I just pulled the HH120 out of my wifes sears and put a newer engine in. Engine ran great all last year with the small exception of a carburetor leak. The leak was fixed by just adjusting the float bowl. I have detected a small puff of smoke on start up and does consume a small amount of oil I am including everything all engine tins, carburetor, starter/gen, ignition electronics, sears suburban ignition switch also included. 250.00 ready to run just add a battery and wiring.
Here is a video clip of the engine running this past winter
I also have two HH120 parts engines that would be willing to sell whole or as parts neither of them have carbs or electronics. One of the two parts engine can probably be used again but the exhaust port is broken and had a broken head bolt that someone drilled out and put a larger diameter head bolt in...thats why its a parts engine.