Mercury – Water Pressure Gauge 0–30 PSI | Cooling System Monitoring | Black Face | Black Bezel | 79-8M6020031

Overview
This 0–30 PSI water pressure gauge gives you a clear look at how well the cooling system is moving water through the engine. Out on the water, the needle settles into a smooth, steady sweep, so you can spot changes without squinting or guessing. It reacts naturally when you trim up, get on plane, or run through chop. It’s one of those gauges that quickly becomes part of your routine glance around the dash.

Key Features
    • 0–30 PSI Range – Shows cooling system pressure across the full operating window.
    • Steady Needle Action – Holds a smooth reading even when the boat’s moving around.
    • Standard Dash Fit – Drops into common panel openings without extra work.
    • Backlit Face – Easy to see during early launches and evening runs.
    • Marine-Durable Build – Handles vibration, spray, and day-to-day conditions.

Engine & Boat Compatibility
    • FourStroke outboards
    • Verado series
    • Pro XS engines
    • SmartCraft systems

Performance & Practical Benefits
On the water, the gauge gives you a clean sense of how the cooling system is behaving, especially when running in skinny water or heavy chop. The needle doesn’t flutter, so any change feels noticeable instead of muddy. It helps you spot issues early and run the boat with more confidence. Over time, it becomes one of those quiet tools that keeps you ahead of trouble.

Why Buy OEM
OEM gauges talk cleanly with Mercury systems, which helps the readings stay trustworthy. They hold calibration well and stand up to vibration and weather better than budget replacements. It’s the kind of reliability most boaters lean on without thinking about it.

FAQ
1. How do I know if this gauge is starting to fail?
If the needle sticks, drifts, or always reads low or high, it’s usually wearing out.

2. Does this gauge need calibration?
Most rigs read correctly once installed, but checking the pressure line routing is always smart.

3. How does it handle saltwater use?
With a quick rinse after trips, it holds up well throughout saltwater seasons.

4. Anything important during installation?
A clean, unobstructed pressure line helps the gauge respond smoothly and accurately.

5. What happens when water pressure drops while underway?
You’ll see the needle fall off quickly, which is often a sign of blockage, debris, or intake issues.