Rochester 2 Barrel Marine Carburetor Kit | Sierra 18-7076 Repair kit for Rochester 2 BBL carburetor used on Mercruiser model 470 and 485 marine engines from 1976 to 1982. For Rochester 2 barrel 2GC model carburetors Fits 1705132 Rochester carburetors Replaces Mercury 1397-6367, 1397-6367A1 Replaces Mallory 9-37606