Mercury - Carburetor Repair Kit FourStroke Series Marine-Grade Components 8M0044576. Overview. Every boater has had that moment-the engine hesitates just a little as you throttle up, and you immediately know something's not quite right in the fuel system. On small outboards especially, a healthy carburetor makes all the difference between a smooth day on the water and fighting the motor at every turn. The Mercury Marine part number 8M0044576 Carburetor Repair Kit brings that confidence back. It'