I bought a Robbins/Subaru engine as a replacement for the B&S on our rototiller last year. I have to tell you, that R/S engine is the highest quality small engine I've ever seen in my life. It is truly astounding. I bought it new, in the box, from a seller on E-Bay. It cost me $150. It started on the first pull the first time I tried it, it has started on the first pull every time since. Plenty of power, idles down to just about zero RPM, reasonably quiet with no rattles too. Oh, and did I mention it actually comes with a real Owner's Manual that actually gives useful information?