McCulloch MAC 250 L User manual

115307426 Rev. 3 11/30/10 BRW
INSTRUCTION MANUAL
IMPORTANT INFORMATION: Please read these instructions carefully and make
sure you understand them before using this unit. Retain these instructions for future
reference.
MANUEL D’INSTRUCTIONS
RENSEIGNEMENTS IMPORTANTS: Avant d’utiliser cet appareil, veuillez lire
atentivement les instructions et assurez--vous de les avoir comprises. Conservez
les instructions pour référence ultérieure.
BETRIEBSANWEISUNG
WICHTIGE INFORMATION: Lesen Sie diese Hinweise zur Handhabung des
Geräts aufmerksam durch. Verwenden Sie es erst, wenn Sie sicher sind, daß Sie
alle Anweisungen verstanden haben und gut aufbewahren.
MANUAL DE INSTRUCCIONES
INFORMACIÓN IMPORTANTE: Lea atentamente las instrucciones y
asegúrese de entenderlas antes de utilizar esta aparato. Conserve las instruc-
ciones para la referencia en el futuro.
GB
FR
DE
ES

2
IDENTIFICATION (WHAT IS WHAT?)
6
14
20
19
7
16
2
17
891
3
10
21
5
13 15
18
4
11
12
22
1. Fuel tank
2. Loop handle
3. ON/STOP switch
4. Shoulder strap clamp
5. Shoulder strap
6. Trimmer head
7. Line limiter blade
8. Combination shield
9. Shaft
10. J--handle
11. Blade
12. Throttle trigger
13. Throttle lock--out
14. Starter handle
15. Fuel cap
16. Primer bulb
17. Choke lever
18. Muffler
19. Wrench
20. Hex wrench
21. Instruction manual
22. Transport guard
IDENTIFICATION OF SYMBOLS
A.
B.
C.
D.
E.
F.
G.
H.
I.
J.
K.

3
A. WARNING! This brushcutter can be dangerous! Careless or improper use can
cause serious or even fatal injury.
B. Read and understand the instruction manual before using the brushcutter.
C. Always use:
Ear protection, eye protection, head protection, boots, and gloves.
D. DANGER! Blade can thrust violently away from material it does not cut. Blade
thrust can cause amputation of arms or legs. Keep people and animals 15 meters
away.
E.WARNING! Blade/trimmer line can throw objects violently. You and others can be
blinded or injured. Always wear eye protection and leg protection.
F. The operator of the machine must insure that no one comes within a 15 meter radius
while working. When several operators are working within the same area a safety dis-
tance of at least 15 meters must be observed.
G. Use unleaded or quality leaded petrol and two--stroke oil mixed at a ratio of 2.5%.
H. Assist handle to be positioned only below the arrow.
I. Engine ON/STOP Switch.
J. Guaranteed sound power level according to Directive 2000/14/EC
K. Maximum rotational frequency of the spindle, rpm
SAFETY RULES
WARNING: When using gardening
appliances, basic safety precautions should al-
ways be followed to reduce the risk of fire and
serious injury. Read and follow all instructions.
DANGER: This power tool can be
dangerous! This unit can cause serious injury
including amputation or blindness to the op-
erator and others. The warnings and safety
instructions in this manual must be followed to
provide reasonable safety and efficiency in
using the unit. The operator is responsible for
following the warnings and instructions in this
manual and on the unit. Read the entire in-
struction manual before assembling and us-
ing the unit! Restrict the use of this unit to per-
sons who read, understand, and follow the
warnings and instructions in this manual and
on the unit. Never allow children to operate
this unit.
SAFETY INFORMATION
ON THE UNIT
INSTRUCTION
MANUAL
DANGER: Blade can thrust violently
away from material it does not cut. Blade
thrust can cause amputation of arms or legs.
Keep people and animals 15 meters away.
WARNING: Blade/trimmer line can
throw objects violently. You and others can be
blinded or injured. Wear safety glasses and
leg protection.
WARNING: Hazard zone for thrown
objects. Blade/Trimmer line can throw objects
violently. Others can be blinded or injured.
Keep people and animals 15 meters away.
Hazard Zone
WARNING: Do not use trimmer head
as a fastening device for the blade.

4
WARNING: The blade continues to
spin after the throttle is released or, engine is
turned off. The coasting blade can throw objects
or seriously cut if accidentally touched. Stop the
blade by contacting the right hand side of the
coasting blade with material already cut.
Stop coasting
blade by contact
with cut material.
OPERATOR SAFETY
WARNING: This machine produces
an electromagnetic field during operation. Under
some circumstances, this field may interfere
with active or passive medical implants. To re-
duce the risk of serious or fatal injury, we recom-
mend persons with medical implants to consult
their physician and the medical implant
manufacturer before operating this machine.
SDress properly. Always wear safety
glasses or similar eye protection when op-
erating, or performing maintenance, on
your unit (safety glasses are available).
Eye protection should be marked Z87.
SAlways wear a helmet if the trees to be
cleared are taller than 2 meters.
SAlways wear face or dust mask if operation
is dusty.
SAlways wear heavy, long pants, long
sleeves, boots, and gloves. Wearing safety
leg guards is recommended.
SAlways wear foot protection. Do not go
barefoot or wear sandals. Stay clear of
blade/spinning line.
SSecure hair above shoulder length. Secure
or remove loose clothing or clothing with
loosely hanging ties, straps, tassels, etc.
They can be caught in moving parts.
SBeing fully covered also helps protect you
from debris and pieces of toxic plants
thrown by spinning line.
SStay alert. Do not operate this unit when you
are tired, ill, upset or under the influence of al-
cohol, drugs, or medication. Watch what you
are doing; use common sense.
SWear hearing protection. Long or continu-
ous exposure to high noise levels may
cause permanent hearing impairment.
SMufflers 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!
SNever start or run inside a closed room or
building. Breathing exhaust fumes can kill.
SKeep handles free of oil and fuel.
SAlways use the handlebar and a properly
adjusted shoulder strap with a blade (see
ASSEMBLY).
UNIT / MAINTENANCE SAFETY
WARNING: Stop unit and disconnect
the spark plug before performing mainte-
nance (except carburetor adjustments).
SThrow away blades that are bent, warped,
cracked, broken, or damaged in any other
way. Replace trimmer head parts that are
cracked, chipped, broken, or damaged in
any other way before using the unit.
SMaintain unit according to recommended
procedures. Keep blade sharp. Keep cut-
ting line at the proper length.
SUse only 2,4 mm diameter McCulloch
brand replacement line. Never use wire,
rope, string, etc.
SInstall required shield properly before using
the unit.
SUse only specified blade or trimmer head;
make sure it is properly installed and se-
curely fastened.
SNever start engine with clutch shroud re-
moved. The clutch can fly off and cause se-
rious injury.
SBe sure blade or trimmer head stops turning
when engine idles.
SMake carburetor adjustments with the lower
end supported to prevent blade or trimmer line
from contacting any object. Hold unit by hand;
do not use the shoulder strap for support.
SKeep others away when making carbure-
tor adjustments.
SUse only recommended McCulloch accesso-
ries and replacement parts.
SHave all maintenance and service not ex-
plained in this manual performed by your au-
thorised service dealer.
FUEL SAFETY
SMix and pour fuel outdoors.
SKeep away from sparks or flames.
SUse a container approved for fuel.
SDo not smoke or allow smoking near fuel or
the unit.
SAvoid spilling fuel or oil. Wipe up all fuel spills.
SMove at least 3 meters away from fueling
site before starting engine.
SStop engine and allow to cool before re-
moving fuel cap.
SAlways store petrol in a container approved
for flammable liquids.
CUTTING SAFETY
WARNING: Inspect the area to be cut
before each use. Remove objects (rocks,
broken glass, nails, wire, string, etc.) which
can be thrown or become entangled in the
blade or trimmer head.
SKeep others including children, animals,
bystanders, and helpers at least 15 meters
away. Stop engine immediately if you are
approached.
SAlways keep engine on the right--hand side
of your body.

5
SHold the unit firmly with both hands.
SKeep firm footing and balance. Do not
overreach.
SKeep blade or trimmer head below waist
level. Do not raise engine above your waist.
SKeep all parts of your body away from blade,
trimmer head, and muffler when engine is
running. A hot muffler can cause serious
burns.
SCut from your left to your right. Cutting on
right side of the shield will throw debris
away from the operator.
SUse only in daylight or good artificial light.
SUse only for jobs explained in this manual.
TRANSPORTING AND STORAGE
SAllow the engine to cool; secure unit before
storing or transporting in vehicle.
SEmpty fuel tank before storing or transporting
the unit. Use up fuel left in the carburetor by
starting engine and letting it run until it stops.
SStore unit and fuel in an area where fuel va-
pors cannot reach sparks or open flames
from water heaters, electric motors or
switches, furnaces, etc.
SStore unit so line limiter cannot accidentally
cause injury. Unit can be hung by the shaft.
SAlways install transport guard on blade be-
fore transporting or strorage.
SStore the unit out of the reach of children.
SSecure the machine during transport.
SPECIAL NOTICE: Exposure to vibra-
tions through prolonged use of petrol pow-
ered hand tools could cause blood vessel or
nerve damage in the fingers, hands, and
joints of people prone to circulation disorders
or abnormal swellings. Prolonged use in cold
weather has been linked to blood vessel dam-
age in otherwise healthy people. If symptoms
occur such as numbness, pain, loss of
strength, change in skin color or texture, or
loss of feeling in the fingers, hands, or joints,
discontinue the use of this tool and seek med-
ical attention. An anti-vibration system does
not guarantee the avoidance of these prob-
lems. Users who operate power tools on a
continual and regular basis must monitor
closely their physical condition and the condi-
tion of this tool.
ASSEMBLY
CARTON CONTENTS
Check carton contents against the following
list:
SBrushcutter
SBlade
SCupped washer
SLarge nut for installing blade
STrimmer head
SCombination shield
SBolt
SLoop handle
SSecuring plate
SBolt
SNut
SJ--handle
SHex wrench
SWrench
SShoulder strap
STransport guard
WARNING: Always stop unit and dis-
connect spark plug before performing any as-
sembly procedures.
WARNING: If received assembled,
repeat all steps to ensure your unit is properly
assembled and all fasteners are secure.
Examine parts for damage. Do not use dam-
aged parts.
It is normal for the fuel filter to rattle in the
empty fuel tank.
Finding fuel or oil residue on muffler is normal
due to carburetor adjustments and testing
done by the manufacturer.
TOOLS REQUIRED
SHex wrench (provided)
SAdjustable wrench
SPhillips screwdriver
ATTACHING THE HANDLE
DANGER: To avoid serious injury, the
barrier portion of the handle must be installed as
shown to provide a barrier between operator
and the spinning blade.
1. Position the loop handle on the shaft. Note
that the handle must be mounted between
the arrows on the shaft.
Wrench
Handle Bolt
Securing
plate
Nut
2. Install the bolt, securing plate and nut as
shown in the illustration.

6
3. Make a final adjustment of the handle to a
comfortable working position. Tighten the
nut firmly with wrench (provided).
ASSEMBLY OF SHOULDER STRAP
Proper shoulder strap and handlebar adjust-
ments must be made with the engine com-
pletely stopped before using unit.
1. Insert your right arm and head through the
shoulder strap and allow it to rest on your
left shoulder. Make sure the hook is to the
right side of your waist.
NOTE: A one-half twist is built in the shoul-
der strap to allow the strap to rest flat on the
shoulder.
2. Adjust the strap, allowing the hook to be
about 15 cm below the waist.
3. Fasten the strap hook to the clamp located
between the trigger handle and the handle-
bar clamp base and lift the tool to the operat-
ing position.
4. Try on shoulder strap and adjust for fit and
balance before starting the engine or be-
ginning a cutting operation.
NOTE: It may be necessary to relocate the
shoulder strap clamp on the shaft for proper
balancing of unit.
TO RELOCATE SHOULDER STRAP
CLAMP:
1. Loosen and remove both clamp screws.
2. Place the upper shoulder strap clamp
over the shaft.
3. Position the lower shoulder strap clamp
under the shaft and align the upper and
lower clamp screw holes.
Upper Shoulder
Strap Clamp
Screws
Lower Shoulder
Strap Clamp
4. Insert two screws into the screw holes.
5. Secure shoulder strap clamp by tighten-
ing screws with a hex wrench.
76 cm
HARNESS
ADJUSTMENT
FOR BALANCE
10 -- 30 cm
above
ground
15 cm
below
waist
76 cm
ATTACHING THE SHIELD
WARNING: The shield must be prop-
erly installed. The shield provides partial
protection to the operator and others from the
risk of thrown objects, and is equipped with a
line limiter blade which cuts excess line to the
proper length. The line limiter blade (on un-
derside of shield) is sharp and can cut you.
1. Insert bracket into slot on shield.
2. Pivot shield to align holes in shield and
bracket.
Slot Shield
Bracket
3. Secure shield to bracket with bolt.

7
Bolt
CONFIGURING YOUR UNIT
You can configure your unit using a cutting head
for grass and light weeds, or a weed blade for
cutting grass, weeds, and brush up to 1 cm in
diameter. To assemble your unit, go to the sec-
tion for the desired configuration and follow the
instructions.
ASSEMBLY INFORMATION --
TRIMMER HEAD
TRIMMER
HEAD
NOTE: Remove the blade before attaching the
trimmer head. To remove blade, align hole in
the dust cup with the hole in the side of the
gearbox by rotating the blade. Insert a small
screwdriver into aligned holes. This will keep
the shaft from turning while loosening the blade
nut. Remove blade nut by turning clockwise.
Remove the screwdriver. Remove both wash-
ers and blade. See INSTALLATION OF THE
METAL BLADE for illustrations. Be sure to store
all parts and instructions for future use.
INSTALLATION OF THE TRIMMER
HEAD
NOTE: If your unit has a plastic cover over
the threads on the threaded shaft, remove the
covering to expose the threads. Before instal-
ling the trimmer head, make sure the dust cup
and retaining washer are positioned on the
gearbox as shown below.
Retaining washer
Dust cup
Gearbox
Shield
NOTE: Make sure all parts are properly
installed as shown in the illustration before
installing the trimmer head.
1. Align hole in the dust cup with the hole in the
side of the gearbox by rotating the dust cup.
2. Insert a small screwdriver into aligned
holes. This will keep the shaft from turning
while tightening trimmer head.
3 While holding the screwdriver in position,
thread trimmer head onto the shaft in the
direction shown on the decal (counter-
clockwise). Tighten until secure.
NOTE: The retaining washer must be posi-
tioned with the raised section facing toward the
gearbox.
ASSEMBLY INFORMATION -- WEED
BLADE
WEED
BLADE
NOTE: Remove the trimmer head installing
the weed blade. To remove the trimmer head,
align hole in the dust cup with the hole in the side
of the gearbox by rotating the dust cup. Insert a
small screwdriver into aligned holes. This will
keep the shaft from turning while loosening the
trimmer head. Remove the trimmer head by
turning clockwise. Remove the screwdriver.
See INSTALLATION OF THE TRIMMER
HEAD for illustrations. Be sure to store all parts
and instructions for future use. Never use the
trimmer head with the metal blade installed.
INSTALLATION OF THE METAL
BLADE
WARNING: Wear protective gloves
when handling or performing maintenance on
the blade to avoid injury. The blade is sharp and
can cut you even when it is not moving.

8
WARNING: Do not use any blades, or
fastening hardware other than the washers and
nuts shown in the following illustrations. These
parts must be provided by McCulloch and
installed as shown below. Failure to use proper
parts can cause the blade to fly off and seriously
hurt you or others.
NOTE: The dust cup is located on the gearbox
shaft and not in the parts bag. All other fasten-
ers mentioned in the following assembly steps
are in the parts bag.
1. Install the blade and the retaining washer
over the threaded shaft.
2. Make sure the raised part of the retaining
washer is facing the gearbox and the raised
area fits into the hole in the center of the
blade.
3. Slide the blade and retaining washer onto
the shaft of the gearbox.
4. Place the cupped washer onto the shaft.
Make sure the cupped side of the washer
is toward the blade.
5. Install the blade nut by threading onto the
shaft counterclockwise.
Shield
Blade
Retaining washer
Cupped washer
Nut
Threaded
shaft
Wrench
Dust cup
Gearbox
NOTE: Make sure all parts are in place as il-
lustrated, and the blade is sandwiched between
the dust cup and the retaining washer. There
should be no space between the blade and the
dust cup or the retaining washer.
6. Align hole in dust cup with hole in side of
gearbox by rotating the blade.
7. Insert a small screwdriver into aligned
holes. This will keep the shaft from turning
while tightening the blade nut.
8. Tighten blade nut firmly with a wrench while
holding screwdriver in position.
9. Remove the screwdriver.
10. Turn blade by hand. If the blade binds
against the shield, or appears to be uneven,
the blade is not centered, and you must re-
install.
NOTE: To remove blade, insert screwdriver
into aligned holes. Unthread the nut and remove
parts. Be sure to store parts and instructions for
future use.
ATTACHING THE TRANSPORT
GUARD
NOTE: The transport guard must always be
attached to the blade when the machine is be-
ing transported or in storage.
1. Remove ends of wire retainer from the
clips on the transport guard.
2. Lift wire retainer and position blade in
transport guard.
3. Place wire retainer over blade and insert
both ends of wire retainer back into clips.
Wire retainer Transport
guard
Clip

9
OPERATION
WARNING: Be sure to read the fuel
information in the safety rules before you be-
gin. If you do not understand the safety rules,
do not attempt to fuel your unit. Contact an au-
thorised service dealer.
FUELING ENGINE
WARNING: Remove fuel cap slowly
when refueling.
This engine is certified to operate on unleaded
petrol. Before operation, petrol must be mixed
with a good quality 2--cycle air--cooled engine oil
designed to be mixed at a ratio of 40:1. A 40:1
ratio is obtained by mixing 5 liters of unleaded
petrol with 0,125 liter of oil. DO NOT USE auto-
motive oil or marine oil. These oils will cause en-
gine damage. When mixing fuel, follow instruc-
tions printed on oil container. Once oil is added
to petrol, shake container momentarily to assure
that the fuel is thoroughly mixed. Always read
and follow the safety rules relating to fuel before
fueling your unit.
CAUTION: Never use straight petrol in your
unit. This will cause permanent engine damage.
FUEL REQUIREMENTS
Use good quality unleaded petrol. The lowest
recommended octane grade is 90 (RON).
IMPORTANT
Use of alcohol blended fuels (more than 10% al-
cohol) can cause major engine performance
and durability problems.
WARNING: Incorrect use of fuel and/
or lubricants will cause problems such as:
improper clutch engagements, overheat-
ing, vapor lock, power loss, lubrication defi-
ciency, deterioration of fuel lines, gaskets
and internal carburetor components, etc.
Alcohol blended fuels will cause a high ab-
sorption of moisture in the fuel/oil mixture,
causing the separation of oil and fuel.
HOW TO STOP YOUR UNIT
STo stop the engine, move the ON/STOP
switch to the STOP position.
ON/STOP
Switch
HOW TO START YOUR UNIT
WARNING: Avoid any contact with the
muffler. A hot muffler can cause serious burns.
STARTING A COLD ENGINE (or a
warm engine after running out of fuel)
Starting position
NOTE: The throttle lock--out is designed to
prevent unintentional use of the throttle trig-
ger. The lock--out must be pressed with the
palm of your hand as you grip the throttle han-
dle before the trigger can be used.
1. Set unit on a flat surface.
2. Move ON/STOP switch to the ON posi-
tion.
3. Slowly press the primer bulb 6 times.
4. Move choke lever to FULL CHOKE posi-
tion.
5. Squeeze and hold trigger through all re-
maining steps.
Throttle
lock--out
Primer Bulb
Choke
Lever
Starter
Handle
6. Pull starter rope handle sharply until en-
gine sounds as if it is trying to start, but do
not pull rope more than 6 times.
7. As soon as engine sounds as if it is trying to
start, move choke lever to HALF CHOKE.

10
8. Pull starter rope sharply until engine runs,
but no more than 6 pulls. If the engine
doesn’t start after 6 pulls (at the HALF
CHOKE position), move the choke lever to
the FULL CHOKE position and press the
primer bulb 6 times. Squeeze and hold the
throttle trigger and pull the starter rope 2
more times. Move the choke lever to the
HALF CHOKE position and pull the starter
rope until the engine runs, but no more than
6 pulls. NOTE: If engine still doesn’t start,
it is probably flooded. Proceed to START-
ING A FLOODED ENGINE.
9. Once the engine starts, allow it to run 10
seconds, then move the choke lever to
RUN. Allow the unit to run for 30 more
seconds at RUN before releasing the
throttle trigger. NOTE: If engine dies with
the choke lever in the RUN position, move
the choke lever to the HALF CHOKE
position and pull the rope until engine
runs, but no more than 6 pulls.
STARTING A WARM ENGINE
1. Move ON/STOP switch to the ON posi-
tion.
2. Move the choke lever to the HALF
CHOKE position.
3. Squeeze and hold the throttle trigger.
Keep throttle trigger fully squeezed until
the engine runs smoothly.
4. Pull starter rope sharply until engine runs,
but no more than 5 pulls.
5. Allow engine to run 15 seconds, then move
the choke lever to the RUN position.
NOTE: If engine has not started, pull starter
rope 5 more pulls. If engine still does not run, it
is probably flooded.
STARTING A FLOODED ENGINE
Flooded engines can be started by placing
the choke lever in the RUN position; then, pull
the rope to clear the engine of excess fuel.
This could require pulling the starter handle
many times depending on how badly the unit
is flooded. If the unit still doesn’t start, refer to
TROUBLESHOOTING TABLE.
OPERATING POSITION
A
L
W
A
Y
SWE
A
R:
Hearing
Protection Eye Protection
Heavy,
Long Pants
Boots
Cut from your left to your right.
Sa
f
ety Helmet
When operating unit, clip shoulder strap onto
clamp, stand as shown and check for the fol-
lowing:
SWear eye protection and heavy clothing.
SExtend your left arm and hold handlebar
grip with your left hand.
SHold throttle grip with your right hand with
finger on throttle trigger.
SKeep unit below waist level.
SKeep shoulder strap pad centered on your
left shoulder.
SMaintain full weight of tool on your left
shoulder.
SWithout bending over, keep the blade or
trimmer head near and parallel to the ground
and not crowded into material being cut.
OPERATING INSTRUCTIONS FOR
USE WITH TRIMMER HEAD
WARNING: Always wear eye protec-
tion. Never lean over the trimmer head. Rocks
or debris can ricochet or be thrown into eyes
and face and cause blindness or other serious
injury.
Before trimming, bring engine to a speed suffi-
cient to cut material to be trimmed.
Do not run the engine at a higher speed than
necessary. The cutting line will cut efficiently
when the engine is run at less than full throttle.
At lower speeds, there is less engine noise and
vibration. The cutting line will last longer and will
be less likely to “weld” onto the spool. Always
release the throttle trigger and allow the en-
gine to return to idle speed when not cutting.
To stop engine:
SRelease the throttle trigger.
SMove the ON/STOP switch to the STOP
position.
TRIMMER LINE ADVANCE
Advance line by tapping the bottom of the cut-
ting head lightly on the ground while engine is
running at full speed. The metal line limiter
blade attached to the guard will cut the line to
the proper length.
WARNING: Use only 2,4 mm diame-
ter line. Other sizes of line will not advance
properly and will result in improper cutting
head function or can cause serious injury. Do
not use other materials such as wire, string,
rope, etc. Wire can break off during cutting
and become a dangerous missile that can
cause serious injury.
CUTTING METHODS
WARNING: Use minimum speed and
do not crowd the line when cutting around
hard objects (rock, gravel, fence posts, etc.),
which can damage the trimmer head, become
entangled in the line, or be thrown causing a
serious hazard.
SThe tip of the line does the cutting. You will
achieve the best performance and minimum
line wear by not crowding the line into the
cutting area. The right and wrong ways are
shown below.

11
Right Wrong
Tip o
f
line does
the cutting.
L
ine crowded into
work area.
SThe line will easily remove grass and weeds
from around walls, fences, trees and flower
beds, but it also can cut the tender bark of
trees or shrubs and scar fences.
SFor trimming or scalping, use less than full
throttle to increase line life and decrease head
wear, especially:
SDuring light duty cutting.
SNear objects around which the line can
wrap such as small posts, trees or fence
wire.
SFor mowing or sweeping, use full throttle for a
good clean job.
TRIMMING -- Hold the bottom of the trimmer
head about 8 cm above the ground and at an
angle. Allow only the tip of the line to make
contact. Do not force trimmer line into work
area.
Trimming
8 cm above
ground
SCALPING -- The scalping technique re-
moves unwanted vegetation down to the
ground. Hold the bottom of the trimmer head
about 8 cm above the ground and at an angle.
Allow the tip of the line to strike the ground
around trees, posts, monuments, etc. This
technique increases line wear.
Scalping
MOWING -- Your trimmer is ideal for mowing
in places conventional lawn mowers cannot
reach. In the mowing position, keep the line
parallel to the ground. Avoid pressing the
head into the ground as this can scalp the
ground and damage the tool.
Mowing
SWEEPING -- The fanning action of the rotat-
ing line can be used to blow away loose debris
from an area. Keep the line parallel to and
above the area surface and swing the tool
from side to side.
Sweeping
OPERATING INSTRUCTIONS FOR
USE WITH WEED BLADE
SBlade Thrust is a reaction that only occurs
when using a bladed unit. This reaction can
cause serious injury such as amputation.
Carefully study this section. It is important that
you understand what causes blade thrust,
how you can reduce the chance of its
occurring, and how you can remain in control
of unit if blade thrust occurs.
SWHAT CAUSES BLADE THRUST -- Blade
Thrust can occur when the spinning blade
contacts an object that it does not cut. This
contact causes the blade to stop for an instant
and then suddenly move or “thrust” away
from the object that was hit. The “thrusting”
reaction can be violent enough to cause the
operator to be propelled in any direction and
lose control of the unit. The uncontrolled unit
can cause serious injury if the blade contacts
the operator or others.
SWHEN BLADE THRUST OCCURS --
Blade Thrust can occur without warning if
the blade snags, stalls, or binds. This is
more likely to occur in areas where it is
difficult to see the material being cut. By
using the unit properly, the occurrence of
blade thrust will be reduced and the
operator will be less likely to lose control.
SCut only grass, weeds, and woody brush up
to 1 cm in diameter with the weed blade. Do
not let the blade contact material it cannot cut

12
such as stumps, rocks, fences, metal, etc., or
clusters of hard, woody brush having a
diameter greater than 1 cm.
SKeep the blade sharp. A dull blade is more
likely to snag and thrust.
SCut only at full throttle. The blade will have
maximum cutting power and is less likely to
bind or stall.
S“Feed” the blade deliberately and not too
rapidly. The blade can thrust away if it is fed
too rapidly.
SCut only from your left to your right. Cuttingon
right side of the shield will throw debris away
from the operator.
SUse the shoulder strap and keep a firm grip
on the unit with both hands. A properly
adjusted shoulder strap will support the
weight of the unit, freeing your arms and
hands to control and guide the cutting motion.
SKeep feet comfortably spread apart and
braced for a possible sudden, rapid thrust of
unit. Do not overreach. Keep firm footing and
balance.
SKeep blade below waist level; it will be
easier to maintain control of unit.
SDo not raise the engine above your waist as
the blade can come dangerously close to
your body.
SDo not swing unit with such force that you
are in danger of losing your balance.
Bring the engine to cutting speed before enter-
ing the material to be cut. If the blade does not
turn when you squeeze the throttle trigger, make
sure shaft is fully inserted into the engine.
Always release the throttle trigger and allow
engine to return to idle speed when not cut-
ting. The blade should not turn while the en-
gine is running at idle. If the blade turns at idle,
do not use your unit.
Refer to the CARBURETOR ADJUSTMENT
section or contact your authorised service
dealer.
SMaintain good firm footing while using the
unit. Do this by planting feet firmly in a
comfortable apart position.
SCut while swinging the upper part of your
body from left to right.
SAsyoumoveforwardtothenextareatocut,
be sure to maintain your balance and footing.
Cut using the 2
o’clock to 4 o’clock
position of the
blade
2 o’clock
4 o’clock
RECOMMENDED CUTTING POSITION
WARNING: The operator or others
must not try to clear away cut material with the
engine running or the blade turning to avoid seri-
ous injury. Stop engine and blade before remov-
ing materials wrapped around blade or shaft.
MAINTENANCE
The life span of the machine can be reduced
and the risk of accidents can increase if ma-
chine maintenance is not carried out correctly
and if service and/or repairs are not carried
out professionally. If you need further infor-
mation, please contact your nearest autho-
rised service dealer.
WARNING: Disconnect the spark
plug before performing maintenance except
for carburetor adjustments.
CHECK FOR LOOSE
FASTENERS AND PARTS
SSpark Plug Boot
SAir Filter
SHousing Screws
SHandlebar Screws
SCombination Shield
CHECK FOR DAMAGED OR
WORN PARTS
Contact an authorised service dealer for re-
placement of damaged or worn parts.
SON/STOP Switch -- Ensure ON/STOP switch
functions properly by moving the switch to the
STOP position. Make sure engine stops; then
restart engine and continue.
SFuel Tank -- Discontinue use of unit if fuel
tank shows signs of damage or leaks.
SCombination Shield -- Discontinue use of
unit if debris shield is damaged.
INSPECT AND CLEAN UNIT AND
LABELS
SAfter each use, inspect complete unit for
loose or damaged parts. Clean the unit and
labels using a damp cloth with a mild deter-
gent.
SWipe off unit with a clean dry cloth.
CLEAN AIR FILTER
A dirty air filter decreases engine perform-
ance and increases fuel consumption and
harmful emissions. Always clean after every
5 hours of operation.
1. Clean the cover and the area around it to
keep dirt from falling into the carburetor
chamber when the cover is removed.
2. Remove parts as illustrated.
NOTE: Do not clean filter in petrol or other
flammable solvent to avoid creating a fire haz-
ard or producing harmful evaporative emis-
sions.
3. Wash the filter in soap and water.
4. Allow filter to dry.
5. Replace parts.

13
Button
Air Filter Cover
Air Filter
REPLACE SPARK PLUG
Replace the spark plug each year to ensure
the engine starts easier and runs better. Set
spark plug gap at 0,6 mm. Ignition timing is
fixed and nonadjustable.
1. Twist, then pull off spark plug boot.
2. Remove spark plug from cylinder and dis-
card.
3. Replace with Champion RCJ-6Y spark
plug and tighten securely with a 19 mm
socket wrench.
4. Reinstall the spark plug boot.
SERVICE AND ADJUSTMENTS
REPLACING THE LINE
1. Press the tabs on the side of the trimmer
head and remove cover and spool.
Tab
Tab
Cover
Spool
2. Remove any remaining line.
3. Clean dirt and debris from all parts. Re-
place spool if it is worn or damaged.
4. Replace with a pre-wound spool, or re-
place line using a 4,5 meters length of 2,4
mm diameter McCulloch brand line.
WARNING: Never use wire, rope,
string, etc., which can break offand becomea
dangerous missile.
5. When installing new line on an existing
spool, hold the spool as shown.
6. Bend the line at the midpoint and insert
the bend into the slot in the center rim of
the spool. Ensure line snaps into position
in the slot.
Slot
7. With your finger between the lines, wrap
the lines evenly and firmly around the
spool in a clockwise direction.

14
8. Position the lines in the guide slots.
Guide slot
Guide slot
9. Place the spool in the cover as shown
below.
10. Insert the ends of the lines through exit
holes in the sides of the cover.
Line exit hole
Cover
11. Reinstall the spool and cover onto the
trimmer head. Push until cover snaps into
place.
BLADE REPLACEMENT
Refer to the ASSEMBLY section for blade re-
placement instructions and illustrations.
CARBURETOR ADJUSTMENT
WARNING: Keep others away when
making idle speed adjustments. The trimmer
head will be spinning during most of this pro-
cedure. Wear your protective equipment and
observe all safety precautions. After making
adjustments, the trimmer head must not
move/spin at idle speed.
The carburetor has been carefully set at the
factory. Adjustments may be necessary if you
notice any of the following conditions:
SEngine will not idle when the throttle is re-
leased.
SThe trimmer head moves/spins at idle speed.
Make adjustments with the unit supported so
the cutting attachment is off the ground and
will not make contact with any object. Hold
the unit by hand while running and making ad-
justments. Keep all parts of your body away
from the cutting attachment and muffler.
Idle Speed Adjustment
Allow engine to idle. Adjust speed until engine
runs without trimmer head moving or spinning
(idle speed too fast) or engine stalling (idle
speed too slow).
STurn idle speed screw clockwise to in-
crease engine speed if engine stalls or dies.
STurn idle speed screw counterclockwise to
decrease engine speed if trimmer head
moves or spins at idle speed.
WARNING: Recheck the idle speed
after each adjustment. The trimmer head
must not move or spin at idle speed to avoid
serious injury to the operator or others.

15
Idle Speed Screw
Air Filter Cover
If you require further assistance or are unsure
about performing this procedure, contact an
authorised service dealer.
STORAGE
WARNING: Perform the following
steps after each use:
SAllow engine to cool before storing or trans-
porting.
SStore unit and fuel in a well ventilated area
where fuel vapors cannot reach sparks or
open flames from water heaters, electric
motors or switches, furnaces, etc.
SEmpty fuel tank before storing or transport-
ing the unit.
SStore unit and fuel well out of the reach of
children.
SStore unit with all guards in place. Position
unit so that any sharp object cannot acci-
dentally cause injury.
SEASONAL STORAGE
Prepare unit for storage at end of season or if
it will not be used for 30 days or more.
If your unit is to be stored for a period of time:
SClean the entire unit before lengthy storage.
SStore in a clean dry area.
SLightly oil external metal surfaces.
ENGINE
SRemove spark plug and pour 1 teaspoon of
40:1, 2-cycle engine oil (air cooled) through
the spark plug opening. Slowly pull the
starter rope 8 to 10 times to distribute oil.
SReplace spark plug with new one of recom-
mended type and heat range.
SClean air filter.
SCheck entire unit for loose screws, nuts,
and bolts. Replace any damaged, broken,
or worn parts.
SAt the beginning of the next season, use
only fresh fuel having the proper petrol to oil
ratio.
OTHER
SDo not store petrol from one season to
another.
SReplace your petrol can if it starts to rust.

16
TROUBLE CAUSE REMEDY
Engine will not
start. 1. ON/STOP switch in STOP
position.
2. Engine flooded.
3. Fuel tank empty.
4. Spark plug not firing.
5. Fuel not reaching
carburetor.
6. Carburetor requires
adjustment.
1.MoveON/STOPswitchtoON
position.
2. See “Starting a Flooded Engine” in
Operation Section.
3. Fill tank with correct fuel mixture.
4. Install new spark plug.
5. Check for dirty fuel filter; replace.
Check for kinked or split fuel line;
repair or replace.
6. Contact an authorised service dealer.
Engine will
not idle
properly.
1. Carburetor requires
adjustment.
2. Crankshaft seals worn.
3. Compression low.
1. See “Carburetor Adjustment” in
Service and Adjustments Section.
2. Contact an authorised service dealer.
3. Contact an authorised service dealer.
1. Air filter dirty.
2. Spark plug fouled.
3. Carburetor requires
adjustment.
4. Carbon build-up on
muffler outlet screen.
5. Compression low.
Engine will not
accelerate,
lacks power,
or dies under
a load.
1. Clean or replace air filter.
2. Clean or replace plug
and regap.
3. Contact an authorised service dealer.
4. Contact an authorised service dealer.
5. Contact an authorised service dealer.
Engine
smokes
excessively.
1. Choke partially on.
2. Fuel mixture incorrect.
3. Air filter dirty.
4. Carburetor requires
adjustment.
1. Adjust choke.
2. Empty fuel tank and refill with
correct fuel mixture.
3. Clean or replace air filter.
4. Contact an authorised service dealer.
Engine runs
hot. 1. Fuel mixture incorrect.
2. Spark plug incorrect.
3. Carburetor requires
adjustment.
4. Carbon build-up on
muffler outlet screen.
1. Empty fuel tank and refill with
correct fuel mixture.
2. Replace with correct spark plug.
3. Contact an authorised service dealer.
4. Contact an authorised service dealer.
WARNING: Always stop unit and disconnect spark plug before performing all of the
recommended remedies below except remedies that require operation of the unit.
TROUBLESHOOTING TABLE

17
DECLARATION OF CONFORMITY
EC Declaration of Conformity (Only applies to Europe)
We, Husqvarna AB, SE-561 82 Huskvarna, Sweden, tel: [phone], as authorised
representative in the Community, declare that the brushcutter model McCulloch Mac 250 L
with serial numbers dating from 2009 and onwards (the year is clearly stated on the rating
plate, followed by the serial number), comply with the requirements of the COUNCIL’S
DIRECTIVES:
of 17 May 2006 “relating to machinery” 2006/42/EC;
of 15 December 2004 “relating to electromagnetic compatibility” 2004/108/EC, and applicable
supplements; and
of 8 May 2000 “relating to the noise emissions in the environment” in accordance with Annex
Vof2000/14/EC. For information relating to noise emissions, see Technical data section.
The following standards have been applied: EN ISO 12100-1/A1:2009, EN ISO
12100-2/A1:2009, CISPR 12:2007, EN 11806:2008.
SMP, The Swedish Machinery Testing Institute, Fyrisborgsgatan 3 S--754 50 Uppsala,
Sweden, has performed voluntary type examination on behalf of Husqvarna AB. The
certificate(s) are numbered: SEC/09/2026.
0 9 -- 11 -- 0 1
Ronnie E. Goldman, Director of Engineering
Authorized representative for Husqvarna AB and
responsible for technical documentation

18
TECHNICAL DATA SHEET
MODEL: Mac 250 L
ENGINE
Cylinder displacement, cm325
At maximum engine power, rpm 8000
Maximum rotational frequency of the spindle 10000
Engine speed at recommended maximum spindle
rotational frequency 7400
Recommended speed idling, rpm 3000
Maximum engine power, measured in
accordance with ISO 8893, kW 0,7
Catalytic converter muffler Yes
IGNITION SYSTEM
Spark plug Champion RCJ--6Y
Electrode gap, mm 0,6
FUEL AND LUBRICATION SYSTEM
Fuel tank capacity, cm3340
WEIGHT
Weight without fuel, cutting attachment and guard, kg 3,7
NOISE EMISSIONS
(see Note 1)
Sound power level, measured dB(A) 108,7
Sound power level, guaranteed LWA dB(A) 114,0
NOISE LEVELS
(see Note 2)
Equivalent sound pressure level at the operators’ ear,
measured according to EN/ISO 11806 and ISO 22868, dB(A)
Equipped with grass blade (original) 101,0
Equipped with trimmer head (original) 98,0
VIBRATION LEVELS
(see Note 3)
Equivalent vibration levels (ahv,eq) at handles, measured
according to EN ISO 11806 and ISO 22867, m/s2
Equipped with grass blade (original), left/right 5,7/6,2
Equipped with trimmer head (original), left/right 9,3/4,8
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.
Model Mac 250 L (3/8 LH arbor shaft thread)
Centre hole in blades/cutters, ∅25,4 mm
Approved accessories Type Cutting attachment /guard, part. no.
Grass blade/grass cutter Grass (∅20 cm, 4--teeth) 530 05 58 92 / 575 35 27 01
Trimmer head TNG7 (∅2,4 mm line) 537 41 92--02 / 575 35 27 01