Husqvarna Brush Cutter 525RK User Manual

Operators manual  
525RX 525RXT 525RK  
Please read the operator’s manual carefully and make sure you understand the instructions  
before using the machine.  
English  
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CONTENTS  
Contents  
KEY TO SYMBOLS  
Note the following before starting:  
Please read the operator's manual carefully.  
Symbols ................................................................  
CONTENTS  
WARNING! Long-term exposure to noise  
can result in permanent hearing  
impairment. So always use approved  
hearing protection.  
!
!
Contents ...............................................................  
Note the following before starting: ........................  
INTRODUCTION  
Dear Customer, ....................................................  
WHAT IS WHAT?  
5
WARNING! Under no circumstances may  
the design of the machine be modified  
without the permission of the  
manufacturer. Always use original  
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 brush cutter? ........................  
GENERAL SAFETY PRECAUTIONS  
Important ..............................................................  
Personal protective equipment .............................  
Machines safety equipment .................................  
Cutting equipment ................................................ 10  
ASSEMBLY  
WARNING! A clearing saw, brushcutter  
or trimmer can be dangerous if used  
incorrectly or carelessly, and can cause  
serious or fatal injury to the operator or  
others. It is extremely important that you  
read and understand the contents of this  
operator’s manual.  
Fitting the handlebar ............................................. 12  
Assembling and dismantling the two-piece shaft . 12  
Assembling the cutting equipment ....................... 13  
Fitting a blade guard, grass blade and grass cutter 13  
Fitting the blade guard and saw blade .................. 14  
Fitting other guards and cutting attachments ....... 14  
Adjusting the harness and brush cutter ................ 15  
Standard harness ................................................. 15  
FUEL HANDLING  
!
Fuel safety ............................................................ 16  
Fuel ...................................................................... 16  
Fueling .................................................................. 17  
STARTING AND STOPPING  
Check before starting ........................................... 18  
Starting and stopping ........................................... 18  
WORKING TECHNIQUES  
General working instructions ................................ 20  
MAINTENANCE  
Carburettor ........................................................... 25  
Muffler .................................................................. 25  
Cooling system ..................................................... 26  
Spark plug ............................................................ 26  
Air filter ................................................................. 27  
Maintenance schedule ......................................... 28  
TECHNICAL DATA  
Technical data ...................................................... 29  
EC Declaration of Conformity ............................... 30  
English 3  
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INTRODUCTION  
Dear Customer,  
Congratulations on your choice to buy a Husqvarna product! Husqvarna is based on a tradition that dates back to 1689,  
when the Swedish King Karl XI ordered the construction of a factory on the banks of the Husqvarna River, for production  
of muskets. The location was logical, since water power was harnessed from the Huskvarna River to create the water-  
powered plant. During the more than 300 years in existence, the Husqvarna factory has produced a lot of different  
products, from wood stoves to modern kitchen appliances, sewing machines, bicycles, motorcycles etc. In 1956, the first  
motor driven lawn mowers appeared, followed by chain saws in 1959, and it is within this area Husqvarna is working  
today.  
Today Husqvarna is one of the leading manufacturers in the world of forest and garden products, with quality as our  
highest priority. The business concept is to develop, manufacture and market motor-driven products for forestry and  
gardening, as well as for the building and construction industry. Husqvarnas aim is also to be at the front edge for  
ergonomics, usability, security and environmental protection.That is the reason why we have developed many different  
features to add to our products within these areas.  
We are convinced that you will appreciate with great satisfaction the quality and performance of our product for a very  
long time to come. The purchase of one of our products gives you access to professional help with repairs and service  
whenever this may be necessary. If the retailer who sells your machine is not one of our authorised dealers, ask for the  
address of your nearest service workshop.  
It is our wish that you will be satisfied with your product and that it will be your companion for a long time. Think of this  
operators manual as a valuable document. By following its content (usage, service, maintenance, etc), the life span and  
the second-hand value of the machine can be extended. If you sell this machine, make sure that the operators manual  
is passed on to the buyer.  
Thank you for using a Husqvarna product.  
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.  
4 – English  
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WHAT IS WHAT?  
3
RX  
2
29  
8
10  
1
7
9
28  
RK  
17  
4
30  
18  
5
19  
22  
10  
20  
31  
11  
14  
1
6
15  
16  
12  
21  
4
13  
24  
23  
32  
27  
25  
26  
What is what on the brush cutter?  
1
2
3
4
5
6
7
8
9
Blade  
17 Handle adjustment  
18 Locking nut  
Grease filler cap, bevel gear  
Bevel gear  
19 Support flange  
20 Support cup  
21 Drive disc  
Cutting attachment guard  
Shaft  
Handlebar  
22 Trimmer head  
23 Socket spanner  
24 Operators manual  
25 Transport guard  
26 Locking pin  
Throttle trigger  
Stop switch  
Throttle lockout  
10 Suspension ring  
11 Cylinder cover  
12 Starter handle  
13 Fuel tank  
27 Harness  
28 Shaft coupling (525RK)  
29 Start throttle button  
14 Choke control  
15 Air purge  
30 Adjusting the throttle wire  
31 Spark plug cap and spark plug  
32 Allen key  
16 Air filter cover  
English – 5  
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GENERAL SAFETY PRECAUTIONS  
Important  
WARNING! Never allow children to use or  
be in the vicinity of the machine. As the  
machine is equipped with a spring-  
loaded stop switch and can be started by  
low speed and force on the starter  
handle, even small children under some  
circumstances can produce the force  
necessary to start the machine.This can  
mean a risk of serious personal injury.  
Therefore remove the spark plug cap  
when the machine is not under close  
supervision.  
!
IMPORTANT!  
The machine is only designed for trimming grass, grass  
clearing and/or forestry clearing.  
The only accessories you can operate with this engine  
unit are the cutting attachments we recommend in the  
chapter on Technical data.  
Never use the machine if you are tired, if you have drunk  
alcohol, or if you are taking medication that could affect  
your vision, your judgement or your co-ordination.  
Wear personal protective equipment. See instructions  
under the ”Personal protective equipment” heading.  
Personal protective equipment  
Never use a machine that has been modified in any way  
from its original specification.  
IMPORTANT!  
A clearing saw, brushcutter or trimmer can be  
dangerous if used incorrectly or carelessly, and can  
cause serious or fatal injury to the operator or others. It  
is extremely important that you read and understand the  
contents of this operator’s manual.  
Never use a machine that is faulty. Carry out the safety  
checks, maintenance and service instructions  
described in this manual. Some maintenance and  
service measures must be carried out by trained and  
qualified specialists. See instructions under the  
Maintenance heading.  
You must use approved personal protective equipment  
whenever you use the machine. Personal protective  
equipment cannot eliminate the risk of injury but it will  
reduce the degree of injury if an accident does happen.  
Ask your dealer for help in choosing the right equipment.  
All covers, guards and handles must be fitted before  
starting. Ensure that the spark plug cap and ignition  
lead are undamaged to avoid the risk of electric shock.  
The machine operator must ensure that no people or  
animals come closer than 15 meters while working.  
When several operators are working in the same area  
the safety distance should be at least twice the tree  
height and no less than 15 meters.  
WARNING! Listen out for warning signals  
or shouts when you are wearing hearing  
protection. Always remove your hearing  
protection as soon as the engine stops.  
!
Carry out an overall inspection of the machine before  
use. See the maintenance schedule.  
HELMET  
A helmet should be worn if the trees being cleared are  
taller than 2 m.  
WARNING! This machine produces an  
electromagnetic field during operation.  
This field may under some  
circumstances interfere with active or  
passive medical implants.To reduce the  
risk of serious or fatal injury, we  
recommend persons with medical  
implants to consult their physician and  
the medical implant manufacturer before  
operating this machine.  
!
HEARING PROTECTION  
Wear hearing protection that provides adequate noise  
reduction.  
WARNING! Running an engine in a  
confined or badly ventilated area can  
result in death due to asphyxiation or  
carbon monoxide poisoning.  
!
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GENERAL SAFETY PRECAUTIONS  
EYE PROTECTION  
IMPORTANT!  
Always wear approved eye protection. If you use a visor  
then you must also wear approved protective goggles.  
Approved protective goggles must comply with the ANSI  
Z87.1 standard in the USA or EN 166 in EU countries.  
All servicing and repair work on the machine requires  
special training.This is especially true of the machines  
safety equipment. If your machine fails any of the  
checks described below you must contact your service  
agent.When you buy any of our products we guarantee  
the availability of professional repairs and service. If the  
retailer who sells your machine is not a servicing dealer,  
ask him for the address of your nearest service agent.  
GLOVES  
WARNING! Never use a machine with  
faulty safety equipment.The machine's  
safety equipment must be checked and  
maintained as described in this section.  
If your machine fails any of these checks  
contact your service agent to get it  
repaired.  
Gloves should be worn when necessary, e.g. when fitting  
cutting attachments.  
!
Throttle lockout  
BOOTS  
The throttle lockout is designed to prevent accidental  
operation of the throttle control. When you press the lock  
(A) (i.e.when you grasp the handle) it releases the throttle  
control (B). When you release the handle the throttle  
control and the throttle lockout both move back to their  
original positions. This movement is controlled by two  
independent return springs.This arrangement means that  
the throttle control is automatically locked at the idle  
setting.  
Wear boots with steel toe-caps and non-slip sole.  
CLOTHING  
Wear clothes made of a strong fabric and avoid loose  
clothing that can catch on twigs and branches. Always  
wear heavy, long pants. Do not wear jewellery, shorts  
sandals or go barefoot.Secure hair so it is above shoulder  
level.  
A
B
FIRST AID KIT  
Always have a first aid kit nearby.  
Make sure the throttle control is locked at the idle setting  
when the throttle lockout is released.  
Machines safety equipment  
This section describes the machines safety equipment,  
its purpose, and how checks and maintenance should be  
carried out to ensure that it operates correctly. See the  
”What is what?” section to locate where this equipment is  
positioned on your machine.  
The life span of the machine can be reduced and the risk  
of accidents can increase if machine maintenance is not  
carried out correctly and if service and/or repairs are not  
carried out professionally. If you need further information  
please contact your nearest service workshop.  
English 7  
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GENERAL SAFETY PRECAUTIONS  
Press the throttle lockout and make sure it returns to its  
original position when you release it.  
Cutting attachment guard  
This guard is intended to prevent loose objects from being  
thrown towards the operator.The guard also protects the  
operator from accidental contact with the cutting  
attachment.  
Check that the throttle trigger and throttle lockout move  
freely and that the return springs work properly.  
Check that the guard is undamaged and not cracked.  
Replace the guard if it has been exposed to impact or is  
cracked.  
Always use the recommended guard for the cutting  
attachment you are using. See chapter on Technical data.  
WARNING! Never use a cutting  
attachment without an approved guard.  
!
See the chapter on Technical data. If an  
incorrect or faulty guard is fitted this can  
cause serious personal injury.  
See instructions under the heading Start. Start the  
machine and apply full throttle. Release the throttle and  
check that the cutting attachment stops and remains at a  
standstill.If the cutting attachment rotates with the throttle  
in the idle position then the carburettor idle setting must  
be checked. See instructions under the heading  
Maintenance.  
Vibration damping system  
Your machine is equipped with a vibration damping  
system that is designed to minimize vibration and make  
operation easier.  
Stop switch  
Use the stop switch to switch off the engine.  
Use of incorrectly wound cord or an incorrect cutting  
attachment increases the level of vibration. See  
instructions under the heading Cutting equipment.  
The machines vibration damping system reduces the  
transfer of vibration between the engine unit/cutting  
equipment and the machines handle unit.  
Regularly check the vibration damping units for cracks or  
deformation. Check that the vibration damping element is  
undamaged and securely attached.  
Start the engine and make sure the engine stops when  
you move the stop switch to the stop setting.  
8 – English  
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GENERAL SAFETY PRECAUTIONS  
Never use a machine that has a faulty muffler.  
WARNING! Overexposure to vibration  
can lead to circulatory damage or nerve  
damage in people who have impaired  
circulation. Contact your doctor if you  
experience symptoms of overexposure  
to vibration.These symptoms include  
numbness, loss of feeling, tingling,  
pricking, pain, loss of strength, changes  
in skin colour or condition.These  
symptoms normally appear in the  
fingers, hands or wrists.  
!
Muffler  
Regularly check that the muffler is securely attached to  
the machine.  
The muffler is designed to keep noise levels to a minimum  
and to direct exhaust fumes away from the user. A muffler  
fitted with a catalytic converter is also designed to reduce  
harmful exhaust gases.  
If the muffler on your machine is fitted with a spark  
arrestor mesh this must be cleaned regularly. A blocked  
mesh will cause the engine to overheat and may lead to  
serious damage.  
In countries that have a warm and dry climate there is a  
significant risk of fire.We therefore fit certain mufflers with  
a spark arrestor mesh. Check whether the muffler on your  
machine is fitted with this kind of mesh.  
NOTE!  
Make sure that the spark arrestor is screwed in place  
correctly.  
WARNING! Mufflers fitted with catalytic  
converters get very hot during use and  
!
remain so for some time after stopping.  
This also applies at idle speed. Contact  
can result in burns to the skin.  
Remember the risk of fire!  
For mufflers it is very important that you follow the  
instructions on checking, maintaining and servicing your  
machine.  
WARNING! The inside of the muffler  
contain chemicals that may be  
carcinogenic. Avoid contact with these  
elements in the event of a damaged  
muffler.  
!
English 9  
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GENERAL SAFETY PRECAUTIONS  
Grass blades and grass knifes are intended for cutting  
coarse grass.  
WARNING! Bear in mind that:  
!
The exhaust fumes from the engine are  
hot and may contain sparks which can  
start a fire. Never start the machine  
indoors or near combustible material!  
A trimmer head is intended for trimming grass.  
Cutting equipment  
This section describes how to choose and maintain your  
cutting equipment in order to:  
Reduce the risk of blade thrust.  
General rules  
Obtain maximum cutting performance.  
Extend the life of cutting equipment.  
IMPORTANT!  
Only use cutting attachments with the guards we  
recommend! See the chapter on Technical data.  
Only use cutting attachments with the guards we  
recommend! See the chapter on Technical data.  
Refer to the instructions for the cutting attachment to  
check the correct way to load the cord and the correct  
cord diameter.  
Keep the teeth of the blade correctly sharpened! Follow  
our recommendations. Also refer to the instructions on  
the blade packaging.  
Keep the teeth of the blade correctly sharpened! Follow  
our instructions and use the recommended file gauge. An  
incorrectly sharpened or damaged blade increases the  
risk of accidents.  
Maintain the correct blade setting! Follow our  
instructions and use the recommended file gauge.  
WARNING! Always stop the engine  
before doing any work on the cutting  
!
attachment.This continues to rotate even  
after the throttle has been released.  
Ensure that the cutting attachment has  
stopped completely and disconnect the  
spark plug cap before you start to work  
on it.  
Keep the correct setting on the saw blade! Follow our  
instructions and use the recommended setting tool. An  
incorrectly set saw blade increases the risk of jamming  
and blade thrust, and damage to the saw blade.  
WARNING! Using an incorrect cutting  
attachment or an incorrectly sharpened  
blade increases the risk of blade thrust.  
!
Cutting equipment  
Saw blades are intended for cutting fibrous types of wood.  
Check the cutting attachment for damage or cracks. A  
damaged cutting attachment should always be replaced.  
10 – English  
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GENERAL SAFETY PRECAUTIONS  
heavily pitted by stones it may be necessary to dress  
Sharpening grass knifes and grass  
blades  
the top edges of the teeth with a flat file, in exceptional  
cases. If so, this should be done before filing with a  
round file. The top edges must be filed down by the  
same amount for all the teeth.  
See the cutting attachment packaging for correct  
sharpening instructions. Sharpen blades and knifes  
using a single-cut flat file.  
Sharpen all edges equally to maintain the balance of  
the blade.  
Adjust the blade setting. This should be 1 mm.  
WARNING! Always discard a blade that is  
bent, twisted, cracked, broken or  
!
damaged in any other way. Never attempt  
to straighten a twisted blade so that it  
can be reused. Only use original blades  
of the specified type.  
Sharpening the saw blade  
Trimmer head  
IMPORTANT!  
Always ensure the trimmer cord is wound tightly and  
evenly around the drum, otherwise the machine will  
generate harmful vibration.  
See the cutting attachment packaging for correct  
sharpening instructions.  
A correctly sharpened blade is essential for working  
efficiently and to avoid unnecessary wear to the blade and  
brush cutter.  
Only use the recommended trimmer heads and  
trimmer cords. 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 recommended cutting  
attachment. See the chapter on Technical data.  
Smaller machines generally require small trimmer  
heads and vice versa. This is because when clearing  
using a cord the engine must throw out the cord  
radially from the trimmer head and overcome the  
resistance of the grass being cleared.  
The length of the cord is also important. A longer cord  
requires greater engine power than a shorter cord of  
the same diameter.  
Make sure that the blade is well supported when you  
file it. Use a 5.5 mm round file with a file holder.  
Make sure that the cutter on the trimmer guard is  
intact.This is used to cut the cord to the correct length.  
To increase the life of the cord it can be soaked in  
water for a couple of days before use. This will make  
the cord tougher so that it lasts longer.  
The filing angle is 15°. File alternate teeth to the right  
and those in between to the left. If the blade has been  
English 11  
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ASSEMBLY  
Put on the harness and hang the machine from the  
Fitting the handlebar  
support hook. Now make a final adjustment so that  
the machine is in a comfortable working position when  
it hangs from the harness. Tighten the knob.  
Remove the screw at the rear of the throttle handle.  
Slide the throttle handle onto the right side of the  
handlebar, (see diagram).  
Assembling and dismantling the  
two-piece shaft (525RK)  
Align the screw hole in the throttle handle with the hole  
in the handlebar.  
Assembly  
Loosen the coupling by turning the knob.  
Refit the screw in the hole in the rear of the throttle  
handle.  
Align the tab of the attachment (A) with the arrow on  
the coupling (B).  
Screw the screw through the handle and handlebar.  
Tighten it.  
B
Unscrew the knob from the handlebar mounting.  
Position the handlebar as shown. Fit the mounting  
components and tighten the knob lightly.  
A
Push the attachment into the coupling until the  
attachment snaps into place.  
Before using the unit, tighten the knob securely.  
12 – English  
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ASSEMBLY  
Dismantling  
Fitting a blade guard, grass blade  
and grass cutter  
Loosen the coupling by turning the knob (at least 3  
times).  
G
F
E
D
Push and hold the button (C). While securely holding  
the engine end, pull the attachment straight out of the  
coupling.  
A
B
C
C
Hook the blade guard/combination guard (A) onto the  
fitting on the shaft and secure with the bolt.  
CAUTION! Use the recommended blade guard. See  
the Technical data section.  
Fit the drive disc (B) on the output shaft.  
Assembling the cutting  
equipment  
Turn the output shaft until one of the holes in the drive  
disc aligns with the corresponding hole in the gear  
housing.  
WARNING!  
Insert the locking pin (C) in the hole to lock the shaft.  
!
When fitting the cutting attachment it is  
Place the blade (D), support cup (E) and support  
flange (F) on the output shaft.  
extremely important that the raised  
section on the drive disc/support flange  
engages correctly in the centre hole of  
the cutting attachment. If the cutting  
attachment is fitted incorrectly it can  
result in serious and/or fatal personal  
injury.  
Fit the nut (G). The nut must be tightened to a torque  
of 35-50 Nm (3.5-5 kpm). Use the socket spanner in  
the tool kit. Hold the shaft of the spanner as close to  
the blade guard as possible. To tighten the nut, turn  
the spanner in the opposite direction to the direction  
of rotation (Caution! left-hand thread).  
WARNING! Never use a cutting  
attachment without an approved guard.  
See the chapter on Technical data. If an  
incorrect or faulty guard is fitted this can  
cause serious personal injury.  
!
IMPORTANT! If a saw blade or grass blade are to be  
used the machine must be equipped with the correct  
handlebar, blade guard and harness.  
English 13  
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ASSEMBLY  
the spanner in the opposite direction to the direction  
of rotation (Caution! left-hand thread).  
Fitting the blade guard and saw  
blade  
K
J
H
I
L
When loosening and tightening the saw blade nut,  
there is a risk of injury from the teeth of the saw blade.  
You should therefore always ensure that your hand is  
shielded by the blade guard when doing this. Always  
use a socket spanner with a shaft that is long enough  
to allow this.The arrow in the diagram shows the area  
where you should operate the socket spanner when  
loosening or tightening the nut.  
A
Remove the mounting plate (H).Fit the adapter (I) and  
bracket (J) with the two screws (K) as shown. Fit the  
blade guard (A) to the adapter using the 4 screws (L)  
as shown.  
CAUTION! Use the recommended blade guard. See  
the Technical data section.  
G
F
D
Fitting other guards and cutting  
attachments  
B
Fit the trimmer guard/combination guard (A) intended  
for use with the trimmer head/plastic blades. Hook the  
guard onto the fitting on the shaft and secure it with  
the bolt (L).  
C
Fit the drive disc (B) on the output shaft.  
L
Turn the output shaft until one of the holes in the drive  
disc aligns with the corresponding hole in the gear  
housing.  
B
C
Insert the locking pin (C) in the hole to lock the shaft.  
Place the blade (D) and support flange (F) on the  
output shaft.  
Fit the nut (G). The nut must be tightened to a torque  
of 35-50 Nm (3.5-5 kpm). Use the socket spanner in  
the tool kit. Hold the shaft of the spanner as close to  
the blade guard as possible. To tighten the nut, turn  
H
A
Fit the drive disc (B) on the output shaft.  
Turn the output shaft until one of the holes in the drive  
disc aligns with the corresponding hole in the gear  
housing.  
Insert the locking pin (C) in the hole to lock the shaft.  
14 – English  
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ASSEMBLY  
Screw on the trimmer head/plastic blades (H) in the  
opposite direction to the direction of rotation.  
Correct height  
Adjust the shoulder strap so that the cutting attachment is  
parallel to the ground.  
H
H
To dismantle, follow the instructions in the reverse  
order.  
Adjusting the harness and brush  
cutter  
Correct balance  
WARNING! When using a brush cutter it  
Let the cutting attachment rest lightly on the ground.If you  
use a saw blade it should balance about 10 cm above the  
ground to prevent contact with stones and the like. Adjust  
the position of the suspension ring to balance the brush  
cutter correctly.  
must always be hooked securely to the  
!
harness. Otherwise you will be unable to  
control the brush cutter safely and this  
can result in injury to yourself or others.  
Never use a harness with a defective  
quick release.  
Standard harness  
Quick release  
At the front is an easily accessible, quick release.Use this  
if the engine catches fire or in any other emergency  
situation that requires you to free yourself from the  
machine and harness.  
Spreading the load on your shoulders  
A well-adjusted harness and machine makes work much  
easier. Adjust the harness for the best working position.  
Tension the side straps so that the weight is evenly  
distributed across both shoulders.  
English 15  
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FUEL HANDLING  
Petrol  
Fuel safety  
Never start the machine:  
1
2
If you have spilled fuel on it. Wipe off the spillage and  
allow remaining fuel to evaporate.  
CAUTION! Always use a quality petrol/oil mixture at least  
90 octane (RON). If your machine is equipped with a  
catalytic converter (see chapter onTechnical data) always  
use a good quality unleaded petrol/oil mixture. Leaded  
petrol will destroy the catalytic converter.  
If you have spilled fuel on yourself or your clothes,  
change your clothes.Wash any part of your body that  
has come in contact with fuel. Use soap and water.  
3
If the machine is leaking fuel. Check regularly for  
leaks from the fuel cap and fuel lines. In the event of  
leakage, contact your service agent.  
Use low-emission petrol, also known as alkylate petrol, if  
it is available.  
Transport and storage  
Store and transport the machine and fuel so that there  
is no risk of any leakage or fumes coming into contact  
with sparks or open flames, for example, from  
electrical machinery, electric motors, electrical relays/  
switches or boilers.  
Ethanol blended fuel, E10 may be used (max 10%  
ethanol blend). Using ethanol blends higher than E10 will  
create lean running condition which can cause engine  
damage.  
When storing and transporting fuel always use  
approved containers intended for this purpose.  
The lowest octane recommended is 90 (RON). If you  
run the engine on a lower octane grade than 90 so-  
called knocking can occur. This gives rise to a high  
engine temperature, which can result in serious  
engine damage.  
When storing the machine for long periods the fuel  
tank must be emptied. Contact your local petrol  
station to find out where to dispose of excess fuel.  
Ensure the machine is cleaned and that a complete  
service is carried out before long-term storage.  
When working at continuous high revs a higher octane  
rating is recommended.  
The transport guard must always be fitted to the  
cutting attachment when the machine is being  
transported or in storage.  
Two-stroke oil  
For best results and performance use HUSQVARNA  
two-stroke engine oil, which is specially formulated for  
our air-cooled two-stroke engines.  
Secure the machine during transport.  
In order to prevent unintentional starting of the engine,  
the spark plug cap must always be removed during  
long-term storage, if the machine is not under close  
supervision and when performing all service  
measures.  
Never use two-stroke oil intended for water-cooled  
engines, sometimes referred to as outboard oil (rated  
TCW).  
Never use oil intended for four-stroke engines.  
WARNING!Take care when handling fuel.  
Bear in mind the risk of fire, explosion  
and inhaling fumes.  
A poor oil quality and/or too high oil/fuel ratio may  
jeopardise function and decrease the life time of  
catalytic converters.  
!
Mixing ratio  
Fuel  
1:50 (2%) with HUSQVARNA two-stroke oil.  
CAUTION! The machine is equipped with a two-stroke  
engine and must always be run using a mixture of petrol  
and two-stroke oil. It is important to accurately measure  
the amount of oil to be mixed to ensure that the correct  
mixture is obtained. When mixing small amounts of fuel,  
even small inaccuracies can drastically affect the ratio of  
the mixture.  
1:33 (3%) with oils class JASO FB or ISO EGB  
formulated for air-cooled, two-stroke engines.  
Two-stroke oil, litre  
Petrol, litre  
2% (1:50)  
0,10  
3% (1:33)  
0,15  
5
10  
15  
20  
0,20  
0,30  
WARNING! Fuel and fuel fumes are  
highly inflammable and can cause  
serious injury when inhaled or allowed to  
come in contact with the skin. For this  
reason observe caution when handling  
fuel and make sure there is adequate  
ventilation.  
0,30  
0,45  
!
0,40  
0,60  
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FUEL HANDLING  
Fueling  
Mixing  
Always mix the petrol and oil in a clean container  
intended for fuel.  
Always start by filling half the amount of the petrol to  
be used. Then add the entire amount of oil. Mix  
(shake) the fuel mixture. Add the remaining amount of  
petrol.  
WARNING! Taking the following  
precautions, will lessen the risk of fire:  
!
Mix (shake) the fuel mixture thoroughly before filling  
the machine’s fuel tank.  
Mix and pour fuel outdoors, where there  
are no sparks or flames.  
Do not smoke or place hot objects near  
fuel.  
Always shut off the engine before  
refuelling.  
Always stop the engine and let it cool for  
a few minutes before refuelling.  
When refuelling, open the fuel cap slowly  
so that any excess pressure is released  
gently.  
Tighten the fuel cap carefully after  
refuelling.  
Do not mix more than one month’s supply of fuel at a  
time.  
Always move the machine away from the  
refuelling area and source before  
starting.  
If the machine is not used for some time the fuel tank  
should be emptied and cleaned.  
Always use a fuel container with an anti-spill valve.  
WARNING! The catalytic converter  
muffler gets very hot during and after  
use.This also applies during idling. Be  
aware of the fire hazard, especially when  
working near flammable substances and/  
or vapours.  
If you have spilled fuel on it. Wipe off the spillage and  
allow remaining fuel to evaporate.  
!
Clean the area around the fuel cap. Contamination in  
the tank can cause operating problems.  
Ensure that the fuel is well mixed by shaking the  
container before filling the tank.  
English 17  
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STARTING AND STOPPING  
Check before starting  
Starting and stopping  
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.  
WARNING! The complete clutch cover  
and shaft must be fitted before the  
machine is started, otherwise the clutch  
can come loose and cause personal  
injury.  
!
Always move the machine away from the  
refuelling area and source before  
starting. Place the machine on a flat  
surface. Ensure the cutting attachment  
cannot come into contact with any  
object.  
Make sure no unauthorised persons are  
in the working area. Otherwise there is a  
risk of serious personal injury.The safety  
distance is 15 meters.  
Check that the support flange is not cracked due to  
fatigue or due to being tightened too much. Discard  
the support flange if it is cracked.  
Starting  
Air purge: Press the air purge repeatedly until fuel begins  
to fill the bulb. The bulb need not be completely filled.  
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.  
Check that the trimmer head and trimmer guard are  
not damaged or cracked.Replace the trimmer head or  
trimmer guard if they have been exposed to impact or  
are cracked.  
Choke: Set the choke control in the choke position.  
Never use the machine without a guard nor with a  
defective guard.  
WARNING! When the engine is started  
with the choke in either the choke or  
start throttle positions the cutting  
attachment will start to rotate  
immediately.  
All covers must be correctly fitted and undamaged  
before you start the machine.  
!
18 – English  
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STARTING AND STOPPING  
Hold the body of the machine on the ground using your  
left hand (CAUTION! Not with your foot!).  
Stopping  
The engine is stopped by pushing the stop switch to the  
stop position.  
Grip the starter handle, slowly pull out the cord with your  
right hand until you feel some resistance (the starter  
pawls grip), now quickly and powerfully pull the cord.  
Never twist the starter cord around your hand.  
Repeat pulling the cord until engine attemps to start (or  
maximum 5 pulls).  
Move choke control down to run position.  
Pull the cord until engine starts and gradually operate  
throttle trigger for increasing engine speed to operate  
speed.  
CAUTION! Do not pull the starter cord all the way out and  
do not let go of the starter handle when the cord is fully  
extended. This can damage the machine.  
CAUTION! The stop switch automatically returns to the  
start position. In order to prevent unintentional starting,  
the spark plug cap must be removed from the spark plug  
when assembling, checking and/or performing  
maintenance.  
CAUTION! Do not put any part of your body in marked  
area. Contact can result in burns to the skin, or electrical  
shock if the spark plug cap has been damaged. Always  
use gloves. Do not use a machine with damaged spark  
plug cap.  
English 19  
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WORKING TECHNIQUES  
5
Take great care when cutting a tree that is in tension.  
General working instructions  
A tree that is in tension may spring back to its normal  
position before or after being cut. If you position  
yourself incorrectly or make the cut in the wrong place  
the tree may hit you or the machine and cause you to  
lose control. Both situations can cause serious  
personal injury.  
IMPORTANT!  
This section describes the basic safety precautions for  
working with brush cutters and trimmers.  
If you encounter a situation where you are uncertain  
how to proceed you should ask an expert. Contact your  
dealer or your service workshop.  
Avoid all usage which you consider to be beyond your  
capability.  
You must understand the difference between forestry  
clearing, grass clearing and grass trimming before use.  
Basic safety rules  
6
7
Keep a good balance and a firm foothold. Do not  
overreach. Keep proper footing and balance at all  
times.  
Always hold the machine with both hands. Hold the  
machine on the right side of your body. Keep all parts  
of your body away from the hot surfaces. Keep all  
parts of your body away from the rotating cutting  
attachment.  
1
Look around you:  
To ensure that people, animals or other things cannot  
affect your control of the machine.  
To ensure that people, animals, etc., do not come into  
contact with the cutting attachment or loose objects  
that are thrown out by the cutting attachment.  
CAUTION! Do not use the machine unless you are  
able to call for help in the event of an accident.  
2
Inspect the working area. Remove all loose objects,  
such as stones, broken glass, nails, steel wire, string,  
etc. that could be thrown out or become wrapped  
around the cutting attachment.  
3
4
Do not use the machine in bad weather, such as  
dense fog, heavy rain, strong wind, intense cold, etc.  
Working in bad weather is tiring and often brings  
added risks, such as icy ground, unpredictable felling  
direction, etc.  
Make sure you can move and stand safely. Check the  
area around you for possible obstacles (roots, rocks,  
branches, ditches, etc.) in case you have to move  
suddenly. Take great care when working on sloping  
ground.  
8
9
Keep the cutting attachment below waist level.  
Switch off the engine before moving to another area.  
Fit the transport guard before carrying or transporting  
the equipment any distance.  
10 Never put the machine down with the engine running  
unless you have it in clear sight.  
20 – English  
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WORKING TECHNIQUES  
Working methods  
The ABC of clearing  
Always use the correct equipment.  
WARNING! Machines fitted with saw  
blades or grass blades can be thrown  
violently to the side when the blade  
comes into contact with a fixed object.  
This is called blade thrust. A blade thrust  
can be violent enough to cause the  
machine and/or operator to be propelled  
in any direction, and possibly lose  
control of the machine. Blade thrust can  
occur without warning if the machine  
snags, stalls or binds. Blade thrust is  
more likely to occur in areas where it is  
difficult to see the material being cut.  
Make sure the equipment is well adjusted.  
Follow the safety precautions.  
!
Organise your work carefully.  
Always use full throttle when starting to cut with the  
blade.  
Always use sharp blades.  
Avoid stones.  
Control the felling direction (take advantage of the  
wind).  
WARNING! Neither the operator of the  
machine nor anyone else may attempt to  
remove the cut material while the engine  
is running or the cutting equipment is  
rotating, as this can result in serious  
injury.  
Avoid cutting with the area of the blade  
between the 12 o'clock and 3 o'clock  
positions. Because of the speed of  
rotation of the blade, blade thrust can  
occur if you attempt to cut thick stems  
with this area of the blade.  
!
Stop the engine and cutting equipment  
before you remove material that has  
wound around the blade shaft as  
otherwise there is a risk of injury.The  
bevel gear can get hot during use and  
may remain so for a while afterwards.  
You could get burnt if you touch it.  
Before you start clearing, check the clearing area, the  
type of terrain, the slope of the ground, whether there  
are stones, hollows etc.  
Start at whichever end of the area is easiest, and clear  
an open space from which to work.  
Work systematically to and fro across the area,  
clearing a width of around 4-5 m on each pass. This  
exploits the full reach of the machine in both directions  
and gives the operator a convenient and varied  
working area to work in.  
WARNING! Watch out for thrown objects.  
Always wear approved eye protection.  
Never lean over the cutting attachment  
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 metres. Stop the  
machine immediately if anyone  
approaches. Never swing the machine  
around without first checking behind you  
to make sure no-one is within the safety  
zone.  
Clear a strip around 75 m long. Move your fuel can as  
work progresses.  
WARNING! Sometimes branches or  
grass get caught between the guard and  
cutting attachment. Always stop the  
engine before cleaning.  
!
On sloping ground you should work along the slope. It  
is much easier to work along a slope than it is to work  
up and down it.  
You should plan the strip so that you avoid going over  
ditches or other obstacles on the ground.You should  
also orient the strip to take advantage of wind  
English 21  
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WORKING TECHNIQUES  
conditions, so that cleared stems fall in the cleared  
To fell to the right, the bottom of the tree should be  
area of the stand.  
pushed to the left.Tilt the blade and bring it diagonally  
up to the right. Cut with the area of the blade between  
3 o’clock and 5 o’clock so that the direction of rotation  
of the blade pushes the bottom of the tree to the left.  
Forestry clearing using a saw blade  
To fell a tree forwards, the bottom of the tree should be  
pulled backwards. Pull the blade backwards with a  
quick, firm movement.  
The risk of blade thrust increases with increasing  
stem size.You should therefore avoid cutting with the  
area of the blade between 12 o'clock and 3 o'clock.  
Large stems must be cut from two sides. First  
determine which direction the stem will fall. Make the  
first cut on the felling side.Then finish cutting the stem  
from the other side. Adjust the cutting pressure to  
match the size of the stem and the hardness of the  
wood.Small stems require more pressure, while large  
stems require less pressure.  
To fell to the left, the bottom of the tree should be  
pushed to the right. Tilt the blade and bring it  
diagonally down to the right, exerting firm pressure.At  
the same time push the stem using the blade guard.  
Cut with the area of the blade between 3 o’clock and  
5 o’clock. Apply full throttle before advancing the  
blade.  
If the stems are tightly packed, adapt your walking  
pace to suit.  
If the blade jams in a stem, never jerk the machine  
free. If you do this the blade, bevel gear, shaft or  
handlebar may be damaged. Release the handles,  
grip the shaft with both hands and gently pull the  
machine free.  
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WORKING TECHNIQUES  
Try to work rhythmically. Stand firmly with your feet  
apart. Move forward after the return stroke and stand  
firmly again.  
Brush cutting with a saw blade  
Let the support cup rest lightly against the ground. It  
is used to protect the blade from hitting the ground.  
Thin stems and brush are mown down. Work with a  
sawing movement, swinging sideways.  
Reduce the risk of material wrapping around the blade  
by following these instructions:  
Try to cut several stems in a single sawing movement.  
With groups of hardwood stems, first clear around the  
group. Start by cutting the stems high up around the  
outside of the group to avoid jamming. Then cut the  
stems to the required height. Now try to reach in with  
the blade and cut from the centre of the group. If it is  
still difficult to gain access, cut the stems high up and  
let them fall. This will reduce the risk of jamming.  
1Always work at full throttle.  
2Avoid the previously cut material during the return  
stroke.  
Stop the engine, unclip the harness and place the  
machine on the ground before you start to collect the  
cut material.  
Grass trimming with a trimmer head  
Trimming  
Hold the trimmer head just above the ground at an  
angle. It is the end of the cord that does the work. Let  
the cord work at its own pace. Never press the cord  
into the area to be cut.  
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.  
Grass clearing using a grass blade  
Reduce the risk of damaging plants by shortening the  
cord to 10-12 cm and reducing the engine speed.  
Grass blades and grass knifes must not be used on  
woody stems.  
Clearing  
• The clearing technique removes all unwanted  
A grass blade is used for all types of tall or coarse  
grass.  
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.  
CAUTION! This technique increases the wear on the  
cord.  
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 left-hand side of the  
blade (between 8 and 12 o’clock) do the cutting.  
If the blade is angled to the left when clearing grass,  
the grass will collect in a line, which makes it easier to  
collect, e.g. by raking.  
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.  
English 23  
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WORKING TECHNIQUES  
When trimming and clearing, you should use less than  
full throttle (80%) so that the cord lasts longer and to  
reduce the wear on the trimmer head.  
Cutting  
• The trimmer is ideal for cutting 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.  
Do not allow the trimmer head to constantly come into  
contact with the ground during normal cutting.  
Constant contact of this type can cause damage and  
wear to the trimmer head.  
Sweeping  
• The fan effect of the rotating cord can be used for  
quick and easy clearing up. Hold the cord parallel to  
and above the area to be swept and move the tool side  
to side.  
When cutting and sweeping you should use full  
throttle to obtain the best results.  
IMPORTANT!  
To avoid unbalance and vibrations in handles trimmer  
head cover need to be cleaned every time cord is  
refilled. In addition, check other part of the head if  
needed to be cleaned.  
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MAINTENANCE  
CAUTION! If the cutting attachment rotates when the  
engine is idling the idle adjustment screw T should be  
turned anti-clockwise until the cutting attachment stops.  
Carburettor  
Your Husqvarna product has been designed and  
manufactured to specifications that reduce harmful  
emissions. After the engine has used 8-10 tanks of fuel  
the engine will be run-in.To ensure that it continues to run  
at peak performance and to minimise harmful exhaust  
emissions after the running-in period, ask your dealer/  
service workshop (who will have a rev counter at their  
disposal) to adjust your carburettor.  
Adjustment of the idle speed  
Before any adjustments are made, make sure that the air  
filter is clean and the air filter cover is fitted.  
Adjust the idle speed using the idle adjustment screw T, if  
it is necessary to readjust. First turn the idle adjustment  
screw T clockwise until the cutting attachment starts to  
rotate.Then turn the screw anticlockwise until the cutting  
attachment stops. The idle speed is correctly adjusted  
when the engine will run smoothly in every position. The  
idle speed should also be well below the speed at which  
the cutting attachment starts to rotate.  
Function  
The carburettor governs the engine’s speed via the  
throttle control. Air and fuel are mixed in the  
carburettor.The air/fuel mixture is adjustable. Correct  
adjustment is essential to get the best performance  
from the machine.  
Adjusting the carburettor means that the engine is  
adapted to local operating conditions, e.g. climate,  
altitude, petrol and the type of 2-stroke oil.  
The carburettor has three adjustment controls:  
L = Low speed jet  
Recommended idle speed: See the Technical data  
section.  
H = High speed jet  
T = Idle adjustment screw  
WARNING! If the idle speed cannot be  
T
adjusted so that the cutting attachment  
!
stops, contact your dealer/service  
workshop. Do not use the machine until  
it has been correctly adjusted or  
repaired.  
H
L
Muffler  
The L and H-jets are used to adjust the supply of fuel  
to match the rate that air is admitted, which is  
controlled with the throttle. If they are screwed  
clockwise the air/fuel ratio becomes leaner (less fuel)  
and if they are turned anti-clockwise the ratio  
becomes richer (more fuel). A lean mixture gives a  
higher engine speed and a rich mixture gives a lower  
engine speed.  
CAUTION! Some mufflers are fitted with a catalytic  
converter. See chapter on Technical data to see whether  
your machine is fitted with a catalytic converter.  
The muffler is designed to reduce the noise level and to  
direct the exhaust gases away from the operator. The  
exhaust gases are hot and can contain sparks, which may  
cause fire if directed against dry and combustible  
material.  
The T-screw regulates the throttle setting at idle  
speed. If the T-screw is turned clockwise this gives a  
higher idle speed; turning it anti-clockwise gives a  
lower idle speed.  
Basic setting  
The basic carburettor settings are adjusted during  
testing at the factory. The basic setting is richer than  
the optimal setting and should be maintained for the  
first few hours the machine is in use. The carburettor  
should then be finely adjusted. Fine adjustment  
should be carried out by a skilled technician.  
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MAINTENANCE  
Some mufflers are equipped with a special spark arrestor  
The cooling system consists of:  
mesh. If your machine has this type of muffler, you should  
clean the mesh at least once a week. This is best done  
with a wire brush. On mufflers without a catalytic  
converter the mesh should be cleaned weekly, or  
replaced if necessary. On mufflers fitted with a catalytic  
converter the mesh should be checked, and if necessary  
cleaned, monthly. If the mesh is damaged it should be  
replaced. If the mesh is frequently blocked, this can be a  
sign that the performance of the catalytic converter is  
impaired. Contact your dealer to inspect the muffler. A  
blocked mesh will cause the machine to overheat and  
result in damage to the cylinder and piston.  
1
2
3
4
5
6
Air intake on the starter.  
Fins on the flywheel.  
Cooling fins on the cylinder.  
Cylinder cover (directs cold air over the cylinder).  
Muffler cover  
Muffler plate  
Clean the cooling system with a brush once a week, more  
often in demanding conditions. A dirty or blocked cooling  
system results in the machine overheating which causes  
damage to the piston and cylinder.  
Spark plug  
The spark plug condition is influenced by:  
Incorrect carburettor adjustment.  
An incorrect fuel mixture (too much or incorrect type  
of oil).  
A dirty air filter.  
CAUTION! Never use a machine with a defective muffler.  
These factors cause deposits on the spark plug  
electrodes, which may result in operating problems and  
starting difficulties.  
WARNING! Mufflers fitted with catalytic  
converters get very hot during use and  
!
If the machine is low on power, difficult to start or runs  
poorly at idle speed: always check the spark plug first  
before taking any further action. If the spark plug is dirty,  
clean it and check that the electrode gap is 0,65 mm.The  
spark plug should be replaced after about a month in  
operation or earlier if necessary.  
remain so for some time after stopping.  
This also applies at idle speed. Contact  
can result in burns to the skin.  
Remember the risk of fire!  
Cooling system  
0,65  
To keep the working temperature as low as possible the  
machine is equipped with a cooling system.  
CAUTION! Always use the recommended spark plug  
type! Use of the wrong spark plug can damage the piston/  
cylinder. Check that the spark plug is fitted with a  
suppressor.  
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MAINTENANCE  
Bevel gear  
Air filter  
The bevel gear is filled with the right quantity of grease at  
the factory. However, before using the machine you  
should check that the bevel gear is filled three-quarters  
full with grease. Use HUSQVARNA special grease.  
The air filter must be regularly cleaned to remove dust  
and dirt in order to avoid:  
Carburettor malfunctions  
Starting problems  
Loss of engine power  
Unnecessary wear to engine parts.  
Excessive fuel consumption.  
The grease in the bevel gear does not normally need to  
be changed except if repairs are carried out.  
Two-piece shaft (525RK)  
Clean the filter every 25 hours, or more regularly if  
conditions are exceptionally dusty.  
The drive shaft end in the lower shaft should be lubricated  
with grease every 30 hours. There is a risk that the drive  
shaft ends (splined coupling) on models with two-piece  
shafts will seize if they are not lubricated regularly.  
Cleaning the air filter  
Close the choke control by setting the choke into a choke  
position.  
Remove the air filter cover and take out the filter. Wash it  
clean in warm, soapy water. Clean also the inside of the  
filter cover by using air or a brush. Ensure that the filter is  
dry before refitting it.  
Remove the Felt filter from the filter holder and gently  
brush debris from the filter. Check the rubber sealing  
surface. Change the filter on the rubber seal if damaged.  
An air filter that has been in use for a long time cannot be  
cleaned completely.The filter must therefore be replaced  
with a new one at regular intervals. A damaged air filter  
must always be replaced. Damaged, very dirty, or fuel-  
soaked air filter must always be replaced.  
English 27  
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MAINTENANCE  
Maintenance schedule  
The following is a list of the maintenance steps that must be performed on the machine. Most of the items are described  
in the Maintenance section.The user must only carry out the maintenance and service work described in this Operator's  
Manual. More extensive work must be carried out by an authorized service workshop.  
Daily  
maintenance  
Weekly  
maintenance  
Monthly  
maintenance  
Maintenance  
Clean the outside of the machine.  
X
Make sure the throttle trigger lock and the throttle function  
correctly from a safety point of view.  
X
Check that the stop switch works correctly.  
Check that the cutting attachment does not rotate at idle.  
Clean the air filter. Replace if necessary.  
X
X
X
Check that the guard is undamaged and not cracked. Replace  
the guard if it has been exposed to impact or is cracked.  
X
Check that the trimmer head is undamaged and not cracked.  
Replace the trimmer head if necessary.  
X
X
X
Check that nuts and screws are tight.  
Check that there are no fuel leaks from the engine, tank or fuel  
lines.  
Check the starter and starter cord.  
X
X
Check that the vibration damping elements are not damaged.  
Clean the outside of the spark plug. Remove it and check the  
electrode gap. Adjust the gap to 0,65 mm or replace the spark  
plug. Check that the spark plug is fitted with a suppressor.  
X
Clean the machine’s cooling system.  
X
X
X
X
Clean or replace the spark arrestor mesh on the muffler (only  
applies to mufflers without a catalytic converter).  
Clean the outside of the carburettor and the space around it.  
Check that the bevel gear is filled three-quarters full with  
lubricant. Fill if necessary using special grease.  
Check the fuel filter from contamination and the fuel hose from  
cracks or other defects. Replace if necessary.  
X
X
X
Check all cables and connections.  
Check the clutch, clutch springs and the clutch drum for wear.  
Replace if necessary by an autorized service workshop.  
Replace the spark plug. Check that the spark plug is fitted with a  
suppressor.  
X
X
Check and clean the spark arrestor mesh on the muffler (only  
applies to mufflers fitted with a catalytic converter).  
28 – English  
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TECHNICAL DATA  
Technical data  
Technical data  
525RX  
525RXT  
525RK  
Engine  
Cylinder displacement, cm3  
25,4  
25,4  
25,4  
Cylinder bore, mm  
34  
34  
34  
Stroke, mm  
28  
28  
28  
Idle speed, rpm  
3000  
3000  
3000  
Recommended max. speed, rpm  
Trimmer head/Grass blade  
Speed of output shaft, rpm  
Trimmer head/Grass blade  
9500/11000  
9500/11000  
9500/11000  
6500/7500  
6500/7500  
6500/7500  
Max. engine output, acc. to ISO 8893, kW/ rpm  
Catalytic converter muffler  
Speed-regulated ignition system  
Ignition system  
1,0/8500  
Yes  
1,0/8500  
Yes  
1,0/8500  
Yes  
Yes  
Yes  
Yes  
Spark plug  
NGK BPMR8Y  
0,65  
NGK BPMR8Y  
0,65  
NGK BPMR8Y  
0,65  
Electrode gap, mm  
Fuel and lubrication system  
Fuel tank capacity, litre  
Weight  
0,51  
5,1  
0,51  
5,4  
0,51  
5,6  
Weight without fuel, cutting attachment and guard, kg  
Noise emissions  
(see note 1)  
Sound power level, measured dB (A)  
Sound power level, guaranteed LWA dB (A)  
Noise levels  
104  
106  
104  
106  
104  
106  
(see note 2)  
Equivalent sound pressure level at the operator’s ear,  
measured according to EN ISO 11806 and ISO 22868,  
dB(A):  
Equipped with trimmer head (original)  
Equipped with grass blade (original)  
Vibration levels  
94  
94  
93  
92  
94  
93  
(see note 3)  
Vibration levels at handles, measured according to EN  
ISO 22867, m/s2  
Equipped with trimmer head (original), left/right  
Equipped with grass blade (original), left/right  
2,1/2,3  
1,9/2,2  
1,8/1,9  
1,9/2,0  
2,1/1,9  
2,3/2,5  
Note 1: Noise emissions in the environment measured as sound power (LWA) in conformity with EC directive 2000/14/  
EC. Reported sound power level for the machine has been measured with the original cutting attachment that gives the  
highest level.The difference between guaranteed and measured sound power is that the guaranteed sound power also  
includes dispersion in the measurement result and the variations between different machines of the same model  
according to Directive 2000/14/EC.  
Note 2: Reported data for equivalent sound pressure level for the machine has a typical statistical dispersion (standard  
deviation) of 1 dB (A).  
Note 3: Reported data for equivalent vibration level has a typical statistical dispersion (standard deviation) of 1 m/s2.  
English – 29  
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TECHNICAL DATA  
Approved accessories  
Type  
Cutting attachment guard, Art. no.  
Centre hole in blades/cutters, Ø 25,4  
mm  
Blade shaft thread M10  
Grass 255-4 1" (Ø 255 4-teeth)  
Grass blade 255-3 (Ø 255 3 teeth)  
Scarlet 200-22 1" (Ø 200 22 teeth)  
503 93 42-02  
503 93 42-02  
537 29 95-01  
Grass blade/grass cutter  
Saw blade  
Tricut Ø 300 mm (Separate blades  
have part number 531 01 77-15)  
Plastic blades  
503 93 42-02  
T25 (Ø 2.0 - 2.7 mm cord)  
T35, T35x (Ø 2.4 - 3.0 mm cord)  
Superauto II  
503 93 42-02 / 503 97 71-01  
503 93 42-02 / 503 97 71-01  
503 93 42-02 / 503 97 71-01  
503 93 42-02 / 503 97 71-01  
-
Trimmer head  
Support cup  
Alloy (up to Ø 2,4 mm cord)  
Fixed  
EC Declaration of Conformity  
(Applies to Europe only)  
We, Husqvarna AB, SE-561 82 Huskvarna, Sweden, tel: +46-36-146500, declare that the brush cutters Husqvarna  
525RX, 525RXT, 525RK with serial numbers dating from 2013 onwards (the year is clearly stated on the rating plate,  
followed by the serial number), comply with the requirements of the COUNCILS DIRECTIVE:  
- of May 17, 2006 ”relating to machinery” 2006/42/EC  
- of December 15, 2004 ”relating to electromagnetic compatibility” 2004/108/EC.  
- of May 8, 2000 ”relating to the noise emissions in the environment” 2000/14/EC. Conformity assessment according  
to Annex V. For information relating to noise emissions, see the Technical data chapter.  
The following standards have been applied:  
EN ISO 12100:2010, EN ISO 11806-1:2011, ISO 14982:1998, CISPR 12:2007  
SMP Svensk Maskinprovning AB, Box 7035, SE-750 07 Uppsala, Sweden, has performed voluntary type examination  
on behalf of Husqvarna AB. The certificates are numbered: SEC/13/2383 - 525RX, 525RXT, 525RK  
Huskvarna 31 October 2013  
Per Gustafsson, Development manager (Authorized representative for Husqvarna AB and responsible for technical  
documentation.)  
30 – English  
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Alloy  
1
2
ø 2,0 - 2,4 mm/ .080-.095"  
ø 2,0 - 3,3 mm/ .080- .130"  
M10  
M12  
3
4
5
550 mm/ 22"  
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Super Auto II  
Super Auto II 1  
"
1
2
3
6
4
5
4,0 m  
13'  
15 cm  
~2,0 m  
6,5  
6
"
'
15 cm  
6
8
7
"
9
10  
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T25  
1
2
3
6,0 m  
18'  
10 cm  
4"  
3,05 m  
9'  
4
5
7
6
8
"Clic"  
15 cm  
6"  
9
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T35, T35x  
1
2
3
8,5 m  
28'  
10 cm  
4"  
4,3 m  
14'  
4
5
7
6
8
"Clic"  
15 cm  
6"  
9
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Original instructions  
1154807-26  
´®z+Vph¶6n¨  
´®z+Vph¶6n¨  
2013-11-13  
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