Hi. I recently bought a towerhobbies .46 bb abc engine, and It´s not running very well. First, the sound it makes is not as even as ALL the other engines, it sounds as if it were coughing once every 2 seconds or so. Second, when I start the engine the rpms it gives with the plug battery connected are way higher (20% or +) than when I disconnect the plug. I´ve tried NEW A3 and A8 plugs, but they show the same behavior. I can fly with the engine but I´m afraid it will stop while flying.
I have the following questions: Is the engine supposed to change rpms if I plug the clip while at max power? When the engine is at mid-power and I unplug the battery the rpm change is much less obvious. The manual recommends using "long glow plugs", would OS's A3/A8 be ok ? could this behavior (uneven sound ) be due to a bad break-in?
Thank you for you time and help, I hope you can help me.