Genuine Mercruiser 861126A1 Fuel Pressure Regulator 43PSI Fuel pressure regulator for use on Mercruiser 4.3L, 5.0L, 5.7L and 6.2L MPI sterndrive and inboard engines with ECM 555. Also for use on Mercruiser 7.4L MPI (L29), 454 Magnum MPI, 496 Magnum and...