6D3-12411-00-00 Thermostat 140°F for Yamaha 275SE 1800 2019-2026

Thermostat for Yamaha 275SE 1800

This 140°F thermostat, OEM cross-reference 6D3-12411-00-00, regulates coolant flow on Yamaha 275SE 1800 watercraft to maintain proper engine operating temperature.

Overview

This thermostat is a direct replacement temperature control component for the Yamaha 275SE 1800, opening at 140°F to manage coolant circulation as engine heat rises. It serves boat owners performing routine cooling system service or replacing a failed thermostat on their Yamaha 275SE 1800. Built to OEM cross-reference 6D3-12411-00-00, it restores proper warm-up and temperature regulation.

Built For Performance

• 140°F opening temperature matches factory cooling system specification
• OEM cross-reference 6D3-12411-00-00 for direct fitment
• Metal construction resists corrosion in marine cooling systems
• Seals and seats to regulate coolant flow under operating pressure
• Consistent opening and closing for stable engine temperature

Fits These Machines

• for Yamaha 275SE 1800, 2019-2026

On-The-Job Use

• Routine cooling system maintenance on personal watercraft
• Replacing a stuck or failed thermostat
• Restoring proper engine warm-up after storage
• Seasonal service before launching

Specs At A Glance

Good To Know

Q: Does this thermostat fit my Yamaha 275SE 1800? A: It is cross-referenced to OEM part 6D3-12411-00-00 for the 275SE 1800, but confirm your model and serial number before ordering.

Q: Why does the opening temperature matter? A: A 140°F thermostat is matched to the factory cooling system so the engine reaches and holds its intended operating temperature.

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