Mercury – Oil Temperature Gauge | Dual Scale | Black Face | 2-1/8" (52 mm) | 79-8M0054360

Overview

The Mercury Oil Temperature Gauge (79-8M0054360) gives you a clear view of your engine’s oil temperature so you can make sure everything’s running in the safe zone. It features a dual-scale display showing both Fahrenheit and Celsius, making it easy to read no matter what units you prefer. With a black face, white markings, and a glass lens, it’s sharp, easy to read, and built to match other Mercury OEM gauges. It fits a standard 2-1/8" (52 mm) dash hole and connects to SmartCraft systems that include oil temperature sensors.

Key Features

• Dual-Scale Readout (°F / °C) – Displays oil temperature in both Fahrenheit and Celsius.
• Black Face & Glass Lens – High-contrast look with clear readability day or night.
• Standard 2-1/8" (52 mm) Fit – Installs easily in most dashboards or panels.
• SmartCraft Integration – Works with Mercury SmartCraft systems that have oil temp sensors.
• Accurate Monitoring – Real-time temperature readings to help maintain proper engine performance.
• Marine-Grade Construction – UV-stable, corrosion-resistant, and built to handle vibration and saltwater exposure.
• OEM Fit & Finish – Matches Mercury’s black-face gauge lineup for a consistent, factory look.

Compatibility

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

Performance & Practical Benefits

This gauge helps you protect your engine by keeping a constant eye on oil temperature. It gives fast, accurate feedback so you’ll know right away if something’s off. The dual-scale readout makes it easy to read in either unit, and the black-face design gives your dash a clean, professional finish that pairs perfectly with other SmartCraft instruments.

Why Buy OEM

Mercury gauges are built to the same high standards as their engines. Each one is tested for accuracy, vibration resistance, and corrosion protection. With OEM equipment, you get perfect fitment, reliable data, and long-lasting performance that keeps your boat running strong.

FAQ

Q1: What temperature scales does it show?
It displays oil temperature in both Fahrenheit and Celsius.

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

Q3: Does it work with all Mercury engines?
It’s compatible with SmartCraft-capable engines that include oil temperature sensors.

Q4: Is installation simple?
Yes — it installs easily with standard Mercury SmartCraft wiring.

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