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6
Starting Procedure
2. Set the throttle trigger to the “fast idle”
position by performing the following:
a. Depress and hold the throttle lock,
and then squeeze the throttle trigger.
b. Depress and hold the “fast idle”
button.
c. While depressing the fast idle button,
release the throttle lock and throttle
trigger.
3. Prime the carburetor by repeatedly
depressing the carburetor primer bulb
until clear fuel can be seen flowing
through the transparent primer bulb.
Throttle
Trigger
Throttle
Lock
Fast Idle
Button
WARNING!
KEEP CLEAR OF THE CUTTING
ATTACHMENT DURING STARTING
OPERATIONS! THE CUTTERS
MAY MOVE WHEN THE ENGINE IS
STARTED!
n Place the trimmer on the ground
during all starting operations.
n Make sure you have a secure foot-
ing, and keep a rm grip on the unit
as well.
n Keep all bystanders and pets well
clear of the trimmer during starting
operations.
Choke
Closed
Figure 7
Figure 6
IMPORTANT!
Engine ignition is controlled by a two-position on-off switch mounted on the throttle
body. This switch is typically labeled “I” for ON and “O” for OFF.
If the Engine Does Not Start
n Repeat the appropriate starting proce-
dure for a cold or warm engine.
n If the engine still fails to start, use
the procedures for “Starting a flooded
engine,” on the next page.
WARNING!
The cutting attachment will move when
the engine accelerates!
When the Engine Starts or Fires
1. Open the choke by moving the choke
lever backward (toward the fuel tank).
2. If the engine does not continue to run,
repeat the appropriate cranking proce-
dures for a cold or warm engine.
3. When the engine starts, clear excess
fuel from the combustion chamber by
accelerating the engine several times
with the throttle lever.
4. Operating the throttle will automatically
disengage the fast idle setting.
1. Place the unit on the ground. Grip the
engine cover with your left hand and
the starter handle with your right hand
(shown).
2. Pull the starter handle slowly toward
you until you feel the starter mechanism
engage.
3. Start the trimmer by pulling the starting
handle rapidly outward.
Cranking the Engine
Figure 8
1. Move the ignition stop switch to the rear
(towards the grip) to the “I” or ON posi-
tion. See Figure 4.
4. (Cold engine only) Choke the engine
by moving the choke lever forward to
the “closed” position. See Figure 7.
IMPORTANT!
The primer system only pushes fuel through
the carburetor. Repeatedly pressing the
primer bulb will not ood the engine with fuel.
Operation
n Squeezing the throttle increases engine
speed, causing the clutch to engage and
operate the cutters.
n Releasing the throttle decreases
engine speed, causing the cutters to
slow, and then stop altogether as the
clutch disengages.
n Use a sweeping motion when cutting,
and vary throttle settings often.
n Avoid cutting material larger than
1.27 cm in diameter.
CAUTION!
The recoil starter can be easily
damaged by abuse!
n Always engage the starter before
attempting to crank the engine.
n Never pull the starter cord to its full
length.
n Always rewind the starter cord
slowly.
DH2510
Figure 5
Throttle
Trigger
Throttle
Lock
Fast Idle
Button
HT2510
DH2510
Figure 4
HT2510
Ignition ON
Ignition
Switch
Ignition
Switch
Ignition ON
Primer Bulb
(viewed from
rear)