Mercury – Speedometer 45 MPH | Boat Speed Monitoring | Black Face | Brushed Bezel | 79-8M6020039

Overview
This 45-MPH speedometer gives you a simple, steady read on how fast the boat’s moving without wobbling every time the hull shifts. The needle settles in with a smooth swing, so you can check your speed with a quick glance and get right back to watching the water. Out on a long run, it feels familiar and easy—no tricks, no guessing. It’s just a straightforward gauge that does its job without making a fuss.

Key Features
    • 45-MPH Range – Lays out boat speed on a clean, easy-to-follow scale.
    • Smooth Needle Movement – Holds steady through chop, turns, and throttle changes.
    • Standard Dash Fit – Drops into common panel openings without extra steps.
    • Backlit Display – Stays clear during early starts and late rides.
    • Marine-Durable Build – Stands up to spray, vibration, and everyday use.

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

Performance & Practical Benefits
On the water, the gauge feels steady enough that you don’t need to stare at it to make sense of your speed. The needle doesn’t flutter when the bow lifts or the wind picks up, so you always get a clean, honest read. It makes it easier to settle into a pace that feels right for the conditions, whether you’re cruising a shoreline or running across open water. Over time, it becomes one of those small things that makes the boat feel more predictable.

Why Buy OEM
OEM gauges keep the signal clean and accurate because they’re built around Mercury’s own systems. They tend to last longer and stay reliable after seasons of vibration, weather, and long days on the water. Most boaters stick with OEM simply because it removes the guesswork.

FAQ
1. How can I tell if the speedometer’s starting to go bad?
If the needle sticks, hesitates, or suddenly drops out, the gauge is likely wearing down.

2. Does this gauge need calibration?
Most rigs read correctly as soon as they’re wired up, but checking settings during install is always a smart move.

3. How does it handle saltwater?
A quick rinse after your ride keeps it working well through full saltwater seasons.

4. Anything worth double-checking during installation?
Clean, tight signal and power connections make a noticeable difference in how smooth the needle feels.

5. What does a failing gauge usually do on the water?
You’ll see drifting readings, slow response, or random drops to zero.