This is a multi-part message in MIME format. Oh Now it is so much clearer!!!!! Dennis "It is by Caffeine alone that I set my mind in motion It is by the beans of Java, that my thoguhts aquire speed the hands acquire shakes; the shakes become a warning It is by Caffeine alone that I set my mind in motion" So, to sum up for the easily confused or electrically/mechanically challenged. If the air flow is through and/or around the motor then intake filtering with a non restrictive filter element is advised. Also a periodic disassemble, clean, and inspect is required to remove foreign material from bushings and other rotating parts.