Carter BB-1 carb 2 11/16" center to center on mounting. Adjustable main jet for use on 4, 6, or 8 cyl. engines. Excellent condition. Has been COMPLETELY disassembled, cleaned, all parts inspected and/or replaced and put back together finger tight so you can install the new rebuilding kit yourself (takes 15min.--I don't want the insurance liability of doing rebuilding). Includes NEW accelerator pump and power valve springs, NEW ethanol compatible gaskets and needle/seat rebuilding kit and NEW fillister head screws throughout.