Worked on about all of them. The Troy-Bilt Horse is still decent, and probably the best of the consumer brands.
Just out of curiosity, what killed your Husquvarna? I try to talk people into fixing what they have, since the quality of new stuff seems to be in constant decline.
If shopping used, be aware that Techumseh engines is no longer in business, and parts can be difficult, if not impossible to get.
I use an about 40 year old Howard Gem....best rear tine tiller ever built, hands down!
