I have a 45cc gas engine that is new. Now, this is my first gas engine but I know that glow engine can have some vibration in it. This engine seems to vibrate quite a bit. Is this normal? It shakes my whole plane. Is there a way I can smooth it out? I have also noticed that it has a vibration at mid-range and smooths out at full throttle. Can anyone help me figure out how to correct this???

THANKS!!!