Sierra 18-5775 Switch BoxThe Sierra 18-5775 Switch Box is a replacement part for Mercury and Chrysler/Force engines. All Sierra aftermarket parts are manufactured to meet or exceed OEM requirements. Features: Fits: 3 & 6 cylinder outboards with ADI ignition systems; Enhanced Spark Efficiency: Delivers high-voltage performance for quick and reliable engine start; Stores and rapidly discharges high-voltage to the ignition coil for a strong, reliable spark; Provides efficient and precise timing for optimal engine performance; Marine-Grade Durability: Built to withstand harsh marine environments, including exposure to moisture and corrosion. ; OEM matched wire colors for easy identification during installation; Interchangeable With: CDI; 114-7778; Chrysler/Force/US Marine; 332-7778A12; Mallory; 9-25100; Mercury Marine; 332-5524A1; 332-7778A1; 332-7778A12; 332-7778A3; 332-7778A6; 332-7778A7; 332-7778A9; F749301; F7778A9; Mercury Race Outboard; 332-7778A12; 332-7778A3; Mercury Sport Jet; 332-7778A12;