POWERLOAD-FAIL
EGO · ST1521S PowerLoad Trimmer 15 in 56V Cordless String Trimmer with Automatic Line Feed
The POWERLOAD system does not wind the line automatically when activated — ensure the line is the correct diameter and length, thread the line through the eyelet correctly before pressing the POWERLOAD button, and verify the spool is properly seated; if the winding motor spins but does not pull the line, the POWERLOAD mechanism clutch may need service
Error POWERLOAD-FAIL on the EGO ST1521S PowerLoad Trimmer 15 in 56V Cordless String Trimmer with Automatic Line Feed means: POWERLOAD Auto-Wind Not Working. The top-ranked community fix is “Service or Replace the POWERLOAD Clutch Mechanism” (medium difficulty, ~45 min, DIY cost: $15-$25). 2 community-ranked fixes available below.
Published February 2026 · 2 fixes · string trimmer
Content is based on manufacturer service documentation, community repair experience, and OEM technical bulletins. Always verify with your owner's manual.Learn about our editorial standards.
While many string trimmer repairs can be done safely at home, consider hiring a qualified technician if:
Average professional repair cost for this issue: $120-$180.
Battery Single LED Flashing
Battery Too Cold to Operate
Battery Overtemperature Protection
Battery LEDs Not Lighting Up
Battery Not Recognized by Tool
Battery Self-Maintenance Mode Active
Charger Alternating Red-Green Flash
Charger Solid Green Light
The EGO ST1521S PowerLoad Trimmer 15 in 56V Cordless String Trimmer with Automatic Line Feed has 8 other known error codes:
Ad Space — banner
Replace ADSENSE_PUBLISHER_ID in AdUnit.tsx