09-22-2017, 08:15 AM
When the thin ring Mc6 came out, McCulloch was very distressed by the feedback they got. The ?100 Mc6 was eating their $125 Mc10's for lunch. The difference was amazing. Same displacement, both similar engines, but the Mc10 had the thick ring piston. McCulloch did some scrambling, and the last production runs of Mc10 came with a thin ring piston, as did the new Mc20. Of course, just before the Mc20 came out, Mac released the Mc10 stroker kit, and the smart guys installed that into their Mc10's instead of buying the new more expensive Mc20. Lo and behold! The stroked Mc10's had no trouble beating the new, wonderful Mc20-but that's another story! Ted