Hi rod,
I have experienced brush cutter clutches slipping intermittently. I have found that it seems to happen after use when the machine heats up. If it only works when the unit is cold then I would assume you are having the same difficulties. Maybe try disassembling the unit again and taking the clutch drum off, and then inspect the clutch lining condition.
I know I only paid about $30 for echo shoes so if you find the parts it should be cheep enough but I have no idea about the availability, but I am sure Bruce will help out there!.
Regards jay
