Mercury – Water Pressure Gauge 0–30 PSI | Cooling System Monitoring | White Face | Black Bezel | 79-8M6020055

Overview
This 0–30 PSI water-pressure gauge gives you a steady, easy read on how well the engine is pulling water through the cooling system. The needle moves with a smooth, relaxed sweep, so real changes stand out instead of getting lost in jitter. Out on the water, it reacts the way you expect when you trim up, run shallow, or ease into heavier chop. It’s a simple, dependable gauge that becomes part of your normal checks without getting in the way.

Key Features
    • 0–30 PSI Range – Covers the pressure window most outboards run in.
    • Smooth Needle Action – Holds steady through bumps, turns, and throttle changes.
    • Standard Dash Fit – Installs cleanly in common panel cutouts.
    • Backlit Face – Stays readable during early mornings or low-light runs.
    • Marine-Ready Build – Handles vibration, spray, and long days on the water.

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

Performance & Practical Benefits
On the water, this gauge helps you pick up on cooling issues before they turn into something more serious. The steady sweep makes drops in pressure easy to spot when you’re running skinny water, trimming high, or pulling weeds through the intakes. It reads cleanly at idle and mid-cruise, so you’re never guessing about what the cooling system is doing. It’s one of those small checks that adds confidence to a long day outside.

Why Buy OEM
OEM gauges follow Mercury’s pressure-signal behavior closely, keeping readings consistent instead of drifting over time. They hold up well through seasons of vibration, heat, and spray. Most boaters stick with OEM because it keeps the information honest and the system predictable.

FAQ
1. How do I know if the water-pressure gauge is starting to fail?
If the needle hangs up, jumps for no reason, or barely moves, the gauge is likely wearing out.

2. Does this gauge need calibration?
Not usually—it normally reads correctly right away, as long as the pressure line is routed cleanly.

3. How does it handle saltwater?
A quick rinse after a trip goes a long way, and it holds up well through full saltwater seasons.

4. Anything important during installation?
Make sure the pressure line isn’t kinked or pinched so the gauge can respond smoothly.

5. What does low pressure typically look like underway?
The needle drops toward the lower end and stays there, often before alarms sound.