Mercury - Carburetor Repair Kit MerCarb Series Precision Components 9650. Overview. Anyone who's spent time running an older Mercury outboard knows how much character those engines have-and how much smoother they run when the carburetor is clean, tight, and tuned the way it should be. When the idle gets a little rough or the engine hesitates coming out of the hole, it's usually the carb asking for attention. The Quicksilver Carburetor Repair Kit 9650 brings back that steady, confident throttle r