I have not run the DA 50 but I have owned both a ZDZ and a Taurus 52. I had the never ending problem of a hard starting ZDZ. There were countless threads posted in the engine forum about it taking 20, to 30 flips to get it running. Of course we were told we didn't know how to tune a gas engine, user error, bla, bla, bla. Got great service from the dealer, they sent me a new carb, talked to tech support. No joy. I sold the motor and bought a Taurus 52. Installed it with the same fuel system, same battery, switch, ect.... Closed the choke, ignition on, couple flips, it pops, choke off, one flip its running. Engine runs like a top. Although the exercise was probably good for me, I personally am going to stay away from another ZDZ.