6D3-12411-00-00 Thermostat 140°F for Yamaha SX 190 1800 2012-2023

Thermostat for Yamaha SX 190 1800

This 140°F thermostat, OEM cross-reference 6D3-12411-00-00, regulates coolant flow to keep your Yamaha SX 190 1800 engine at the correct operating temperature.

Overview

This thermostat for Yamaha SX 190 1800 is a replacement temperature-regulating valve for your personal watercraft cooling system. It opens and closes at 140°F to keep engine temperatures stable during every ride. Built for riders who want a reliable replacement thermostat that matches the OEM 6D3-12411-00-00 specification.

Built For Performance

• 140°F opening temperature matched to Yamaha 1800 engine cooling requirements
• OEM cross-reference 6D3-12411-00-00 for a direct-fit replacement
• Thermal valve regulates coolant flow to prevent overheating and cold-running
• Durable construction suited to the heat cycling of a marine cooling system
• Drops into the factory thermostat housing location without modification

Fits These Machines

• for Yamaha SX 190 1800 (2012-2023)

On-The-Job Use

• Routine cooling system maintenance on your SX 190 1800
• Replacing a stuck or seized thermostat that causes overheating
• Restoring proper warm-up behavior so the engine reaches operating temperature
• Freshwater and saltwater riding where coolant temperature control matters

Specs At A Glance

Good To Know

Q: How do I know if my thermostat needs replacing? A: Common signs include overheating, slow warm-up, or erratic temperature readings on your SX 190 1800. A thermostat stuck open or closed is the usual cause.

Q: Does the 140°F rating matter? A: Yes, the opening temperature must match your engine's design so coolant flows at the right time. This unit is rated at 140°F to meet that requirement.

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