For a tiller, I'd prefer a 4 stroke for quieter operation with lower RPM useable torque. Also, there's already a lot of vibrations on a tiller, I would assume the GX25 engine would be smoother as well. The additional weight of the 4 stroke engine is better for tilling.
I have an Echo bed redefiner with the 2 stroke engine, it's a 28cc engine, which I like a lot. Lots of power, smooth engine, but I have to keep the revs up to stay in the powerband. The screaming noise of the engine does get tiring after prolonged use.
This message was modified Apr 16, 2013 by aa335