Thermostat for Mercury Mariner 40 45 50 55 60 HP Outboard 8M0117413 18-3640

Thermostat for Mercury Mariner

This thermostat for Mercury Mariner outboard motors is a direct replacement for OEM part numbers 8M0117413 and 18-3640, helping maintain proper engine temperature.

Overview

This thermostat for Mercury Mariner 40 45 50 55 60 HP outboards controls coolant flow to keep the engine within optimal temperature range. Designed for Mercury Mariner engines, this thermostat helps prevent overheating and ensures efficient combustion. A reliable thermostat for Mercury Mariner outboards is essential for consistent performance.

Built For Performance

• Replaces OEM part numbers 8M0117413 and 18-3640
• Constructed from corrosion-resistant materials for marine use
• Provides precise temperature regulation for outboard engines
• Easy to install with standard tools

Fits These Machines

• for Mercury Mariner 40 HP
• for Mercury Mariner 45 HP
• for Mercury Mariner 50 HP
• for Mercury Mariner 55 HP
• for Mercury Mariner 60 HP

On-The-Job Use

• Used in marine engine cooling systems to regulate operating temperature
• Commonly installed during routine outboard maintenance
• Helps maintain fuel efficiency and reduce emissions
• Works in both freshwater and saltwater environments

Specs At A Glance

Good To Know

Q: What is the purpose of a thermostat in a Mercury Mariner outboard? A: It regulates engine temperature by controlling coolant flow, ensuring the engine warms up quickly and stays within safe operating limits.

Q: How do I know if my thermostat needs replacement? A: Signs include overheating, poor fuel economy, or slow warm-up. Replacing the thermostat at recommended intervals can prevent costly engine damage.

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