Switch Box Mercury Mariner | CDI 114-9052 CDI Electronics Mercury Mariner Switch Box | 114-9052 High performance replacement ignition pack for various 45 HP to 60 HP Mercury 3 cylinder outboard engines. CDI Electronics outboard ignition pack Fits Mercury 45 HP model Jet 3 cylinder engines from 1991 to 1999 with serial number range D000750-0G589999 Fits Mercury 50 HP 3 cylinder engines from 1991 to 1997 with serial number range 0D000750-0G589999 Fits Mercury 55 HP 3 cylinder engines from 1992 to 1997 with serial number range 0D000750-0G589999 Fits Mercury 60 HP 3 cylinder engines from 1991 to 1997 with serial number range 0D000750-0G589999 CDI determines the most common causes of component failure and designs their replacements to be better than the original Replaces Mercury 19052A 1, 19052 A 2, 19052 A 3, 19052 A 5, 19052 A 6, and 19052 A 8 Replaces Sierra 18-5791