I have been noticing recently that my P2 makes a slight squeal(for lack of a better description) that seems to occur only when I am making a pivot turn, left or right on the throttle stick. Am I on my way to loose that motor ? Do these things squeal as they are dying or ? No excessive heat build up noted by touch. I have seen some posts about people lubricating these things.... True or false ? At this point I have probably 60-70 hours total it. Any ideas out there ???