have recently bought an engine techumseh HH120 has durlock rod bolts ,cast iron cylinder,cast iron rod ,and ball bearings for longer engine life has four stars on blower housing is (green in color) and runs very well. for the 10 bucks i paid ,no smoke at all however it has a large pully and ya need to wind a string around this and yank ,is there a model that i could find with a recoil starting system ,otherwise it will start first pull ,came off an old shot snowblower i junked that,, was all beat up.gonna make a homemade any thing goes puller out of it thanks for sharing knolwledge with me timbo