Sierra International 18-7642 Camshaft Position Sensor 18-7642. Designed for use with Mercruiser MCM 350 MAG MPI MX 6.2L MPI and 377 MAG (s/n 0W310000 & Up) engines. Designed for use with Mercury MIE 350 MAG MPI 5.7 MPI MX 6.2L MPI and 377 MPI (s/n...