Brian, I have an enduro 702 with the same problem. I fixed it by re-inserting a new Pawl Clutch - part number 0693200004 - price AUS$8.80. My pawl clutch had broken and fallen out - appears to be a common problem !
The Pawl Clutch is a small white plastic part that clips onto a spline and engages with a gear that is directly attached to the agitator. I'm happy to send some photos if you want more info.
Markpam@adam.com.au
Mark Ridley
February 2008