268K/272K
Operator’s Manual
Read through the Operator’s Manual carefully and
understand the contents before you use the power
cutter.
101 87 70-27
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CONTENTS
Before using your new Power cutter
List of Contents
Symbol explanation ....................................... 2
Safety instructions
• Read the Operator’s Manual carefully.
• Check the assembly and adjustment of the cutting disc, see
chapter ”Assembly”.
• Start the engine and check the carburettor settings. See
chapter ”Maintenance”, section ”Carburettor”. When adjusted
correctly the cutting disc should not rotate when idling. Setting
the idling speed is described in the Operator’s Manual. Adjust
the speed according to these instructions. Do not use the
power cutter if the idling speed is not correctly adjusted!
• Let your Husqvarna dealer check the power cutter and carry
out essential adjustments and repairs.
Personal safety equipment ..................................... 4
The power cutter’s safety equipment ...................... 4
Control, maintenance and service of the machine‘s safety
equipment............................................................................ 5
General safety instructions ..................................... 6
Transport and storage ......................................................... 6
Fuel safety ........................................................................... 7
General working instructions................................... 7
Cutting ................................................................................. 7
Kickback .............................................................................. 8
Care and storage................................................................. 9
Cutting discs and blades ....................................... 10
Abrasive discs ................................................................... 10
Cutting discs ...................................................................... 11
Diamond discs ................................................................... 11
WARNING!
Under no circumstances may the original
design of a power cutter be modified
without the written permission of the
manufacturer. Unauthorised modifications
can result in safety be jeopardised.
!
What is what?
What is what on a power cutter? ....................................... 12
Assembly
IMPORTANT INFORMATION! A too lean carburettor
adjustment significantly increases the risk of an
engine breakdown.
Insufficient care of the air filter will cause deposits
on the spark plug resulting in abnormal wear to
engine parts.
Fitting the cutting head ...................................................... 13
Checking the drive shaft and flanges ................................ 13
Fitting the cutting disc........................................................ 13
Fuel handling
Fuel mixture....................................................................... 14
Fuelling .............................................................................. 14
Start and stop
Start and stop .................................................................... 15
Maintenance
Adjusting the drive belt ...................................................... 16
Changing the drive belt ..................................................... 16
Carburettor ........................................................................ 17
Fuel filter............................................................................ 18
Air filter .............................................................................. 18
Starter................................................................................ 19
Spark plug ......................................................................... 20
Silencer ............................................................................. 20
Cooling system .................................................................. 20
Daily maintenance ............................................................. 21
Weekly maintenance ......................................................... 21
Monthly maintenance ........................................................ 21
Technical Data
268 K ................................................................................. 22
272 K ................................................................................. 22
English – 3
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SAFETY INSTRUCTIONS
THE POWER CUTTER’S SAFETY
EQUIPMENT
WARNING! Incorrect or careless use of a
power cutter can turn it into a dangerous tool
that can cause serious or even fatal injury. It
is extremely important that you read and
understand this manual.
!
This section describes the power cutter’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
power cutter.)
PERSONAL SAFETY EQUIPMENT
WARNING! Never use a power cutter with
defective safety equipment. Follow the
control, maintenance and service instructions
WARNING! When using a power cutter, safety
equipment approved by the appropriate
authorities must be used. Personal safety
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 safety
equipment.
!
!
described in this manual.
1 Anti-vibration
system
• HELMET
• EAR PROTECTION
• PROTECTIVE GLASSES
OR FULL FACE
Your power cutter is equipped
with an anti-vibration system.
This is designed to give as low
vibration levels and
PROTECTION
comfortable usage as possible.
• BREATHING MASK
• HEAVY-DUTY, FIRM GRIP
GLOVES
The power cutter’s anti-
vibration system reduces the
transfer of vibration between
the engine/cutting equipment
and the cutting trolley. The
engine body including the
cutting equipment is
• HEAVY-DUTY,
COMFORTABLE
CLOTHING THAT ALLOWS
FULL FREEDOM OF
MOVEMENT
suspended in a handle system
via anti-vibration elements.
• LEG PROTECTION (TO
PROTECT AGAINST
SPARKS AND CUTTING
FRAGMENTS)
2 Stop switch
• ANTI-SLIP BOOTS WITH
STEEL TOE CAPS
The stop switch should be
used to stop the engine.
• FIRST AID KIT SHOULD
ALWAYS BE ON HAND
4– English
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SAFETY INSTRUCTIONS
3 Silencer
Control, maintenance and service of
the machine‘s safety equipment
WARNING! During use and for some time
after the silencer is very hot. Do not touch the
silencer if it is hot!
WARNING! All service and repairs to the
power cutter require special training. This
!
applies especially to the power cutter’s safety
!
equipment. If the power cutter does not meet
any of the controls listed below you should
contact your service workshop.
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.
The silencer is designed to
give the lowest possible noise
level and to direct the engine‘s
exhaust fumes away from the
user. The engine‘s exhaust
fumes are hot and can contain
sparks, which can lead to the
outbreak of fire.
1 Anti-vibration system
Check the anti-vibration
elements regularly for material
cracks and deformation.
In countries that have a warm
and dry climate the risk of
forest fires is obvious. We
have therefore fitted certain
silencers with a spark arrest
screen. Make sure that your
silencer is fitted with this kind
of screen.
MPORTANT INFORMATION! It is extremely important that
the instructions for checking, maintaining and servicing
the silencer are followed. (see the section “Control,
maintenance and service of the power cutter’s safety
equipment“).
Check that the anti-vibration
elements are securely
mounted between the engine
unit and the handle system.
4 Disc guard for the cutting disc
WARNING! Always check that the disc guard
is correctly fitted before starting the machine.
!
The disc guard is mounted
above the cutting disc and
prevents cutting fragments
from being thrown towards the
user.
2 Stop switch
Start the engine and make
sure that the engine stops
when the stop switch is
moved to the stop position.
English – 5
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SAFETY INSTRUCTIONS
3 Silencer
GENERAL SAFETY INSTRUCTIONS
Never use a machine that
has a defective silencer.
IMPORTANT INFORMATION!
Do not use the power cutter until you have read the
entire contents of this Operator’s Manual.
All servicing, in addition to the points listed in the
section ”Control, maintenance and service of the
power cutter’s safety equipment”, should be carried
out by trained service specialists.
• Use the equipment recommended in the chapter ”Personal
safety equipment”.
• Never use the machine when you are tired, under the
influence of medicines/drugs or alcohol.
Check regularly that the
silencer is secured to the
engine body.
• Do not lend the power cutter to anyone without providing this
Operator’s Manual. Ensure the person using the power cutter
understands the information in this Operator’s Manual.
Transport and storage
• Store the power cutter under lock and key so that it’s out of
reach for children and unauthorised persons.
• Do not store or transport the power cutter with the cutting disc
fitted.
If your silencer is fitted
with a spark arrest screen
then it should be cleaned
regularly. A blocked
screen leads to the
engine overheating with
serious damage as a
result. Never use a
silencer with a defective
spark arrest screen.
4 Disc guard for the cutting disc
Never use a defective disc
guard or a disc guard that is
not fitted correctly.
WARNING! Check that the cutting disc is
fitted correctly and does not show signs of
damage. A damaged cutting disc can cause
personal injury.
!
WARNING! Never use a power cutter with
defective safety equipment. The power
cutter’s safety equipment should be checked
!
and maintained as described in this
Operator’s Manual. If your power cutter does
not meet any of these controls you should
contact your service workshop.
6– English
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SAFETY INSTRUCTIONS
GENERAL WORKING INSTRUCTIONS
Fuel safety
This section takes up the basic safety precautions for working
with the power cutter. Follow these general working instructions,
but never use a machine without the possibility of calling for
help in the event of an accident.
(Filling/Fuel mixture/Storage)
WARNING! Exercise great care when handling
fuel. Bear in mind the risk of fire, explosions
and inhaling fumes.
!
Basic safety precautions
IMPORTANT INFORMATION! Never work with a power
cutter that is defective or incorrectly adjusted. Do not
work with a power cutter that is incomplete or where
assembly has not been carried out in a satisfactory
manner. Check that the cutting disc stops rotating when
the throttle is released. If you encounter a situation
where you are uncertain how to proceed you should ask
an expert.
• Never fill the machine while
the engine is running.
• Provide good ventilation
when filling or mixing fuel
(petrol and 2-stroke oil).
• Move the machine at least 3
m from the filling position
before starting.
Avoid all usage which you consider to be beyond your
capability.
• Never start the machine:
a) If you have spilt fuel
on it. Wipe up all
• Check that no one is in the immediate vicinity when the
machine is started or while working with the machine to
ensure that people, animals or other things cannot affect your
control of the power cutter.
spillage.
b) If you have spilt fuel
on yourself or your
clothes. Change your
clothes.
• 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 circumstances, e.g. slippery surfaces.
c) If there is a fuel leak.
Make regular checks for
leakage from the fuel
cap and the fuel supply
pipes.
• Never start to work with the power cutter before the working
area is clear and you have a firm foothold. Look out for any
obstacles with unexpected movement (roots, stones,
branches, pits, ditches, etc.). Take great care when working
on sloping ground.
• Store the power cutter 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.
• Make sure clothing and parts of the body do not come into
contact with the cutting disc when the engine is started.
• Maintain a safe distance from the cutting disc when the
engine is running.
• When storing fuel, approved containers intended for this
purpose must be used.
• The disc guard should always be fitted when the engine is
running.
• When storing the power cutter for long periods the fuel tank
must be emptied. Contact your local petrol station to find out
how to dispose of excess fuel.
Only use the machine in areas with good
ventilation. Neglect can result in serious injury
or death.
!
Cutting
WARNING! A safe distance from the power
cutter is 15 metres. You are responsible that
animals and onlookers are not in the working
area. Do not start to work with the power
cutter before the working area is clear and
you have a firm foothold.
!
• Start cutting with the engine at full throttle.
• Always hold the power cutter firmly, with both hands. Hold
the machine so that the thumb and fingers grip around the
handle.
English – 7
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SAFETY INSTRUCTIONS
Water cooling
Over exposure to vibrations can result in
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.
WARNING! Water cooling, which is only used
for petrol-driven power cutters and when
cutting concrete, cools the cutting disc and
increases its service life as well as reduce
dust formation (see the section ”Abrasive
discs”). Among the disadvantages are
difficulties at very low temperatures and the
risk of damaging the floor and other sections
of the building.
!
!
Sharpening discs
Discs can become dull when the wrong feeding pressure is
used or when cutting some materials such as heavily reinforced
concrete. To force a dull disc results in overheating and finally
the loss of segments (part of the disc).
Cutting technique
The technique described below is of a general character. Check
information for each disc regarding individual cutting characte-
ristics. (For example, a diamond disc requires less feeding
pressure than a abrasive disc).
Sharpen against a soft material such as sandstone, silica or
haydite brick.
1.Support the work piece in
such away that you can
predict what will happen
and so it will not pinch.
Disc vibration
The disc can become out of shape (not round) and vibrate if a
too high feeding pressure is used or if the disc is pressed into
the work piece.
2.Always cut at full throttle.
A lower feeding pressure ought to stop the vibration. Otherwise
replace the cutting disc.
3.Start cutting gently, do
not force or squeeze the
disc in.
Kickback
4.Use a high disc speed.
Kickback can occur very suddenly and with great force. If the
following directives are not followed, it can result in serious or
even fatal injury.
5.Move the disc slowly
backwards and forwards.
6.Use a small part of the
disc’s cutting edge.
If the sector of the disc illustrated below is used for cutting the
disc can start to climbing and kickback the power cutter
upwards and backwards towards the user with immense force.
7.Only use the disc’s
cutting edge when
cutting.
How to avoid kickback
1.Never cut with the
segment illustrated in the
diagram.
8.Cut with the disc fully
vertical – at right angles
to the work piece.
2.Keep a good balance and
a firm foothold.
3.Use both hands and take
a firm grip with the thumb
and fingers around the
handle.
4.Keep the work piece at a
comfortable distance.
5.Use the cutter at full
throttle.
WARNING!
6.Take care when inserting
the disc in an existing cut.
Under all circumstances avoid cutting using
the side of the disc; it will almost certainly be
!
damaged, break and can cause immense
damage. Only use the cutting section.
7.Never cut above shoulder
height.
8.Be alert to movement of
the work piece or anything
else that can occur, which
could cause the cut to
WARNING!
Do not lean the disc to the side, this can
cause the disc to jam or break with personal
injury as a consequence.
close and pinch the disc.
!
8– English
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SAFETY INSTRUCTIONS
Pull in
Care and storage
Pull in occurs when the lower part of the disc is suddenly
stopped or when the cut closes. (To avoid this see the section
”How to avoid kickback” and ”Pinching/rotation” below).
General
Husqvarna’s power cutters are robust and durable. However, as
they are used for high speed operations all servicing should be
carried out on time and as specified, so that the power cutter
always works effectively and safely.
Pinching/rotation
Pinching occurs when the cut closes. The power cutter can be
drawn suddenly and powerfully downwards.
Read this Operator’s Manual to determine which service
routines you can carry out and ensure that all other service
work is carried out by an authorised service workshop.
How to avoid pinching
Support the work piece in
such a way that the cut
remains open during the
cutting operation and when
the cut is finished.
Power Cutter
Always handle the power cutter with care and store it with the
disc removed.
Drying the disc
Discs
After using the disc with
water cooling, let the cutter
run for approx. half a minute
so that the disc dries.
• All discs should be
removed from the cutter
after use and stored
carefully.
If a damp disc is stored it can
become unbalance and
cause damage.
• Special care should be
taken with abrasive discs.
• Discs must be stored on a
firm, level surface. If discs
are supplied with a
backing pad then a spacer
should be used to keep
them flat.
Check the speed of the
drive shaft
Use a tachometer regularly to
check the speed of the drive
shaft when the cutter is
running at working tempera-
ture and at full throttle without
a load. The maximum speed
is stated on the unit.
• Avoid moisture and
temperature extremes.
• Remove the discs before
the cutter is moved or
transported.
• Inspect new discs for
transport or storage
damage.
WARNING!
If the speed is higher than that stated then the
unit must be adjusted by an authorised
service workshop before it is used.
!
English – 9
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SAFETY INSTRUCTIONS
Abrasive discs
CUTTING DISCS AND BLADES
The cutting material in an abrasive disc consists of abrasive
corn that is held together by an organic bonding agent.
”Reinforced discs” are made up of a fabric or fibre base that
prevents total breakage at maximum working speed if the disc
should be cracked or damaged. (The term reinforced does not
refer to those cutting discs that are only reinforced around the
flange).
A cutting disc’s performance is determined by the type and size
of abrasive corn, and the type and hardness of the bonding
agent.
Characteristics that give the disc a shorter service life and
greater cutting capacity are said to make the disc ”softer”. A
disc with a longer service life and slower cutting capacity is a
disc with a ”harder” effect.
High quality cutting discs are normally more economical. Lower
quality cutting discs usually have an inferior cutting capacity and
shorter service life, which results in higher cost per processed
material.
General
Cutting discs and discs are available in two standard designs;
abrasive discs and diamond discs.
ABRASIVE DISCS TYPES AND USES
Use
High speed portable tools
Cutting discs of the make Husqvarna are manufactured for
portable, high speed, power cutters. If other makes of cutting
discs are used, ensure the discs comply with all the directives
and requirements attributed to the specific type of power cutter.
General
characteristics
Material
Water cooling
Disc
type
Universal
usage,
economical
Concrete,
asphalt,
stone,
brickwork,
cast iron,
aluminium,
copper,
Increases the
disc’s service
life. Reduces
dust formation.
Recommended.
Con-
crete
WARNING!
Never exceed the maximum working speed of
a cutting disc.
!
brass, cables,
rubber, etc.
Special discs
Some cutting discs are designed for stationary equipment and
for use with attachments, for example, rail cutting equipment.
These types of cutting discs must not be used on portable,
power cutters.
Unbeatable for
steel (not
suitable for
Steel, steel
alloys and
other hard
metals.
Reduces cutting
capacity NOT
recommended.
Metal
concrete, etc.)
WARNING!
Never use a cutting disc for any other purpose
than that it was intended for.
!
Always contact local authorities and make sure you are
following applicable directives.
10– English
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SAFETY INSTRUCTIONS
Guard
Cutting discs
Check that the guard is not
crack or shows signs of any
other damage. Clean the
inside of the guard before
fitting a new disc. Check that
the guard can be adjusted and
locked.
Type of cutting discs
Check that the disc is
approved for high speed,
portable power cutters. Do not
exceed the maximum working
speed stated on the disc.
100 m/s
6300 rpm
Diamond discs
Damage
• Ensure the disc it not
cracked or damaged in any
other way.
Diamond discs are basically made in the same way as abrasive
discs but are manufactured from industrial diamonds held
together by a bonding agent.
• Test the disc by hitting it
gently with a piece of wood.
If the disc does not give a
full-sounding ring then it is
damaged.
DIAMOND DISCS TYPES AND USES
Diamond
disc
Water cooling
General char-
acteristics
Material
Increases the
disc’s service
life.
Low cost per
cutting opera-
tion. Less disc
changes.
All brickwork,
reinforced
concrete and
other
• Never use a disc that has
fallen on the floor.
Constant cutting composite
Assembly
• Check that the disc is fitted
correctly and is secure.
depth. Less
dust.
materials.
NOT
recommended
for metal.
• Follow all specifications in
the table below.
WARNING!
Cool a diamond disc continually with water to
prevent overheating, which can cause the disc
to break and pieces being thrown off resulting
in injury and damage.
!
Specifications for fitting discs
inches
mm
Standard discs
centre hole
(spindle)
.787 7/8
1
Using diamond discs
20 22,2 25,4
Proceed as follows:
• Let the disc rotate in the same direction as the arrow
indicates.
Disc thickness
3 mm (1/8")
Max. thickness
Min thickness
Reducing bush*
• Cool continually with water.
Highly compressible,
e.g. blotting paper
Material
Backing pad
(Must be used)
• Keep the disc sharp.
0,5 mm (.020")
0,2 mm (.010")
Max. thickness
Play
• Remove the disc when transporting the cutter.
Spindle hole/
drive shaft
Avoid:
• Running the disc in the wrong direction.
The disc does not slip, flange not bent
Flange tightening
Disc/guard
• Forcing a dull disc or wedging the disc into a cut.
• Transporting the cutter with the disc fitted.
• Letting the disc fall on the work piece.
Check that the disc runs free of the
guard.
* Plastic reducing bushes may only be used with abrasive discs.
Do not use reducing bushes with diamond discs or tungsten
carbide tipped blades. We recommend that the spindle is
replaced so that it fits the discs to be used rather than using a
reducing bush. Contact your service workshop for details.
Dry diamond discs
Dry diamond discs are a new generation of discs that do not
require water cooling. However, the discs are still damaged by
excessive heat. It is good economics to let the disc cool by
simply lifting the disc from the cut every 30–60 seconds and let
it cool for 10 seconds.
English – 11
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WHAT IS WHAT?
21
13
15
2
6
17
13
23
7
24
22
3
20
8
4
10
9
1
16
18
19
5
11
12
14
What is what on a power cutter?
1. Cutting trolley
2. Upper guide section
3. Locking lever for upper guide section
4. Fuel tank
13. Throttle
14. Combination spanner
15. Air filter cover
16. Disc guard
5. Splash guard
17. Starter handle
18. Support wheel
19. Operator’s Manual
6. Choke
7. Throttle catch
8. Stop switch
20. Adjustment lever for the disc guard
21 Front handle
9. Cutting head
10. Cutting arm
22. Starter
11. Belt tensioning screw
12. Cutting disc
23 Throttle catch
24 Decompression valve
12– English
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ASSEMBLY
Fitting the cutting head
Fitting the cutting disc
Husqvarna cutting discs are
manufactured and approved
for freehand cutting. The
paper labels on each side of
the disc are there to distribute
the pressure from the flange
washer and prevent the disc
from slipping.
Undo both nuts (1) on the
cutting arm and the bolts (2).
Remove the cutting arm and fit
the drive belt on the clutch
drum. Replace the cutting arm
in position. Tighten the nuts
and bolts.
The disc is placed between
the flange hub (A) and the
flange washer (B). The flange
washer is turned so that it fits
in the flange hub. The cutting
disc is tightened using the
socket spanner 501 69 17-02.
1
2
A
B
The shaft can be locked using
a screwdriver, steel pin or the
like. This is slid in as far as
possible. The disc is tightened
clockwise.
Thread the drive belt over the
cutting head’s pulley and fit
the cutting head together with
the belt guard. Tighten the
nuts by hand.
Disc guard
The disc guard should
always be fitted on the
power cutter.
Screw in the tensioning screw
(3) so that the square nut is
located above the arrow on
the belt guard. This
automatically sets the correct
belt tension. Tighten both nuts
(4) using the socket spanner.
New drive belts should be
retensioned after using one or
two tanks of fuel.
The guard should be adjusted
so that the rear section is
close to the work piece.
Cutting fragments and sparks
are then collected by the
guard and led away from the
user. By using the lever (A)
the guard can be loosened
and set in the required
position.
3
4
A
Checking the drive shaft and flanges
• Check that the threads on
the drive shaft are
undamaged.
• Check that the contact
surfaces of the cutting disc
and flanges are flat, run
correctly on the spindle and
are free from foreign
objects.
WARNING!
16 inch disc guards should only be used on
power cutters originally equipped with a 16"
disc guard. If a disc guard is fitted as a spare
part on a power cutter originally equipped
with a 12" or 14" disc guard, the 16" cutting
disc will rotate too quickly. A cutting disc with
too high speed can burst or cause serious
injury and damage.
!
Do not use flanges that are
twisted, have damaged
edges, untrue or dirty. Do
not use different size
flanges.
English – 13
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FUEL HANDLING
Fuel mixture
Fuelling
WARNING! the power cutter is fitted with a
WARNING!The following precautions reduce
the risk of fire:
two-stroke engine and must always be run on
a mixture of petrol and two-stroke oil. To
ensure the correct mixture proportions it is
important to measure the quantity of oil
accurately. When mixing small amounts of
fuel small discrepancies in the amount of oil
has a great bearing on the proportions of the
fuel mixture. Always provide good ventilation
when handling fuel.
!
!
• Do not smoke or place any sources of heat in the
vicinity of the fuel.
• Never refuel when the engine is running.
• 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.
Petrol
• Use unleaded or quality
leaded petrol.
• Keep the handle dry, clean
and free from oil and fuel.
• 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 engine
breakdown.
• Clean around the fuel cap.
Clean the fuel tank
regularly. The fuel filter
should be changed at least
once per year
Contamination in the tank
can disrupt operations.
Ensure that the fuel is well
mixed by shaking the
container before filling the
tank.
Two-stroke oil
• For the best results use
HUSQVARNA two-stroke
oil, which has been
specially produced for
power cutters. 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: 1:33
(3%) - 1:25 (4%).
Gasolin
Benzin
Essence
Gasolina
Lit.
Oil • Öl
Huile • Aceite
Lit.
2%(1:50) 3%(1:33) 4%(1:25)
0,10
0,20
0,30
0,40
0,15
0,30
0,45
0,60
US
fl. oz.
0,20
0,40
0,60
0,80
5
10
15
20
US
gallon
• Always exercise care when
filling the fuel. Move the
power cutter at least three
metres from the filling area
before starting. Make sure
the fuel cap is tightened.
2%(1:50) 3%(1:33) 4%(1:25)
2 1/2
6 1/2
12 7/8
3 3/4
9 3/4
19 1/4
5 1/8
12 7/8
25 3/4
1
2 1/2
5
• Never use two-stroke oil intended for water cooled outboard
motors, so-called outboard motor oil.
• Never use oil intended of four-stroke engines.
Mixture
• Always mix petrol and oil in
a clean container intended
for petrol.
• 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.
• Do not mix fuel for more
than approx. 2 months use.
• If the clearing saw is not
used for a long period of
time, the fuel tank should be
emptied and cleaned.
14– English
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START AND STOP
Start
Start and stop
WARNING! Before starting observe the
following:
WARNING! The cutting disc can rotate when
the engine starts. Make sure it can rotate
freely.
!
!
• Do not start the power cut without the cutting arm or
cutting head fitted. Otherwise the clutch can come
loose and cause personal injury.
• Always move the power cutter from the filling area
before starting.
Take hold of the front handle
using your left hand. Place
your right foot on the lower
section of the rear handle and
press the power cutter against
the ground.
• Ensure that you and the machine stand firmly and that
the cutting discs rotates freely.
• Make sure no unauthorised persons are within the
working area.
Grip the starter with your right
hand, and slowly pull the
starter cord out until you feel
some resistance (the pawls
grip) now pull quickly and
powerfully.
Starting a cold engine
IGNITION:
Slide the stop switch to the
left.
NOTE! Do not pull out the
starter cord completely and do
not release the starter from
the fully extended position.
This can damage the power
cutter.
CHOKE:
Pull out the choke.
Press in the choke as soon as
the engine fires and repeat
until the engine starts.
DECOMPRESSION VALVE
(272K)
Press in the value to reduce
the pressure in the cylinder,
this makes starting the power
cutter easier. The
When the engine starts,
quickly apply full throttle and
the start throttle will
decompression valve should
always be used when starting.
When the machine has
started the value automatically
returns to its original position.
automatically disengage.
C
START THROTTLE
Press down the catch for
unintentional throttle (A).
Apply full throttle using the
throttle (B). Press the start
throttle catch backwards (C).
Stop
A
The engine is stopped by
switching off the ignition.
(Slide the stop switch to the
right.)
B
Starting a warm
engine
Follow the same procedure as
for a cold engine but do not
pull out the choke.
English – 15
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MAINTENANCE
Adjusting the drive belt
• The drive belt is fully
enclosed and well protected
from dust, dirt and
A
mechanical effects during
the cutting process.
• To tension the drive belt,
slightly loosen the nuts (A),
which secure the cutting
head and belt guard.
• Turn the tensioning screw
so that the nut (B) is located
directly under the arrow on
the cover. Shake the head
to ensure the spring can
tension the belt. The belt
now automatically has the
right tension.
B
• Tighten the nuts that hold
the cutting head.
B
IMPORTANT INFORMATION! A new drive belt should be
tensioned after using one or two tanks of fuel.
Changing the drive belt
• Loosen the two nuts (A).
• Turn the tensioning screws
(B) until the tension has
been released.
A
• Remove the two nuts (A).
• Remove the front belt cover
(C).
• Remove the belt from the
pulley.
C
B
• Dismantle the cutting head.
• Remove the two nuts (D),
and the screws that are
straight under these (E) and
lift off the cutting arm.
• Replace the drive belt.
• To assemble reverse the
procedure for dismantling.
• Check the cutting disc’s
disc guard for signs of
cracking or other damage.
Replace it if damaged.
E
D
WARNING! Never use a power cutter without
a disc guard over the cutting disc.
!
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MAINTENANCE
Fine tuning
Carburettor
• When the machine has been run-in the carburettor is finely
tuned. Fine tuning should be carried out by trained
personnel. The L-needle is adjusted first, then the idling
screw T and finally the H-needle. The following speed
recommendations apply:
Operation, Basic settings, Fine tuning
WARNING! The power cutter must be correctly
assembled with cutting arm and cutting head
Max. speed Idling speed
10,000 rpm 2,500 rpm
before you start (See chapter ”Assembly”.)
!
Conditions
Operation
• The air filter should be clean and the cylinder cover fitted
when all adjustments are made. If the carburettor is adjusted
with a dirty air filter a too lean fuel mixture is obtained the
next time the air filter is cleaned. This can result in serious
damage to the engine.
• 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.
• Carefully screw (clockwise) the L and H needles until they
bottom. Then screw out (anti-clockwise) the needles one turn.
The carburettor now has the setting H = 1 and L = 1.
T
• Start the power cutter as set out in the start instructions (see
section ”Start and stop”) and run the cutter warm for 10
minutes. NOTE! If the cutting disc rotates while the engine
is idling the T-screw should be turned anti-clockwise
until the cutting disc stops.
• The carburettor is equipped
with three adjustment
possibilities:
L = Low speed needle
H = High speed needle
T = Idle speed adjuster
screw
Low speed needle L
+ 1/4
• Find the highest idling
speed by slowly screwing
the low speed needle
clockwise respective anti-
clockwise. When the
highest speed is found,
screw the L-needle 1/4 turn
anti-clockwise. NOTE! If the
• The fuel quantity in relation to the air flow permitted by the
throttle opening is adjusted using the L and H-needles.
Turning the needles clockwise gives a leaner fuel mixture
(less fuel) and turning them anti-clockwise gives a richer fuel
mixture (more fuel). A leaner mixture gives high revs while a
richer mixture give less revs.
L
cutting disc rotates while the
engine is idling the T-screw
should be turned anti-
clockwise until the cutting
disc stops.
• The T-screw regulates the position of the throttle while the
engine is idling. Turning the screw clockwise gives a higher
idling speed while turning it anti-clockwise gives a lower idling
speed.
Fine tuning idling T
Basic setting
Idling is set using the screw marked T. If adjustment is
necessary screw in (clockwise) the idling screw T with the
engine running until the cutting disc starts to rotate. Thereafter
open (anti-clockwise) until the disc stops rotating. The correct
idling speed is set when the engine runs smoothly in all
positions with a good margin to the speed when the disc starts
to rotate.
The carburettor is set to its basic setting when test run at the
factory.
The basic setting is H = 3/4 turn respective L = 1 turn.
The carburettor should be set for a richer fuel mixture
during the first 3–4 hours of use so that the engine parts
are given good initial lubrication (running-in). To set this,
adjust the maximum speed to 6-700 rpm under the
recommended maximum speed.
WARNING! If the idling speed cannot be
adjusted so that the disc stops, contact your
service workshop. Do not use the machine
until it has been correctly adjusted or repai-
red.
If you do not have the possibility of checking the maximum
speed with a tachometer, the H-needle must not be set for a
leaner mixture than stated for the basic settings.
The recommended maximum speed must not be exceeded.
NOTE! If the cutting disc rotates while the engine is idling the T-
screw should be turned anti-clockwise until the cutting disc
stops.
!
English – 17
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MAINTENANCE
High speed needle H
• The carburettor is equipped
with an automatic speed
governor, which prevents a
too high peripheral speed
on the cutting disc. At full
throttle with a unloaded
cutting disc distinctive
variations in speed can be
heard. This is usual and is
only a sign that the speed
governor is working.
Fuel filter
• The fuel filter sits inside the fuel tank.
• The fuel tank must be protected from contamination when
filling. This reduces the risk of operating disturbances caused
by blockage of the fuel filter.
• The filter cannot be cleaned but must be replaced with a new
filter when it blocked. The filter should be changed at least
once per year.
H
• The high speed needle H
affects the power cutter’s
output and should be set
according to the
recommended basic setting,
H = 3/4 turn open.
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
2
1
• If adjustment is necessary proceed as follows:
Screw the H-needle inwards to the limit position where the
engine starts to hesitate with acceleration. Use short, fast
acceleration from idling. From this position the H-needle is
opened 1/4 turn (90°), which gives the carburettor setting for
max. engine output.
• Abnormal fuel consumption
A
• Check using a tachometer that the stated maximum speed
10,000 rpm is not exceeded.
The air filter system consists
of a pre-filter and a main filter:
NOTE! A high speed needle set too lean (H-needle screwed in
too far)) reduces the power cutter’s output and causes
overheating resulting in engine damage. The high speed
needle H should be set for the highest output and not the
highest speed.
1)The pre-filter is an oiled
foam filter that is easily
accessible under the filter
cover (A). When used in
dusty conditions, this filter
should be checked/replaced
after every second tank of
fuel. The filter must be
NOTE! Too obtain the optimal setting a technician with access
to a tachometer should be contacted. The recommended
maximum speed should not be exceeded.
cleaned and oiled regularly
to obtain a satisfactory
filtering effect. There is a
special HUSQVARNA oil
produced for this purpose
(reference number 503 47
73-01). The bottle contains
sufficient oil (0.1 l) for oiling
the filter three times.
Correctly adjusted carburettor
A correctly adjusted carburettor means that the machine
accelerates without hesitation and that the engine gurgles a
little at full throttle. In addition the cutting disc should not rotate
when idling. An L-needle set too lean can give starting
difficulties and inferior acceleration. An H-needle set too lean
gives lower engine output = ”less power”, inferior acceleration
and/or engine damage. A too rich setting of either the L or H
needles gives acceleration difficulties or a too low working
speed.
• Remove the filter. Wash the
filter carefully in tepid,
soapy water. After cleaning
rinse the filter thoroughly in
clean water. Squeeze out
the filter and let the filter
dry.
B
NOTE! Compressed air at a
high pressure can damage
the foam.
• Oil the filter carefully. It is
extremely important that the
entire filter is saturated in
oil.
2) The main filter is a paper filter and is accessible from under
cover B. This filter should be changed/cleaned when the
engine’s output drops or after 1-2 weeks. The filter is
cleaned by shaking or carefully using compressed air. Note
the filter must not be washed!
A filter used for a long period of time can never be completely
cleaned. Therefore all air filters must be replaced periodically
with a new filter. A damaged air filter must always be
replaced.
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MAINTENANCE
Tensioning the recoil spring
Starter
WARNING!
• Lift up the starter cord from
the cut out on the pulley and
turn the pulley approx. 2
turns clockwise.
• The recoil spring sits in its tensioned posi-
tion in the starter housing and can with
careless handling fly out and cause personal
injury.
!
• When replacing the recoil spring or the
starter cord great care should be exercised.
Always wear protective glasses.
NOTE! Ensure the starter
pulley can be turned at least
a further 1/2 turn when the
starter cord is fully
extended.
Replacing a broken or worn starter cord
Replacing a broken recoil spring
• Loosen the bolts that hold
the starter against the
crankcase and lift off the
starter unit.
• Lift up the starter pulley
(see section ”Replacing a
broken or worn starter
cord”). Bear in mind the
recoil spring is under
tension in the starter
housing.
• Dismantle the recoil spring
by, with the inside of the
starter facing downwards,
gently knocking it against
the bench. If the spring flies
out when fitting, it is wound
from the outside towards
the centre.
• Pull out the cord approx. 30
cm and lift it out of the cut-
out in the starter-pulley’s
periphery. Reset the recoil
spring by allowing the pulley
to slowly rotate backwards.
• Lubricate the recoil spring
with a thin layer of oil. Fit
the starter pulley and
tension the recoil spring.
• Loosen the screw in the
centre of the starter-pulley
and lift off the pulley. Insert
and secure the starter cord
in the starter pulley. Wind
on approx. 3 turns of the
cord on the pulley. Fit the
pulley on the recoil spring
so that the end of the recoil
spring hooks on the pulley.
Fit the screw in the centre of
the pulley. Thread the
Fitting the starter
• Fit the starter by first pulling
out the starter cord and then
placing the starter in
position on the crankcase.
No slowly release the
starter cord so that the
pawls grip in the pulley.
starter cord through the hole
in the starter housing and
the starter handle. Tie a
good knot on the end of the
cord.
• Fit and tighten the screws
that hold the starter.
English – 19
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MAINTENANCE
Spark plug
Cooling system
To maintain as low an operating temperature as possible the
power cutter is equipped with a cooling system.
The condition of the spark plug
is affected by:
• An incorrect carburettor
setting.
• An incorrect fuel mixture
(too much oil).
The cooling system consists of:
1. An air intake on the
starter unit.
0,5 mm
• A dirty air filter.
5
2. Air flow guide.
These factors cause deposits
on the spark plug electrode
that may result in malfunction
or starting difficulties.
3. Cooling fins on the
flywheel.
4
4. Cooling fins on the
cylinder
3
• 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 0.5 mm.
The spark plug should be
changed after about one
month of operation or earlier
if necessary.
5. Cylinder cover (leads cold
air onto the cylinder).
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.
2
1
NOTE! Always use the recommended type of spark plug. (see
chapter ”Technical data”)! An incorrect spark plug can damage
the cylinder/piston.
Silencer
The silencer 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 or
inflammable material. Some
silencers are fitted with a
special spark arrest screen.
If your power cutter is fitted
with this type of silencer then
the screen should be cleaned
at least once a week. This is
done using a wire brush.
NOTE! If the screen is
damaged in anyway it should
be replaced. If the screen is
blocked this will result in the
engine overheating and
damage to the cylinder and
piston. Never use a power
cutter with a defective
silencer.
20– English
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MAINTENANCE
2
11
9
15
17
4
1
20
6
5
12
18 19
Below follows some general maintenance instructions.
If you need further information please contact your service
workshop.
2
14
13
Daily maintenance
9
1. Check that throttle components work correctly from a safety
view point (throttle and starter throttle catch).
2. Clean the pre-filter.
3. Check the tension of the drive belt.
4. Check the condition of the cutting disc.
5. Check the condition of the disc guard.
7
10
16
3
4
6. Check the starter and the starter cord; clean the outside of
the starter’s air intake.
7. Check that all nuts and bolts are tightened correctly.
8. Check that the short-circuiting contact functions.
Monthly maintenance
16. Check the clutch drum, drive-pulley, and clutch springs with
regard to wear.
Weekly maintenance
9. Check the main filter.
17. Clean the outside of the carburettor
18. Check the fuel filter, fuel hose, change if necessary.
19. Clean the inside of the fuel tank.
10. Check that the anti-vibration elements are not damaged.
11. Clean the spark plug. Check that the electrode gap is 0.5
mm.
12. Clean the cooling fins on the flywheel. Check the starter
and recoil spring.
20. Check all cables and connections.
13. Clean the cooling fins on the cylinder.
14. Check the silencer. Clean or change the silencer’s spark
arrest screen.
15. Clean the carburettor.
English – 21
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TECHNICAL DATA
268K
272K
Engine
Cylinder volume, cu.in/cm3
Cylinder bore, inch/mm
Stroke, inch/mm
67
50
34
72,2
52
34
Idle speed, rpm
2.500
2.500
Recommended max.
speed, unloaded, rpm
Power, kW
10.000
3,2/9 000
10.000
3,8/9 300
Ignition system
Manufacture
Type of ignition system
Spark plug
Electrolux
ET
NGK,
Electrolux
ET
NGK,
BPMR 7A
0,5
BPMR 7A
0,5
Electrode gap, inch/mm
Fuel and lubrication system
Manufacturer
Carburettor type
Tillotson
HS 225
0,75
Tillotson
HS 225
0,75
Fuel capacity, US pint/litre
Weight
Without fuel and cutting disc,
Lbs/kg
12" (∅ 300 mm)
14" (∅ 300 mm)
9,5 kg
-
9,6 kg
10,1 kg
Sound levels
Equivalent (see note 1) sound
pressure level at the user’s ear,
measured according to prEN
1454 and ISO/DIS 11201, dB(A). 98
Equivalent (see note 1) sound
power level, measured according
to prEN 1454 and ISO 3744
99,5
107
dB(A).
106
Vibration levels
Handle vibrations measured
according to prEN 1454 and ISO
5349.
Front handle, idling, m/s2
Front handle, full speed, m/s2
Rear handle, idling, m/s2
Rear handle, full speed, m/s2
5,7
4,6
8,4
13,8
5,5
7,6
8,8
11,5
Note 1. Equivalent sound level is calculated as the time
weighted energy total for sound levels under different operating
conditions during the following time divisions 1/2 idling, 1/2 full
speed.
Cutting equipment
Cutting disc
Gear ratio
Max. peripherical
speed
80 m/s
100m/s
12"
14"
1:1,97
1:1,97
´*2m"¶7ߨ
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1998W17
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