Sorry new to RC,the box says 0.15, 2.5cc, 4 stroke
engine it also says to use 10 - 20% fuel. I tried running it a bit rich and it stopped backfiring but when I remove the glow starter the engine cuts out. Is it just getting the main needle and carburettor (that may not be spelt right)set up right. I read something about plugs being too hot
somewhere should I just put the old plug back. What is a good plug/temp to use/run at. Sorry for so many questions I appreciate the help.(2.5 not 3.5cc for anyone who read this)