Mercury – Water Temperature Gauge C–H (120–240°F) | Cooling System Monitoring | Black Face | Chrome Bezel | 79-8M6020010

Overview
This 120–240°F temperature gauge gives you a steady look at how warm the engine is running without the needle bouncing every time the boat shifts. The sweep is slow and controlled, so small changes are easy to spot with a quick glance. Out on the water, it becomes part of your usual rhythm—you check it, register the number, and keep moving. It’s a simple, everyday gauge that helps you stay ahead of heat issues.

Key Features
    • 120–240°F Scale – Covers the heat range most marine engines run in.
    • Smooth Needle Movement – Holds steady through chop, trim changes, and throttle swings.
    • Standard Dash Fit – Drops cleanly into common dash openings.
    • Backlit Display – Stays readable in low or fading light.
    • Marine-Durable Build – Handles spray, vibration, and regular day-to-day running.

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

Performance & Practical Benefits
On the water, this gauge makes spotting rising temperature simple. Because the sweep stays calm, changes stand out clearly—especially when you’re running shallow, trimming high, or picking up weeds. It’s easy to read while cruising or easing through a channel. Over time, it becomes a quiet, reliable part of keeping the engine happy.

Why Buy OEM
OEM gauges read Mercury’s sender signals correctly, so the number you see is accurate rather than drifting. They hold up well to vibration, heat, and weather that usually wear out cheaper gauges. Most boaters stay with OEM because temperature is one thing you don’t want to guess on.

FAQ
1. How do I know if the gauge is failing?
If the needle sticks, jumps, or barely moves as the engine warms, it’s likely wearing out.

2. Does this gauge need calibration?
Most setups read right away, but checking the sender during install is always a good move.

3. How does it handle saltwater?
A quick rinse after your run helps it hold up through long saltwater seasons.

4. Anything important during installation?
Clean grounds and solid wiring help the needle move smoothly and stay accurate.

5. What does overheating usually look like?
The needle creeps toward the upper part of the scale and stays there under load.