Mercury – Coolant Temperature Gauge | Dual Scale | White Face | 2-1/8" (52 mm) | 79-8M0052863

Overview

The Mercury Coolant Temperature Gauge (79-8M0052863) gives you an easy, accurate way to monitor engine temperature at a glance. It features a dual-scale display that reads in both Fahrenheit and Celsius, making it easy to reference no matter how you prefer your measurements. The white face, black numerals, and glass lens give it a clean, classic look that matches other Mercury gauges perfectly. Designed to fit a standard 2-1/8" (52 mm) dash hole, it’s a reliable, plug-in upgrade for SmartCraft-capable systems.

Key Features

• Dual Scale Readout – Displays coolant temperature in both °F and °C.
• White Face & Glass Lens – Bright, easy-to-read design that matches other Mercury gauges.
• Standard 2-1/8" (52 mm) Fit – Simple install for most dashboards and panels.
• Accurate Readings – Provides real-time engine coolant temperature monitoring.
• Engine-Specific Application – Functionality depends on your engine model and installed sensors.
• OEM Fit & Finish – Genuine Mercury part designed to integrate with factory gauge clusters.
• Built for Marine Use – Sealed housing and corrosion-resistant materials ensure long life on the water.

Compatibility

• Fits: Mercury SmartCraft-equipped boats (functionality varies by engine and available sensors)

Performance & Practical Benefits

This coolant temperature gauge adds peace of mind every time you run your boat. It gives you a clear, real-time reading of your engine’s operating temperature so you can catch issues before they become problems. The dual-scale design makes it easy to read in both English and Metric units, and the white face matches seamlessly with your existing Mercury gauge setup.

Why Buy OEM

Mercury gauges are built to the same standards as their engines — accurate, durable, and tested for real-world marine use. Each one is designed for perfect fitment and reliable readings, giving you the confidence that only OEM gear can provide.

FAQ

Q1: What’s the display range?
It shows engine coolant temperature in both Fahrenheit and Celsius.

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

Q3: Will this work on any Mercury engine?
It works with SmartCraft-capable engines, but available readings depend on installed sensors.

Q4: Is it easy to install?
Yes — it installs just like other standard Mercury gauges.

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