Thermostat 130°F For Mercury 200-250 HP Replacement 8M0057307 885599003 18-3535

Thermostat 130°F for Mercury

This 130°F thermostat is a replacement for Mercury outboard engines rated at 200 to 250 horsepower, regulating engine temperature for optimal performance. It replaces OEM part numbers 8M0057307, 885599003, and 18-3535.

Overview

This thermostat maintains proper engine temperature at 130°F for Mercury outboards in the 200-250 HP range. It ensures the engine warms up quickly and stays within the ideal temperature window. This direct replacement part restores cooling system efficiency.

Built For Performance

• Opens at 130°F to regulate coolant flow
• Meets or exceeds original equipment specifications
• Compatible with multiple Mercury part numbers
• Durable construction for long service life in marine conditions
• Prevents overheating and improves fuel efficiency

On-The-Job Use

• For Mercury outboard engines with 200-250 horsepower
• Ideal for saltwater and freshwater use
• Replaces worn thermostats to avoid overheating
• Works with both two-stroke and four-stroke Mercury models
• Easy to install during routine cooling system maintenance

Specs At A Glance

Good To Know

Q: Is this thermostat exactly 130°F? A: Yes, it opens at 130°F to keep your Mercury running at the correct temperature.

Q: Will this fit my Mercury 225 Optimax? A: It is designed for 200-250 HP Mercury outboards, but always double-check your engine's thermostat specifications 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.