Speed Control Switch; Trimming; Bump Feed Trimmer Line Feed; Helpful Cutting Tips - DeWalt DCST920 Instruction Manual

of charge in the battery is below the usable limit, the fuel gauge will not
illuminate and the battery will need to be recharged.
noTe: The fuel gauge is only an indication of the charge left on the battery
pack. It does not indicate appliance functionality and is subject to variation
based on product components, temperature and end-user application.
For more information regarding fuel gauge battery packs, please call
1-800-4-D WALT (1-800-433-9258) or visit our website www.dewalt.com.
e
Switching Trimmer on and off (Fig. 2)
To turn the appliance on, squeeze the lock-off lever (B) and then the
variable speed trigger (A). To turn the appliance off, release the variable
speed trigger and the lock-off lever.
WARNING:
Never attempt to lock the trigger in the
on position.
Speed control Switch (Fig. 2)
This string trimmer gives you the choice to operate at a more efficient
speed to extend the runtime for larger jobs, or accelerate the trimmer
speed for high-performance cutting.
To extend runtime, push the speed control switch (C) forward toward
the auxillary handle (D) into the "LO" position. This mode is best for
larger projects that require more time to complete.
To accelerate the trimmer, pull the speed control switch back toward
the battery housing (I) into the "HI" position. This mode is best to cut
through heavier growth and for applications that need higher RPM.
noTe: When in "HI" mode, runtime will be decreased as compared to
when trimmer is in "LO" mode.
Trimming (Fig. 7, 8)
With the trimmer on, angle it and swing side to side as shown in
Figure 7.
Maintain a minimum distance of 24 inches (610 mm) between the
guard and your feet as shown in Figure 8.
FIG. 7
WARNING:
with the ground (tilted no more than 30 degrees). This trimmer is not
an edger. DO NOT TIlT the trimmer so that the string is spinning near
a right angle to the ground. Flying debris can cause serious injury.

Bump Feed Trimmer Line Feed

Your trimmer uses 0.080 inches (2.032 mm) diameter nylon line.
Cutting line will wear faster and require more feeding if the cutting is
done along sidewalks or other abrasive surfaces or heavier weeds are
being cut.
As you use the trimmer, the string will get shorter due to wear. Gently
bump the trimmer on the ground while running at normal speed and
the line will feed.
noTe: Extending nylon line beyond the 13 inch (330 mm) swath will
negatively affect performance, runtime, and the life of the trimmer due to
potential of damaging motor. Doing so may void the warranty.

Helpful cutting Tips

• Use the tip of the string to do the cutting; do not force string head
into uncut grass.
• Wire and picket fences cause extra string wear, even breakage.
Stone and brick walls, curbs, and wood may wear string rapidly.
9
FIG. 8
MINIMUM
24 INCHES
(610 mm)
Keep the rotating string roughly parallel