Mercury – Water Pressure Gauge 0–30 PSI | Cooling System Monitoring | Black Face | Brushed Bezel | 79-8M6020043

Overview
This 0–30 PSI water pressure gauge gives you a straightforward feel for how well the engine’s pulling water through the cooling system. The needle moves in a smooth, relaxed way, so you can spot changes without guessing. Out on the water, it reacts the way you expect—whether you’re getting on plane, trimming up, or running a skinny stretch. It’s a simple, dependable gauge that helps you keep an eye on things before they get out of hand.

Key Features
    • 0–30 PSI Range – Covers the everyday pressure range most outboards run in.
    • Steady Needle Movement – Holds a calm reading through chop, acceleration, and turns.
    • Standard Dash Fit – Installs cleanly in common panel openings.
    • Backlit Face – Easy to read during early starts or low-light rides.
    • Marine-Durable 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 spot cooling issues early. A steady sweep makes it easy to notice drops in pressure when you’re running shallow or kicking up debris. It’s quick to read while cruising, trimming, or settling into a long run. After a few trips, checking it becomes second nature—just part of keeping the boat happy.

Why Buy OEM
OEM gauges follow Mercury’s signal patterns closely, so the reading stays honest. They hold up better to heat, vibration, and weather than cheaper alternatives. It’s one of those choices that saves trouble later on.

FAQ
1. How do I know if the gauge is failing?
If the needle hangs up, barely moves, or bounces for no reason, it’s likely wearing out.

2. Does this gauge need calibration?
Most of the time it reads correctly right away, but a clean, unobstructed pressure line helps a lot.

3. How does it hold up in saltwater?
With a quick rinse after each run, it handles saltwater seasons without issue.

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

5. What does low pressure look like underway?
The needle will slide toward the bottom of the scale and stay there, usually before alarms trigger.