McCulloch 250 B User Manual

INSTRUCTION MANUAL

IMPORTANT INFORMATION

GB

sure you understand them before using this unit. Retain these instructions for future
reference.

: Please read these instructions carefully and make

MANUEL D’INSTRUCTIONS

RENSEIGNEMENTS IMPORTANTS:

FR

atentivement les instructions et assurez- -vous de les avoir comprises. Conservez
les instructions pour référence ultérieure.

Avant d’utiliser cet appareil, veuillez lire

BETRIEBSANWEISUNG

WICHTIGE INFORMA TI ON:

DE

Geräts aufmerksam durch. Verwenden Sie es erst, wenn Sie sicher sind, daß Sie
alle Anweisungen verstanden haben und gut aufbewahren.

Lesen Sie diese Hinweise zur Handhabung des

MANUAL DE INST RU CCIONES

INFORMACIÓN IMPORTANTE:

ES

asegúrese de entenderlas antes de utilizar esta aparato. Conserve las instruc­ciones para la referencia en el futuro.

Lea atentamente las instrucciones y

545154243 Rev. 4 3/5/08 BRW

IDENTIFICATION (WHAT IS WHAT?)

3

7

8

9

12

10

14

13

19

5

4

2

1

9

11

22

20

21

1. Fuel tank

2. Handlebar

3. ON/STOP switch

4. Throttle cable clip

5. Shoulder harness clamp

6. Shoulder harness

7. Trimmer head

8. Line limiter blade

9. Shield

10. Shaft

11. Blade

12. Throttle trigger

17

18

6

16

15

23

13. Throttle lock--out

14. Start throttle button

15. Starter handle

16. Fuel cap

17. Primer bulb

18. Choke lever

19. Muffler

20. Wrench

21. Hex wrench

22. Transport guard

23. Instruction manual

2

IDENTIFICATION OF SYMBOLS

A.

D.

F.

I.

B.

C.

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. Handlebar 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

E.

G.

H.

J.

K.

SAFETY RULES

WARNING: When using gardening

appliances, basic safety precautions should al­ways 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 op­erator and others. The warnings and safety
instructions inthis manualmust befollowed 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 in­struction manual before assembling and us­ing the unit! Restrict theuse of thisunit to per­sons who read, understand, and follow the
warnings and instructions in this manual and
on the unit. Never allow children to operate
this 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.

SAFETY INFORMATION
ON THE UNIT

3

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/Trimmerline 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.

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

S Dress properly. Always wear safety

glasses or similar eye protection when op­erating, or performing maintenance, on
your unit (safety glasses are available).
Eye protection should be marked Z87.

S Always wear a helmet if the trees to be

cleared are taller than 2 meters.

S Always wear face or dust mask if operation

is dusty.

S Always wear heavy, long pants, long

sleeves, boots,and gloves. Wearing safety
leg guards is recommended.

S Always wear foot protection. Do not go

barefoot or wear sandals. Stay clear of
blade/spinning line.

S Secure 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.

S Being fully covered also helps protect you

from debris and pieces of toxic plants
thrown by spinning line.

S Stay alert. Do not operate this unit when you

are tired, ill, upset or under the influence of al­cohol, drugs, or medication. Watch what you
are doing; use common sense.

S Wear hearing protection. Long or continu-

ous exposure to high noise levels may
cause permanent hearing impairment.

S 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 theskin.
Remember the risk of fire!

S Never start or run inside a closed room or

building. Breathing exhaust fumes can kill.

S Keep handles free of oil and fuel.
S Always use the handlebar and a properly

adjusted shoulder harness with a blade
(see ASSEMBLY).

UNIT / MAINTENANCE SAFETY

WARNING: Stop unitand disconnect

the spark plug before performing mainte­nance (except carburetor adjustments).
S Throw 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.

S Maintain unit according to recommended

procedures. Keep blade sharp. Keep cut­ting line at the proper length.

S Use only 2,4 mm diameter McCulloch

brand replacement line. Never use wire,
rope, string, etc.

S Install required shield properly before using

theunit.Usethemetalshieldforallmetal
blade use. Use the plastic shield for all line
trimmer use.

S Use only specified blade or trimmer head;

make sure it is properly installed and se­curely fastened.

S Never start engine with clutch shroud re-

moved. Theclutch can fly off and cause se­rious injury.

S Be sure blade ortrimmer headstops turning

when engine idles.

S Make carburetor adjustments with the low-

er end supported to prevent blade or trim­mer line from contacting any object. Hold

4

unit by hand; do not use the shoulder har­ness for support.

S Keep others awaywhen makingcarbure-

tor adjustments.

S Use only recommended McCulloch accesso-

ries and replacement parts.

S Have all maintenance and service not ex-

plained in this manual performed by your au­thorised service dealer.

FUEL SAFETY

S Mix and pour fuel outdoors.
S Keep away from sparks or flames.
S Use a container approved for fuel.
S Do not smoke or allow smoking near fuelor

the unit.

S Avoid spilling fuel or oil. Wipe up all fuel spills.
S Move at least 3 meters away from fueling

site before starting engine.

S Stop engine and allow to cool before re-

moving fuel cap.

S Always store petrolin acontainer approved

for flammable liquids.

CUTTING SAFETY

WARNING: Inspect thearea tobe 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.
S Keep others including children, animals,

bystanders, and helpers at least 50 feet(15
meters) away. Stop engine immediately if
you are approached.

S Always keep engine onthe right--hand side

of your body.

S Hold the unit firmly with both hands.
S Keep firm footing and balance. Do not

overreach.

S Keep blade or trimmer head below waist

level. Do not raise engine above your waist.

S Keep all parts of your body away from blade,

trimmer head, and muffler when engine is
running. A hot muffler can cause serious
burns.

S Cut from your left to your right. Cutting on

right side of the shield will throw debris
away from the operator.

S Use only in daylight or good artificial light.
S Use only for jobs explained in this manual.

TRANSPORTING AND STORAGE

S Allow the engineto cool; secure unit before

storing or transporting in vehicle.

S Empty 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.

S Store unit andfuel inan area where fuelva-

pors cannot reach sparks or open flames
from water heaters, electric motors or
switches, furnaces, etc.

S Store unitso line limiter cannot accidentally

cause injury. Unit can behung by the shaft.

S Always install transport guard on blade be-

fore transporting or strorage.

S Store the unit out of the reach of children.

SPECIAL NOTICE: Exposure to vibrations

through prolonged use of petrol powered 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 damage in otherwise
healthy people. If symptoms occur such as
numbness, pain, loss of strength, change inskin
color or texture, or loss of feeling in the fingers,
hands, or joints, discontinue the use of this tool
and seek medical attention. An anti-vibration
system does not guarantee the avoidance of
these problems. Users who operate power tools
on a continual and regular basis must monitor
closely their physical condition and the condition
of this tool.

ASSEMBLY

CARTON CONTENTS

Check carton contents against the following list:

S Brushcutter
S Blade shield
S Blade shield screws (4)
S Blade
S Cupped washer
S Large nut for installing blade
S Trimmer head
S Plastic shield
S Nut(screwedontoplasticshield)
S Handlebar
S Hand lebar brack et cover
S Hand lebar brack et cover scr ews (2)
S Upper shoulder harness clamp
S Lower shoulder harness clamp
S Shoulder harness clamp screws (2)
S Shoulder harness
S Hex wrench
S Wrench
S Transport guard
S Throttlecableclip

WARNING: Always stop unitand dis-

connect spark plugbefore performing any as­sembly procedures.

WARNING: If received assembled,

repeat allsteps to ensure your unit is properly
assembled and all fasteners are secure.
Examine parts for damage. Do not use dam­aged parts.
It is normal for the fuel filter to rattle in the
empty fuel tank.
Finding fuel or oil residue onmuffler is normal
due to carburetor adjustments and testing
done by the manufacturer.

TOOLS REQUIRED

S Hex wrench (provided)
S Adjustable wrench
S Phillips screwdriver

5

ATTACHING THE HANDLEBAR

DANGER: To avoid serious injury, the

barrier portion ofthe handlebar must beinstalled
as shown to provide a barrier between operator
and the spinning blade.

1. Remove the screw at the rear of the
throttle handle.

2. Slide the throttle handleonto the right side
of the handlebar (see illustration).

3. Align the screw hole inthe throttle handle
with the hole in the handlebar.

4. Refit the screw inthe hole inthe rearof the
throttle handle.

5. Screw the screw through the handle and
handlebar. Tighten the screw.

6. Fit the mounting components as shown.

2. Position the lower shoulder harness
clamp under theshaft and align the upper
and lower clamp screw holes. Clamp
must befittle above the arrow on the shaft
(see illustration above).

NOTE: Fit throttle wire in groove of lower

harness clamp before tightening screws.

3. Insert two screws into the screw holes.

4. Secure shoulder harness clamp by tight­ening screws with a hex wrench.

SHOULDER HARNESS
ADJUSTMENT

At the front of the shoulder harness is an easily
accessible quick release. Use the quick release
in any emergency situation that requires you to
free yourself from the machine and harness.

1. Put onthe harness. Adjust the harness for
the best working position.

2. Tension theside straps so that theweight
is evenly distributed across both shoul­ders.

7. The handlebar mounting must be fitted
between the arrows on the shaft.

8. Tighten the screws with a hex wrench.

ASSEMBLY OF SHOULDER
HARNESS

WARNING: When using a brushcut-

ter, it must always be hooked securely to the
shoulder harness. Otherwise, you will be un­able to safely control the brushcutter. This
can result in injury to yourself or others.
Proper shoulder harness and handlebar adjust­ments must be made with the engine complete­ly stopped before using unit. A well- -adjusted
shoulder harness and machine makes work
much easier.

ATTACHING SHOULDER HARNESS
CLAMP

1. Place the upper shoulder harness clamp
over the shaft.

NOTE: It may be necessary to relocate the

shoulder harness clampon theshaft for prop­er balancing of unit.

SHOULDER HARNESS

ADJUSTMENT

FOR BALANCE

15 cm

6

below
waist

76 cm

10 -- 30 cm

above

ground

76 cm

3. Pivot shield until bolt passes through hole
in bracket.

4. Reinstall nut and tighten securely with
wrench (provided).

NOTE: If your unit has a plastic cover over

the threadson thethreaded shaft, remove the
covering to expose thethreads. Beforeinstal­ling thetrimmer head,make sure the dust cup
and retaining washer are positioned on the
gearbox as shown below.

Bracket

Slot

Nut

CONFIGURING YOUR UNIT

Youcan configure your unit using acutting 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 sec­tion for the desired configuration and follow the
instructions.

ASSEMBLY INFORMATION -­TRIMMER HEAD

TRIMMER
HEAD

NOTE: Remove the blade and metalshield be-

fore attaching the plastic shield and trimmer
head. To rem ove blade, align hole in the dust
cup with thehole in the side ofthe gearbox by
rotating the blade. Insert a small screwdriver
into alignedholes. Thiswillkeep the shaft from
turning while loosening the blade nut. Remove
blade nut by turning clockwise. Remove the
screwdriver. Remove both washers and blade.
T o remove metal shield, loosen and remove the
four mounting screws. See ATTACHING THE
METAL SHIELD and INSTALLATION OF THE
METAL BLADE forillustrations. Be sure to store
all parts and instructions for future use.

ATTACHING THE PLASTIC SHIELD
ANDTRIMMERHEAD

WARNING: The shield must be prop-

erly installed. The shield provides partial
protection to theoperator and others from the
risk of thrown objects, and is equipped with a
line limiterblade which cuts excess lineto the
proper length. The line limiter blade (on un­derside of shield) is sharp and can cut you.

1. Remove nut from shield.

2. Insert bracket into slot on shield.

Shield

NOTE: Make sure all parts are properly

installed as shown in the illustration before
installing the trimmer head.

5. Align hole in thedust cup with thehole in the

6. Insert a small screwdriver into aligned

Screwdriver

7. While holding the screwdriver in position,

NOTE: The retaining washer must be posi-

tioned with the raised section facing toward the
gearbox.

Gearbox

Dust Cup

Retaining Washer

side of thegearbox by rotating the dust cup.

holes. This will keep the shaft from turning
while tightening trimmer head.

thread trimmer head onto the shaft in the
direction shown on the decal (counter­clockwise). Tighten until secure.

ASSEMBLY INFORMATION -- WEED
BLADE

WEED
BLADE

7

NOTE: Remove the trimmer head and plastic

shield before attaching the metal shield and
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. To remove the plastic shield, loosen and
remove nut. Pivot shield to release bracket from
slot. See INSTALLATION OF THE CUTTING
HEAD and ATT ACHING THE PLASTIC
SHIELD for illustrations. Be sure to store all
parts and instructions for future use. Never use
the trimmer head with the metal blade installed.

ATTACHING THE METAL SHIELD

WARNING: The metal shield must be

properly installed on the tool anytime the tool is
used with a blade. Failure to install the shield in
the position shown can result in serious injury to
the operator. The length of the shield must be
aligned with the length of the shaft.

1. Place the metal shield under the gearbox,
and align the screw holes.

1. Remove the retaining washer from the
threaded shaft of the gearbox. Leave the
dustcupontheshaft.

2. Install the blade and the retaining washer
over the threaded shaft.

3. 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.

4. Slide the blade and retaining washer onto
the shaft of the gearbox.

5. Place the cupped washer onto the shaft.
Make sure the cupped side of the washer
is toward the blade.

6. Install the blade nut by threading onto the
shaft counterclockwise.

Gearbox

Shield

Dust Cup

Threaded Shaft

Gearbox

Shield

2. Insert and thread the 4 mounting screws
through the holes of the gearbox and the
metal shield. Tightenevenly and securely
with the hex wrench provided.

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.

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 andseriously
hurt you or others.

NOTE: The dust cup and retaining washer are

located on the gearbox shaft and notin the parts
bag. All other fasteners mentioned inthe follow­ing assembly steps are in the parts bag.

Retaining
Washer

Cupped
Washer

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.

7. Align hole in dust cup with hole in side of
gearbox by rotating the blade.

8. Insert a small screwdriver into aligned
holes. This will keep the shaft from turning
while tightening the blade nut.

Screwdriver

9. Tighten blade nut firmly with a wrench while
holding screwdriver in position.

10. Remove the screwdriver.

11. Turn blade by hand. If the blade binds
against the shield, or appears to be uneven,
the blade is not centered, and you must re­install.

NOTE: T o remove blade, insert screwdriver

into aligned holes. Unthread the nut and remove
parts. Be sure to store parts andinstructions for
future use.

8

Blade

Nut

OPERATION

WARNING: Be sure to read the fuel

information in the safety rules before you be­gin. If you do not understand the safety rules,
do not attemptto fuelyour unit.Contact anau­thorised 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.
We recommend McCulloch brand oil mixed ata
ratio of 40:1 (2.5%). A 40:1 ratio is obtained by
mixing 5 liters of unleaded petrol with 0,125 liter
of oil. DO NOT USE automotive oil or boat oil.
These oils will cause engine damage. When
mixing fuel, follow instructions 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.

IMPORTANT

Experience indicates that alcohol blended fuels
(called gasohol or using ethanol or methanol)
can attract moisture which leads to separation
and formation of acids during storage. Acidic
gas can damage the fuel system of an engine
while in storage. To avoid engine problems,
empty the fuel system before storage for 30
days or longer. Drain the gas tank, start the en­gine and let it run until the fuel lines andcarbure­tor are empty. Use fresh fuel next season. Nev­er use engine or carburetor cleaner products in
the fuel tank or permanent damage may occur.

ST ARTI NG 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 trig­ger. The lock--out must be pressed with the
palm of your handas you grip the throttle han­dle before the trigger can be used.

1. Set unit on a flat surface.

2. Move ON/STOP switch to the ON position.

3. Slowly press the primer bulb 6 times.

4. Move choke lever to FULL CHOKE posi­tion.

Primer Bulb

Choke
Lever

HOW TO STOP YOUR UNIT

S To 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.

Starter
Handle

5. Set the throttle to the start position by first
pressing the throttle lock--out and the
throttle trigger, then pressing the start
throttle button. Then release the throttle
lock--out and the throttle trigger, followed
by the start throttle button. The throttle
function is now activated.

NOTE: The start throttle button should stay

depressed, holding the throttle open. If not, re­peat step 5. To return the engine to idle, press
the throttle lock--out and throttle trigger again.

9

Start throttle
button

Throttle

Throttle
trigger

6. Pull starter rope handle sharply until en­gine 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.

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. 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

NOTE: If engine still doesn’t start,

6 pulls.
it is probably flooded. Proceed to START­ING 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.
the choke lever in theRUN 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 position.

2. Move the choke lever to the HALF
CHOKE position.

3. Set the throttle tothe startposition by acti­vating the start throttle button (see step 5
under STARTING A COLD ENGINE).

4. Pull starter rope sharply until engine runs,
but no more than 5 pulls.

5. Allow engine t o run 15 seconds, then move
the choke lever to the RUN position.

NOTE: If engine has not started, pull starter

rope 5more pulls. If enginestill 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. Fully
squeeze throttle trigger; then, pull the rope to
clear the engineof 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.

NOTE: If enginedies with

lock--out

OPERATING POSITION

ALWAYS WEAR:

Hearing
Protection

Heavy,
Long Pants

Boots

Cut from your left to your right.

When operating unit, clip shoulder harness
onto clamp,stand asshown and check forthe
following:

S Wear eye protection and heavy clothing.
S Extend your left arm and hold handlebar

grip with your left hand.

S Hold throttle grip with your right hand with

finger on throttle trigger.

S Keep unit below waist level.
S Maintain full weight of tool on both shoulders.
S Without bending over, keep the blade or

trimmer head near and parallel to the ground
and not crowded into material being cut.

Safety Helmet

Eye Protection

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 engineto a speed suffi­cient 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 engine to return to idle speed when not
cutting.
To stop engine:

S Release the throttle trigger.
S Move the ON/ST O P switch to the STOP

position.

TRIMMER LINE ADVANCE

Advance line by tapping the bottom of the cut­ting head lightly on the groundwhile engineis
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 diameter

line. Other sizes of linewill not advance properly
and 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.

10

CUTTING METHODS

f

L

WARNING: Use minimumspeed and

do not crowd the line when cutting around
hard objects (rock, gravel, fence posts, etc.),
which candamage the trimmer head, become
entangled in the line, or be thrown causing a
serious hazard.
S The 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.

line does

Tip o
the cutting.

ine crowded into

work area.

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

Right

S The 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.

S For trimming or scalping, use less than full

throttle to increase linelife and decrease head
wear, especially:

S During light duty cutting.
S Near objects around which the line can

wrap such as small posts, trees or fence
wire.

S For 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 re­moves unwanted vegetation down to the
ground. Hold the bottom of the trimmer head
about 8cm abovethe groundand at an angle.
Allow the tip of the line to strike the ground
around trees, posts, monuments, etc. This
technique increases line wear.

Wrong

SWEEPING -- Thefanning action of the rotat­ing line canbe used to blowaway 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

S Blade 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 importantthat
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.

S WHAT 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 aninstant
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

11

can cause serious injury if the blade contacts

the operator or others.

S WHEN 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.

S Cut 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

such as stumps, rocks, fences, metal, etc., or

clusters of hard, woody brush having a

diameter greater than 1 cm.
S Keep the blade sharp. A dull blade is more

likely to snag and thrust.
S Cut 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.
S Cut only from your leftto your right. Cutting on

right side of the shield will throw debris away

from the operator.
S Use the shoulder harness and keep a firm

grip on the unit with both hands. A properly

adjusted shoulder harness will support the

weight of the unit, freeing your arms and

hands to control and guidethe cutting motion.
S Keep feet comfortably spread apart and

braced for a possible sudden, rapid thrust of

unit. Do not overreach. Keep firm footing and
balance.

S Keep blade below waist level; it will be

easier to maintain control of unit.

S Do notraise theengine aboveyour waist as

the blade can come dangerously close to
your body.

S Do not swing unit with such force that you

are in danger of losing your balance.
Bring the engine to cutting speed before enter­ing the material to be cut. If the blade does not
turn whenyou 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 cut­ting. The blade should not turn while the en­gine isrunning atidle. Ifthe bladeturns atidle,
do not use your unit. Refer to the CARBURE­TOR ADJUSTMENT section or contact your
authorised service dealer.
S Maintain good firm footing while using the

unit. Do this by planting feet firmly in a

comfortable apart position.
S Cut while swinging the upper part of your

body from left to right.
S Asyoumoveforwardtothenextareatocut,

be sure to maintain your balance and footing.

RECOMMENDED CUTTING POSITION

Cut using the 2
o’clock to 4 o’clock
position of the
blade

2 o’clock

4 o’clock

WARNING: The operator or others

must not try to clear away cut materialwith the
engine running or the blade turning to avoid
serious injury. Stop engine and blade before
removing materials wrapped around blade or
shaft.

MAINTENANCE

The life span of the machine can be reduced
and the risk of accidents can increase if ma­chine maintenanceis not carried outcorrectly
and if service and/or repairs are not carried
out professionally. If you need further infor­mation, please contact your nearest autho­rised service dealer.

WARNING: Disconnect the spark

plug before performing maintenance except
for carburetor adjustments.

CHECK FOR LOOSE
FASTENERS AND PARTS

S Spark Plug Boot
S Air Filter
S Housing Screws
S Handlebar Screws
S Debris Shield

CHECK FOR DAMAGED OR
WORN PARTS

Contact an authorised service dealer for re­placement of damaged or worn parts.
S ON/STOP Switch - - Ensure ON/STOP switch

functions properly by moving the switch tothe

STOP position. Make sure engine stops; then

restart engine and continue.
S Fuel Tank -- Discontinue use of unit if fuel

tank shows signs of damage or leaks.
S Debris Shield -- Discontinue use of unit if

debris shield is damaged.

INSPECT AND CLEAN UNIT AND
LABELS

S After each use, inspect complete unit for

loose or damaged parts. Clean the unit and

labels using a damp cloth with a mild deter-

gent.
S Wipe off unit with a clean dry cloth.

12

CLEAN AIR FILTER

A dirty air filter decreases engine perform­ance 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 firehaz­ard or producing harmful evaporative emis­sions.

3. Wash the filter in soap and water.

4. Allow filter to dry.

5. Replace parts.

Button

Air Filter

Air Filter Cover

SERVICE AND ADJUSTMENTS

REPLACING THE LINE

1. Press the tabs on the side of the trimmer
head and remove cover and spool.

Cover
Tab

Tap Bu t to n

2. Remove any remaining line.

3. Clean dirt and debris from all parts. Re­place spool if it is worn or damaged.

4. Replace with a pre-wound spool, or re­place line using a 4,5 meters length of2,4
mm diameter McCulloch brand line.

5. When installing new line on an existing
spool, hold the spool as shown in the il­lustration below.

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

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 anddis­card.

3. Replace with Champion RCJ-6Y spark
plug and tighten securely with a 19 mm
socket wrench.

4. Reinstall the spark plug boot.

7. With your finger between the lines, wrap
the lines evenly and firmly around the
spool in a clockwise direction.

8. Position the lines in the guide slots.

Guide Slot

Guide

Slot

9. Insert the ends of the lines through exit
holes in the sides of the cover.

10. Place the spool in the cover.

Spool

13

Spool

Cover

11. Make sure the lines are not caught be­tween the rim of the spool and the wall of
the cover.

12. Reinstall the spool and cover onto the
trimmer head.Push until cover snaps into
place.

BLADE REPLACEMENT

Refer to theASSEMBLYsection for bladere­placement instructions and illustrations.

CARBURETOR ADJUSTMENT

WARNING: Keep others away when

making idle speed adjustments. The trimmer
head will be spinning during most of this pro­cedure. 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 ifyou
notice any of the following conditions:

S Engine will not idle when the throttle is re-

leased.

S The 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 anyobject. Holdthe
unit byhand whilerunning andmaking adjust­ments. Keep allparts ofyour body away from
the cutting attachment and muffler.

Idle Speed Adjustment

Allow engineto idle.Adjust speed until engine
runs without trimmer headmoving orspinning
(idle speed too fast) or engine stalling (idle
speed too slow).

S Turn idle speed screw clockwise to in-

crease enginespeed if enginestalls or dies.

S Turn 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.

Idle Speed Screw

Air Filter Cover

If yourequire further assistance or areunsure
about performing this procedure, contact an
authorised service dealer.

STORAGE

WARNING: Perform the following

steps after each use:
S Allow engineto coolbefore storing ortrans-

porting.

S Store 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.

S Empty fuel tank before storing or transport-

ing the unit.

S Store unit and fuel well out of the reach of

children.

S Store unit with all guards in place. Position

unit so that any sharp object cannot acci­dentally cause injury.

SEASONAL STORAGE

Prepare unit forstorage at end of season or if
it will not be used for 30 days or more.
If your unit is tobe stored for a period of time:

S Clean the entire unit before lengthy storage.
S Store in a clean dry area.
S Lightly oil external metal surfaces.

ENGINE

S Remove spark plug and pour 1teaspoon 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.

S Replace spark plugwith new oneof recom-

mended type and heat range.

S Clean air filter.
S Check entire unit for loose screws, nuts,

and bolts. Replace any damaged, broken,
or worn parts.

S At the beginning of the next season, use

only fresh fuel having the proper petrolto oil
ratio.

OTHER

S Do not store petrol from one season to

another.

S Replace your petrol can if it starts to rust.

14

TROUBLESHOOTING TABLE

WARNING: Always stopunit anddisconnect spark plugbefore performingall of the

recommended remedies below except remedies that require operation of the unit.

TROUBLE CAUSE REMEDY

Engine will not
start.

Engine will
not idle
properly.

Engine will not
accelerate,
lacks power,
or dies under
a load.

Engine
smokes
excessively.

Engine runs
hot.

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. Carburetor requires
adjustment.

2. Crankshaft seals worn.

3. Compression low.

1. Air filter dirty.

2. Spark plug fouled.

3. Carburetor requires
adjustment.

4. Carbon build-up on
muffler outlet screen.

5. Compression low.

1. Choke partially on.

2. Fuel mixture incorrect.

3. Air filter dirty.

4. Carburetor requires
adjustment.

1. Fuel mixture incorrect.

2. Spark plug incorrect.

3. Carburetor requires
adjustment.

4. Carbon build-up on
muffler outlet screen.

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.

1. See “Carburetor Adjustment” in

Service and Adjustments Section.

2. Contact an authorised service dealer.

3. Contact an authorised service dealer.

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.

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.

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.

15

DECLARATION OF CONFORMITY

EC Declaration of Conformity (Only applies to Europe)
We, Husqvarna Outdoor Products Italia, S.p.A., Valmadrera, Italy. Tel: [phone],

declare that the brushcutter model McCulloch Mac 250 B from serial numbers
2007--305N00001 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 22 June 1998 “relating to machinery” 98/37/EC, annex IIA;
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. The measured sound power is 110,3 dB(A), the guaranteed sound power is
114 dB(A). The cutting width is 431 mm.

The following standards have been applied: EN12100--1:2003, EN 12100 --2:2003, EN ISO

11806:1997 and CISPR 12:1997.
SMP, The Swedish Machinery Testing Institute, Fyrisborgsgatan 3 S--754 50 Uppsala,

Sweden, has carried out voluntary type approval. The certificate(s) are numbered:
SEC/07/1217.

0 1 -- 1 1 -- 0 7

Michael S. Bounds, Director
Product Safety and Standards
Handheld Consumer Products

16

TECHNICAL DAT A SHEET

MODEL: Mac 250 B Blade Trimmer

ENGINE

Displacement, cm
Maximum engine power, measured in
accordance with ISO 8893, kW 0,7 0,7
Catalytic converter muffler Yes Yes

ENGINE ROTATIONAL SPEEDS

At maximum engine power, rpm 8000 8000
Maximum rotational frequency of the spindle 10000 10000
Engine speed at recommended maximum
spindle rotational frequency 7400 7400
Recommended speed idling, rpm 3000 3000

FUEL AND LUBRICATION SYSTEM

Fuel tank volume capacity, cm
Fuel consumption at maximum engine power,
measured in accordance with ISO 8893, g/h 407 407
Specified fuel consumption at max. engine power,
measured in accordance with ISO 8893, g/kWh 768 768

WEIGHT

Without cutting attachment or shield, empty tank, kg 3,7 3,7

CUTTING ATTACHMENT

Weed blade, part number #530055892 Opt.
Cutting head assembly, part number Opt. #537419202

NOISE LEVELS (Octave Band Analysis 100--10000hz 1/3 Octave)

SOUND PRESSURE LEVELS measured in accordance with ISO 22868
Idling, dB(A) 78,6 78,6
Racing, dB(A) 99,0 98,5
SOUND POWER LEVELS in accordance with ISO 22868
Sound power level, measured dB(A) 110,3 110,3
Sound power level, guaranteed L

VIBRATION LEVELS measured in accordance with ISO 22867
FRONT HANDLE
Idling, m/s
Racing, m/s

REAR HANDLE
Idling, m/s
Racing, m/s

3

3

dB(A) 114,0 114,0

WA

2

2

2

2

25 25

340 340

2,3 2,0
5,7 6,3

4,2 2,6
8,8 5,3

ADDRESS: Husqvarna Outdoor Products Italia S.p.A.

ViaComo72
Valmadrera, Lecco
ITAL Y I--23868

17