GB-15
G
B
BKZ4505DL / BKZ5010DL
8. Operation
9. Maintenance
4. Never swing the unit so hard as you are in danger of
losing your balance or control of the unit.
5. Try to control the cutting motion with the hip rather
than placing the full workload on the arm and hands.
6. Take precautions to avoid wire, grass and dead, dry,
long-stem weeds from wrapping around the head
shaft. Such materials can stall the head and cause
the clutch to slip, resulting in damage to the clutch
system if repeated frequently.
ADJUSTING THE LINE LENGTH
• Your brush cutter is equipped with a semi- auto type
nylon line head that allows the operator to advance
the line without stopping the engine. When the line
becomes short, lightly tap the head on the ground
while running the engine at full throttle.
• Each time the head is bumped, the line advances
about 25 mm. For better effect, tap the head on bear
ground or hard soil. Avoid bumping in thick, tall grass
as the engine may stall by overload.
• Make the right and left lines the same length when
using the nylon line head.
(Be sure to install the genuine Zenoah cutting attach-
ment guard when using the nylon line head.)
• If the lengths of the right and left lines are different,
the balance of the nylon line head will be disrupted,
resulting in increased vibration and product damage.
• If you feel a vibration increase or shaft tube shaking
while using the nylon line head, immediately stop op-
eration, check the following items, and correct any
problems.
The lengths of the right and left lines are significantly
different.
-->Make them the same length.
The cover is removed.
-->Make sure to install it securely.
There is a crack or damage outside.
-->Replace the damaged part.
• If vibration or shaking persists even after repairing, or
if you cannot identify the cause of abnormality, con-
tact your local authorized Zenoah dealer for repair.
• Never continue to operate the unit when vibration or
shaking of the shaft tube persists.
Every Every Every
25
50
100
System/components
Procedure
Before
hours hours hours Note
use
after
after
after
fuel leaks, fuel spillage
wipe out
✔
fuel tank, air filter, fuel filter
inspect/clean
✔
✔
replace, if necessary
see adjusting
replace carburetor
idle speed adjuster
✔
idling speed
if necessary
clean and readjust
GAP: 0.6 ~ 0.7 mm (.025 in)
spark plug
✔
plug gap
replace, if necessary
intake air cooling vent
clean
✔
throttle trigger, stop switch
check operation
✔
replace if
cutting parts
✔
something’s wrong
angle transmission
grease
✔
screws/nuts/bolts
tighten/replace
✔
✔
except adjusting screw
cutting attachment guard
make sure to attach
✔
flexible shaft
grease, seal
✔
ENGINE
SHAFT
BLADE
• Check the blade and the fasteners for looseness,
cracking, or bending.
• Check the cutting edges and reform with a flat file.
Point :
1. Keep the end corner sharp.
2. Round the root of the edge, using round file.
3. Do not use water when using a grinder.
• It is recommended that filing should be done by
professionals.
• Especially regarding filing the saw blade, Leave it to
the professionals.
