Adjust The Balance - Echo WT-1610 Operator's Manual

ASSEMBLY

2.4 ADJUST THE BALANCE

There are two sets of holes in the axle plate for mounting the wheels.
NOTE
If using the No Spark Mow Ball, it is recommended to
mount the wheels in the rear set of holes. This will help
prevent the trimmer from tipping backwards when not
in use.
REAR HOLE
WHEELED TRIMMER 5