Mercury – Water Temperature Gauge C–H (120–240°F) | Cooling System Monitoring | Black Face | Brushed Bezel | 79-8M6020046

Overview
This 120–240°F water-temperature gauge gives you a clear sense of how warm the engine is running without bouncing around every time the boat shifts. The needle sweeps in a calm, steady arc, so even small changes stand out when something isn’t right. Out on the water, it reacts naturally—whether you’re getting on plane, trimming up, or easing through chop. It’s a simple, reliable gauge that quickly becomes part of your usual glance around the dash.

Key Features
    • 120–240°F Range – Covers the heat range most marine engines operate in.
    • Steady Needle Movement – Stays smooth through chop, turns, and throttle changes.
    • Standard Dash Fit – Sits cleanly in common panel cutouts.
    • Backlit Face – Stays readable during early mornings or low-light evenings.
    • 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 gives you a relaxed but reliable feel for engine temperature. The smooth sweep makes it easy to notice if the engine starts creeping hotter than usual, especially when running shallow or pushing through weeds. It’s quick to read and doesn’t pull attention away from driving. Over time, it simply becomes part of staying ahead of cooling issues.

Why Buy OEM
OEM gauges follow Mercury’s sensor signals accurately, which keeps the reading honest. They tend to hold up better to vibration, heat, and shifting weather than cheaper alternatives. Most boaters stick with OEM because it saves trouble down the road.

FAQ
1. How can I tell if the temperature gauge is failing?
If the needle stays in one spot, jumps around, or stops responding, it’s probably wearing out.

2. Does this gauge need calibration?
Most setups read correctly right away, but checking your sender connection during install is always smart.

3. How does it handle saltwater?
A quick rinse after each trip helps it last through long saltwater seasons.

4. Anything important during installation?
Make sure the wiring and ground are clean so the needle can move smoothly.

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