Mercury - Quicksilver 823427A1 Rochester 2-Barrel Carburetor Repair Kit MerCruiser GM 4- & 6-Cylinder Engines (1964-1983) 823427A1. Overview. If your old MerCruiser isn't running like it used to - maybe it stumbles, idles rough, or burns extra fuel - your carburetor might be due for a rebuild. The Quicksilver 823427A1 Rochester 2-Barrel Carburetor Repair Kit gives you everything you need to restore clean, efficient fuel delivery on 1964-1983 MerCruiser 4- and 6-cylinder engines made by GM.. This