And I'll bet my DA50 will fly rings around your ZDZ50, Joe. [>:] Just kidding of course. But I still think this thread has gotten a little out of control. I have had the problem. I also have never had the engine quit in flight except once in about 20 flights, and that was my fault. If I had it to do over again I would not get another engine and I would not feel it necessary to run the engine on a test stand for an extended period of time. It appears there may be different levels to this problem and some have been luckier than others. How much of this problem is the engine and how much is the mechanic, is hard to say. Yes, it is a little frustrating to have to hold your plane to keep it from rolling. I never had a problem landing it at the higher idle (it doesn't have to be that high). If you don't want to play with idle-down, just run the idle down 3 or 4 clicks on final.

I don't know what the problem is. I do know DA is a great company that has been super to me. I know the DA50 is a beautiful piece of work. One of, if not the, lightest and most powerful engines in it's class. I'm sure DA is working on the problem. These kind of things are extremely hard to diagnose and correct.

If it is a flaw in the Walbro carb, then the engine breaking in should have nothing to do with it. I have no idea if some kind of internal part of the carb that affects fuel flow needs to seat properly over time.

If it is some sort of problem related to engine parts fit someplace in the power chain or fuel delivery system, it's going to be hard to find.

But this is not a problem that would stop me from buying the engine if I had it to do over again. My engine has maybe, 4 gallons through it, and is purring like a kitten.

The problem, if you have it, is manageable. and PS: the one dead stick I had was on the second flight [:-]. Scared the heck out of me until I realized the that darn WH Edge practically flies like a trainer. It has a great glide ration. My engine quit about 75 feet up. I made a 270 degree turn and lined up and landed on the runway like nothing was wrong.