With the front of the blender facing you, take a nut driver and place it against one of the clutch fins strike it from forward toward the back of the unit. Do not strike it too hard. This will loosen the clutch altough it won't look like it. To replace it, reverse the direction while hand tightning. Then, put the blending cup back on with a little ice and run the unit to tighten it down.
Tim the bartender
May 2005