Sierra 18-99419 Mercury 3 Cyl Trigger Replaces CDI 134-7029-3This Sierra trigger is for use with Mercury outboard electrical systems.Sierra 18-99419 Trigger Application Information Fits: 90/95HP SportJet Mercury outboards built between 1993-1997; Fits: 70/90HP Force Outboards built between 1991-1995; What is the 18-99419 3 Cyl Trigger Interchangeable with? CDI; 134-7029-3; Mercury; 817029A3; 817029A9; Click here for Sierra 18-99419 Trigger Installation Instructions