V165 Troy Built Tuffy Tiller gets Harbor Freight Engine

I bought this tiller in 93. The engine has always been a problem. This year was the worst. I managed to keep it going long enough to till the lower half of the garden. The next day, it would not start. Hardly any compression. I started looking for a parts source and could not find one. Looking for another engine and Harbor Freight shows up. Predator Engines 79cc. So far, so good.