Sierra 18-5777 Mercury Switch BoxFor Use On Engine Models: 6 HP S/N A197112-Up; 8 HP S/N A197112-Up; 210CC Sail Power S/N A918999-Up; 9.9 HP S/N A197112-Up; 15 HP S/N B292414-Up; 20 HP S/N B238464-G760299; 25 HP S/N B238464-G760299; Interchangeable with: CDI; 114-7452K1; 114-7452K1; Mallory; 9-25102; 9-25103; Mercury Marine; 339-7452A11; 339-7452A14; 339-7452A15; 339-7452A19; 339-7452A21; 339-7452A7; 339-7452A8; 339-7452A9; Mercury Race Outboard; 339-7452A9;