Carburetor Rebuild Overhaul Kit For Zama RB-42. Complete Kit That is OK for 10%+ Ethanol In Fuel, 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-42 Complete kit, includes welch plug, screen, needle & inlet lever. OK for use with fuel containing up to 25% Ethanol