...over heating - glow plug is tight? I bought a brand new engine for rc car , it is a sanyo pull start and when i first started it up it started smoking from head. The head is screwed completely on. The engine has good compression, also it idles at a high rpm- sounds like half throttle- the carb is tight and has seal. Any ideas on what is going on?? Also do you know the factory setting for the high speed needle and the low speed needle?