I'm new to the E-nation. I have had my G2 for 2 years and have around 300 hrs on it. I have a shudder when I accelerate around 1400 to 1900. I have had the spark plugs changed once about 150 hrs ago. After that she ran better with a slightly less of a shudder. It is worse now, I pulled a couple plugs to look and they are defintly on the rich side (black with carbon). I don't run alot of low RPM. The engine did have a overtemp problem and my dealer has got that resolved. Has anyone else had spark plug issues with these engine's?