Mercury – Voltmeter 8–18V | Electrical System Monitoring | White Face | Brushed Bezel | 79-8M6020069

Overview
This 8–18V voltmeter gives you a clear look at how the boat’s electrical system is holding up without the needle bouncing every time you hit a bit of chop. The sweep is slow and steady, so you can spot an odd dip or spike with a quick glance. Out on the water, it becomes a simple habit—take a look, make sure things look normal, and keep running. It’s a low-key, reliable gauge that helps you stay ahead of electrical trouble.

Key Features
    • 8–18V Scale – Shows charging and battery voltage in the full working range.
    • Calm Needle Sweep – Stays steady through bumps, turns, and throttle changes.
    • Standard Dash Fit – Sits cleanly in common dash openings.
    • Backlit Display – Easy to read when light starts to fade.
    • Marine-Ready Build – Handles heat, spray, and vibration.

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

Performance & Practical Benefits
When you’re out for the day, this gauge makes it simple to catch small electrical problems before they grow. A steady needle makes changes easy to notice, whether you’re cruising, idling, or running lights and accessories. It’s quick to check and doesn’t pull your attention away from the water. Over time, it becomes one of those quiet checks that keeps things dependable.

Why Buy OEM
OEM gauges follow Mercury’s electrical signals accurately, so the reading stays consistent. They handle weather, heat, and vibration better than cheaper gauges. Most boaters stick with OEM because it keeps the information straight and avoids guesswork.

FAQ
1. How do I know if the voltmeter is starting to fail?
If the needle freezes, jumps around, or barely moves, the gauge is likely wearing out.

2. Does this gauge need calibration?
Most of the time it reads correctly right away, but checking wiring and grounds during install is always smart.

3. How does it hold up in saltwater?
A quick rinse after the run helps it last through salty conditions.

4. Anything important during installation?
Make sure the power and ground wires are clean and tight so the needle stays steady.

5. What does low voltage usually look like?
The needle drops toward the low side and stays there, especially under load.