Mercury – Water Pressure Gauge | Dual Scale | White Face | 2-1/8" (52 mm) | 79-8M0052871

Overview

The Mercury Water Pressure Gauge (79-8M0052871) gives you an instant, accurate look at your engine’s cooling system pressure. With its dual-scale display showing both PSI and Bar, you can monitor performance in English or Metric units. The white face, black markings, and glass lens make it easy to read in any light, and it fits a standard 2-1/8" (52 mm) dash opening. Built for SmartCraft-compatible systems, it’s a dependable OEM addition for keeping tabs on your motor’s health.

Key Features

• Dual-Scale Readout (PSI & Bar) – Displays water pressure in both English and Metric units.
• White Face & Glass Lens – Clear, bright look that matches Mercury OEM gauges.
• Standard 2-1/8" (52 mm) Fit – Simple drop-in installation for most dashboards.
• SmartCraft Compatible – Works with engines equipped with water pressure sensors.
• Accurate Monitoring – Helps verify proper engine cooling at different speeds and loads.
• Durable Marine Design – UV-stable, corrosion-resistant, and vibration-tested.
• OEM Fit & Finish – Designed to match Mercury’s white-face gauge family for a consistent dash look.

Compatibility

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

Performance & Practical Benefits

Keeping an eye on water pressure helps you catch cooling issues early and maintain peak engine performance. This gauge gives you clear readings in both PSI and Bar, so you’ll know right away if something’s off. It’s simple to install, matches your other Mercury gauges, and provides the reliability that only OEM equipment can deliver.

Why Buy OEM

Mercury’s gauges are built for the marine world — tested for salt, vibration, and heat. Every OEM gauge offers precision fit and long-term durability, ensuring you get accurate readings and years of dependable performance. With genuine Mercury gear, you’re getting the same quality found on factory-rigged boats.

FAQ

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

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

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

Q4: Can I install it myself?
Yes — it installs easily into standard Mercury gauge wiring.

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