The BS-2i series two-cycle rammers are compliant with EPA and European Community emission regulations through 2015. Powered by the company’s WM 80 engine, the rammers’ auto-release choke—in which the choke and throttle positions are linked—eliminates “rammer hop” at start up; the operator no longer has to reach down and open the choke. Wacker Neuson. 800-770-0957.