Mercury - Quicksilver Carburetor Repair Kit For 1983-1986 MerCruiser Engines with MerCarb 2-Barrel Carburetor 804845. Overview. When your engine hesitates, idles rough, or just doesn't pull like it used to, a good carburetor rebuild can bring it back to life. The Mercury Marine 804845 Quicksilver Carburetor Repair Kit includes everything you need to clean and rebuild the MerCarb 2-barrel carburetor found on many 1983-1986 MerCruiser engines. Each part is built to Mercury's original standards, re