I have four .46 O.S. LA's on my C-130, which was first flown in 2006.
This aircraft is typically flown once a year at my home club's annual Flying Circus event; the rest of the year the wing hangs on the wall collecting dust.
When 'show time' comes around, I service the fuel tanks, connect the external glow and the moment the fuel reaches the carbs, the engines fire; I have never experienced a flame-out or any problems with these engines.
http://www.youtube.com/watch?v=fwNr9Zik25I
http://www.youtube.com/watch?v=f46Pn...eature=related
I also have an O.S. 1.60 2-stroke in my DP Supercub and have never had any problems with it; this is a very easy-starting strong engine primarily setup for aero-towing and aerobatics.
My experience with O.S. 2-stroke engines has been very good so far.
Joe