Mercury – Quicksilver Water Pressure Sensor | Engine Monitoring | Marine-Grade Construction | 881879T11Mercury Quicksilver Water Pressure Sensor Engine Monitoring Marine Grade Construction 881879T11 Overview Any boater whos spent real time on the water knows the comfort that comes from glancing at your gauges and seeing everything right where it should be. That quiet steadiness the engine breathing easy, temperatures holding, pressure sitting in that sweet spot makes every trip feel a little more relaxed. This Mercury Marine part plays a bigger role in