Mercury - Tachometer Gauge 6K Engine Speed Monitoring White Face Black Bezel 79-8M6020049. OverviewThis 6,000-RPM tachometer gives you a clear feel for how the engine's running without the needle jumping every time the boat shifts. It settles into a smooth sweep, so you can check your RPMs with a quick glance and keep your focus on the water. Out on a long run, it feels natural-no guessing, no jitter, just a steady read that matches what the engine is doing. It's a simple, everyday gauge that be