Quicksilver 881879T11 Pressure SensorGenuine OEM Mercury-Mercruiser part. The Mercury 881879T11 Water Pressure Sensor is a replacement part designed for select 75300hp Mercury and Mariner FourStroke and 2-stroke outboards, including DFI, Jet, Pro XS, and Sport XS models. It also fits MerCruiser sterndrive and inboard V6 and V8 MPI engines (305, 350, 377, 496, and 502 CID). Designed for 0100 PSI applications, this sensor is easy to install using standard shop tools. Refer to your owner's manual or service guide for compatibility and installation.