Mercury – Water Pressure Gauge | Dual Scale | Black Face | 2-1/8" (52 mm) | 79-8M0052850

Overview

The Mercury Water Pressure Gauge (79-8M0052850) gives you a quick, accurate look at your engine’s cooling system performance. It features a dual-scale face displaying pressure in both PSI and Bar, so you can read it easily in English or Metric units. With its black face, white markings, and glass lens, it fits right in with Mercury’s OEM black-face gauge family. It installs into a standard 2-1/8" (52 mm) dash hole and connects to SmartCraft-capable systems with compatible pressure sensors.

Key Features

• Dual-Scale Readout (PSI & Bar) – Displays cooling water pressure in English and Metric units.
• Black Face & Glass Lens – Clean, high-contrast design for excellent visibility.
• Standard 2-1/8" (52 mm) Fit – Easy installation in most dashboards or panels.
• SmartCraft Integration – Works with Mercury systems that include water pressure sensors.
• Accurate Monitoring – Helps confirm proper cooling system pressure and flow.
• Durable Marine Construction – UV-stable, corrosion-resistant, and built for vibration and salt exposure.
• OEM Fit & Finish – Matches Mercury’s black-face gauge line for a uniform helm appearance.

Compatibility

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

Performance & Practical Benefits

This gauge is an essential tool for monitoring your engine’s cooling system. By keeping an eye on water pressure, you’ll know your motor is getting the flow it needs for safe, efficient operation. The black face and white markings give your dash a professional, factory look that performs as good as it looks.

Why Buy OEM

Mercury gauges are built for accuracy and made to last. Each one is tested to endure years of vibration, heat, and saltwater exposure. With genuine OEM equipment, you get the right fit, true SmartCraft compatibility, and factory-level reliability on every run.

FAQ

Q1: What pressure units does this gauge display?
It reads water pressure in PSI and Bar (dual-scale).

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

Q3: Does it work with any Mercury engine?
It’s made for SmartCraft-capable engines that have water pressure sensors installed.

Q4: Can I install it myself?
Yes — it installs easily using standard SmartCraft wiring.

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