HCS-2810 / 3810 MAINTENANCE
X7702248300 35
© 09/19 ECHO Incorporated
Sharpening 
Level 2. 
If a power grinder is used DO NOT allow blade to over heat.
1. Move stop switch to STOP 
position.
2. Disconnect spark plug wire.
3. Remove blade guard.
4. Slide blades to allow file 
clearance using slots (A) on 
bottom of blade. Do not pry 
against cutting edges. 
5. File each edge carefully. Follow 
the original shape of the blade.
6. Install blade guard.
Use new lock nuts each time blade guard is installed. See dealer for 
correct nuts. 
7. Lubricate blades (see “Lubrication”).
8. Connect spark plug wire.