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 Handha-
bung 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
instrucciones para la referencia en el futuro.
GB
FR
DE
ES
115162826 Rev. 1 7/15/09 BRW
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2
IDENTIFICATION (WHAT IS WHAT?)
Chain
Adjustment Tool
(Bar Tool)
Bar Oil Fill Cap
Chain
Front Hand Guard
Starter Rope
ON/STOP
Switch
Muffler
Choke/
Fast Idle
Lever
Fuel Mix Fill Cap
Starter Housing
Idle Speed Screw
Bumper
spike Primer Bulb
Front Handle
Guide Bar
Bar Nuts
Cylinder Cover
Throttle
Lockout
Rear
Handle
Throttle
Trigger
Chain
Brake
Chain
Direction
of Travel
Adjusting Screw
Chain
Catcher
Clutch Cover
IDENTIFICATION OF SYMBOLS
WARNING! This chain
saw can be dangerous! Care-
less or improper use can cause
serious or even fatal injury.
Read and understand the
instruction manual before
using the chain saw.
Always use two
hands when
operating the
chain saw.
WARNING! Contacting the guide bar tip with any object
should be avoided; tip contact may cause the guide bar to
move suddenly upward and backward, which may cause se-
rious injury.
Always wear appropriate ear
protection, eye protection
and head protection.
Sound power level
Sound pressure level
at 7,5 meters
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IDENTIFICATION OF SYMBOLS
Move ON/STOP switch to
the ON position.
Slowly press primer bulb
6 times.
Pull the starter rope
sharply 5 times with your
right hand.
Pull the starter rope sharply
with your right hand until
the engine starts.
Pull choke/fast idle lever
out to the full extent (to
the FULL CHOKE posi-
tion).
Push the choke/fast idle
lever in to the HALF
CHOKE position.
Starting Reminder
SAFETY RULES
WARNING: Always disconnect
spark plug wire and place wire where it can-
not contact spark plug to prevent accidental
starting when setting up, transporting, ad-
justing or making repairs except carburetor
adjustments.
Because a chain saw is a high-speed wood-
cutting tool, special safety precautions must
be observed to reduce the risk of accidents.
Careless or improper use of this tool can
cause serious injury.
PLAN AHEAD
S Read this manual carefully until you com-
pletely understand and can follow all safety
rules, precautions, and operating instruc-
tions before attempting to use the unit.
S Restrict the use of your saw to adult users
who understand and can follow safety
rules, precautions, and operating instruc-
tions found in this manual.
Snug
Fitting
Clothing
Safety
Shoes
Safety Chaps
Heavy Duty
Gloves
Eye
Protection
Hearing
Protection
Safety Hat
S Wear protective gear. Always use steel-toed
safety footwear with non-slip soles; snug-fit-
ting clothing; heavy-duty, non-slip gloves;
eye protection such as non-fogging, vented
goggles or face screen; an approved safety
hard hat; and sound barriers (ear plugs or
mufflers) to protect your hearing. Secure hair
above shoulder length.
S Always use approved hearing protection.
Regular users should have hearing
checked regularly as chain saw noise can
damage hearing. Long--term exposure to
noise can result in permanent hearing im-
pairment.
S Keep all parts of your body away from the
chain when the engine is running.
S Keep children, bystanders, and animals a
minimum of 10 meters away from the work
area. Do not allow other people or animals
to be near the chain saw when starting or
operating the chain saw.
S Do not handle or operate a chain saw
when you are fatigued, ill, or upset, or if you
have taken alcohol, drugs, or medication.
You must be in good physical condition
and mentally alert. Chain saw work is
strenuous. If you have any condition that
might be aggravated by strenuous work,
check with your doctor before operating a
chain saw.
S Carefully plan your sawing operation in ad-
vance. Do not start cutting until you have a
clear work area, secure footing, and, if you
are felling trees, a planned retreat path.
OPERATE YOUR SAW SAFELY
WARNING: Long term inhalation of
the engine’s exhaust fumes, chain oil mist and
dust from sawdust can result in serious per-
sonal injury.
S Do not operate a chain saw with one hand.
Serious injury to the operator, helpers, by-
standers or any combination of these per-
sons may result from one-handed opera-
tion. A chain saw is intended for
two-handed use.
S Operate the chain saw only in a well-venti-
lated outdoor area.
S Do not operate saw from a ladder or in a
tree, unless you are specifically trained to
do so.
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S Make sure the chain will not make contact
with any object while starting the engine.
Never try to start the saw when the guide
bar is in a cut.
S Do not put pressure on the saw at the end of
the cut. Applying pressure can cause you to
lose control of the chain saw when the cut is
completed and may cause serious personal
injury.
S Stop the engine before setting the saw down.
S Do not operate a chain saw that is dam-
aged, improperly adjusted, or not com-
pletely and securely assembled. Always
replace bar, chain, hand guard, or chain
brake immediately if it becomes damaged,
broken or is otherwise removed.
S With the engine stopped, hand carry the
chain saw with the muffler away from your
body, and the guide bar and chain to the
rear, preferably covered with a scabbard.
CHAIN SAW SAFETY EQUIPMENT
NOTE: In this section, the safety features of
the chain saw and their function are explained.
For inspection and maintenance, see instruc-
tions in the CHECKING, MAINTAINING AND
SERVICING CHAIN SAW SAFETY EQUIP-
MENT section. See instructions under the
WHAT IS WHAT? section, to find where these
parts are located on your chain saw. 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 informa-
tion, please contact your nearest service
dealer.
S Chain brake. Your chain saw is equipped
with a chain brake that is designed to stop
the chain from moving.
WARNING: The chain brake is de-
signed to stop the chain immediately if you
get a kickback. The chain brake reduces the
risk of accidents, but only you can prevent
them. DO NOT ASSUME THAT THE CHAIN
BRAKE WILL PROTECT YOU IN THE
EVENT OF A KICKBACK.
S Throttle trigger lock -out. The throttle
lock--out is designed to prevent accidental
operation of the throttle trigger.
S Chain catcher. The chain catcher is de-
signed to catch the saw chain if it breaks.
S Vibration damping system. Your chain
saw is equipped with a vibration damping
system that is designed to minimize vibra-
tion and make operation easier.
SAFETY NOTICE: Exposure to vibrations
through prolonged use of gasoline powered
hand tools could cause blood vessel or nerve
damage in the fingers, hands, and joints of peo-
ple prone to circulation disorders or abnormal
swellings. Prolonged use in cold weather has
been linked to blood vessel damage in other-
wise healthy people. If symptoms occur such
as numbness, pain, loss of strength, change in
skin color or texture, or loss of feeling in the fin-
gers, hands, or joints, discontinue the use of
this tool and seek medical attention. An anti-
vibration system does not guarantee the avoid-
ance 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.
S ON/STOP switch. The ON/STOP switch
should be used to stop the engine.
CHECKING, MAINTAINING AND
SERVICING CHAIN SAW SAFETY
EQUIPMENT
WARNING: Never use a chain saw
with defective safety equipment. Safety
equipment must be inspected and main-
tained. If your chain saw does not pass in-
spection, take the saw to your nearest ser-
vice dealer for repair.
S Chain brake. Brush off any wood dust,
resin and dirt from the chain brake and
clutch drum. Dirt and wear can impair op-
eration of the brake. For additional infor-
mation, see OPERATING YOUR UNIT
section.
S Throttle trigger lock -out. Check that the
throttle trigger can not be operated until the
throttle lock--out is pressed.
S Chain catcher. Check that the chain
catcher is not damaged and is firmly at-
tached to the body of the chain saw.
S Vibration damping system. Regularly
check the vibration damping units for
cracks or deformation. Make sure the
vibration damping units are securely at-
tached to the engine unit and handle unit.
S ON/STOP switch. Start the engine and
make sure the engine stops when you
move the ON/STOP switch to the STOP
position.
MAINTAIN YOUR SAW IN GOOD
WORKING ORDER
S Have all chain saw service performed by a
qualified service dealer with the exception of
the items listed in the maintenance section of
this manual. For example, if improper tools
are used to remove or hold the flywheel
when servicing the clutch, structural damage
to the flywheel can occur and cause the fly-
wheel to burst.
S Make certain the saw chain stops moving
when the throttle trigger is released. For
correction, refer to CARBURETOR AD-
JUSTMENTS.
S Never modify your saw in any way. Use
only attachments supplied or specifically
recommended by the manufacturer.
S Keep the handles dry, clean, and free of oil
or fuel mixture.
S Keep fuel and oil caps, screws, and fas-
teners securely tightened.
S Use only McCullochR accessories and re-
placement parts as recommended.
HANDLE FUEL WITH CAUTION
S Do not smoke while handling fuel or while
operating the saw.
S Eliminate all sources of sparks or flame in
the areas where fuel is mixed or poured.
There should be no smoking, open flames,
or work that could cause sparks. Allow en-
gine to cool before refueling.
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5
S Mix and pour fuel in an outdoor area on bare
ground; store fuel in a cool, dry, well venti-
lated place; and use an approved, marked
container for all fuel purposes. Wipe up all
fuel spills before starting saw.
S Move at least 10 feet (3 meters) from fuel-
ing site before starting engine.
S Turn the engine off and let saw cool in a
non-combustible area, not on dry leaves,
straw, paper, etc. Slowly remove fuel cap
and refuel unit.
S Store the unit and fuel in an area where fuel
vapors cannot reach sparks or open
flames from water heaters, electric motors
or switches, furnaces, etc.
KICKBACK
WARNING: Avoid kickback which
can result in serious injury. Kickback is the
backward, upward or sudden forward motion
of the guide bar occurring when the saw
chain near the upper tip of the guide bar con-
tacts any object such as a log or branch, or
when the wood closes in and pinches the
saw chain in the cut. Contacting a foreign ob-
ject in the wood can also result in loss of
chain saw control.
S Rotational Kickback can occur when the
moving chain contacts an object at the up-
per tip of the guide bar. This contact can
cause the chain to dig into the object,
which stops the chain for an instant. The
result is a lightning fast, reverse reaction
which kicks the guide bar up and back to-
ward the operator.
S Pinch-Kickback can occur when the the
wood closes in and pinches the moving
saw chain in the cut along the top of the
guide bar and the saw chain is suddenly
stopped. This sudden stopping of the
chain results in a reversal of the chain
force used to cut wood and causes the
saw to move in the opposite direction of the
chain rotation. The saw is driven straight
back toward the operator.
S Pull-In can occur when the moving chain
contacts a foreign object in the wood in the
cut along the bottom of the guide bar and the
saw chain is suddenly stopped. This sudden
stopping pulls the saw forward and away
from the operator and could easily cause the
operator to lose control of the saw.
Avoid Pinch -Kickback:
S Be extremely aware of situations or obstruc-
tions that can cause material to pinch the top
of or otherwise stop the chain.
S Do not cut more than one log at a time.
S Do not twist the saw as the bar is with-
drawn from an undercut when bucking.
Avoid Pull -In:
S Always begin cutting with the engine at full
speed and the saw housing against wood.
S Use wedges made of plastic or wood.
Never use metal to hold the cut open.
Kickback Path
Clear The
Working Area
Avoid Obstructions
REDUCE THE CHANCE OF
KICKBACK
S Recognize that kickback can happen.
With a basic understanding of kickback,
you can reduce the element of surprise
which contributes to accidents.
S Never let the moving chain contact any ob-
ject at the tip of the guide bar.
S Keep the working area free from obstruc-
tions such as other trees, branches, rocks,
fences, stumps, etc. Eliminate or avoid any
obstruction that your saw chain could hit
while you are cutting through a particular log
or branch.
S Keep your saw chain sharp and properly
tensioned. A loose or dull chain can increase
the chance of kickback occurring. Follow
manufacturer’s chain sharpening and main-
tenance instructions. Check tension at regu-
lar intervals with the engine stopped, never
with the engine running. Make sure the bar
clamp nuts are securely tightened after ten-
sioning the chain.
S Begin and continue cutting at full speed. If
the chain is moving at a slower speed, there
is greater chance of kickback occurring.
S Cut one log at a time.
S Use extreme caution when re-entering a
previous cut.
S Do not attempt cuts starting with the tip of
the bar (plunge cuts).
S Watch for shifting logs or other forces that
could close a cut and pinch or fall into chain.
S Use the Reduced--Kickback Guide Bar
and Low--Kickback Chain specified for
your saw.
MAINTAIN CONTROL
Never reverse
hand positions
Stand to the left of
the saw
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Description
This manual covers the 738, 740, 742, 441, and 442 model saws. It is a valuable resource for both professional mechanics and DIY enthusiasts. The file format is PDF, which is compatible with all versions of Windows, Mac, and Linux. It is printable and can be accessed instantly at high speed. The only requirement is Adobe Reader.
