For Mercury Marine Mercruiser Thermostat 143° 833072003 115-250HP 833072 5005440

Thermostat for Mercury Marine Mercruiser

This thermostat for Mercury Marine Mercruiser engines maintains optimal engine temperature by opening at 143°, and it is a direct replacement for OEM cross-reference numbers 833072003, 833072, and 5005440.

Overview

This thermostat is a precision cooling component designed for Mercury Marine Mercruiser engines in the 115-250HP range. It regulates coolant flow to keep the engine at its ideal 143° operating temperature, ensuring efficient combustion and preventing overheating. Whether for outboard or stern drive applications, this thermostat for Mercury Marine Mercruiser delivers reliable performance for marine power.

Built For Performance

• Thermostat opens at 143° for precise temperature control
• Compatible with Mercury Marine Mercruiser engines rated 115-250HP
• Direct replacement for OEM part numbers 833072003, 833072, and 5005440
• Corrosion-resistant construction for marine environments
• Ensures consistent engine warm-up and cooling efficiency
• Factory-tested for reliable operation in saltwater and freshwater

On-The-Job Use

• Maintains optimal engine temperature during long cruising sessions
• Prevents engine overheating in demanding marine conditions
• Supports quick warm-up for reliable starts on the water
• Ideal for boats with Mercury Marine Mercruiser engines in the 115-250HP class

Specs At A Glance

Good To Know

Q: How do I know if this thermostat fits my engine? A: This thermostat is designed for Mercury Marine Mercruiser engines within the 115-250HP range, and it matches OEM part numbers 833072003, 833072, and 5005440. Always verify your engine's serial number to confirm compatibility.

Q: What does the 143° rating mean? A: The 143° rating indicates the temperature at which the thermostat begins to open, allowing coolant to flow and maintain optimal engine temperature. This ensures your engine warms up quickly and runs efficiently.

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