No, it is my 4th gasser I think. Anyway, it seemed pretty smooth the first time I ran it, but this second time it seemed rougher. Maybe it just needs to break in and get tuned in all the way. Otherwise, this is a real sweet engine. Very high quality product and it starts and runs very easily.
One thing I really like about having the optical engine kill, when you flip the switch on the transmitter, you can hear the spark plug spark if you listen closely. This is nice to verify that you have spark. This has come in very handy with my DL 50.