142RB/ 152RB
Operator's Manual
Read through the Operator‘s Manual carefully and
understand the content before using the machine.
101 90 47-26
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CONTENTS
Husqvarna AB has a policy of continuous product
development and therefore reserves the right to modify the
design and appearance of products without prior notice.
List of contents
SYMBOL EXPLANATION
Symbols ............................................................................... 2
CONTENTS
List of contents .................................................................... 3
SAFETY INSTRUCTIONS
WARNING!
Under no circumstances may the design
of the machine be modified without the
!
Personal protective equipment ............................................. 4
The machine‘s safety equipment .......................................... 4
Control, maintenance and service of the machine‘s safety
equipment ...................................................................... 6
Cutting equipment .............................................................. 8
General safety instructions ................................................... 9
General working instructions ............................................. 10
Adjusting the harness and clearing saw ............................... 10
Basic clearing techniques.................................................... 11
WHAT IS WHAT?
permission of the manufacturer. Always
use genuine accessories. Non-authorized
modifications and/or accessories can
result in serious personal injury or the
death of the operator or others.
What is what on the grass trimmer/brush cutter? ............... 13
ASSEMBLY
Assembling the J-handle .................................................... 14
Assembly of the blade and trimmer head............................ 14
Assembling the transport guard.......................................... 14
Assembling the blade guard and grass blade ....................... 14
Assembling other guards and cutting equipment ................ 15
Assembling the spray guard ................................................ 15
Assembling the flexible shaft .............................................. 15
Connecting throttle cable and stop switch wires................. 15
Cable adjustment ............................................................... 16
Adjusting the harness and clearing saw ............................... 16
FUEL HANDLING
Fuel mixture ...................................................................... 17
Fuelling.............................................................................. 17
START AND STOP
Control before starting....................................................... 18
Start and stop..................................................................... 18
MAINTENANCE
Carburettor ........................................................................ 19
Muffler .............................................................................. 19
Cooling system .................................................................. 20
Air filter ............................................................................. 20
Drive shaft ......................................................................... 20
Angle gear .......................................................................... 21
Spark plug.......................................................................... 21
Filing the grass blade .......................................................... 21
Maintenance schedule ........................................................ 22
TECHNICAL DATA
142RB/152RB ................................................................... 23
English – 3
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SAFETY INSTRUCTIONS
Personal protective equipment
The machine‘s safety equipment
This section describes the machine‘s safety equipment, its
function and how checks and maintenance are carried out to
ensure that it operates correctly. (See the chapter “What is
what“ to locate where this equipment is positioned on your
machine.)
IMPORTANT INFORMATION
•
A brush cutter, brushcutter or trimmer used
incorrectly or carelessly can become a dangerous
tool, that can cause serious or fatal injury to the
operator or others. It is extremely important that
you read and understand the content of this
manual.
WARNING!
Never use a machine with defective safety
•
When using a brush cutter, brushcutter or trimmer,
personal protective equipment approved by the
appropriate authorities must be used. Personal
protective equipment does not eliminate the risk of
accidents, however, it can reduce the effects of an
injury in the event of an accident. Ask your dealer
for help when choosing protective equipment.
equipment. Follow the control,
maintenance and service instructions
described in this section.
!
1. Throttle trigger
lock
The throttle trigger lock is
designed to prevent the
throttle from accidentally
WARNING!
Remove your hearing protection as soon as
you stop the engine, so that you can hear
any noises or warning signals.
being engaged. When the
A
!
trigger lock (A) is pressed
into the handle (= when you
hold the handle) the throttle
(B) is released. When the
grip on the handle is
HELMET
A helmet should be worn if
trees to be cleared are higher
than 2 metres.
B
released the throttle and the
throttle trigger lock return
to their original positions.
This takes place via two
independent return spring
systems. This means that the
throttle is automatically
locked in its “idling“
EAR PROTECTION
Ear protection offering
sufficient dampening effect
should be used.
EYE PROTECTION
Blows from branches or
objects thrown by the
rotating cutting equipment
can damage the eyes.
position.
2. Stop switch
The stop switch should be
used to stop the engine.
GLOVES
"
Gloves should be worn when
necessary, e.g., when
assembling cutting
equipment.
BOOTS
Use anti-slip and stable
boots.
3. Cutting
attachment guard
This guard is intended to
prevent objects from being
thrown towards the
operator and to protect the
operator from
CLOTHING
Wear clothes made of a
strong fabric and avoid loose
clothing that can catch on
shrubs and branches.Always
wear heavy-duty long pants.
Do not wear jewellery, shorts,
sandals or go barefoot. Secure
hair so it is above shoulder
level.
unintentionel contact with
the cutting attachment.
WARNING!
Under no circumstances may the cutting
equipment be used without an approved
guard fitted. See the chapter “Technical
data”. If the wrong guard or a defective
guard is fitted this can cause serious
personal injury.
FIRST AID KIT
!
A first aid kit should be
carried by operators of brush
cutters, brushcutters or
trimmers.
4– English
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SAFETY INSTRUCTIONS
6. Muffler
4. Vibration
damping system
The muffler is designed to
give the lowest possible noise
level and to direct the
engine‘s exhaust fumes away
from the operator. .
Your machine is equipped
with a vibration damping
system, which is designed to
give as vibration-free and
comfortable use as possible.
In countries that have a
warm and dry climate the
risk of fire is obvious. We
have therefore fitted certain
mufflers with a spark arrestor
screen. Make sure that your
muffler is fitted with this
kind of screen.
The use of blunt or
incorrect cutting equipment
(the wrong type or
incorrectly sharpened, see
the section “Sharpening the
blade“ ) increases the level of
vibration.
It is extremely important that
the instructions for checking,
maintaining and servicing the
muffler are followed. (see the
section “Control, maintenance
and service of the machine‘s
safety equipment“).
The machine’s vibration
damping system reduces the
transfer of vibrations
between the engine unit/
cutting equipment and the
machine’s handle unit.
WARNING!
Bear in mind that exhaust fumes:
WARNING!
Over exposure to vibrations can result in
!
• contain carbon monoxide, which can
cause carbon monoxide poisoning.
Therefore never start or run the machine
indoors.
• are hot and can contain sparks that can
cause fires. Never start the machine
indoors or close to inflammable material.
!
blood-vessel or nerve injury to persons
suffering with blood circulation problems.
Seek medical attention if you experience
physical symptoms that can be related to
over exposure to vibrations. Examples of
such symptoms are “numbness“, lack of
feeling, “tickling“, “pricking“, “pain“, lack
of or a reduction in normal strength,
changes in the colour of the skin or its
surfaces. These symptoms normally
appear in the fingers, hands or wrists.
7. Cutting
equipment
1
1) Grass blades are
intended for brush cutting.
5. Quick-release
2
2) The trimmer head is
intended for trimming
grass.
There is an easily accessible,
quick-release catch fitted to
the chest as a safety
precaution in the event of a
fire in the engine or for any
other situation that requires
you to free yourself from the
machine and harness. See the
section “Adjusting the harness
and brush cutter“.
8. Locking nut
A locking nut is used to
secure some types of cutting
equipment on the output
shaft.
English – 5
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SAFETY INSTRUCTIONS
3. Cutting
attachment guard
Control, maintenance and service of
the machine‘s safety equipment
• Check that the guard is
undamaged and not
cracked.
IMPORTANT INFORMATION
•
•
All service and repairs to the machine require
special training.
• Replace the guard if it
has been exposed to
impact or is cracked.
This applies especially to the machine‘s safety
equipment. If the machine does not meet any of
the controls listed below you should contact your
service workshop.
• Always use the prescribed
blade an guard
combination, see chapter
"Technical data".
•
The purchase of one of our products guarantees
that professional repair and servicing will be
carried out on it. If the point of purchase is not
one of our servicing dealers, please ask for
details of the closest service workshop.
4. Vibration
damping system
1. Throttle trigger
lock
• Check the vibration
damping element
regularly for material
cracks and distortion.
• Check that the throttle is
locked in the “idling
position“ when the
throttle trigger lock is in
its original position.
• Check that the vibration
damping element is
undamaged and securely
attached.
• Press in the throttle
trigger lock and make sure
it returns to its original
position when released.
• Ensure that the throttle
and throttle trigger lock
move easily and that their
return spring systems
function.
5. Muffler
1.Never use a machine that
has a defective muffler.
• See section "Start". Start
the machine and apply
full throttle. Release the
throttle and check that the
cutting equipment stops
and remains at a standstill.
If the cutting equipment
rotates with the throttle in
the idling position then
the carburettor‘s idling
setting must be checked.
See chapter
2.Check regularly that the
muffler is secure.
3.If your muffler is fitted
with a spark arrestor
screen then it should be
cleaned regularly. A
blocked screen leads to
the engine overheating
with serious damage as a
result. Never use a
#
“Maintenance“.
muffler with a defective
spark arrestor screen.
2. Stop switch
• Start the engine and make
sure that the engine stops
when the stop switch is
moved to the stop
position.
6– English
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SAFETY INSTRUCTIONS
6. Cutting equipment
7. Quick-release
This section describes how through correct maintenance and
through using the right type of cutting equipment you can:
• Reduce the machine‘s tendency to kickback
• Obtain maximum cutting capacity.
• Increase the service life of the cutting equipment.
• Check that the harness
straps are correctly
positioned. When the
harness and machine are
adjusted, check the harness‘
safety release catch to
The three basic rules:
ensure it works correctly.
1)Only use the cutting
and guard equipment
we recommend! See
chapter “Technical
data“.
8. Locking nut
• Protect your hand from
injury when assembling,
use the blade guard as
protection when tightening
with a socket spanner.
Tighten the nut by turning
against the direction of
rotation. Loosen the nut by
turning in the direction of
rotation. (NOTE! the nut
has a left-hand thread).
2)Keep the blade‘s teeth
well and correctly
sharpened! Follow our
instructions and use the
recommended filing
gauge. An incorrectly
sharpened or damaged
blade increases the risk
of an accident.
• Tighten the nut using a
socket spanner, 35 - 50
Nm (3.5 - 5 kpm).
3)Check the cutting
equipment with regard
to damage and crack
formation. Damaged
cutting equipment
should always be
replaced.
NOTE!
The locking nut‘s nylon lock
must not be so worn that it
can be turned by hand. The
lock shall hold at least 1.5
Nm. The nut should be
replaced after it has been put
on approx. 10 times.
WARNING!
Never use a machine with defective
safety equipment.The safety equipment
should be maintained as described in
this section. If your machine does not
meet any of these controls you should
contact your service workshop.
!
English – 7
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SAFETY INSTRUCTIONS
Trimmer head
Cutting equipment
IMPORTANT INFORMATION
• Only use a trimmer head
and trimmer cord that is
The section describes how through correct
maintenance and through using the right type of
cutting equipment you can reduce the machine‘s
tendency to kickback, obtain maximum clearing
capacity and increase the service life of the cutting
equipment.
recommended. These
have been tested by the
manufacturer to suit a
particular engine size.
This is especially
important when a fully
automatic trimmer head
is used. Only use the
cutting equipment we
recommend! See chapter
“Technical data“.
•
Only use the cutting and guard equipment we
recommend! See chapter “Technical data“.
•
•
Refer to the instructions for the cutting equipment
for the correct winding of cord and for the
selection of the right cord diameter.
Keep the blade’s teeth well and correctly
• Generally smaller machines require a small trimmer head
and vice versa. This is because when clearing using a cord
the engine must throw out the cord radially from the
trimmer head and also meet resistance from the grass being
cleared.
sharpened! Follow our recommendations. Also
refer to the instructions on the blade packaging.
WARNING!
Incorrect cutting equipment or an
!
incorrectly sharpened blade increases
the risk of kickback.
• The length of the cord is also important. A longer cord
requires greater engine power than a shorter cord of the
same diameter.
Filing the grass
blade
• Make sure the knife positioned on the trimmer guard is
intact. This is used to cut the cord to the correct length.
• See the cutting
equipment’s packaging for
correct filing instructions.
• To increase the life of the cord it can be soaked in water for
a few days. This will make the line tougher and it will keep
longer.
IMPORTANT INFORMATION
• The blades are sharpened
using a single cut flat file.
Always ensure the trimmer cord is wound tightly
and evenly around the drum, otherwise harmful
vibrations will occur.
• Sharpen all edges equally
to maintain the balance of
the blade.
WARNING!
Always stop the engine before starting
work on any part of the cutting
!
equipment. This continues to rotate even
after the throttle has been released.
Ensure that the cutting equipment has
stopped completely and remove the cable
from the spark plug before you start to
work on it.
8– English
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SAFETY INSTRUCTIONS
Fuel safety
General safety instructions
IMPORTANT INFORMATION
• Always use a fuel container
with an anti-spill valve.
• The machine is only designed for trimming grass
and brush cutting.
• Never fill the machine
while the engine is
• The only accessories to be used with the engine unit
as a drive source are the cutting units we
running. Always stop the
engine and let it cool for a
few minutes before
refuelling.
recommend in the chapter “Technical data“.
• Never use the machine if you are tired, if you have
consumed alcohol, or if you are taking medicines
that can affect your sight, your judgement or the
control of your body.
• Provide good ventilation
when filling or mixing fuel
(petrol and 2-stroke oil).
Min 3 m
(10ft)
• Use personal protective equipment. See the section
“Personal protective equipment“.
• Never use a machine that has been modified so that
it no longer corresponds with the original design.
• Move the machine at least
3 m from the filling
position before starting.
• Never use a machine that is faulty. Follow the
maintenance, control and service instructions in this
Operator‘s Manual. Some maintenance and service
actions should be carried out by trained and
• Never start the machine:
qualified specialists. See the chapter “Maintenance“.
a)If you have spilt fuel on it.
Wipe up all spillage.
• All covers and guards must be fitted before starting
the machine. Check that the spark plug cap and HT
lead are not damaged, otherwise you could get an
electric shock.
b)If you have spilt fuel on
yourself or your clothes.
Change your clothes.
• The machine operator shall ensure, while working,
that no persons or animals come closer than 15
metres. When several operators are working in the
same area the safety distance should be at least
double tree length, however, at least 15 metres.
c)If there is a fuel leak.
Make regular checks for
leakage from the fuel cap
and the fuel supply pipes.
WARNING!
Faulty cutting equipment or an incorrectly
sharpened blade increases the risk of
accidents.
!
Transport and storage
• Store and transport the machine and fuel so that any leakage
or fumes do not risk coming into contact with sparks or
naked flames. For example, electric machines, electric
motors, electrical switches/power switches, heaters or the
like.
Start
WARNING!
When the engine is started with the choke
in either the choke or start throttle positions
the cutting equipment starts to rotate
immediately.
!
• When storing and transporting fuel approved containers
intended for this purpose must be used.
• The complete clutch cover
with shaft must be fitted
before the machine is
started, otherwise the
clutch can become loose
• When storing the machine for long periods the fuel tank
must be emptied. Contact your local petrol station to find
out how to dispose of excess fuel.
and cause personal injury.
• Never start the machine
• Always keep the transport guard attached when transporting
indoors. Bear in mind the
and storing the machine.
dangers of inhaling the
engine‘s exhaust fumes.
• Observe your surroundings
and make sure that there is
no risk of people or
animals coming into
WARNING!
Exercise great care when handling fuel.
Bear in mind the risk of fire, explosions and
inhaling fumes.
!
contact with the cutting
equipment.
• Place the machine on the ground, ensure the cutting
equipment runs free of twigs and stones. Push the machine
body towards the ground using your left hand. (NOTE! Not
with your foot). Grip the starter handle with your right hand
and pull the starter cord.
English – 9
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SAFETY INSTRUCTIONS
Adjusting the harness and brush cutter
General working instructions
IMPORTANT INFORMATION
WARNING!
When working with the brush cutter the
harness should always be worn. If this is
•
•
This section takes up the basic safety
precautions for working with the brush cutter
and trimmer.
!
not done, you cannot control the brush
cutter safely and this can result in injury to
yourself or someone else. Never use a
harness with a defective quick release
catch.
If you encounter a situation where you are
uncertain how to proceed you should ask an
expert. Contact your dealer or your service
workshop.
Quick release
On the front is an easily
accessible, quick release
catch:
•
•
Avoid all usage which you consider to be beyond
your capability.
• Pull out the red strap.
• The hip strap and one
shoulder strap will be
automatically released at
the same time and the
harness and the engine
unit will slide to the
ground.
Before starting you must understand the
difference between forestry clearing, brush
cutting and grass trimming.
Basic safety precautions
1.Observe your surroundings:
Use this if the engine should
catch fire or in any other
emergency situation when
you quickly need to take off
the harness and machine.
• To ensure that people, animals or other things cannot affect
your control of the machine.
• To ensure that the above mentioned do not come into
contact with the cutting equipment or objects that can be
thrown by the cutting equipment.
Equal load on
shoulders
• NOTE! Never use a machine without the possibility of
calling for help in the event of an accident.
A well matched saw and
harness make work much
easier. Adjust the harness to
give the best working stance.
Adjust the side straps so that
the weight is equally divided
across the shoulders.
2.Avoid usage in
unfavourable weather
conditions. For example,
thick fog, heavy rain,
strong winds or extreme
cold, etc. To work in bad
weather conditions is
tiring and can create
dangerous situations, for
example, slippery surfaces.
3.Make sure you can walk
and stand safely. Look out
for any obstacles with
unexpected movement
(roots, stones, branches,
pits, ditches, etc.). Take
great care when working
on sloping ground.
4.The engine should be switched off before moving. When
moving over longer distances and transporting the transport
guard should be used.
5.Never put the machine down with the engine running
unless you have good sight of it.
10– English
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SAFETY INSTRUCTIONS
Brush cutting using a grass blade
Basic clearing techniques
• Always carry out clearing and trimming at full throttle.
• A blade is used for all types
of high or thick grass.
• Always drop to idling speed after each working operation.
Longer periods running at full throttle without loading the
engine (that is without resistance, which the engine feels
from the cutting equipment when trimming) can lead to
serious engine damage.
• The grass is cut down with
a sideways, swinging
movement, where the
movement from right-to-
left is the clearing stroke
and the movement from
left-to-right is the return
stroke. Let the blade work
on the left-hand side
(between 8 and 12
Designations
• Brush cutting is a general
term for clearing grass.
Grass blades are used for
this purpose.
o’clock).
• If the blade is angled to the
left when clearing the grass
will collect in a line, which
makes collection easier,
e.g. when raking.
• Grass trimming is a
general term for light
clearing, e.g. around
edges or around trees. A
trimmer head or plastic
blade is used.
• Try to work rhythmically. Stand firmly with your feet apart.
Move forward after the return stroke and stand firmly again.
• Let the support cup rest lightly against the ground. It is used
to protect the blade from hitting the ground.
• Reduce the risk of material wrapping around the blade by
following these instructions:
WARNING!
Sometimes grass can collect in the spray
guard and cutting head. Always stop the
engine when cleaning.
a) Always work at full throttle.
b) Avoid the previously cut material during the return
stroke.
!
• Stop the engine, loosen the harness and place the machine
on the ground before you start to collect the cut material.
WARNING!
Neither the user of the tool or anyone else
!
may attempt to remove the cut material
while the engine is running or with the blade
rotating as this can result in serious injury.
Stop the engine and blade before you
remove material that has wound around the
blade as otherwise there is a risk of injury.
The bevel gear unit can get hot during use
and may remain so for a while afterwards.
There is a risk of slight burns if you touch it.
WARNING!
Warning for thrown objects. Always wear
protective glasses. Never lean over the
!
guard. Stones, rubbish, etc. can be thrown
up into the eyes causing blindness or
serious injury.
Keep unauthorised persons at a distance.
Children, animals, onlookers and helpers
should be kept outside the safety zone of 15
m. Stop the machine immediately if anyone
approaches.
English – 11
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SAFETY INSTRUCTIONS
Trimming
Grass trimming using the trimmer head
• The trimmer is ideal to cut
grass that is difficult to
reach using a normal lawn
mower. Keep the cord
parallel to the ground when
cutting. Avoid pressing the
trimmer head against the
ground as this can ruin the
lawn and damage the tool.
• Hold the trimmer head
just above the ground at
an angle. It is the end of
the cord that carries out
the work. Let the cord
work at its own pace. Do
not press the cord into the
area to be cut.
• Do not allow the trimmer
head to constantly come
into contact with the
ground during normal
cutting procedures.
Constant contact can cause
damage and wear to the
trimmer head.
• The cord can easily
remove grass and weeds
up against walls, fences,
trees and borders,
however, it can also
damage sensitive bark on
trees and bushes and
damage fence posts.
• Reduce the risk of
damaging plants by
shortening the cord to 10-
12 cm and reducing the
engine speed.
Sweeping
• The rotating cord‘s fanning
effect can be used for quick
and easy cleaning. Hold the
cord parallel to and above
the area to be swept and
move the trimmer from
side to side.
Clearing
• The clearing technique
removes all unwanted
vegetation. Keep the
trimmer head just above
the ground and tilt it. Let
the end of the cord strike
the ground around trees,
posts, statues and the like.
NOTE! This technique
increases the wear on the
cord.
• When cutting and
sweeping you should use
full throttle to obtain the
best results.
• The cord wears quicker
and must be fed forward
more often when working
against stones, brick,
concrete, metal fences,
etc. than when coming
into contact with trees
and wooden fences.
WARNING!
Warning for thrown objects. Always wear
!
protective glasses. Never lean over the
guard. Stones, rubbish, etc. can be
thrown up into the eyes causing
blindness or serious injury.
Keep unauthorised persons at a distance.
Children, animals, onlookers and helpers
should be kept outside the safety zone of
15 m. Stop the machine immediately if
anyone approaches.
• When trimming and
clearing you should use
less than full throttle so
that the cord lasts longer
and to reduce the wear on
the trimmer head.
12– English
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WHAT IS WHAT?
15
27
14
12
6
11
8
9
24
31
23
5
2
3
1
7
13
33
18
4
19
20
20
35
25
1
29
28
26
21
30
4
34
32
What is what on the grass trimmer and the brushcutter?
1.
Blade
20.
21.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
35.
Support cup
Drive disc
2.
Grease filler cap
Angle gear
3.
J-handle
4.
Blade guard
Trimmer head
Socket spanner
Operator‘s Manual
Transport guard
Allen key
5.
Shaft
6.
Locking button for start throttle
Throttle
7.
8.
Stop switch
9.
Throttle trigger lock
Cylinder cover
Starter handle
Fuel tank
Spanner
11.
12.
13.
14.
15.
18.
19.
Locking pin
Harness
Drive axle grease
Air purge
Choke
Air filter cover
Locking nut
Support flange
Cord cutter
Guard extension
English – 13
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ASSEMBLY
Assembling the J-handle
Assembling the transport guard
1) Insert the tips of the
blade into the grooves
in the transport guard
(A).
2) Wind the guard
around the blade, then
snap the hook (B) to
secure the transport
guard.
WARNING
Only grass blades or trimmer heads/
plastic blades may be used when the J-
handle is fitted. Clearing blades must
never be used with the J-handle.
A
B
!
• Fit the handle using the 4
screws about 30 cm in
front of the throttle lever
on the shaft. See the
arrow mark on the shaft.
• Finely adjust the J-handle
to give a comfortable
working stance. Tighten
the knob.
Assembling the blade guard and
grass blade
• Fit the guard (A) to the
gear housing using the
support plate (M) and two
screws (L).
L
• Fit the drive disc (B) on
M
the output axle.
• Turn the blade axle until
one of the holes in the
drive disc aligns with the
hole in the gear housing.
A
Assembly of the blade and trimmer
head
It is extremely important
that the disc drive’s/support
flange’s guide engages
correctly in the cutting
equipment’s centre hole
when assembling the cutting
equipment. Cutting
equipment assembled
incorrectly can result in
serious and/or fatal personal
injury.
• Insert the locking pin (C)
in the hole so that the axle
is locked.
• Place the blade (D),
support cup (F) and
support flange (E) on the
output shaft.
G
E
F
• Fit the nut (G). The
tightening torque of the
nut is 35-50 Nm (3,5 - 5
kpm). Use the socket
D
spanner in the tool kit.
Hold the handle of the
spanner as close to the
blade guard as possible.
The nut is tightened when
the spanner is turned
B
Under no circumstances may the cutting
equipment be used without an approved
guard fitted. See the chapter “Technical
data”. If the wrong guard or a defective
guard is fitted this can cause serious
personal injury.
C
!
against the direction of
rotation (left-hand thread).
14– English
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ASSEMBLY
Assembling other guards and
cutting equipment
• Fit the guard (A) to the
gear housing using the
support plate (M) and two
screws (L).
Assembling the flexible shaft
1) Remove the screw and
insert the outer fitting
(with o-ring) into the
joint pipe (A), and
tighten the screw.
L
• Fit the disc drive (B) on
the output axle.
M
2) Insert the outer fitting
into the clutch case with
pulling up the pin (B).
Be sure pin returns to
original position by
spring and outer fitting
never comes off from
clutch case.
• Turn the blade axle until
one of the disc drive’s
holes aligns with the
corresponding hole in the
gear housing.
A
• Insert the locking pin (C)
into the hole to lock the
axle.
H
Connecting throttle cable and stop
switch wires
1) Insert the throttle cable
through the cable
• Screw on the trimmer
head (H) in the direction
of rotation.
adjuster sleeve on the
carburettor bracket.
Make sure the end of the
throttle cable housing is
seated positively in the
sleeve.
• Dismantling takes place in
the reverse order.
2) Position the slotted
fitting on the carburettor
so the recessed hole (A) is
away from the cable
adjuster sleeve.
3) Rotate the carburettor
throttle cam and slip the
throttle cable through
the slot in the slotted
fitting, making sure the
cable lug drops into the
recessed hole.
4) Operate the throttle
trigger a few times to
make sure that it works
correctly.
5) Plug the stop switch
wires into the matching
connectors from the
engine. Note that wire
polarity is not important.
6) Bind the throttle cable
and the flexible shaft
with two bands (B).
Assembling the spray guard
(Install the cord cutter and guard extension to the spray
guard.)
1) Fasten the cord cutter
(A) to the spray guard
with two M5 x 25
screws, lock washers
and hex nuts as
shown.
2) Attach the guard
extension (B) to the
guard with the five
M5 x 25 screws,
washers and hex nuts
as shown.
English – 15
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ASSEMBLY
Adjusting the harness and brush
Cable adjustment
• Throttle cable should be paralleled to flexible shaft. In case
of twisting, they should be restored by parallel.
• Throttle cable should be adjusted under the bended flexible
shaft as shown.
cutter
WARNING!
When working with the brush cutter the
harness should always be worn. If this is
not done, you cannot control the brush
cutter safely and this can result in injury to
yourself or someone else. Never use a
harness with a defective quick release
catch.
!
1)Loosen the lock-nut (C)
and adjust the cable
adjuster sleeve (D) so the
stop on the carburettor
throttle cam just contacts
the throttle stop and the
cable position keep 1–2
mm play between cable lug
and slotted fittings when
the throttle trigger is fully
depressed.
Quick release
On the front is an easily
accessible, quick release
catch:
• Pull out the red strap.
• The hip strap and one
shoulder strap will be
automatically released at
the same time and the
harness and the engine
unit will slide to the
ground.
1-2mm
2)When the throttle cable is
adjusted correctly, tighten
the lock-nut.
Use this if the engine should
catch fire or in any other
emergency situation when
you quickly need to take off
the harness and machine.
Equal load on
shoulders
A well matched saw and
harness make work much
easier. Adjust the harness to
give the best working stance.
Adjust the side straps so that
the weight is equally divided
across the shoulders.
16– English
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FUEL HANDLING
Mixture
Fuel
NOTE!
• Always mix petrol and oil in a clean container intended for
petrol.
The machine is fitted with a two-stroke engine and must
always be run on a mixture of petrol and two-stroke oil. It is
important to measure the quantity of oil accurately, to ensure
the correct mixture ratio. Small discrepancies in the amount of
oil have a great bearing on the proportions of the fuel mixture
when mixing small amounts of fuel.
• Always start by filling half the quantity of petrol required.
Then add the entire oil quantity. Mix (shake) the fuel
mixture. Fill the remaining quantity of petrol.
• Mix (shake) the fuel mixture carefully before filling in the
machine‘s fuel tank.
WARNING!
Always provide good ventilation when
!
handling fuel.
• Do not mix more than max. one month’s supply of fuel.
Petrol
• If the brush cutter is not used for a long period of time, the
fuel tank should be emptied and cleaned.
NOTE!
Always use an oil-mixed
quality petrol (at least 90
octane). If your machine is
equipped with a catalytic
converter, (see “technical
data”) an unleaded, oil
mixed quality petrol should
always be used. A leaded
petrol will destroy the
catalytic converter.
Fuelling
WARNING!
The following precautions reduce the risk
of fire:
!
Do not smoke or place any sources of heat
in the vicinity of the fuel. Never refuel
when the engine is running. Always stop
the engine and let it cool for a few minutes
before refuelling. Open the fuel cap slowly
when fuelling so that any over pressure is
released slowly. Tighten the fuel cap
carefully after refuelling. Always move the
machine from the fuelling place before
starting.
• The lowest recommended
octane rating is 90. If you
run the engine on a petrol
with a lower octane rating
than 90 so-called
“knocking“ can occur.
This leads to an increased
engine temperature, which
can result in a serious
• Clean around the fuel
cap. Contamination in
the tank can disrupt
operations.
engine breakdown.
• When working at
continuous high revs a
higher octane rating is
recommended.
• Ensure that the fuel is
well mixed by shaking the
container before filling
the tank.
Min. 3 m
• Always use a fuel
(10 ft)
container with an anti-
spill valve.
Two-stroke oil
• For the best results use
Husqvarna two-stroke oil,
which has been specially
produced for brush cutters
and chain saws. Mixing
ratio 1:50 (2%).
• If Husqvarna two-stroke oil is not available you can use a
high quality two-stroke oil intended for air cooled engines.
Contact your dealer when selecting an oil.
Mixing ratio: 1:25 (4%).
Gasolin
Benzin
Essence
Gasolina
Lit.
Oil • Öl
Huile • Aceite
Lit.
4% (1:25)
0,20
0,40
0,60
0,80
5
10
15
20
• Never use two-stroke oil intended for water cooled outboard
motors, so-called outboard motor oil.
• Never use oil intended of four-stroke engines.
English – 17
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START AND STOP
Cold engine
IGNITION: Set the stop
Control before starting
switch to the start position.
CHOKE: Set the choke
control in the choke posi-
tion.
AIR PURGE: Prime with
fuel by pressing the dia-
phragm repeatedly until fuel
begins to run back into the
tank through the transparent
fuel hose.
For reasons of safety follow
these recommendations!
• Check the blade to ensure
that no cracks have formed
at the bottom of the teeth
or by the centre hole. The
most common reason why
cracks are formed is that
sharp corners have been
formed at the bottom of
the teeth while sharpening
or that the blade has been
used with dull teeth.
Discard a blade if cracks
are found.
• Check that the support
flange is not cracked due
to fatigue or due to being
tightened too much.
Warm engine
Use the same starting
procedure as for the cold
engine, but do not set the
choke control in the choke
position. Set the throttle to
the start position by pressing
the throttle trigger and then
pressing the red button next
to the stop button.
Discard the support flange
if it is cracked.
• Ensure the locking nut has
not lost its captive force.
The nut lock should have
a locking force of at least
1.5 Nm. The tightening
torque of the locking nut
should be 35-50 Nm.
Stop
Stop the engine by switching
the stop switch to the stop
setting.
• Check that the guard is
not damaged or cracked.
Replace the guard if it is
exposed to impact or is
cracked.
• Check that the trimmer
head and spray guard are
not damaged or cracked.
Replace the trimmer head
or spray guard if they are
exposed to impact or are
cracked.
WARNING!
When the engine is started with the choke
in the choke or start position the cutting
equipment starts to rotate immediately.
!
Start
Press the machine body
against the ground using
your left hand (NOTE! Not
your foot). Grip the starter
handle, slowly pull out the
cord with your right hand
until you feel some resist-
ance (the starter pawls grip),
now quickly and powerfully
pull the cord.
• Never use the machine without a guard or spray guard nor
with a defective guard.
Start and stop
Reset the choke control as
soon as the engine fires and
repeat until the engine starts.
When the engine starts
quickly apply full throttle
and the start throttle will
automatically disengage.
NOTE! Do not pull the
starter cord out completely
and do not release the starter
cord from the fully extended
position. This can damage
the machine.
WARNING!
The complete clutch cover with shaft
must be fitted before the machine is
started, otherwise the clutch can become
loose and cause personal injury.
Always move the machine from the filling
area before starting. Place the machine on
a flat surface. Ensure the cutting equip-
ment cannot come into contact with any
object. Make sure no unauthorised
persons are in the working area, other-
wise there is a risk of serious personal
injury. The safety distance is 15 metres.
!
18– English
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MAINTENANCE
Carburettor
Muffler
Your Husqvarna product has been designed and manufac-
tured to specifications that reduce harmful emissions.
After your unit has been run 8-10 tanks of fuel the engine
has broken in. To ensure that your unit is at peak perform-
ance and producing the least amount of harmful emissions
after break in, have your authorized servicing dealer, who has
a revolution counter at his disposal, to adjust your carburet-
tor for optimum operating conditions.
NOTE!
Some mufflers are fitted with a catalytic converter. See “Techni-
cal data” to see whether you brush cutter is fitted with a
catalytic converter.
The muffler is designed to
dampen the noise level and
to direct the exhaust fumes
away from the user. The
exhaust fumes are hot and
can contain sparks, which
can result in fire if the
exhaust fumes are directed
towards a dry and inflamma-
ble material. Some mufflers
are equipped with a special
spark arrestor screen. If your
machine is fitted with this
type of screen it should be
cleaned regularly. This is
done using a wire brush. On
mufflers without a catalytic
converter the screen should
be cleaned weekly, or
WARNING!
The complete clutch cover with shaft
must be fitted before the machine is
started, otherwise the clutch can become
loose and cause personal injury.
!
Operation
• The carburettor governs the engine‘s speed via the throttle.
Air/fuel is mixed in the carburettor. The air/fuel mixture is
adjustable. To take advantage of the engine‘s optimal output
the adjustment must be correct.
• The setting of the carburettor means that the engine is
adapted to local conditions, for example, the climate,
altitude, petrol and the type of 2-stroke oil.
replaced if necessary. On
mufflers fitted with a
catalytic converter the screen
should be checked and
cleaned monthly. If the
screen is damaged it should
be replaced.
Idle speed
adjustment (T)
• Check that the air filter is
clean. When the idle
speed is correct, the
trimmerhead will not
rotate. If adjustment is
required, close (clockwise)
the T-screw, with the
engine running, until the
trimmerhead starts to
rotate (3 400 rpm). Open
(counterclockwise) the
screw until the
++
If the screen is frequently blocked, this can be a sign that the
function of the catalytic converter is impaired. Contact your
dealer to inspect the muffler. A blocked screen will cause the
engine to overheat resulting in damage to the cylinder and
piston. Also see under “Maintenance”.
-
NOTE! Never use a machine with a defective muffler.
trimmerhead stops. You
have reached the correct
idle speed (abt 2 600 rpm)
when the engine runs
smoothly in all positions
well below the rpm when
the trimmerhead starts to
rotate.
WARNING!
Contact your servicing dealer, if the idle
speed setting cannot be adjusted so
that the cutting attachment stops. Do
not use the machine until it has been
properly adjusted or repaired.
!
NOTE!
The machine should only be used for short periods at its
highest speed.
English – 19
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MAINTENANCE
Cooling system
To maintain as low an
operating temperature as
possible the engine is
equipped with a cooling
system.
The cooling system consists
of:
1.An air intake on the
starter unit.
Drive shaft
The flexible drive shaft is lubricated with special grease. The
shaft must be lubricated at least every 25 working hours. A
tube of drive shaft grease is supplied with every machine.
NOTE! Do not use gearbox grease on the drive shaft.
4
• Lift up the locking button
that holds the drive shaft
sleeve in the clutch cover.
3
1
2.Cooling fins on the
flywheel.
3.Cooling fins on the
cylinder
4.Cylinder cover (leads cold
air onto the cylinder).
2
• Remove the clip that
holds the throttle cable on
the drive shaft.
Clean the cooling system
using a brush at least once a
week, in difficult conditions
more often.
A dirty or blocked cooling
system leads to the engine
overheating resulting in
damage to the cylinder and
piston.
• Pull the drive shaft sleeve
out of the clutch cover.
• Remove the drive shaft
from the sleeve either by
shaking it out or pulling it
out using pliers.
• Coat the surface of the
shaft with grease from the
tube. Spread it out using a
brush or rag.
Air filter
The air filter should be
cleaned regularly removing
dust and dirt to avoid:
• carburettor malfunction
• starting problems
• reduced engine power
• unnecessary wear to
engine parts
• Slide the drive shaft back
into the sleeve. Make sure
the shaft engages correctly
by turning it and pushing
at the same time.
• abnormal fuel
consumption
Clean the filter after every
25 hours or more regularly
if operating conditions are
exceptionally dusty.
• When the shaft is
correctly installed in the
sleeve the end of the shaft
should project about 10
mm beyond the edge of
the sleeve.
Cleaning the air filter
Dismantle the air filter
cover and remove the air
filter. Wash in clean, warm
soapy water. Ensure that the
filter is dry before refitting.
An air filter used for a long
period of time can never be
cleaned completely. There-
fore it is necessary to replace
the filter from time to time
with a new filter. A dam-
aged air filter must always
be replaced.
• Rotate the shaft and push
it in at the same time.
• Install the drive shaft
sleeve in the clutch cover
so that the hole is
positioned directly
underneath the locking
button on the clutch
cover.
20– English
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MAINTENANCE
Angle gear
Filing the grass blade
The angle gear is filled with
a sufficient quantity of
grease at the factory.
WARNING!
Always stop the engine before starting
work on any part of the cutting equipment.
This continues to rotate even after the
throttle has been released. Ensure that the
cutting equipment has stopped completely
and remove the cable from the spark plug
before you start to work on it.
!
However, before using the
machine you should check
that the angle gear is filled
to 3/4 with grease. Use
Husqvarna special grease.
Normally, the grease does
not need to be changed
except when the angle gear
is repaired.
• See the cutting
equipment’s packaging
for correct filing
instructions.
• The blades are sharpened
using a single cut flat file.
Spark plug
The condition of the spark
plug is affected by:
• An incorrect carburettor
setting.
• An incorrect fuel mixture
(too much or faulty oil).
• A dirty air filter.
0,6-0,7 mm
• Sharpen all edges equally
to maintain the balance
of the blade.
These factors cause deposits
on the spark plug electrode
that may result in malfunc-
tion or starting difficulties.
WARNING!
Always discard a blade that is bent,
twisted, cracked, shattered or damaged in
any other way. Never attempt to straighten
a twisted blade for use again. Only use
original blades of the prescribed type.
!
If the machine is low on power, difficult to start or runs
poorly while idling always check the spark plug first.
If the spark plug is dirty, clean it and at the same time check
that the electrode gap is 0,6–0,7 mm. The spark plug should
be changed after about one month of operation or earlier if
necessary.
NOTE! Always use the recommended type of spark plug. An
incorrect spark plug can damage the cylinder/piston.
English – 21
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MAINTENANCE
Weekly
maintenance
Maintenance schedule
1
Below follows some general maintenance instructions.
If you need further information please contact your service
workshop.
1.Check the starter, the
starter cord and the return
spring.
Daily maintenance
2.Make sure that the
vibration damping
elements are not damaged.
2
1. Clean the outside of the
1
machine.
3.Clean the outside of the
spark plug. Remove and
check the electrode gap.
Adjust the gap to 0,6–0,7
mm (0,02–0,03 inch) or
change the spark plug.
0,6 - 0,7 mm
3
2. Make sure the harness is
not damaged.
3. Make sure the throttle
2
4
5
trigger lock and the
throttle function
correctly from a safety
4.Clean the cooling fins on
the flywheel.
6
point of view.
5.Clean or replace the
muffler’s spark arrestor
screen (not on mufflers
with a catalytic converter).
3
4. Check that the stop
switch functions.
7
6.Clean the carburettor area.
4
5. Check that the cutting
7.Clean the cooling fins on
the cylinder and check that
the air intake in the starter
unit is not blocked.
head does not rotate
while idling.
8
5
6. Clean the air filter.
Replace if necessary.
8.Check that the angle gear
is 3/4 filled with grease.
Fill if necessary using
special grease.
6
7. Check the guards for
damage and ensure that
they are not cracked.
Replace the guards if
they have been exposed
Monthly
maintenance
1
to impact or are cracked.
7
1.Clean the fuel tank using
petrol.
8. Check that the blade is
well centred, is sharp,
and is not cracked. An
2.Clean the carburettor and
the area surrounding it.
2
8
uncentred blade causes
vibrations that can result
in damage to the
machine.
3.Clean the fan and the area
around it.
3
4.Check the fuel filter and the
fuel pipe, replace if
necessary.
9
9. Check that the trimmer
head is undamaged and
not cracked. Replace the
trimmer head if
4
5.Check all cables and
connections.
10
necessary.
5
6.Check the clutch, clutch
springs and the clutch drum
with regard to wear.
10. Check that the locking
nut is tight.
Replace if necessary.
11. Check that the blade‘s
6
11
transport guard is intact
and that it can be
secured correctly.
7.Change the spark plug.
7
12
12. Check that all nuts and
screws are tightened.
22– English
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TECHNICAL DATA
142RB
152RB
Technical data
Engine
Cylinder capacity, cm3/cu. inch
Cylinder bore, mm/inch
Stroke length, mm/inch
Idling speed, rpm
41,5/2,53
40/1,57
33/1,30
2 600
50,2/3,06
44/1,73
33/1,30
2 600
10 400
8 060
1,3kW/ 6 500 rpm
No
No
No
10 400
8 060
1,5kW/ 6 500 rpm
No
No
No
Recommended max. speed, rpm
Speed of output axle, rpm
Max. engine output, acc. to ISO 8893
Catalytic converter muffler
Speed-regulated ignition system
Spark arrestor screen
Ignition system
Ikeda Denso
NGK BPMR6Y
0,6–0,7/0,02–0,03
Ikeda Denso
NGK BPMR6Y
0,6–0,7/0,02–0,03
Manufacturer/type of ignition system
Spark plug
Electrode gap, mm/inch
Fuel lubrication system
Manufacturer/type of carburettor
Fuel tank capacity, litres/US pint
Walbro WYJ
1,0/2,11
Walbro WYJ
1,0/2,11
Weight
Weight without fuel, cutting tool and guard,
kg/lbs
11,5/25,4
11,5/25,4
Noise levels
Equivalent noise pressure level at the user’s ear,
measured according to prEN 31806 and ISO
7917, dB(A), min/max:
97/98
97/98
Equivalent noise power level at the user’s ear,
measured according to prEN 31806 and ISO
10884, dB(A), min/max:
109/110
109/110
Vibration levels
Vibration levels on the handles, measured
according to prEN 31806 and ISO 7916, m/s
When idling, left/right handles, min:
When idling, left/right handles, max:
At max. speed, left/right handles, min:
At max. speed, left/right handles, max:
1,4/1,4
1,4/1,4
1,5/2,3
11,5/9,0
1,4/1,4
1,4/1,4
1,5/2,3
11,5/9,0
NOTE!
The noise and vibration measurments are made with all for the machine approved cutting equipment.
The maximum and minimum values are stated in the table above.
Type
Cutting attachment guard Art No.
Approved accessories 142RB/152RB
Centre hole in blades Ø 20 mm
Threaded blade axle M12
Multi 275-4 (Ø 275 4-teeth)
Multi 300-3 (Ø 300 3-teeth)
Trimmy S II
Trimmy H II
Superauto III
531 00 77-01
531 00 77-01
531 00 77-01
531 00 77-01
531 00 77-01
-
Grass blade/grass knife
Trimmer head
Support cup
Fixed
English – 23
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EU declaration of conformity (Only applies to Europe)
(Directive 98/37/EC, Annex II, A)
We, Husqvarna AB, S-561 82 Huskvarna, Sweden, tel. +46 36-146500, declare under sole responsibility that the
brush cutters Husqvarna 142RB/152RB from the serial numbers of 1999 and onwards (the year is clearly stated in
plain text on the type plate with subsequent serial number), is in conformity with the following standards or other
normative documents following the provisions in the COUNCIL’S DIRECTIVES:
-
-
of June 22 1998 “relating to machinery” 98/37/EC.
of May 3 1989 “relating to electromagnetic compatibility” 89/336/EC, and applicable supplements.
The following standards have been applied: EN292-2, EN11806, ISO14865, ISO14740, CISPR 12.
SMP Svensk Maskinprovning AB, Fyrisborgsgatan 3, S-754 50 Uppsala, Sweden, has carried out voluntary type
approval for Husqvarna AB. The certificate is numbered: SEC/99/670 – 142RB, SEC/99/671 – 152RB.
Huskvarna 13 August, 1999
Anders Ströby, Product manager.
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´*3$h¶6W¨
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´*3$h¶6W¨
1999W38
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|