Mercury - Tachometer Gauge 7K Engine Monitoring Black Face Black Bezel 79-8M6020026. OverviewThis 7,000-RPM tachometer gives you a clean, steady look at engine speed without feeling touchy or overreactive. Out on the water, the needle moves with a calm sweep that feels natural when you're rolling into the throttle or trimming the boat out. It's the kind of gauge you start trusting quickly because it behaves the same in smooth water as it does in light chop. Straightforward, steady, and easy to r