🚨 Ryobi RY25360 Weed Eater Engine fires up but the trimmer spool head spins constantly at idle
Top Culprit: Snapped internal centrifugal clutch spring
Why It Happens: Overheating or metal fatigue snaps the small tension spring that keeps the clutch shoes pulled away from the outer drum at low idle.
🛠️ The 60-Second Diagnostic Test
- Set the trimmer down safely and start the engine; if the head spins while idling without you touching the gas, the clutch is stuck.
- Shut it down, split the upper shaft coupling boom assembly, and look inside the clutch drum to check for loose shoe metal.
💡 The Quick Fix Steps
- Unbolt the trimmer engine housing from the clutch drum housing to expose the two internal weighted shoes.
- Remove the broken spring pieces and hook a new high-tension centrifugal clutch spring across both shoes, or swap the full clutch hub.