3831425 Replaces For Volvo Penta AQD40A TMD40A TAMD40B Marine Engine Thermostat

Marine Engine Thermostat for Volvo Penta

This marine engine thermostat replaces OEM part number 3831425 and regulates coolant flow to maintain proper operating temperature in Volvo Penta marine engines.

Overview

This marine engine thermostat is a direct replacement for Volvo Penta models AQD40A, TMD40A, and TAMD40B. It ensures consistent engine temperature by opening and closing at the correct threshold, protecting your marine engine from overheating. Engineered for reliable performance in saltwater and freshwater conditions.

Built For Performance

• Precision-calibrated opening temperature for optimal engine efficiency
• Corrosion-resistant stainless steel and brass construction
• Direct OEM fitment for Volvo Penta AQD40A, TMD40A, and TAMD40B
• Robust spring mechanism ensures reliable operation under load
• Includes gasket for a leak-free seal
• Tested to meet marine engine cooling standards

Fits These Machines

• for Volvo Penta AQD40A
• for Volvo Penta TMD40A
• for Volvo Penta TAMD40B

On-The-Job Use

• Maintains optimal engine temperature during long cruising hours
• Prevents overheating in heavy-load conditions
• Ensures quick warm-up for reliable starts in cold water
• Works in both saltwater and freshwater marine environments

Specs At A Glance

Good To Know

Q: How do I know if my thermostat needs replacement? A: If your engine overheats or runs too cool, the thermostat may be stuck open or closed. Replacing it with this OEM-style part restores proper cooling.

Q: Can I install this thermostat myself? A: Yes, with basic tools and a new gasket, it typically takes under an hour. Always follow the manufacturer's torque specs.

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