855676A1 855676003 855676 Thermostat 60°/140F For Mercury 4T 15-90HP 18-3541

Thermostat 60°/140F for Mercury

This thermostat for Mercury 4-stroke outboards opens at 60°C/140°F to maintain optimal engine temperature, and it matches OEM cross-reference numbers 855676A1, 855676003, and 18-3541.

Overview

The thermostat for Mercury 4T outboards controls coolant flow to keep the engine within its ideal temperature range. Designed for Mercury 4-stroke engines from 15 to 90 horsepower, this thermostat ensures consistent performance even under heavy load. Its 60°/140F rating matches the factory specification for reliable thermal regulation.

Built For Performance

• Precision-engineered to open at exactly 60°C/140°F
• Constructed from corrosion-resistant materials for marine use
• Direct replacement for the original thermostat
• Helps prevent overheating and engine damage
• Compatible with Mercury 4-stroke outboard engines

Specs At A Glance

Good To Know

Q: What is the opening temperature of this thermostat? A: It opens at 60°C/140°F to maintain the engine's proper operating temperature.

Q: Will this fit my Mercury 90HP 4-stroke? A: This thermostat is designed for Mercury 4-stroke outboards from 15 to 90 horsepower, but always confirm with your engine serial number.

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