15
SETTING TILT ANGLE OF HANDLE
Handle of the petrol grass cutter allows for tilt angle adjustment.
Ergonomic tilt angle setting allows for long operation of the tool
without operator fatigue.
•
Switch off engine of the petrol grass cutter.
•
Loosen fixing screws (
14
) (
fig. A
).
•
Set required handle tilt angle.
•
Tighten the fixing screws.
INSTALLATION AND ADJUSTMENT OF SHOULDER STRAP
Switch off the engine before installation and adjustment of
the shoulder strap and shoulder strap holder.
Appropriate adjustment of the shoulder strap facilitates using the
device.
•
Put the shoulder strap spring hook (
31
) (
fig. H
) in the shoulder
strap holder (
2
).
•
Adjust the shoulder strap so the cutting element is parallel to
the ground.
•
Carefully put the cutting element (
13
) on the ground.
•
Move the shoulder strap holder so the grass cutter is properly
balanced.
•
When using three-blade knife, hold the knife approx. 10 cm
above the ground, so it does not touch the ground.
•
Use the shoulder strap fastener (
32
) (
fig. I
) to adjust shoulder
strap length to set the most comfortable working position.
There is spring hook with quick release mechanism on the end
of the shoulder strap. Use it in emergency situation, when you
need to immediately free from the device.
Petrol grass cutter must always be attached to shoulder strap
during operation. Otherwise safe manoeuvring the grass
cutter is impossible, it may lead to injuries of the operator or
other persons. Never use the shoulder strap with faulty quick-
release mechanism.
OPERATION / SETTINGS
PREPARATION OF FUEL BLEND
As a fuel for the petrol grass cutter use petrol-oil blend at a
25:1 ratio.
Most problems with combustion engines result directly or
indirectly from fuel used. You must not use oil designed for
four-stroke engines to prepare fuel blend. Never mix petrol
with oil inside the grass cutter fuel tank.
Always mix petrol with oil in a canister designed for such purpose.
Accordingly to the below table, mix petrol (lead-free with octane
number 95) with good quality engine oil for two stroke engines
at a 25:1 ratio.
Petrol
Two-stroke engines oil
1 litre
40 ml
2 litres
80 ml
5 litres
200 ml
•
Pour appropriate amount of oil into a canister, and add exactly
measured amount of petrol.
•
Screw the cap and mix thoroughly.
STARTING THE ENGINE
Never start the engine without shield for cutting element
installed. Use of improper or damaged shields may cause
serious injuries.
Improperly wound cutting line or inappropriate cutting
accessories cause increased vibrations.
The petrol grass cutter is equipped with the switch, which protects
against accidental starting.
Switching on
– move ignition switch (
28
) (
fig. G
) to “
start
”
position, choke lever (
38
) (
fig. N
) to ”
ON
”, position and pull the
starter line strongly. After few failed attempts pump fuel with the
membrane pump (
39
) (
fig. N
) and try again. After starting the
engine you can start working after more than ten seconds. Switch
off choke by slowly moving choke lever to “
OFF
” position.
To increase engine speed press the button for locking throttle
lever (
29
) and press throttle lever (
30
) (
fig. G
).
Switching off
– release pressure on the throttle lever (
30
). Move
the ignition switch (
28
) to „
stop
” position.
Cutting parts rotate for some time after the motor is switched
off. Never use the petrol grass cutter during rain and in
moisture environment. Never operate faulty device. All parts
must be assembled properly and must fulfill requirements
that ensure safe operation of the petrol grass cutter. Any
damaged protective element or part must be repaired or
replaced immediately.
IDLE RUNNING SPEED ADJUSTMENT
Adjust idle running speed if the cutting element rotates even
when the throttle lever (30) (fig. G) is in idle position.
Engine idle speed should be adjusted so the engine does not
stall and the cutting element does not rotate. If engine speed
is too high or too low after switching the grass cutter, adjust
idle engine speed.
Summary of Contents for 50G491
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