Mercury - Weber 4-Barrel Carburetor Repair Kit Carburetion System Premium Composite & Metal Components 8M0120192. Overview. If you've ever had an older MerCruiser stumble or hesitate coming out of the hole, you know the feeling-it tugs at your gut a little. Boats from the late eighties and nineties have real soul, but they only run their best when the carburetor is clean, tight, and tuned the way it was meant to be. That's why so many boaters trust the Quicksilver 8M0120192 Weber 4-Barrel Carbur