GB-12
BKZ4500DL / BKZ5000DL
d. Keep the blade sharp. A dull blade increase the
chance of bounce.
e. Avoid feeding the blade too rapidly. The blade can
bounce away from material being cut if the blade is
fed faster than its cutting capability.
f. Cut only from your right to your left.
g. Keep your path of advance clear of material that has
been cut and other debris.
3. How you can maintain the best control:
a. Keep a good, firm grip on the unit with both hands. A
firm grip can help neutralize bounce. Keep your right
and left hands completely around the respective
handles.
b. Keep both feet spread apart in a comfortable stance
and yet braced for the possibility that the unit could
bounce. Do not overreach. Keep firm footing and
balance.
CUTTING WORK (LINE HEAD USAGE)
WARNING
1. Always wear eye protection such as safety
goggles. Never lean over the rotating cutting head.
Rocks or other debris could be thrown into eyes
and face and cause serious personal injury.
2. Keep the cutting attachment guard in place at all
times when the unit is operated.
TRIMMING GRASS AND WEEDS
• Always remember that the TIP of the line does cut-
ting. You will achieve better results by not crowding
the line into the cutting area. Allow the unit to trim at
its own pace.
1. Hold the unit so the head is off the ground and is tilted
about 20 degrees toward the sweep direction.
2. You can avoid thrown debris by sweeping from your
left to the right.
3. Use a slow, deliberate action to cut heavy growth.
The rate of cutting motion will depend on the material
being cut. Heavy growth will require slower action than
will light growth.
CUTTING METHOD
(a)Use the front left side cutting.
(b) Guide the blade from your right to left with it tilted
slightly to your left.
(c) When mowing a wide area, start working from your
left end to avoid interference of cut grass.
(d) The blade may be seized by weeds if the engine
speed is too low, or the blade cuts too deep into
weeds. Adjust the engine speed and cutting depth
according to the condition of object.
WARNING
• If the grass or other object gets caught in the blade,
or if the unit starts to shake or vibrate, turn off the
engine and check the whole unit. Change the blade
if it has been damaged.
• Turn off the engine and make sure the blade has
completely stop before checking the blade, and re-
moving any object got caught in.
WARNING
CONTROLLING BLADE BOUNCE
• Kick back can cause serious personal injury. Care-
fully study this section. It is important that you under-
stand what causes kick back, how you can reduce
the chance of kick back and how you can remain in
control of the unit if kick back does occur.
1. What causes kick back:
• Kick back can occur when the moving blade con-
tacts an object that it cannot cut. This contact causes
the blade to stop for an instant and then suddenly
move or ”bounce” away from the object that was hit.
The operator can lose control of the unit and the blade
can cause serious personal injury to the operator or
any person nearby if the blade contacts any part of
the body.
2. How you can reduce the chance of kick back:
a. Recognize that kick back can happen. By understand-
ing and knowing about bounce, you can help elimi-
nate the element of surprise.
b. Cut fibrous weeds and grass only. Do not let the blade
contact materials it cannot cut such as hard, woody
vines and brush or rocks, fences, metal, etc
c. Be extra prepared for bounce if you must cut where
you cannot see the blade making contact such as in
areas of dense growth.
8. Operation
