VERTO 50G490, Manual

Page: 14 / 100

14
PREPARATION FOR OPERATION
INSTALLATION OF THREE-BLADE KNIFE AND COVER OF SPOOL
WITH CUTTING LINE
Petrol grass cutter allows to work with three-blade knife and
cutting line, depending on the needs.
Do not operate the petrol grass cutter without shield installed.
INSTALLATION OF THREE-BLADE KNIFE
• Install shield ( 12 ).
• Install three-blade knife ( 24 ) ( fig. F ) on the spindle ( 22 ).
• Put washer on, use the supplied key to tighten the nut while
keeping hexagonal key in the spindle lock hole to lock the spindle
(
22 ) ( fig. E ).
INSTALLATION OF COVER OF SPOOL WITH CUTTING LINE
• Install shield ( 12 ).
• Screw cover of spool with cutting line ( 15 ) onto spindle ( 22 )
counter-clockwise.
• Put end of the hexagonal key into spindle lock hole ( 23 ) to lock
the spindle ( fig. E ).
• Tighten cover of spool with cutting line.
• Before operation remove cover from the blade for cutting excess
cutting line (
25 ) ( fig. F ).
INSTALLATION OF HANDLE
Handle ( 9 ) allows easy and ergonomic operation of the petrol grass
cutter
• Set handle ( 9 ) on the drive shaft cover ( 11 ).
• Use six supplied fixing screws ( 14 ) to install the handle ( fig. A ).
• Adjust handle to ergonomic position.
• Tighten fixing screws with supplied key.
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 4 0 ml
2 litres 8 0 ml
5 litres 2 00 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.
• Locate the idle running speed adjustment screw ( 40 ) behind the
air filter casing ( 5 ) ( fig. N ).
• Start the grass cutter engine.
• Use screwdriver to carefully turn the idle running speed
adjustment screw (clockwise to increase speed, counter-clockwise
to reduce speed).
INSTRUCTIONS REGARDING SAFE USE
• When cutting high grass perform the work gradually, by layers.
• Keep the petrol grass cutter away from hard objects and cultivated
plants.
• Operate the petrol grass cutter only when the grass is dry.
• When trimming edges drive the tool along lawn edge.