Sierra 18-5881 Switch Box for Mercury, Chrysler, ForceThe Sierra 18-5881 Switch Box is for 4 cylinder in-line outboards with ADI ignition systems. All Sierra aftermarket parts are manufactured to meet or exceed OEM requirements.\Features: Enhanced Spark Efficiency: Delivers high-voltage performance for quick and reliable engine starts; Stores and rapidly discharges high-voltage to the ignition coil for a strong, reliable spark; Provides efficient and precise ignition timing for optimal engine performance; Marine-Grade Durability: Built to withstand harsh marine environments, including exposure to moisture and corrosion; Direct OEM Compatibility: Replacement for a variety of Mercury engine models, ensuring a precise fit and seamless installation; OEM matched wire colors for easy identification during installation; Reliable Construction: High-quality materials and advanced engineering ensure long-lasting, dependable performance; For Use On Engine Models Mercury Outboards: 40 (4 cyl.) C159200 - G589999; 45 1476510 - 1531958; 75 (4 cyl.) 6432901 & UP; 80 (4 cyl.) 4831999 - 5141096; 80 (4 cyl.) 5141097 - 6432900; 80 Jet D283222 - 6437999; 85 (4 cyl.) 4366802 - 4831998; 100 (4 cyl.) B209468 - 6437999; 125 (4 cyl.) D283222 - G437999; Force Outboards: 1991D-95 120 E000001 - E138599; 1991-92 120 L-Drive; Interchangeable With: CDI; 114-577; Chrysler/Force/US Marine; 332-5772A5; Mallory; 9-25104; Mercury Marine; 332-5772A1; 332-5772A2; 332-5772A3; 332-5772A5; 332-5772A7; F720301;