Mercury – Water Temperature Gauge C–H (120–240°F) | Cooling System Monitoring | White Face | Chrome Bezel | 79-8M6020022

Overview
This 120–240°F water-temperature gauge gives you a steady, easy read on how warm the engine’s running. The needle moves with a slow, predictable sweep, so real temperature changes pop out without bouncing around. Out on the water, it becomes a quick part of your natural scan—glance, note the number, and keep running. It’s a clean, simple gauge that helps you stay ahead of heat-related issues.

Key Features
    • 120–240°F Scale – Covers the heat range most marine engines run in.
    • Smooth Needle Sweep – Holds steady through chop, trim changes, and throttle swings.
    • Standard Dash Fit – Fits neatly in common dash cutouts.
    • Backlit Display – Easy to read in low light or cloudy conditions.
    • Marine-Durable Build – Handles spray, vibration, 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 rising temps early when you’re pushing through weeds, running shallow, or working the engine hard. The calm sweep makes it easy to catch gradual changes that might otherwise go unnoticed. It’s quick to read and doesn’t draw attention away from the run. In day-to-day use, it becomes a quiet part of keeping the engine healthy.

Why Buy OEM
OEM gauges read Mercury’s sender signal exactly as intended, which keeps the temperature accurate and consistent. They handle vibration, heat, and weather better than cheaper versions. Most boaters stick with OEM because it avoids guesswork and drifting readings.

FAQ
1. How can I tell if this temperature gauge is failing?
If the needle sticks, jumps, or doesn’t change as the engine warms up, it’s likely wearing out.

2. Does it need calibration?
Most setups read correctly right away, but checking the sender connection during install is smart.

3. How does it hold up in saltwater?
A quick rinse after each run helps it stay reliable through saltwater seasons.

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

5. What does overheating typically look like here?
The needle climbs toward the upper part of the scale and doesn’t settle back down under load.