Hi everyone i've worked on the carb and foud a lot of dust and particles inside the carb, in a little filter inside it. I've removed all dust and the engine rus great now.
Yu can see some pics here...
http://www.extremeaerobatics.com.ar/...php?f=13&t=529
Thanks a lot for the help.
Bye.
Leo
www.ExtremeAerobatics.com.ar