Thermostat for Yanmar 1GM, 2GM, 3GM, 1GM10, 2GM20, 3GM30, Replaces: 105582-49200

Thermostat for Yanmar

This thermostat for Yanmar marine diesel engines regulates coolant flow to maintain a stable operating temperature, serving as a direct replacement for OEM part number 105582-49200 in 1GM, 2GM, 3GM, 1GM10, 2GM20, and 3GM30 models.

Overview

This thermostat for Yanmar is designed for the 1GM, 2GM, 3GM, 1GM10, 2GM20, and 3GM30 engine family. It opens and closes with coolant temperature to keep the engine from running too hot or too cold. A dependable replacement thermostat for Yanmar matches OEM 105582-49200 specifications.

Built For Performance

• Direct replacement for OEM 105582-49200
• Precise temperature response for efficient engine operation
• Corrosion-resistant construction suited to marine environments
• Engineered to match Yanmar cooling system requirements
• Built for long service life in continuous-use engines

Fits These Machines

• for Yanmar 1GM
• for Yanmar 2GM
• for Yanmar 3GM
• for Yanmar 1GM10
• for Yanmar 2GM20
• for Yanmar 3GM30

On-The-Job Use

• Keeping auxiliary sailboat engines at proper operating temperature
• Preventing overheating during extended motoring in calm seas
• Supporting steady cooling in small marine diesel installations
• Helping maintain consistent engine warmth under varying loads

Specs At A Glance

Good To Know

Q: Why should this thermostat be replaced? A: A worn thermostat can cause cold starts, overheating, or poor engine performance, so replacing it restores proper cooling system behavior.

Q: How is fitment confirmed? A: Verify the engine model and serial number against the listed Yanmar 1GM, 2GM, 3GM, 1GM10, 2GM20, and 3GM30 applications before ordering.

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