Mercury – Gear Oil Pressure Gauge 600 PSI | Dual Scale | White Face | 2-1/8" (52 mm) | 79-8M0069415

Overview

The Mercury Gear Oil Pressure Gauge (79-8M0069415) lets you keep an eye on your gearcase health with precision. It displays oil pressure up to 600 PSI and features a dual-scale face showing both PSI and Bar for easy reading in either English or Metric units. With its white face, crisp black markings, and glass lens, it matches the rest of your Mercury OEM gauges perfectly. Built to fit a standard 2-1/8" (52 mm) dash hole, this gauge integrates cleanly into SmartCraft systems when used with compatible sensors.

Key Features

• Dual-Scale Gauge (0–600 PSI / 0–40 Bar) – Monitors gear oil pressure in English and Metric units.
• White Face & Glass Lens – Clean, easy-to-read OEM design.
• Standard 2-1/8" (52 mm) Dash Fit – Installs quickly in most dashboards or panels.
• SmartCraft-Compatible – Works with Mercury systems that include gear oil pressure sensors.
• Accurate Monitoring – Helps detect changes in gearcase pressure before they become issues.
• Marine-Grade Durability – UV-resistant and corrosion-proof construction built for salt and spray.
• OEM Fit & Finish – Matches Mercury’s white-face gauge series for a professional, factory appearance.

Compatibility

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

Performance & Practical Benefits

This gauge helps you protect your lower unit by showing live gear oil pressure, so you’ll know right away if something’s not right. It’s easy to read, built tough for the marine environment, and adds a polished, professional look to your dash. Whether you’re upgrading your setup or replacing a worn gauge, it’s a reliable addition to any SmartCraft system.

Why Buy OEM

Mercury gauges are built to the same standards as their engines — precise, durable, and designed to last. Each one is tested for vibration, heat, and salt exposure to ensure consistent performance. With OEM equipment, you get the correct fit, clear SmartCraft communication, and long-term dependability right from the factory.

FAQ

Q1: What pressure range does this gauge display?
It measures 0–600 PSI and 0–40 Bar on a dual-scale face.

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

Q3: Does it work with any Mercury engine?
It’s compatible with SmartCraft-capable engines that have gear oil pressure sensors installed.

Q4: Is it easy to install?
Yes — it installs like any standard Mercury gauge and connects through the SmartCraft network.

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