I've been flying my 2 year old DL50 with the original plug. Pulled it to put in a brand new CM6 - at least the box said it was. Had a dead stick on 3rd flight, the first dead stick ever with the DL. Landed and got it restarted. It ran really rough and would not throttle up w/o dying.

Went home, took carb out and cleaned it w/carb cleaner. Put carb back on and it did about the same thing. Pulled plug, put orig. plug back in. Tuned it a little and everything was back to normal. Looked at what I thought was a CM6, it was not. Someone must have stuffed a no name plug in a CM6 box that I ended up buying.

Go figure.