Echo DSRM-2600 Operator's Manual page 26

Maintenance and care
Checking the blade
Loading nylon line
 Turn off the unit, remove the battery and make sure nylon line cutting head has stopped rotating before starting re-
placement procedure.
To do so could lead to an accident or serious injury.
 Use only flexible, non-metallic line recommended by YAMABIKO Corporation.
Failure to do so could lead to an accident or serious injury.
thread of nut could be broken.
7. Remove locking tool.
 Use only blade designated for this model by the manufacturer.
 When a crack is noticed on the blade, do not use it but replace
with a new one.
 Ensure that the blade is correctly fitted in accordance with the
instructions.
 When the cutting blade becomes dull due to wear reverse it for
further use.
 When chip or bend occurs on the blade, vibration will increase.
Replace with new one.
 When filing the blade file 3 cutting edges evenly using a flat file
as shown in the illustration. Otherwise, the balance will be lost
and vibration will increase.
DANGER
WARNING
1. Cut one piece of line to recommended length.
 2.4 mm dia. - 3.5 m
2. Align arrows on top of knob with openings in eyelets.
3. Insert one end of nylon line into an eyelet, and push line
equal distance through nylon line cutting head.
4. Hold nylon line cutting head while turning knob clockwise to
wind line onto spool until about 13 cm of each line remains
exposed.
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