Sierra carburetor kit for Mercury Marine engine. Fits GM 420 V8 454 (1987-89), GM 425 V8 454 (1990-93), GM 425 (Gen V) V8 454 (1992-93), 440 TRS GM 454 (1983-86), GM 450 V8 454(1995-96), 460 TRS V8 482 (1983-86), GM 465 V8 502 (1990-92), GM 465 (Gen V) V8 502 (1992-94), 500 (Gen+) GM 502 V8 (1999), 500 (Gen V) 502 V8 (1994-98), 500 Bulldog 540 V8 (1990-01) applications. Sierra Part #18-7751.OEM Part Number: 13220 For Mercury Marine engine | Carburetor Kit For Mercury Marine Engine, Part #18-7751