Mercury – Coolant Temperature Gauge | Dual Scale | Gray Face | 2-1/8" (52 mm) | 79-8M0065962

Overview

The Mercury Coolant Temperature Gauge (79-8M0065962) gives you a clear picture of your engine’s cooling performance at a glance. The dual-scale display reads in both Fahrenheit and Celsius, so it’s easy to monitor in your preferred units. The gray face, clean white numerals, and glass lens provide a sharp, professional appearance that ties in perfectly with Mercury’s OEM gray-face gauge family. It fits a standard 2-1/8" (52 mm) dash hole and works with SmartCraft-capable systems when compatible sensors are installed.

Key Features

• Dual-Scale Display (°F / °C) – Shows coolant temperature in both English and Metric units.
• Gray Face & Glass Lens – Modern factory look with clear, easy-to-read markings.
• Standard 2-1/8" (52 mm) Fit – Simple installation for most dashboards or helm panels.
• SmartCraft-Ready – Works with Mercury SmartCraft systems equipped with temperature sensors.
• Accurate Monitoring – Helps you ensure your engine runs at the proper operating temperature.
• Marine-Grade Durability – UV-stable, corrosion-resistant, and tested for vibration and salt exposure.
• OEM Fit & Finish – Matches Mercury gray-face gauges for a clean, uniform dash setup.

Compatibility

• Fits: Mercury SmartCraft-equipped boats (functionality depends on engine model and available sensors)

Performance & Practical Benefits

This gauge helps you keep tabs on your engine’s cooling system to avoid overheating and maintain peak efficiency. The dual-scale face makes it easy to read in both °F and °C, and the gray design gives your dash a clean, contemporary look. It’s quick to install, simple to use, and built for years of reliable service in marine conditions.

Why Buy OEM

Mercury Marine gauges are designed and tested to meet the same standards as their engines. Each unit is built to handle salt, heat, and vibration while providing precise SmartCraft communication. With OEM gear, you get exact fit, accurate data, and long-term reliability that lasts season after season.

FAQ

Q1: What temperature range does it read?
It displays coolant temperature in both Fahrenheit and Celsius.

Q2: What dash hole size does it fit?
A standard 2-1/8" (52 mm) gauge opening.

Q3: Will it work with any Mercury engine?
It’s compatible with SmartCraft-equipped engines that include coolant temperature sensors.

Q4: Is it easy to install?
Yes — it installs like any other small-diameter Mercury gauge using standard SmartCraft wiring.

Q5: Is this an OEM gauge?
Yes — it’s a genuine Mercury Marine part, built to OEM specifications.