Stihl 4180 Series - Troubleshooting Common Issues; Clutch Malfunctions and Solutions

7Series 4180 Powerhead
4. Troubleshooting
4.1 Clutch
Condition Cause Remedy
Attachment stops under load at full
throttle
Clutch badly worn Install new clutch
Clutch drum badly worn Install new clutch drum
Attachment runs when engine is
idling
Engine idle speed too high Readjust with idle speed screw
(counterclockwise)
Clutch springs stretched or fatigued Install new clutch
Spring hooks broken Install new clutch