Mercury – Oil Temperature Gauge | Dual Scale | White Face | 2-1/8" (52 mm) | 79-8M0054374

Overview

The Mercury Oil Temperature Gauge (79-8M0054374) helps you keep tabs on your engine’s oil temperature so you can spot potential issues before they become costly repairs. Featuring a dual-scale readout that shows both Fahrenheit and Celsius, this gauge is easy to read and fits a standard 2-1/8" (52 mm) dash hole. The white face, crisp black markings, and glass lens match the rest of Mercury’s OEM gauge lineup for a clean, professional look on your dash.

Key Features

• Dual-Scale Readout – Displays oil temperature in both °F and °C for easy reference.
• White Face & Glass Lens – Clear, bright design that matches Mercury’s factory styling.
• Standard 2-1/8" (52 mm) Dash Fit – Installs easily into existing or new dash layouts.
• SmartCraft Compatible – Works with Mercury systems that include oil temperature sensors.
• Accurate Monitoring – Provides real-time oil temperature readings for better engine protection.
• Marine-Grade Build – UV-resistant, vibration-tested, and corrosion-protected for years of use.
• OEM Fit & Finish – Genuine Mercury gauge that integrates perfectly with the rest of your dash.

Compatibility

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

Performance & Practical Benefits

Keeping an eye on oil temperature is one of the best ways to protect your engine. This gauge gives you fast, accurate readings so you’ll always know if your system is running within the right range. The dual-scale design makes it simple to read, and the white face ties in perfectly with other Mercury OEM gauges for a uniform, factory-quality appearance.

Why Buy OEM

Mercury’s gauges are designed and tested to meet the same standards as their engines. Each unit is built to handle salt, vibration, and heat without losing accuracy. With genuine OEM equipment, you get the right fit, the right data, and long-term reliability from a name trusted by boaters everywhere.

FAQ

Q1: What temperature scales does this gauge use?
It displays oil temperature in both Fahrenheit and Celsius.

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

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

Q4: Is installation easy?
Yes — it installs like any other small-diameter Mercury gauge with SmartCraft wiring.

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