Mercury – Water Temperature Gauge C–H (120–240°F) | Cooling System Monitoring | White Face | Brushed Bezel | 79-8M6020070

Overview
This 120–240°F water-temperature gauge gives you a steady read on how warm the engine’s running without jumping every time the boat moves. The needle has a slow, predictable sweep, so even small changes are easy to catch with a quick look. Out on the water, it reacts the way you expect—whether you’re trimming up, running through chop, or easing around a marina. It’s a simple gauge that helps you stay ahead of heat issues.

Key Features
    • 120–240°F Scale – Covers the heat range most marine engines operate in.
    • Smooth Needle Sweep – Holds steady through chop, turns, and throttle changes.
    • Standard Dash Fit – Fits cleanly in common dash openings.
    • Backlit Display – Easy to read when light is low.
    • Marine-Durable Build – Handles spray, vibration, and changing conditions.

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

Performance & Practical Benefits
On the water, this gauge helps you notice rising temps early, especially when running shallow or kicking up weeds. The sweep is calm enough that real changes stand out, but not so sensitive that it jumps around. It’s easy to glance at while cruising or trimming the boat out. Over time, it becomes a quiet part of keeping the engine healthy.

Why Buy OEM
OEM gauges follow Mercury’s sender signals the way they’re meant to, which keeps the reading steady instead of drifting. They hold up well to vibration, salt, heat, and weather—conditions that usually expose weaker gauges. Most boaters stick with OEM because it keeps their information trustworthy season after season.

FAQ
1. How do I know the temperature gauge is going bad?
If the needle sticks, barely moves, or doesn’t change as the engine warms, it’s likely failing.

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

3. How does it handle saltwater use?
A quick rinse after each run helps it hold up well through saltwater seasons.

4. Anything important during installation?
Clean connections and a solid ground help the needle move smoothly and read accurately.

5. What does overheating usually look like on the gauge?
The needle will creep toward the upper end and stay there under load.