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.
GB
115164026 Rev. 1 7/15/09 BRW
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IDENTIFICATION OF SYMBOLS
Starting Reminder
Move ON/STOP switch to
the ON position.
Pull the starter rope
sharply 5 times with your
right hand.
Push the choke/fast idle
lever in to the HALF
CHOKE position.
Slowly press primer bulb
6 times.
Pull choke/fast idle lever
out to the full extent (to
the FULL CHOKE posi-
tion).
Pull the starter rope sharply
with your right hand until
the engine starts.
SAFETY RULES
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.
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.
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
whenyouare 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.
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.
Safety Hat
Hearing
S Carefully plan your sawingoperation inad-
vance. Do not start cutting until you havea
clear work area, secure footing, and, if you
are felling trees, a planned retreat path.
Protectio
e
otection
Snug
Fitting
Clothing
avy Duty
oves
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-
Sa
Sh
Chaps
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.
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.
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 beoperated 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.
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.
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.
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 ASSUMETHAT 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-
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 nosmoking, openflames,
or work that could cause sparks. Allow en-
gine to cool before refueling.
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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.
ickback Path
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 Storetheunit and fuel in an area where fuel
vapors cannot reach sparks or open
flames from water heaters, electric motors
or switches, furnaces, etc.
Obstructions
Clear T
Working Area
REDUCE THE CHANCE OF
KICKBACK
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 themoving 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.
WARNING: Avoid kickback which
can result in serious injury. Kickback is the
backward, upwardor sudden forwardmotion
of the guide bar occurring when the saw
chain near the upper tip of theguide 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 foreignob-
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 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.
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.
MAINTAIN CONTROL
Avoid Pinch -Kickback:
Stand to the lef
the saw
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.
Never reverse
hand positions
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Symmetrical Gude Bar
Large Radius Tip
Elbow locked
S Low--Kickback Chain, designed with a
contoured depth gauge and guard link
which deflect kickback force and allow
wood to gradually ride into the cutter.
Thumb on underside of
handlebar
Low-Kickback Chain
Contoured Depth Gauge
Elongated Guard Link
Deflects Kickback
Force And Allows
S Keep a good, firm grip on the saw with both
hands when the engine is running and don’t
let go. A firm grip will help you reduce kick-
back and maintain control of the saw. Keep
the fingers of your left hand encircling and
your left thumb under the front handlebar.
Keep your right hand completely around the
rear handle whether your are right handed or
left handed. Keep your left arm straight with
the elbow locked.
Wood To Gradually
Ride Into Cutter
S Handguard, designed to reduce the chance
of your left hand contacting the chain if your
hand slips off the front handlebar.
S Position your left hand on the front handle-
bar so it is in a straight line with your right
hand on the rear handle when making
bucking cuts. Never reverse right and left
hand positions for any type of cutting.
S Standwith your weight evenly balancedon
both feet.
S Position of front and rear handlebars, de-
signed with distance between handles and
“in-line” with each other. The spread and
“in-line” position of the hands provided by
this design work together to give balance
and resistance in controlling the pivot of
the saw back toward the operator if kick-
back occurs.
S Stand slightly to the left side of the saw to
keep your body from being in a direct line
with the cutting chain.
WARNING: DO NOT RELY UPON
ANY OF THE DEVICES BUILT INTO YOUR
SAW. YOU SHOULD USE THE SAW
PROPERLY AND CAREFULLY TO AVOID
KICKBACK. Reduced--kickback guide bars
and low--kickback saw chains reduce the
chance and magnitude of kickback and are
recommended. Your saw has a low kickback
chain and bar as original equipment. Repairs
on a chain brake should be made by an au-
thorized servicing dealer. Take your unit to
the place of purchase if purchased from a
servicing dealer, or to the nearest authorized
master service dealer.
S Tip contact in some cases may cause a light-
ning fast reverse REACTION, kicking the
guide bar up and back toward the operator.
S Pinching the saw chain along the top of the
guide bar may push the guide bar rapidly
back toward the operator.
S Either of these reactions may cause you to
lose control of the saw which could result
in serious injury. Do not rely exclusively
uponthesafety devices built into your saw.
S Do not overreach. You could be drawn or
thrown off balance and lose control of the
saw.
S Do not cut above shoulder height. It is diffi-
cult to maintain control of saw above
shoulder height.I
KICKBACK SAFETY FEATURES
WARNING: The following features are
included on your saw to help reduce the hazard
of kickback; however, such features will not to-
tally eliminate this dangerous reaction. As a
chain saw user, do not rely only on safety de-
vices. You must follow all safety precautions,
instructions, and maintenance in this manual to
help avoid kickback and other forces which
can result in serious injury.
S Reduced--Kickback Guide Bar, designed
with a small radius tip which reduces the
size of the kickback danger zone on the
bar tip. A Reduced--Kickback Guide Bar has
been demonstrated to significantly reduce
the number and seriousness of kickbacks.
Reduced Kickback
Symmetrical
Guide Bar
Small Radius Tip
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ASSEMBLY
Protective gloves (not provided) should be
4. Turn the adjusting screw by hand coun-
terclockwise until the adjusting pin just
touches the stop. This should allow the
pin to be near the correct position.
5. Slide guide bar on bar bolts until guide bar
stops against clutch drum sprocket.
worn during assembly.
ATTACHING THE BUMPER SPIKE
The bumper spike may be used as a pivot
when making a cut.
1. Loosen and remove the bar nuts and the
clutch cover from the saw.
2. Attach the bumper spike with the two
screws as illustrated.
ATTACHING THE BAR & CHAIN
Bar bolts
(If not already attached)
WARNING: Recheck each assem-
bly step if the saw is received assembled. Al-
ways wear gloves when handling the chain.
The chain is sharp and can cut you even
when it is not moving!
Guide bar
6. Carefully remove the chain from the pack-
age. Hold chain with the drive links as
shown.
1. Loosen and remove the bar nuts and the
clutch cover from the saw.
2. Remove the plastic shipping spacer (if
present).
Tip of
Bar
Clutch cov
CUTTERS MUST FACE IN
DIIRECTION OF ROTATION
Bar nuts
Location of
shipping
spacer
Depth Gauge
Cutters
Chain adjustment tool
(Bar Tool)
3. An adjusting pin and screw is used to ad-
just the tension of the chain. It is very im-
portant when assembling the bar, that the
pin located on the adjusting screw aligns
into a hole in the bar. Turning the screw will
move the adjustment pin up and down the
screw. Locate this adjustment before you
begin mounting the bar onto the saw. See
following illustration.
Drive Links
7. Place chain over and behind clutch re-
tainer, fitting the drive links in the clutch
drum sprocket.
8. Fit bottom of drive links between the
teeth in the sprocket in the nose of the
guide bar.
9. Fit chain drive links into bar groove.
10. Pull guide bar forward until chain is snug
in guide bar groove. Ensureall drive links
are in the bar groove.
11. Now, install clutch cover making sure the
adjusting pin is positioned in the lower
hole in the guide bar. Remember this pin
moves the bar forward and backward as
the screw is turned.
nside
view of
clutch
cover
Adjustment located on clutch cover
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1. Loosen bar nuts until they are finger tight
against the clutch cover.
2. Turn adjusting screw clockwise until chain
solidly contacts bottom of guide bar rail.
Clutch
Cover
Adjusting Pin
Lower
Hole
3. Using bar tool, roll chain around guide bar
to ensure all links are in bar groove.
Guide Bar
4. Lift up tip of guide bar to check for sag.
Release tip of guide bar, then turnadjust-
1
12. Install bar nuts and finger tighten only.
Once the chain is tensioned, you will
need to tighten bar nuts.
ing screw / turn clockwise. Repeat un-
4
til sag does not exist.
1
Adjusting Screw --
/
4
Turn
CHAIN TENSION (Including units
with chain already installed)
WARNING: Wear protective gloves
when handling chain. The chain is sharpand
can cut you even when it is not moving.
NOTE: When adjusting chain tension,
make sure the bar nuts are finger tight only.
Attempting to tension the chain when the bar
nuts are tight can cause damage.
5. While lifting tip of guide bar, tighten bar
nuts securely with the bar tool.
Bar Nuts
Checking the tension:
Use the screwdriver end of the chain adjust-
ment tool (bar tool) to move chain around
guide bar. If the chain does not rotate, it is too
tight. If the chain is tooloose, it will sag below
the bar.
6. Use the screwdriver end of thebar tool to
move chain around guide bar.
7. If chain does not rotate, it is too tight.
Guide
Bar
Slightly loosen bar nuts and loosen chain
1
by turning the adjusting screw
/
4
turn
counterclockwise. Retighten bar nuts.
8. If chain is too loose, it will sag below the
guidebar. DO NOT operate the saw if the
chain is loose.
Chain Adjustment
Tool
Adjusting
Screw
Bar Nuts
WARNING: If the saw is operated
with a loose chain, the chain could jump off
the guide bar and result in serious injury.
(Bar Tool)
Adjusting the tension:
Chain tension is very important. Chains
stretch during use. This is especially true
during the first few times you use your saw.
Always check chain tension each time you
use and refuel your saw.
WARNING: Muffler is very hot during
and after use. Do not touch the muffler or al-
low combustible material such as dry grass
or fuel to do so.
OPERATING YOUR UNIT
filled. Lack of oil will quickly ruin the bar and
chain. Too little oil will cause overheating
shown by smoke coming from the chain and/
or discoloration of the bar. Only use Bar and
Chain Oil for bar and chain lubrication.
BEFORE STARTING ENGINE
WARNING: Be sure to read the fuel
information in the safety rules before you be-
gin. If you donot understand the safety rules,
do not attempt to fuel your unit. Contact an
authorized service dealer.
FUELING ENGINE
BAR AND CHAIN LUBRICATION
The bar and chain require continuous lubri-
cation. Lubrication is provided by the auto-
matic oiler system when the oil tank is kept
WARNING: Remove fuel cap slowly
when refueling.
This engine is certified to operate on unleaded
gasoline. Before operation, gasoline must be
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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 0,125
liter of oil with 5 liters of unleaded gasoline. DO
NOT USE automotive or boat oil. These oils
will cause engine damage. When mixing fuel
follow the instructions printed on the container.
Always read and follow the safety rules relating
to fuel before fueling your unit.
NOTE:Do not cut material with the choke/fast
idle lever at the FULL CHOKE position.
STARTING A COLD ENGINE (or a
warm engine after running out of
fuel)
NOTE:Inthefollowing steps, when the cho-
ke/fast idle lever is pulled out to the full ex-
tent, the correct throttle setting for starting is
set automatically.
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 en-
gine and let it run until the fuel lines and carbu-
retor are empty. Use fresh fuel next season.
Never use engine or carburetor cleaner prod-
ucts in the fuel tank or permanent damage may
occur.
NITION
WITCH
ON
STOP
Choke
Lever
CHAIN BRAKE
1. Move ON/STOP switch to the ON posi-
tion.
Ensure chain brake is disengaged by pulling
the front hand guard back toward the front han-
dle as far as possible. The chain brake must be
disengaged before cutting with the saw.
2. Slowly press primer bulb 6 times.
3. Pull out choke/fast idle to the full extent
(to the FULL CHOKE position).
4. Pull the starter rope sharply 5 times with
your right hand. Then, proceed to the
next step.
WARNING: The chain must not
move when the engine runs at idle speed. If
the chain moves at idle speed refer to CAR-
BURETOR ADJUSTMENT within this
manual. Avoid contact with the muffler. A hot
muffler can cause serious burns.
NOTE: If the engine sounds as if it is trying
to start before the 5th pull, stop pulling and
immediately proceed to the next step.
5. Push the choke/fast idle lever in to the
HALF CHOKE position.
To stop the engine, move the ON/STOP
switch to the STOP position.
To start the engine, hold the saw firmly on
the ground as illustrated below. Make sure
the chain is free to turn without contacting
any object.
CHOKE/FAST IDLE LEVER
OFF
HALF
Use only 40 --- 45 cm of rope per pull.
Hold saw firmly while pulling starter rope.
ULL
Starter Rope Handle
Left Hand
on Front
Handle
6. Pull the starter rope sharply with your
right hand until the engine starts.
7. Allow the engine to run for approximately
30 seconds. Then, squeeze and release
throttle trigger to allow engine to return to
idle speed.
STARTING A WARM ENGINE
1. Move ON/STOP switch to the ON posi-
tion.
Right Foot Through Rear Handle
2. Pull the choke/fast idle lever out to the
FULL CHOKE position to set the fast
idle, then push the lever in to the HALF
CHOKE position.
IMPORTANT POINTS TO REMEMBER
When pulling the starter rope, do not use the full
extent of the rope as this can cause the rope to
break. Do not let starter rope snap back. Hold
the handle and let the rope rewind slowly.
For cold weather starting, start the unit at full
choke; allow the engine to warm up before
squeezing the throttle trigger.
3. Slowly press the primer bulb 6 times.
4. Pull the starter rope sharply with your
right hand until the engine starts.
5. Squeeze and release throttle trigger to
allow engine to return to idle speed.
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Disengaged
DIFFICULT STARTING (or starting a
flooded engine)
The engine may be flooded with too much
fuel if it has not started after 10 pulls.
Flooded engines can be cleared of excess
fuel by pushing the choke/fast idle lever in
completely (to the OFF CHOKE position)
and then following the warm engine starting
procedure listed above. Ensure the ON/
STOP switch is in the ON position.
Starting could require pulling the starter rope
handle many times depending on how badly
the unit is flooded. If engine fails to start, re-
fer to the TROUBLESHOOTING TABLE.
Braking function control
CAUTION: The chain brake must be
checked several times daily. The engine
must be running when performing this proce-
dure. This is the only instance when the saw
should be placed on the ground with the en-
gine running.
CHAIN BRAKE
Place the saw on firm ground. Grip the rear
handlewith your right hand andthe front han-
dle with your left hand. Apply full throttle by
fully depressing the throttle trigger. Activate
the chain brake by turning your left wrist
against the hand guard without releasing
your grip around the front handle. The chain
should stop immediately.
WARNING: If the brake band is worn
too thin it may break when the chain brake is
triggered. With a broken brake band, the chain
brake will not stop the chain. The chain brake
should be replaced by an authorized service
dealer if any part is worn to less than 0,02″ (0,5
mm) thick. Repairs on a chain brake should be
made by an authorized service dealer. Take
your unit to the place of purchase if purchased
from a servicing dealer, or to the nearest autho-
rized master service dealer.
Inertia activating function control
WARNING: When performing the fol-
lowing procedure, the engine must be turned
off.
S This saw is equipped with a chain brake.
The brake is designed to stop the chain if
kickback occurs.
Grip the rear handle with your right hand and
the front handle with your left hand. Hold the
chain saw approximately 35 cm above a
stump or other wooden surface. Release
your grip on the front handle and use the
weight of the saw to let the top of the guide
bar fall forward and contact the stump.
When the tip of the bar hits the stump, the
brake should activate.
S The inertia activated chain brake is activated
if the front hand guard is pushed forward, ei-
ther manually or by centrifugal force.
S If the brake is already activated, it is disen-
gaged by pulling the front hand guard back
toward the front handle as far as possible.
S When cutting with the saw, the chain brake
must be disengaged.
CUTTING METHODS
gine to idle. If you run the saw at full
throttle without a cutting load, unneces-
sary wear can occur.
IMPORTANT POINTS
S Check chain tension before first use and af-
ter 1 minute of operation. See CHAIN TEN-
SION in the ASSEMBLY section.
S
To avoid losing control when cut is com-
plete, do not put pressure on saw at end
of cut.
S Cut wood only. Do not cut metal, plastics,
masonry, non-wood building materials, etc.
S The bumper spike may be used as a pivot
when making a cut.
S Stop the saw if the chain strikes a foreign
object. Inspect thesaw and repair parts as
necessary.
S Keep the chain out of dirt and sand. Evena
small amount of dirt will quickly dull a chain
and increase the possibility of kickback.
S Practice cutting a few small logs using the
following techniques to get the “feel” of us-
ing your saw before you begin a major
sawing operation.
S Stop the engine before setting the saw down.
TREE FELLING TECHNIQUES
WARNING: Felling a tree requires
chain saw skills and experience. Inexperi-
enced users should not fell trees. Do not at-
tempt any task that makes you feel uncom-
fortable or unsure.
WARNING: Do not cut near buildings
or electrical wires if you do not know the di-
rection of tree fall, at night since you will not
be able to see well, or during bad weather
such as rain, snow, or strong winds. as fall is
unpredictable.
Carefully plan your sawing operation in ad-
vance. You need a clear area all around the
tree so you can have secure footing. Check
for broken or dead branches which can fall
on you causing serious injury.
S
S
S
S
S
Squeeze the throttle trigger and allow the
engine to reach full speed before cutting.
Begin cutting with the saw frame
against the log.
Keep the engine at full speed the entire
time you are cutting.
Allow the chain to cut for you. Exert only
light downward pressure.
Release the throttle trigger as soon as
the cut is completed, allowing the en-
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Natural conditions that can cause a tree to
fall in a particular direction include:
Hinge holds tree on stump and helps
control fall
Opening
of felling
cut
S The wind direction and speed.
S The lean of the tree. The lean of a tree
might not be apparent due to uneven or
sloping terrain. Use a plumb or level to de-
termine the direction of tree lean.
S Weight and branches on one side.
S Surrounding trees and obstacles.
Look for decay and rot. If the trunk is rotted,
it can snap and fall toward the operator.
Make sure there is enough room for the tree to
fall. Maintain a distance of 2-1/2 tree lengths
from the nearest person or other objects. En-
gine noise can drown out a warning call.
Remove dirt, stones, loose bark, nails, staples,
and wire from the tree where cuts are to be
made.
Closing
of notch
NOTE: Before felling cut is complete, use
wedges to open the cut when necessary to
controlthedirectionof fall. To avoid kickback
or chain damage, use wood or plastic
wedges, but never steel or iron wedges.
S Be alert to signs that the tree is ready to fall:
cracking sounds, widening of the felling cut,
or movement in the upper branches.
S As tree starts to fall, stop saw, put it down,
and get away quickly on your planned re-
treat path.
Plan a clear retreat path
S DO NOT cut down a partially fallen tree with
your saw. Be extremely cautious with par-
tially fallen trees that may be poorly sup-
ported. When a tree doesn’t fall completely,
set the saw aside and pull down the tree with
a cable winch, block and tackle, or tractor.
Direction of Fall
45_
CUTTING A FALLEN TREE
(BUCKING)
FELLING LARGE TREES
Bucking is the term used for cutting a fallen
tree to the desired log length.
(15 cm in diameter or larger)
The notch method is used to fell large trees.
A notch is cut on the side of the tree in thede-
sired direction of fall. After a felling cut is
made on the opposite side of tree, the tree
will tend to fall into the notch.
WARNING: Do not stand on the log
being cut. Any portion can roll causing loss
of footing and control. Do not stand downhill
of the log being cut.
NOTCH CUT AND FELLING THE
Important points
TREE
S Cut only one log at a time.
S Make notch cut by cutting the top of the
notch first. Cut through 1/3 of the diameter
of the tree. Next complete the notch by cut-
ting the bottom of the notch. See illustra-
tion. Once the notch is cut remove the
notch of wood from the tree.
S Cut shattered wood very carefully; sharp
pieces of woodcould beflung towardoper-
ator.
S Use a sawhorse to cut small logs. Never
allow another person to hold the log while
cutting and never hold the log with your leg
or foot.
S Do not cut in an area where logs, limbs,
and roots are tangled. Drag the logs into a
clear area before cutting by pulling out ex-
posed and cleared logs first.
Final cut here. 5 cm above
center of notch.
First cut
5 cm
TYPES OF CUTTING USED FOR
BUCKING
Notch
5 cm
WARNING: If saw becomes pinched
or hung in a log, don’t try to force it out. You
can lose control of the saw resulting in injury
and/or damage to the saw. Stop the saw,
drive a wedge of plastic or wood into the cut
until the saw can be removed easily. Restart
the saw and carefully reenter the cut. Do not
attempt torestart your saw whenit is pinched
or hung in a log.
Second cut
S After removing the wood from the notch,
make the felling cut on the opposite side of
the notch. This is done by making a cut about
5 cm higher than the center of the notch.
This will leave enough uncut wood between
the felling cut and the notch to form a hinge.
This hinge will help prevent the tree from fall-
ing in the wrong direction.
Turn saw OFF and use a plastic or
wooden wedge to force cut open.
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Overcutting begins on the top sideof thelog
with the saw against the log. When overcut-
ting use light downward pressure.
Using a support stand
nd
2
Cut
Overcutting
st
1
Cut
Und
Undercutting involves cutting on the under-
side of the log with top of saw against the log.
When undercutting use light upward pres-
sure. Hold saw firmly and maintain control.
The saw will tend to push back toward you.
st
1
Cut
nd
2
Cut
WARNING: Never turn saw upside
down to undercut. The saw cannot be con-
trolled in this position.
First cut on pressure side of log
LIMBING AND PRUNING
WARNING: Be alert for and guard
against kickback. Do not allow the moving
chain to contact any other branched or objects
at the nose of the guide bar when limbing or
pruning. Allowing such contact can result in
serious injury.
Second cut
Second cut
WARNING: Never climb into a tree to
limb or prune. Do not stand on ladders, plat-
forms, a log, or in any position which can cause
you to lose your balance or control of the saw.
First cut on pressure side of log
IMPORTANT POINTS
BUCKING WITHOUT A
S Watch out for springpoles. Use extreme
caution when cutting small size limbs. Slen-
der material may catch the saw chain and be
whipped toward you or pull you off balance.
S Be alert for springback. Watch out for
branches that are bent or under pressure.
Avoid being struck by the branch or the
saw when the tension in the wood fibers is
released.
SUPPORT
S Overcut through 1/3 of the diameter of the
log.
S Roll the log over and finish with a second
overcut.
S Give special attention to logs under strain
to prevent the saw from pinching. Make
the first cut on the pressure side to relieve
the stress on the log.
S Keep a clear work area. Frequently clear
branches out of the way to avoid tripping
over them.
BUCKING USING A LOG OR SUP-
PORT STAND
S Remember your first cut is always on the
pressure side of the log.
LIMBING
S Always limb atreeafter it is cut down. Only
then can limbing be done safely and prop-
erly.
S Your first cut should extend 1/3 of the
diameter of the log.
S Finish with your second cut.
S Leave the larger limbs underneath the
felled tree to support the tree as you work.
S Start at base of the felled tree and work to-
ward the top, cutting branches and limbs.
Remove small limbs with one cut.
S Keep the tree between you and the chain
as much as possible.
Using a log for support
nd
2
Cut
S Remove larger, supporting branches with
the cuttingtechniques described in BUCK-
ING WITHOUT A SUPPORT.
S Always use an overcut to cut small and
freely hanging limbs. Undercutting could
cause limbs to fall and pinch saw.
st
1
Cut
st
1
Cut
PRUNING
WARNING: Limit pruning to limbs
shoulder height or below. Do not cut if
branches are higher than your shoulder. Get
a professional to do the job.
nd
2
Cut
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S Make your fist cut 1/3 of the way through
the bottom of the limb.
S Next make a 2nd cut all the way through
the limb. Then cut a third overcut leaving
a 3 to 5 cm collar from the trunk of the tree.
Second cut
Third cut
Collar
First cut
Pruning technique
SERVICE AND ADJUSTMENTS
Cylinder
Cover
Air Filter
Cover
WARNING: Improper maintenance
could result in serious engine damage or in se-
rious injury.
WARNING: Disconnect the spark
plug before performing maintenance, except
for carburetor adjustments.
Air Filter
We recommend all service and adjustments
not listed in this manual be performed by an
Authorized Service Dealer.
MAINTENANCE SCHEDULE
Check:
Fuel mixture level . . . . Before each use
Bar lubrication . . . . . . . Before each use
Chain tension . . . . . . . Before each use
Chain sharpness . . . . Before each use
For damaged parts . . Before each use
For loose caps . . . . . . Before each use
For loose fasteners . . . Before each use
For loose parts . . . . . . Before each use
Inspect and Clean:
BAR MAINTENANCE
If your saw cuts to one side, has to be forced
through the cut, or been run with an improper
amount of bar lubrication it may be neces-
sary to serviceyour bar. A worn bar will dam-
age your chain and make cutting difficult.
After each use, ensure ON/STOP switch is
in the STOP position, then clean all sawdust
from the guide bar and sprocket hole.
To maintain guide bar:
Bar . . . . . . . . . . . . . . . . Before each use
Complete saw . . . . . . . After each use
Air filter . . . . . . . . . . . . . Every 5 hours*
Chain brake . . . . . . . . Every 5 hours*
Spark arresting screen
and muffler . . . . . . . . . Every 25 hours*
Replace spark plug . Yearly
S Move ON/STOP switch to the STOP posi-
tion.
S Loosen and remove bar nuts and chain
brake. Remove bar and chain from saw.
S Clean the oil holes and bar groove after each
5 hours of operation.
Replace fuel filter . . . Yearly
* Hours of Operation
AIR FILTER
Remove Sawdust From
Guide Bar Groove
CAUTION: Do not clean filter in gaso-
line or other flammable solvent to avoid
creating a fire hazard or producing harmful
evaporative emissions.
Cleaning the air filter:
Oil Holes
A dirty air filter decreases engine perform-
ance and increases fuel consumption and
harmful emissions. Always clean after every
5 hours of operation.
S Burring of guide bar rails is a normal
process of rail wear. Remove these burrs
with a flat file.
S When rail top is uneven, use a flat file to re-
store square edges and sides.
1. Clean the cover and the area around it to
keep dirt and sawdust from falling into
the carburetor chamber when the cover
is removed.
File Rail Edges
and Sides
Square
2. Remove the parts as illustrated.
3. Wash the filter in soap and water. Rinse
in clean cool water. Air dry completely
before reinstalling.
Worn Groove
Correct Groove
4. Reinstall parts.
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Replace guide bar when the groove is worn,
the guide bar is bent or cracked, or when
excess heating or burring of the rails occurs.
If replacement is necessary, use only the guide
bar specified for your saw in the repair parts list
or on the decal located on the chain saw.
TO SHARPEN CHAIN:
1. Move ON/STOP switch to the STOP
position.
2. Check chain for proper tension. Adjust
chain tension if necessary.
3. Sharpen cutters.
S
To sharpen the cutters, position the
file holder level (90˚) so that it rests
on the top edges of the cutter and
depth gauge.
SPARK PLUG
The spark plug should be replaced each
year to ensure the engine starts easier and
runs better. Ignition timing is fixed and non-
adjustable.
NOTE: The chain has both left and
right hand cutters.
1. Loosen 3 screws on cylinder cover.
2. Remove the cylinder cover.
3. Pull off the spark plug boot.
4. Remove spark plug from cylinder and
discard.
File Holder
Cutter
File
5. Replace with Champion RCJ--7Y spark
plug and tighten securely with a 19 mm
socket wrench. Spark plug gap should
be 0,5 mm.
90˚
Depth Gauge
6. Reinstall the spark plug boot.
7. Reinstall the cylinder cover and
screws. Tighten securely.
S
Align the 30˚ file holder marks paral-
lelwith thebar and to the center of the
chain.
3
Cutter
Cylinder
Cover
30˚
File Holder Line
Cutter
Spark
Plug Boot
S
Sharpen cutters on one side of the
chain first. File from the inside of each
cutter to the outside. Then, turn the
chain saw around and repeat the pro-
cess for the other side of the chain.
File on the forward stroke only. Use 2
or 3 strokes per cutting edge.
Keep all cutters the same length
when filing.
S
S
S
Spark
Plug
File enough to remove any damage
to cutting edges (side plate and top
plate of cutter).
Remove Damage
All Cutters
Same Length
CHAIN SHARPENING
WARNING: Improper chain sharpen-
ing techniques and/or depth gauge mainte-
nance will increase the chance of kickback
which can result in serious injury.
Top Plate
Side Plate
S
File chain to meet the specifications
as shown.
WARNING: Wear protective gloves
when handling chain. The chain is sharp and
can cut you even when it is not moving.
Conditions which indicate the need for chain
sharpening:
80˚
60˚
S Reduction in size of wood chips. The size
of the wood chip will decrease as the chain
gets duller until it becomes more like a
powder than a chip. Note that dead or
rotted wood will not produce a good chip.
S Saw cuts to one side or at an angle.
S Saw has to be forced through the cut.
30˚
Hook Angle
0,65 mm
Tools required:
S 5/32 inch (4 mm) diameter round file and
file holder
Rounded
Corner
Right
S Flat file
S Depth gauge tool
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Squared Off
Corner
S Turn idle speed screw (T) clockwise to in-
crease engine speed.
Too Much Hook Angle
S Turn idle speed screw (T) counterclock-
wise to decrease engine speed.
STORAGE
WARNING: Stop engine and allow to
cool, and secure the unit before storing or
transporting in a vehicle. Store unit and fuel
in an area where fuel vapors cannot reach
sparks or open flames from water heaters,
electric motors or switches, furnaces, etc.
Store unit withall guards in place. Position so
that any sharp object cannot accidentally
cause injury to passersby. Store the unit out
of reach of children.
Wrong
WARNING: Maintain the proper hook
angle according to the manufacturer’s specifi-
cations for the chain you are using. Improper
hook angle will increase the chance of kick-
back which can result in serious injury.
4. Check and lower depth gauges.
Depth Gauge Tool
File
S Before storing, drain all fuel from the unit.
Start engine and allow to run until it stops.
S Clean the unit before storing. Pay particu-
lar attention to the air intake area, keeping
it free of debris. Use a mild detergent and
sponge to clean the plastic surfaces.
S Donot store theunit or fuel in a closedarea
where fuel vapors can reach sparks or an
openflame from hot water heaters, electric
motors or switches, furnaces, etc.
Depth Gauge
S
S
Place gauge tool on cutter.
If the depth gauge is higher than the
depth gauge tool, file it level to the top of
the depth gauge tool.
S
Maintain rounded front corner of
depth gauge with a flat file.
S Store in a dry area out of the reach of chil-
dren.
NOTE: The very top of the depth
gauge should be flat with the front
half rounded off with a flat file.
S Ensure the machine is cleaned and that a
complete service is carried out before
long--term storage.
S The guide bar and chain must always be
covered with a scabbard when the machine
is being transported or in storage in order to
prevent accident contact with the sharp
chain. Even a non--moving chain can cause
serious cuts to yourself or persons you
bump into with an exposed chain.
If you require further assistance or are unsure
about performing this procedure, contact your
authorized service dealer.
CARBURETOR ADJUSTMENT
WARNING: The chain will be moving
during most of this procedure. Wear your pro-
tective equipment and observe all safety pre-
cautions. The chain must not move at idle
speed.
The carburetor has been carefully set at the
factory. Adjustments may be necessary if
you notice any of the following conditions:
S Chain moves at idle. See IDLE SPEED--T
adjusting procedure.
S Saw will not idle. See IDLE SPEED--T ad-
justing procedure.
CAUTION: It is important to prevent
gum deposits from forming in essential fuel
system parts such as the carburetor, fuel fil-
ter, fuel hose, or fuel tank during storage. Al-
cohol blended fuels (called gasohol or using
ethanol or methanol) can attract moisture
which leads to fuel mixture separation and
formation of acids during storage. Acidic gas
can damage the engine.
Idle Speed-- T
Allow engine to idle. If the chain moves, idle
is too fast. If the enginestalls, idle is tooslow.
Adjust speed until engine runs without chain
movement (idle too fast) or stalling (idle too
slow). The idle speed screw is located in the
area above the primer bulb and is labeled T.
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TROUBLESHOOTING TABLE
WARNING: Always stop unit and disconnect spark plug before performing all of
the recommended remedies below except remedies that require operation of the unit.
TROUBLE
CAUSE
REMEDY
Engine will not
start or will run
only a few
seconds after
starting.
1. Move ignition switch to ON.
2. See “Difficult Starting” in
Operation Section.
1. Ignition switch off.
2. Engine flooded.
3. Fill tank with correct fuel mixture.
4. Install new spark plug.
3. Fuel tank empty.
4. Spark plug not firing.
5. Fuel not reaching
carburetor.
5. Check for dirty fuel filter; replace.
Check for kinked or split fuel line;
repair or replace.
Engine will
not idle
properly.
1. Idle speed requires
adjustment.
2. Carburetor requires
adjustment.
1. See “Carburetor Adjustment” in the
Service and Adjustments Section.
2. Contact an authorized service dealer.
1. Clean or replace air filter.
Engine will not
accelerate,
lacks power,
or dies under
a load.
1. Air filter dirty.
2. Clean or replace plug and regap.
3. Disengage chain brake.
2. Spark plug fouled.
3. Chain brake engaged.
4. Carburetor requires
adjustment.
4. Contact an authorized service dealer.
Engine
1. Too much oil mixed with
gasoline.
1. Empty fuel tank and refill with
correct fuel mixture.
smokes
excessively.
Chain moves
at idle speed.
1. Idle speed requires
adjustment.
2. Clutch requires repair.
1. See “Carburetor Adjustment” in the
Service and Adjustments Section.
2. Contact an authorized service dealer.
DECLARATION OF CONFORMITY
EC Declaration of Conformity (Only applies to Europe)
We, Husqvarna AB, SE--561 82 Huskvarna, Sweden, Tel: +46--36--146000, as authorised
representative in the Community, declare that the chain saw model McCulloch Mac 838
SAS-AV from serial numbers 2009--031(N or D)00001 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
V of 2000/14/EC. The measured sound power is 108,7 dB(A), the guaranteed sound power is
113 dB(A) and the net power is 1,5 kW.
The following standards have been applied: ISO 11681-1:2004, EN/ISO 12100 -1:2003,
EN/ISO 12100-2:2003, and CISPR 12:2001.
Notified body, 0404 the Swedish Machinery Testing Institute, Fyrisborgsgatan 3 S--75450
Uppsala, Sweden, has carried out EC type approval. The certificate(s) is numbered:
404/05/1079.
The supplied Chain Saw conforms with the sample that underwent the EC type approval.
09--1--31
Ronnie E. Goldman, Director of Engineering
Handheld Consumer Products
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TECHNICAL DATA SHEET
Noise levels
Mac 838
99,7
Engine
Cylinder volume, cm
Stroke, mm
Idle speed, rpm
Recommended max.
speed, unloaded, rpm
Power, kW
Mac 838
38
3
Equivalent (see note 1) noise
pressure level at operator’s ear,
measured according to relevant
international standards, dB(A)
Equivalent (see note 1) noise
power level, measured
32
3000
12000
1,5
according to relevant
international standards, dB(A)
108,7
Ignition system
Manufacturer
Type of ignition system
Spark plug
Electrode gap, mm
Walbro
Inductive
Champion
0,5
Vibration levels
(see note 2)
2
2
Front handle, m/s
5,4
5,4
Rear handle, m/s
Fuel and lubrication system
Manufacturer
Chain/bar
Zama
W-26B
0,34
Standard bar length, in/cm
Recommended bar lengths, in/cm
Usable cutting length, in/cm
Chain speed at maximum
power, m/sec
14/35
Carburetor type
14/35
Fuel capacity, litre
Oil pump capacity at
8500 rpm, ml/min
Oil capacity, litre
13,5/34
4 -- 8
0,2
Automatic
20
Pitch, inches
Thickness of drive link, mm
No. of teeth on drive sprocket
0,375
1,3
6
Type of oil pump
Weight
Without bar and chain, kg
5,5
Note 1: Equivalent noise level is, according to
ISO 22868, calculated as the time--weighted
energy total for noise levels under various
working conditions with the following time dis-
tribution, 1/3 idle, 1/3 full load, 1/3 full speed.
BAR
CHAIN
Length
Inches
14
Pitch Max
Inches Tip Radius
0,375
0,375
7T Oregon 91VJ
7T Oregon 91VG
14
Note2: Equivalent vibration level is, according
to ISO 22867, calculated as the time--weighted
energy total for vibration levels under various
working conditions with the following time dis-
tribution: 1/3 idle, 1/3 full load, 1/3 full speed.
in/cm :dl
0,025/0,65
14/35:52
0,375
91VJ
0°
30°
5/32 / 4,0
0,050/1,3
80°
91VG
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Husqvarna AB
SE--561 82 Huskvarna
Sweden
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