Mercury – Voltmeter 8–18V | Electrical System Monitoring | Black Face | Black Bezel | 79-8M6020033

Overview
This 8–18V voltmeter gives you a steady, no-nonsense read on the boat’s electrical system. The needle settles quickly, even when the water’s lumpy, so you get a true sense of what the battery and charging system are doing. It’s one of those gauges you end up checking without thinking—just a quick glance to make sure everything feels normal. Simple, reliable, and easy to live with on long days.

Key Features
    • 8–18V Reading Range – Shows real-time battery and charging voltage.
    • Calm Needle Movement – Stays steady when the boat rocks or takes a hit of chop.
    • Standard Dash Fit – Drops into common instrument panel openings.
    • Backlit Face – Clear and visible during early runs or cloudy afternoons.
    • Marine-Tough Build – Handles vibration, spray, and regular use.

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

Performance & Practical Benefits
Out on the water, the gauge gives you an honest look at electrical health without flicker or jitter. It helps you catch weak batteries, loose grounds, or charging dips before they cause trouble. The reading feels natural to read at a glance, so you’re not stuck staring at the panel. Over time, it becomes one of those quiet tools that gives peace of mind.

Why Buy OEM
OEM gauges match Mercury’s electrical system layout, so the numbers stay dependable. They hold up well under vibration and weather changes that tend to wear down cheaper options. It’s the kind of reliability boaters appreciate when they’re out often.

FAQ
1. What are early signs the voltmeter is failing?
A needle that sticks, freezes, or barely moves is usually a warning.

2. Does this gauge need calibration?
Most rigs read right away, but checking wiring and grounds during install is smart.

3. How does it do in saltwater?
With a quick rinse after trips, it holds up well through full seasons.

4. Anything worth double-checking during installation?
A solid ground and clean power feed help the needle stay stable.

5. What does low voltage usually look like on the gauge?
The needle dips toward the lower end and tends to stay there under load.