Carburetor Rebuild Overhaul Kit For Zama RB-78. Complete Kit Includes gaskets, diaphragm, welch plug, needle, and inlet lever. Quality Aftermarket Carburetor Rebuild Kit Made to meet or exceed OEM specifications. Rebuild kit for Zama part number RB-78, Weed Eater 530069969 or 530071442 Complete kit, includes welch plug, screen, needle & inlet lever. OK for use with fuel containing up to 25% Ethanol