I have several different types of Echo weed whips. And lately I have noticed the high torque one to be getting really hot. It gets really hot where the motor meets the shaft. I have run through some of the general maintenance but I can't figure out why it would be getting so hot right there. It gets to the point that if I run it for a few lawns it will start to burn my arm. The motor it self runs fine, it cuts fine, and everything else is great excepts for the burning of my arm which I am afraid could lead to it just burning out. Please any advice. I will go get the official name and numbers of it and repost. Thanks!