Trigger Mercury Mariner 3 Cylinder | CDI 134-4512-3 CDI Electronics Mercury Mariner 3 Cylinder Trigger | 134-4512-3 Replacement trigger for 30 HP, 40 HP, 50 HP, 55 HP, 65 HP, 75 HP, & 90 HP Mercury outboard engines from 1996-2007. CDI Electronics outboard trigger Fits Mercury and Mariner 30 HP Jet model 3 cylinder engines from 1998 to 2001 Fits Mercury and Mariner 40 HP 3 cylinder engines from 1997 to 2005 with serial number range 0G590000-0T999999 Fits Mercury and Mariner 40 HP Jet model 3 cylinder engines from 1998 to 2001 with serial number range 0G590000-0T408999 Fits Mercury and Mariner 40 HP Jet model 3 cylinder engines from 2002 to 2005 with serial number range 0T178500-0T979999 Fits Mercury and Mariner 50 HP 3 cylinder engines from 1997-2006 with serial number range 0G531301-0T999999 Fits Mercury and Mariner 50 HP Jet model 3 cylinder engines from 1998 to 2005 with serial number range 0G590000-0T408999 Fits Mercury and Mariner 60 HP 3 cylinder engines from 1998 to 2007 with serial number range 0G590000-0T980000 Fits Mercury and Mariner 65 HP Jet model 3 cylinder engines from 1996 to 2006 with serial number range 0G760300-1B000001 Fits Mercury and Mariner 75 HP 3 cylinder engines from 1996 to 2006 with serial number range 0G438000-1B000001 Fits Mercury and Mariner 90 HP 3 cylinder engines from 1996 to 2006 with serial number range 0G438000-1B000299 CDI determines the most common causes of component failure and designs their replacements to be better than the original Replaces Mercury 854512T, 834520T, 855746A1, and 855746A12