McCulloch M3816, M4218 User Manual

INSTRUCTION MANUAL

IMPORTANT INFORMATION: Please read these instructions carefully

GB

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

MANUAL DE INSTRUCCIONES

INFORMACIÓN IMPORTANTE: Lea atentamentelasinstrucciones y

ES

asegúrese de entenderlas antes de utilizar esta aparato. Conserve las
instrucciones paralareferencia en el futuro.

MANUEL D’INSTRUCTIONS

RENSEIGNEMENTS IMPORTANTS: Avant d’utiliser cet appareil,

FR

veuillez lire atentivement lesinstructions etassurez--vous de les avoir
comprises. Conservez les instructions pour référence ultérieure.

MANUAL DO OPERADOR

INFORMAÇÕES IMPORTANTES: Queira lercuidadosamente estas

PT

instruções e tenha certezadeentendë--las antes de usar a serra e
guarde para consulta futura.

RU

545154793 Rev. 3 11/4/08 BRW

IDENTIFICATION (WHAT IS WHAT?)

Chain

Adjustment Tool

(Bar Tool)

Bar Sprocket
Hole

Bumper
Spike

Throttle
Lockout

Rear
Handle

Throttle
Trigger Choke Knob

Front Hand Guard

Chain

Cylinder Cover

Muffler

Bar Oil Fill Cap

Chain

Chain Adjustment Knob

Brake

Front Handle

Starter Rope

Starter Housing

Guide Bar

Chain Catcher

Idle Speed Screw

ON/STOPSwitch

Primer
Bulb

Fuel Mix Fill Cap

Chain
Direction
of Travel

IDENTIFICATION OF SYMBOLS

WARNING! This chain

saw can be dangerous! Care­less orimproper use cancause
serious or even fatal injury.

Always wear appropriateear
protection, eye protection
and head protection.

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
movesuddenlyupwardand backward,whichmaycausese­rious injury.

2

Read and understand the
instruction manual before
using the chain saw.

Sound power level

Sound pressure level
at 7,5 meters

Starting Reminder

IDENTIFICATION OF SYMBOLS

Move ON/STOP switch to
the ON position.

Slowly press primer bulb
6times.

Pull choke/fast idle lever
out to the full extent (to
the FULL CHOKE posi­tion).

SAFETY RULES

WARNING: Always disconnect

spark plug wire and place wire where it can­not contact spark plug to prevent accidental
starting when setting up, transporting, ad­justing or making repairs except carburetor
adjustments.
Because a chain saw is a high-speed wood­cutting 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 instruc­tions 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 instruc­tions found in this manual.

Hearing

Protection

Snug
Fitting

Clothing

Safety
Shoes

S Wearprotective gear. Always use steel-toed

safety footwear with non-slip soles; snug-fit­ting 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.

Safety Hat

Eye
Protection

Heavy Duty
Gloves

Safety Chaps

Pull the starter rope
sharply 5 times with your
right hand.

Push the choke/fast idle
lever in to the HALF
CHOKE position.

Pull the starter rope sharply
with your right hand until
the engine starts.

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 im­pairment.

S Keepall parts of your body away from the

chain when the engine is running.

S Keepchildren, bystanders, and animals a

minimumof 10 Meters away from the work
area. Donot 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 Carefullyplan your sawing operation inad-

vance. Donotstartcuttinguntilyouhavea
clear work area, securefooting,and,ifyou
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 per­sonal injury.
S Donot operate a chain saw with onehand.

Serious injury to the operator, helpers, by­standers or any combination of these per­sons may result from one-handed opera­tion. A chain saw is intended for two­handed use.

S Operatethe chainsaw 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.

3

S Makesure 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 Donot put pressure on the saw at the end of

the cut. Applying pressure can cause you to
lose control 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 com­pletely and securely assembled. Always
replace bar, chain, hand guard, or chain
brake immediately ifit 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

In this section, the safety features of

NOTE:

the chain saw and their function are explained.
For inspection and maintenance, see instruc­tions in the CHECKING, MAINTAINING AND
SERVICING CHAIN SAW SAFETY EQUIP­MENT 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 bereduced and the
risk of accidents can increase if machine
maintenance is not carried out correctly and
if service and/or repairs are not carried out
professionally. If you need further informa­tion, please contact your nearest service
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 chainbrake reduces the
risk of accidents, but only you can prevent
them.DONOTASSUME THATTHECHAIN
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
systemthatis designed to minimize vibra­tion and make operation easier.

SAFETY NOTICE:Exposure to vibrations

through prolonged use of gasoline powered
hand tools could cause blood vessel or nerve
damageinthe fingers, hands, and joints ofpeo­ple 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 in
skin color or texture, or loss of feeling in the fin­gers, hands, or joints, discontinue the use of
this tool and seek medical attention. An anti­vibration system does notguarantee 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. TheON/STOP switch

should be used to stop the engine.

CHECKING, MAINTAINI NG AND
SERVICING CHAIN SAW SAFETY
EQUIPMENT

WARNING: Never use a chain saw

with defective safety equipment. Safety
equipment must be inspected and main­tained. If your chain saw does not pass in­spection, take the saw to your nearest ser­vice 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 op­eration of the brake. For additional infor­mation, see OPERATING YOUR UNIT
section.

S Throttletriggerlock--out. Checkthatthe

throttletriggercannot beoperateduntilthe
throttle lock- -out is pressed.

S Chain catcher. Check that the chain

catcher is not damaged and is firmly at­tached 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 at­tached 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 fly­wheel to burst.

S Make certain the saw chain stops moving

when the throttle trigger is released. For
correction, refer to CARBURETOR AD­JUSTMENTS.

S Never modify your saw in any way. Use

only attachments supplied or specifically
recommended by the manufacturer.

S Keepthe 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 McCulloch accessories and re-

placement parts as recommended.

HANDLE FUEL WITH CAUTION

S Do not smoke while handling fuel or while

operating the saw.

S Eliminateall sources of sparks or flame in

the areas where fuel is mixed or poured.
Thereshouldbeno smoking, open flames,
orworkthatcouldcause sparks. Allow en­gine to cool before refueling.

4

S Mix and pour fuel in an outdoor area on bare

ground; store fuel in a cool, dry, well venti­lated place; and use an approved, marked
container for all fuel purposes. Wipe up all
fuel spills before starting saw.

S M ove 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 andfuelin anareawherefuel

vapors cannot reach sparks or open
flamesfrom water heaters, electric motors
or switches, furnaces, etc.

KICKBACK

WARNING: Avoid kickback which

can result in serious injury. Kickback is the
backward, upwardorsuddenforwardmotion
of the guide bar occurring when the saw
chainneartheupper tip of theguidebar con­tacts any object such as a log or branch, or
when the wood closes in and pinches the
saw chain inthecut.Contactingaforeignob­ject in the wood can also result in loss of
chain saw control.
S Rotational Kickback canoccurwhen the

moving chain contacts an objectattheup­per 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 to­ward 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
sawtomove inthe opposite direction ofthe
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 Beextremely 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 theengine atfull

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

Avoid Obstructions

Clear The
WorkingArea

REDUCETHECHANCEOF
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 Neverlet the moving chaincontact 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 looseordullchain can increase
the chance of kickback occurring. Follow
manufacturer’s chain sharpening and main­tenance instructions. Checktension at regu­lar intervals with the engine stopped, never
with the engine running. Make sure the bar
clamp nuts are securely tightened after ten­sioning 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

Stand to the left of
the saw

Never reverse
hand positions

Elbow locked

Thumb on underside of
handlebar

5

S Keepa good,firmgripon thesaw withboth

L

hands when the engine is running and
don’tlet go. A firm gripwillhelp you reduce
kickback and maintain control of the saw.
Keep the fingers of your left hand encir­cling and your left thumb under the front
handlebar.Keepyourrighthandcomplete­lyaroundtherearhandlewhether your are
right handedor left handed. Keep your left
arm straight with the elbow locked.

S Positionyour 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 Standwithyourweightevenlybalancedon

both feet.

S Stand slightly to the left side of the saw to

keep your body from being in a direct line
with the cutting chain.

S Do not overreach. You could be drawn or

thrown off balance and lose control of the
saw.

S Donot cut above shoulder height. It is diffi-

cult to maintain control of saw above
shoulder height.

KICKBACK SAFETY FEATURES

WARNING: The following features are

included on your saw to help reduce thehazard
of kickback; however, such features will not to­tally eliminate this dangerous reaction. As a
chain saw user, do not rely only on safety de­vices. You must follow all safety precautions,
instructions, and maintenance in this manualto
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

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.
ow-Kickback Chain

S Handguard, designed to reduce the

chance of your left hand contacting the
chainifyourhandslips offthe fronthandle­bar.

S Position of front and rear handlebars, de-

signedwithdistancebetweenhandlesand
“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 kick­back occurs.

WARNING: DO NOT RELY UPON

ANYOFTHE DEVICES BUILTINTOYOUR
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 achainbrake should be made by
an authorized servicing dealer. T ake your
unit to the place of purchase if purchased
from a servicing dealer,or to the nearest au­thorized master service dealer.
S Tipcontact in somecases may cause a light-

ning fast reverse REACTION, kicking the
guide bar up and back toward the operator.

S Pinchingthe saw chainalongthe top ofthe

guide bar may push the guide bar rapidly
back toward the operator.

S Eitherof these reactions maycause youto

lose control of the saw which could result
in serious injury. Do not rely exclusively
uponthesafety devices built into yoursaw.

Contoured Depth Gauge

Elongated Guard Link
Deflects Kickback
Force And Allows
Wood ToGradually
Ride Into Cutter

Symmetrical Guide Bar

Large Radius Tip

ASSEMBL Y

Protective gloves (not provided) should be
worn during assembly.

ATTACHING THE BUMPER
SPIKE

The bumper spike may be used as a pivot
when making a cut.

1. Lift adjustment knob handle and turn coun­terclockwise to loosen chain brake.

2. Align arrows by pressing tensioning le­ver down to install position (see illustra­tion). Remove chain brake from saw.

3. Attach the bumper spike with the two
screws as illustrated.

6

ATTACHING THE BAR & CHAIN (If

not already attached)

1. MoveON/STOPswitchtotheSTOP
position.

2. Make sure chain brake is disengaged
(seeCHAIN BRAKE intheOPERATION
section).

IMPORTANT: Before proceeding to next

step, ensure unit is onaflatsurfaceandinan
upright position as shown in illustration be­low. Chain will not tighten properly if the unit
is not in an upright position.

3. Lift adjustment knob handle and turn coun­terclockwise to loosen chain brake.

7. Carefully remove new chain from pack­age. Prepare the chain by checking the
proper direction. Without following theil­lustration, it is easy to place the chain on
the saw in the wrong direction. Use the
illustration of the chain to determine the
proper direction.

Tip of
Bar

Adjustment

Knob

Handle

Tensioning Lever

4. Align arrows by pressing tensioning le­ver down to install position (see illustra­tion). Remove chain brake from saw.

TENSIONINGLEVERIN

INSTALLPOSITION

5. Remove the plastic shipping spacer (if
present).

6. Slide guide bar behind clutch drum until
guide bar stops against clutch drum
sprocket.

LOOSEN

CUTTERS MUST FACE IN

DIRECTION OF ROTATION

Cutters

8. Place chain over and behind clutch, fitting
the drive links in the clutch drum sprocket.

9. Fit bottom of drive links between the
teeth in the sprocket in the nose of the
guide bar.

10. Fit chain drive links into bar groove.

11. Pull guide bar forward untilchain is snug
inguide bargroove. Ensure alldrivelinks
are in the bar groove.

TO REPLACE CHAIN BRAKE:

1. Align arrows on chain brake by pressing
tensioning lever down to install position
(see illustration).

2. Install chain brake. Turn adjustment
knob handle clockwise untilknob begins
to thread onto bolt.

3. Release tensioning lever. Chain will
tighten automatically.

4. While lifting tip of guide bar, turn adjust­ment knob handle clockwise to clamp
bar.Tighten until bar is clamped secure­ly. Hand tighten securely; do not use

tools to tighten!

Depth Gauge

Drive Links

Chain
Brake

Clutch Drum

TIGHTEN

7

5. Return adjustment knob handle to original
position. Ensure teeth of adjustment knob
handle are engaged with notches in the
chain brake and adjustment knob handle
is laying flat.

Teeth

Notches

CHAIN TENSION (Including units
with chain already installed)

WARNING: Wear protective gloves

whenhandlingchain. Thechainissharpand
can cut you even when it is not moving.
It is normal for a new chain to stretch during the
first 15 minutes of operation. You should re­check your chain tension frequently and adjust
the chain tension as required. Always check
chain tension each time you use and refuel
your saw or when any sag in the chain is noted.

1. MoveON/STOPswitchtotheSTOP
position.

2. Make sure chain brake is disengaged
(seeCHAIN BRAKE intheOPERATION
section).

IMPORTANT: Before proceeding to next

step, ensure unit is onaflatsurfaceandinan
upright position as shown in illustration.
Chainwillnottightenproperlyiftheunitis not
in an upright position.

3. Use the chain adjustment tool (bar tool)
to move chain around guide bar to en­sure kinks do not exist. The chainshould
rotate freely.

CHAIN SAW IN UPRIGHT POSITION

Guide

Bar

4. Lift adjustment knob handle and turn
counterclockwise 1 turn to loosen bar.
Chain will tighten automatically.

NOTE: If chain brake detaches from saw,

see TO REPLACE CHAIN BRAKE section.

Adjustment

Knob

Handle

Tensioning Lever

5. While lifting tip of guide bar, turn adjust­ment knob handle clockwise to clamp
bar. Tighten until bar is clamped secure­ly. Handtighten securely; do not use

tools to tighten!

6. Using chain adjustment tool (bar tool),
roll chain around guide bar to ensure all
links are in bar groove.

7. Return adjustment knob handle to original
position. Ensure teeth of adjustment knob
handle are engaged with notches in the
chain brake and adjustment knob handle
is laying flat.

WARNING: If the saw is operated

with a loose chain, the chain could jump off
the guide bar and result in serious injury.

WARNING: Muffler is very hotduring

and after use. Donot touch the muffler or al­low combustible material such as dry grass
or fuel to do so.

LOOSEN

Adjustment Knob

Chain Adjustment

Tool (Bar Tool)

OPERATING YOUR UNIT

BEFORE STARTING ENGINE

WARNING: Be sure to read the fuel

informationinthe safety rules before yoube­gin.Ifyoudonot understand thesafety rules,
do not attempt to fuel your unit. Contact an
authorized service dealer.

BAR AND CHAIN LUBRICATION

The bar and chain require continuous lubri­cation. Lubrication is provided by the auto­matic oiler system when the oil tank is kept
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 andchain
lubrication.

8

Oil Cap

Fuel mix ca p

FUELING ENGINE

WARNING: Remove fuel cap slowly

when refueling.
This engine is certified to operate on unleaded
gasoline. Before operation, gasoline must be
mixed with a good quality 2-cycle air-cooled
engine oil designed to be mixed at a ratio of
40:1. A 40:1 ratio is obtained by mixing 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.

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.Acidicgascandamagethe fuelsys­tem of an engine while in storage. To avoid
engine problems, empty the fuel systembe­fore storage for 30 days or longer. Drain the
gas tank, start the engine and let it run until
the fuel lines and carburetor are empty. Use
fresh fuel next season. Never use engine or
carburetor cleaner products in the fuel tank
or permanent damage may occur.

CHAIN BRAKE

Ensure chain brake is disengaged by pulling
the front hand guard back toward the front han­dle as far as possible. The chain brake must
be disengaged before cutting with the saw.

WARNING: The chain must not

move when the engine runs at idle speed. If
the chain moves at idle speed refer to CAR­BURETOR ADJUSTMENT within this
manual. Avoid contact with the muffler.Ahot
muffler can cause serious burns.
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.

Use only 40 --- 45 cm of rope per pull.
Hold saw firmly while pulling starter rope.

IMPORTANT POINTS TO REMEMBER

Whenpullingthestarter 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.

NOTE: Do not cut material with the choke/

fast idle lever at the FULL CHOKE position.

STARTI N G A COLD ENGINE (or a
warm engine after running out of
fuel)

: In the following steps, when the

NOTE

choke/fast idle lever is pulled out to the full
extent, the correct throttle setting for starting
is set automatically.

1. Move ON/STOP switch to the ON posi-

2. Slowly press primer bulb 6 times.

3. Pull out choke/fast idle to the full extent

4. Pull the starter rope sharply 5 times with

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

6. Pull the starter rope sharply with your

7. Allow the engine torunforapproximately

STARTING A WARM ENGINE

1. Move ON/STOPswitchtothe ONpositi o n .

2. Slowly press the primer bulb 6 times.

3. Pull the choke/fast idle lever out to the

4. Pull the starter rope sharply with your

5. Squeeze and release throttle trigger to

ON/STOP SWITCH

(SIDE VIEW)

ON

STOP

tion.

(to the FULL CHOKE position).
your right hand. Then, proceed to the

next step.

HALF CHOKE position.

CHOKE/FAST IDLE LEVER

(SIDE VIEW)

Choke/
fast idle lever

right hand until the engine starts.
30 seconds. Then, squeeze and release

throttletriggerto allow engineto return to
idle speed.

HALF CHOKE position.
right hand until the engine starts.
allow engine to return to idle speed.

OFF HALF

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

9

FULL

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
manytimes depending on how badly the unit
is flooded. Ifengine fails to start, refer to the
TROUBLESHOOTING TABLE.

CHAIN BRAKE

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 0,5 mm
thick. Repairs on a chain brake should be
made by an authorized service dealer. T ake
your unit to the place of purchase if purchased
from a servicing dealer,or tothe nearest autho­rized master service dealer.
S This saw is equipped with a chain brake.

The brake is designed to stop the chain if
kickbackoccurs.

S Theinertia activated chain brake is activated

if the front hand guard is pushed forward, ei­ther manually or by centrifugal force.

S Ifthe brake is already activated, it is disen-

gagedby pulling the front hand guard back
toward the front handle as far as possible.

S Whencutting with the saw,the chain brake

must be disengaged.

Disengaged

Engaged

Braking function control

CAUTION:

checked several times daily. The engine
mustberunning when performing thisproce­dure. This istheonly instance when the saw
should be placed on the ground with the en­gine running.
Place the saw on firm ground. Grip the rear
handlewith your righthand and thefronthan­dle 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.

The chain brake must be

Inertia activating function control

WARNING: When performing the fol-

lowing procedure, the engine must be turned
off.
Grip the rear handle with your right handand
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.

CUTTING METHODS

IMPORTANT POINTS

S Check chain tension before first use and af-

ter 1 minute of operation. See CHAIN TEN­SION in the ASSEMBLY section.

S Cut wood only. Do not cut metal, plastics,

masonry, non-wood building materials, etc.

S Thebumper spike may be used as a pivot

when making a cut.

S Stopthe saw if the chain strikes a foreignob-

ject. Inspect the saw and repairparts as nec­essary.

S Keepthechainout ofdirtand sand. Evena

smallamountof dirt will quickly dullachain
and increase the possibility of kickback.

S Practice cutting a few smalllogs using the

following techniques to get the “feel” of us­ing your saw before you begin a major
sawing operation.
S Squeeze the throttle trigger and allow the

engine to reach full speed before cutting.

S Begin cutting with the saw frame

against the log.

S Keep the engine at full speed the entire

time you are cutting.

S Allow thechainto cut foryou.Exertonly

light downward pressure.

S Release the throttle trigger as soon as

the cut is completed, allowing the en­gine to idle. If you run the saw at full
throttlewithoutacuttingload,unneces­sary wear can occur.

S Toavoidlosingcontrolwhen cut is com-

plete,do notput pressureon saw atend
of cut.

S Stopthe engine before settingthe saw down.

TREE FELLING TECHNIQUES

WARNING: Felling a tree requires

chain saw skills and experience. Inexperi­enced users should not felltrees. Do not at­tempt any task that makes you feel uncom­fortable or unsure.

WARNING: Donotcutnearbuildings

or electrical wires if you do not know the di­rection 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 ad­vance. 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.

10

Natural conditions that can cause a tree to
fall in a particular direction include:

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
slopingterrain. Use aplumborlevel to de­termine the direction of tree lean.

S Weightand 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
from the nearest person or other objects. En­gine noise can drown out a warning call.
Remove dirt, stones, loose bark, nails, sta­ples,andwirefromthetreewherecuts areto
be made.

Plan a clear retreat path

45_

2-1/2 tree lengths

Direction of Fall

FELLING LARGE TREES

(15cmindiameterorlarger)

The notch method is used to fell large trees.
Anotchis cut onthesideofthe treeinthede­sired direction of fall. After a felling cut is
made on the opposite side of tree, the tree
will tend to fall into the notch.

NOTCH CUT AND FELLING THE
TREE

S Make notch cut by cutting the top of the

notch first. Cut through
ofthe tree. Nextcomplete thenotchbycut­ting the bottom of the notch. See illustra­tion. Once the notch is cut remove the
notch of wood from the tree.

Final cut here. 5 cm above

First cut

Notch

Second cut

S After removing the wood from the notch,

make the felling cut on the opposite side of
thenotch. This is done by making a cutabout
two inches 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 falling in the wrong direction.

center of notch.

1/3 of the diameter

5cm

5cm

Hinge holds tree on stump and helps
control fall

Closing
of notch

NOTE: Before felling cut is complete, use

wedges to open the cut when necessary to
controlthedirectionof fall. Toavoid kickback
or chain damage, use wood or plastic
wedges, but never steel or iron wedges.
S Bealerttosignsthatthetreeisreadytofall:

cracking sounds, widening of the felling cut,
or movement in the upper branches.

S Astree starts to fall, stop saw, put it down,

and get away quickly on your planned re­treat path.

S DO NOT cut down a partially fallen tree with

your saw. Be extremely cautious with par­tially fallen trees that may be poorly sup­ported. 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.

Opening
of felling
cut

CUTTING A FALLEN TREE

(BUCKING)

Bucking is the term used for cutting a fallen
tree to the desired log length.

WARNING: Do not stand on the log

beingcut. Any portioncanrollcausinglossof
footing and control. Do not stand downhill of
the log being cut.

Important points

S Cut only one log at a time.
S Cut shattered wood very carefully; sharp

piecesofwood could beflungtowardoper­ator.

S Use a sawhorse to cut small logs. Never

allow another person to hold the log while
cuttingandneverholdthelog with yourleg
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 ex­posed and cleared logs first.

TYPES OF CU TTING USED FOR
BUCKING

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
untilthesawcan beremovedeasily. Restart
thesawandcarefully reenter the cut. Do not
attemptto restart your saw whenitispinched
or hung in a log.

Turn sa w OFF and use a plastic or
wooden wedge to force cut open.

11

Overcutting begins onthetop side of thelog
with the saw against the log. When overcut­ting use light downward pressure.

Overcutting

Undercuttinginvolvescutting on theunder­sideofthelog with top of saw against the log.
When undercutting use light upward pres­sure. Hold saw firmly and maintain control.
The saw will tend to push back toward you.

WARNING: Never turn saw upside

down to undercut. The saw cannot be con­trolled in this position.

First cut on pressure side of log

Second cut

First cut on pressure side of log

Undercutting

Second cut

BUCKING WITHOUT A
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.

BUCKING USING A LOG OR
SUPPORT STAND

S Remember your first cut is always on the

pressure side of the log.

S Your first cut should extend

diameter of the log.

S Finish with your second cut.

Usingalogforsupport

2ndCut

2ndCut

st

1

1/3 of the

1stCut

Cut

Using a support stand

nd

Cut

2

st

1

Cut

1stCut

nd

Cut

2

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.

WARNING: Neverclimbintoatreeto

limb or prune. Do not stand on ladders, plat­forms, a log, or in any position which can cause
you to lose your balance or control of the saw.

IMPORTANT POINTS

S Watch out for springpoles. Use extreme

caution when cutting small size limbs. Slen­der material may catch the saw chain andbe
whipped toward you or pull you off balance.

S Be alert for springback. Watch out for

branches that are bent or under pressure.
Avoidbeing struck by the branch or the saw
when the tension in the wood fibers is re­leased.

S Keep a clear work area. Frequently clear

branches out of the way to avoid tripping
over them.

LIMBING

S Alwayslimb atreeafter it is cutdown. Only

then can limbing be done safely and prop­erly.

S Leave the larger limbs underneath the

felled tree to support the tree as you work.

S Startat base of the felled treeandwork 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.

S Remove larger, supporting branches with

thecuttingtechniques describedinBUCK­ING WITHOUT A SUPPORT.

S Always use an overcut to cut small and

freely hanging limbs. Undercutting could
cause limbs to fall and pinch saw.

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.

12

S Make your fist cut 1/3 of the way through

the bottom of the limb.

S Nextmakea2ndcut all the way through

the limb. Then cut a third overcut leaving

a1to2 inchcollarfromthe trunkofthetree.

SERVICE AND ADJUSTMENTS

WARNING: Improper maintenance

could result in serious engine damage or in se­rious injury.

WARNING: Disconnect the spark

plugbeforeperforming maintenance, except
for carburetor adjustments.
We recommend all service and adjustments
not listed in this manual be performed by an
Authorized Service Dealer.

MAINTE NANCE 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 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 Yea r l y.
Replace fuel filter Ye a r ly...

*HoursofOperation

AIR FILTER

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:

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 and sawdust from falling into
the carburetor chamber when the cover
is removed.

2. Remove the parts as illustrated below.

3. Wash the filter in soap and water. Rinse
in clean cool water. Air dry completely
before reinstalling.

4. Reinstall parts.

Second cut

Third cut

Collar

Air Filter

BAR MAINTENANCE

If your saw cuts to one side, hasto beforced
throughthecut, orbeenrunwithanimproper
amount of bar lubrication it may be neces­sary toservice yourbar. Awornbar will dam­age 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:
S Move ON/STOP switch to the STOP posi-

tion.

S Loosen and remove chain brake nuts and

chain brake. Remove bar and chain from
saw.

S Cleanthe oil holes and bar groove after each

5 hours of operation.

Remove Sawdust From

Guide Bar Groove

Oil Hole

S Burring of guide bar rails is a normal

process of rail wear. Remove these burrs
with a flat file.

S Whenrail top is uneven, use a flatfiletore-

store square edges and sides.

First cut

Pruning technique

Cylinder Cover
Screws

File Rail Edges

and Sides

Square

Correct GrooveWorn Groove

Cylinder
Cover

13

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
barspecifiedforyour saw in the repair parts list
or on the decal located on the chain saw.

SPARKPLUG

The spark plug should be replaced each
year to ensure the engine starts easier and
runs better. Ignition timing is fixed and non­adjustable.

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.

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.

6. Reinstall the spark plug boot.

7. Reinstall the cylinder cover and 3
screws. Tighten securely.

Spark

Plug

Spark Plug Boot

CHAIN SHARPENING

Chain sharpening is a complicated task that
requires special tools. We recommend that
you refer chain sharpening to a professional
chain sharpener.

Cylinder Cover

Screws

Cylinder
Cover

CARBURETOR ADJUSTMENTS

WARNING: The chain will be moving

during most of this procedure. Wear your pro­tective equipment and observe all safety pre­cautions. 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 Chainmoves at idle. See IDLE SPEED--T

adjusting procedure.

S Sawwill not idle. See IDLESPEED--T ad-

justing procedure.

Idle Speed --- T

Allow engine to idle. If the chain moves, idle
istoo fast. If the enginestalls, idleistooslow.
Adjust speed until engine runs without chain
movement (idle too fast) or stalling (idle too
slow). The idle speed screw is located inthe
area above the primer bulb and is labeled T.
S Turnidle speed screw (T) clockwise to in-

crease engine speed.

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.
Storeunit withallguards in place. Position so
that any sharp object cannot accidentally
cause injury to passersby. Store the unit out
of reach of children.
S Before storing, drain all fuel from the unit.

Start engine and allow to run until it stops.

S Cleanthe 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 Donotstoretheunit or fuelina closedarea

where fuel vapors can reach sparks or an
openflamefromhotwater heaters,electric
motors or switches, furnaces, etc.

S Store in a dry area out of the reach of chil-

dren.

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.

CAUTION: It is important to prevent

gum deposits from forming in essential fuel
system parts such as the carburetor, fuel fil­ter,fuel hose, or fuel tank during storage. Al­cohol blended fuels (called gasohol or using
ethanol or methanol) can attract moisture
which leads to fuel mixture separation and
formationofacids during storage. Acidic gas
can damage the engine.

14

TROUBLESHOOTING TABLE

WARNING: Always stop unit and disconnect spark plug before performing all of

therecommendedremediesbelow except remedies thatrequire operation of the unit.

TROUBLE C AUSE REMEDY

Engine will not
start or will run
only a few
seconds after
starting.

Engine will
not idle
properly.

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

Engine
smokes
excessively.

Chain moves
at idle speed.

1. Ignition switch off.

2. Engine flooded.

3. Fuel tank empty.

4. Spark plug not firing.

5. Fuel not reaching
carburetor.

1. Idle speed requires
adjustment.

2. Carburetor requires

adjustment.

1. Air filter dirty.

2. Spark plug fouled.

3. Chain brake engaged.

4. Carburetor requires

adjustment.

1. Toomuch oil mixed with

gasoline.

1. Idle speed requires

adjustment.

2. Clutch requires repair.

1. Move ignition switch to ON.

2. See “Difficult Starting” 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.

1. See “Carburetor Adjustment” in the
Service and Adjustments Section.

2. Contact an authorized service dealer.

1. Clean or replace air filter.

2. Clean or replace plug and regap.

3. Disengage chain brake.

4. Contact an authorized service dealer.

1. Empty fuel tank and refill with
correct fuel mixture.

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 Outdoor Products Italia, S.p.A., Valmadrera, Italy. Tel:

[phone],declare that the chain saw models McCulloch M3816 and M4218
CSI---AV from serial numbers 2008--040(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 3 May 1989 “relating to electromagnetic compatibility” 89/336/EEC, 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 dB(A), the guaranteed
sound power is 118dB(A) and the net power is 1,6 kW or 1,7 kW.

Thefollowingstandards have beenapplied: 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--754 50 Uppsala, Sweden, has carried out EC type approval. The certificate(s) is
numbered: 404/02/901.

ThesuppliedChainSawconformswith thesamplethatunderwenttheEC type approval.

08--02--09

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

15

TECHNICAL DATA SHEET

Engine M3816 M4218

Cylinder volume, cm

3

38 42
Stroke, mm 32 32
Idle speed, rpm 3,000 3,000
Recommended max.
spee d, unloaded ,rpm 13,000 13,000
Power,kW 1,6 1,7

Ignition system

Manufacturer Walbro
Type of ignition system CD
Spark plug Champion
Electrode gap, mm 0,5

Fuel and lubrication system

Manufacturer Walbro
Carburetor type WT--662
Fuel capacity, litre 0,38
Oil pump capacity at
8500 rpm, ml/min 4 -- 8
Oil capacity, litre 0,2
Type of oil pump Automatic

Weight

Without bar and chain, kg 4,8

BAR CHAIN

Length Pitch Max
Inches Inches Tip Radius

16 0,375 7T Oregon 91VJ
18 0,375 7T Oregon
16 0,375 7T Oregon
18 0,375 7T Oregon

91VJ
91VG
91VG

Noise levels M3816 M4218

Equivalent (see note 1)
noise pressure level at
operator’s ear, measured
according to relevant
international standards,
dB(A) 97 97
Equivalent (see note 1)
noise power level,
measured according to
relevant international
standards, dB(A) 106 106

Vibration levels

(see note 2)
Front handle, m/s
Rear handle, m/s

2

2

5,5 5,5
8,5 8,5

Chain/bar

Standard bar length, in/cm 16/40 18/45
Recommended bar lengths,
in/cm 16/40 18/45
Usable cutting length, in/cm 15,5/39 17,5/44
Chain speed at maximum
power, m/sec 19 19
Pitch, inches 0,375 0,375
Thickness of drive link, mm 1,3 1,3
No. of teeth on drive sprocket 6 6
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 distribution,
1/3 idle, 1/3 full load, 1/3 full speed.
Note 2: 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 dis­tribution: 1/3 idle, 1/3 full load, 1/3 full speed.

0,375 85° 30° 0°0,050/1,3 5/32 / 4,0 0,025/0,6591VJ

0,375 0,050/1,3 5/32 / 4,0 85° 30° 0° 0,025/0,65

91VG

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

ViaComo72
Valmadrera, Lecco
ITALY I--23868

16

Inch/mm : dl

16/40 : 56
18/45 : 62

16/40 : 56
18/45 : 62

STATEMENT OF WARRANTY

Husqvarna Outdoor Products provides war­ranty to the initial purchaser for all products
that are sold by an authorised Husqvarna
Outdoor Products Dealer.
The warranty provides the purchaser with a
guarantee against faulty workmanship in
manufacture and/or defective components.
If any product supplied by Husqvarna Out­doorProducts is found to be defective dueto
faulty manufacture within the warranty peri­od,Husqvarna Outdoor Products through its
Authorised Servicing Dealers will effect the
repair or replacement at their discretion to
the customer, free of charge providing;
S The fault is reported directly to the Autho-

rised Servicing Dealer.

S Proof of purchase is provided.
S Thefault is not caused by misuse, neglect

or faulty adjustment by the user.

S The failure has not occurred through nor-

mal wear and tear.

S The product has not been serviced, re-

paired or alterations made by any person
not authorised by Husqvarna Outdoor
Products.

S The machine has not been used for hire.

Product WarrantyPeriod

Non--Powered Push Mowers 12 Months 90 Days
Electric and Petrol Walk--Behind Mowers 12 Months 90 Days
Electric and Petrol Chainsaws 12 Months 90 Days
Electric and Petrol Trimmers 12 Months 90 Days
Electric and Petrol Blowers 12 Months 90 Days
Petrol Ride--on Mowers 12 Months 90 Days

Nothing contained in this warranty is in­tended to purport to restrict, modify or ex­clude the operation of any legislation in the
State where the product was purchased.
The following items are not covered by this
warranty:
S Normal customer maintenance items

which become worn through normal regu­lar use, including, but not limited to, belts,
blades, blade adapters, globes, filters,
guide bars, lubricants, rewind springs,
saw chain, spark plugs, starter ropes, and
tines;

S Natural discolouration of material due to

ultraviolet light;

S Engine and drive systems not manufac-

tured by Husqvarna Outdoor Products,
these items are covered by the respective
original equipment manufacturers warran­ty, all claims must be sent to the appropri­ate manufacturer.

Domestic Commercial

17