Mercury – Gear Oil Pressure Gauge 600 PSI | Dual Scale | Black Face | 2-1/8" (52 mm) | 79-8M0069429

Overview

The Mercury Gear Oil Pressure Gauge (79-8M0069429) gives you a fast, accurate view of your gearcase pressure so you can spot problems early and protect your drivetrain. It reads up to 600 PSI, with a dual-scale display showing both PSI and Bar, so you can monitor performance in your preferred units. The black face, bold white numerals, and glass lens make it easy to read in any light, and it fits a standard 2-1/8" (52 mm) dash hole. Built for SmartCraft-capable systems, this OEM gauge is rugged, reliable, and ready for real-world use.

Key Features

• Dual-Scale Readout (0–600 PSI / 0–40 Bar) – Displays gear oil pressure in English and Metric units.
• Black Face & Glass Lens – Sharp, high-contrast styling that matches Mercury’s OEM look.
• Standard 2-1/8" (52 mm) Fit – Easy to install in most dashboards or rigging panels.
• SmartCraft Integration – Works with Mercury systems using gear oil pressure sensors.
• Accurate & Real-Time Monitoring – Helps you detect pressure drops or anomalies before they cause damage.
• Marine-Grade Durability – UV-stable, vibration-tested, and built to resist corrosion.
• OEM Fit & Finish – Matches other Mercury black-face gauges for a consistent, factory helm setup.

Compatibility

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

Performance & Practical Benefits

Monitoring gear oil pressure is critical for protecting your lower unit, and this gauge gives you the data you need at a glance. The dual-scale face is clear and easy to read in any light, while the black finish blends seamlessly with the rest of your Mercury gauge cluster. It’s a tough, accurate, and essential instrument for serious boaters running SmartCraft systems.

Why Buy OEM

Mercury gauges are built to endure the same punishing conditions their engines face — vibration, heat, salt, and spray. Every component is tested for accuracy and long-term reliability. Choosing genuine OEM gear ensures perfect fit, clear SmartCraft communication, and the kind of precision Mercury owners expect.

FAQ

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

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

Q3: Does it work with all Mercury engines?
It’s designed for SmartCraft-capable engines with gear oil pressure sensors.

Q4: Can it be installed easily?
Yes — it installs like any other Mercury auxiliary gauge using standard SmartCraft wiring.

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