Motors often have a diagram on the side. If it has a diagram, it mayshow how to wire the motor for 110 AC or 220 AC. It will show a notethat says "to reverse motor, reverse black and blue wires" or other colorsdepending on the manufacturer. Clean off the side of the motor and seeif you can find any kind of diagram. If it has no diagram, then I don't knowwhat to tell you. Smaller cheap motors like a muffin-fan motor does not haveany method of reversing that i know of.