Does your DA50 do this?
I have 2 freinds that have the DA50. They are the only people I know that have the DA50 and they are both having the same problem. One engine was one of the first out and has about 2 gallons thru it. The other is new with about 10 minutes run time.
Here is what happens, they start thier engines normally and start to taxi to the runway, as the plane is rolling at idle they stop it abruptly and it dies, every time. It also will die at idle if they lift the tail to move it from a restraining device after starting.
At toledo one of my friends went to the DA booth and explained the problem, they guy said he never heard of it so it cant be a problem. Several people behind my freind spoke up and said thier engines also do the same thing. The DA rep rolled his eyes and walked away.
The friend with the new DA50 called DA Friday and explained the problem, the person on the DA end said "we have heard of that" and are sending him a new carb.
The 1 year old engine has been tweaked alot. It has a new ignition, has had the needles tweaked lean until transition is poor and had the needles tweaked rich until it burbled a lot. Nothin seems to fix it.
Test your engine, let it roll at a walk at idle and stop it by putting you foot in front of the stab and letting the plane roll into your calf. See if your engine dies also.
Joe