engine temperatures stable during operation. It swaps in for the original part referenced as 6D3-12411-00-00, making it a direct-fit replacement for routine cooling system service. It suits owners performing their own maintenance on 2024 through 2026 models.

Built For Performance

• 140°F opening temperature matched to the specified cooling range
• OEM cross-reference 6D3-12411-00-00 for straightforward replacement
• Seals and opens consistently to maintain stable engine temperature
• Construction suited to marine coolant and constant vibration
• Direct fit into the factory thermostat housing location

Fits These Machines

• for Yamaha SX 190 1900, 2024-2026

On-The-Job Use

• Routine cooling system maintenance and thermostat replacement
• Restoring proper warm-up and temperature regulation on the water
• Servicing engines that run cold or overheat from a stuck thermostat
• Seasonal prep before launching the watercraft

Specs At A Glance

Good To Know

Q: How do I know if my thermostat needs replacing? A: Symptoms like slow warm-up, overheating, or erratic temperature readings often point to a stuck thermostat. Replacing it with the correct 140°F unit restores normal coolant regulation.

Q: Does this thermostat include a gasket or seal? A: Check your service manual for the seals required during installation and confirm what is included before ordering. Reusing worn seals can cause coolant leaks.

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