Echo CS-346 User manual

WARNING DANGER
Readrulesforsafeoperationandinstructionscarefully.ECHOprovidesanInstruction
Manual and a Safety Manual. Both must be read and understood for proper and safe
operation.
Chain Saw
Instruction Manual
MODELS : CS-301
CS-341
CS-346
X7503204904 X750006814
11/06

2
RULES FOR SAFE OPERATION
A. Kickback Safety Precaution for Chain Saw Users
B. Other Safety Precautions
1. Do not operate a chain saw with one hand! Se-
rious injury to the operator, helpers, bystand-
ers, or any combination of these persons may
result from one-handed operation. A chain saw
is intended for two-handed use.
2. Do not operate a chain saw when you are fa-
tigued.
3. Use safety footwear; snug-fitting clothing; pro-
tective gloves; and eye, hearing and head pro-
tection devices. Wear protective hair covering
to contain long hair.
4. Use caution when handling fuel. Move the chain
saw at least 3 m (10 feet) from the fueling point
before starting the engine.
5. Do not allow other persons to be near the chain
saw when starting or cutting with the chain saw.
Keep bystanders and animals out of the work
area.
6. Do not start cutting until you have a clear work
area, secure footing, and a planned retreat path
from the falling tree.
Copyright© 2006 By Echo, Incorporated
All Rights Reserved.
WARNING!
KICKBACK may occur when the nose or tip of the
guide bar touches an object, or when the wood
closes in and pinches the saw chain in the cut.
Tip contact in some cases may cause a lightning
fast reverse REACTION, Kicking the guide bar up
and back towards the operator. Pinching the saw
chain along the top of the guide bar may push the
guide bar rapidly back towards the operator. Ei-
ther of these reactions may cause you to lose con-
trol of the saw which could result in serious per-
sonal injury.
The Kick Guard ®device is not installed on the
guide bar when you purchase your ECHO chain
saw. The Kick Guard ® can be used in a majority of
cutting operations, and is especially recommended
for beginners, homeowners, or chain saw novices.
Most cutting operations can be accomplished with
the Kick Guard®in place.
Do not rely exclusively upon the safety devices built
into your saw. As a chain saw user, you should take
several steps to keep your cutting jobs free from
accident or injury.
1. With a basic understanding of kickback, you
can reduce or eliminate the element of surprise.
Sudden surprise contributes to accidents.
2.Keep a good firm grip on the saw with both
hands, the right hand on the rear handle, and
the left hand on the front handle, when the en-
gine is running. Use a firm grip with thumbs and
fingers encircling the chain saw handles. A firm
grip will help you reduce kickback and main-
tain control of the saw. Don’t’ let go.
3. Make sure that the area in which you are cut-
ting is free from obstructions. Do not let the
nose of the guide bar contact a log, branch, or
any other obstruction which could be hit while
you are operating the saw.
4. Cut at high engine speeds.
5. Do not overreach or cut above shoulder height.
6. Follow manufacturer’s sharpening and main-
tenance instructions for the saw chain.
7. Only use replacement bars and chains speci-
fied by the manufacturer or the equivalent.

3
7. Keep all parts of your body away from the saw
chain when the engine is running.
8. Before you start the engine, make sure that
the saw chain is not contacting anything.
9. Carry the chain saw with the engine stopped,
the guide bar and saw chain to the rear, and
the muffler away from your body.
10.Do not operate a chain saw that is damaged,
improperly adjusted, or not completely and
securely assembled. Be sure that the saw
chain stops moving when the throttle control
trigger is released.
11. Shut off the engine before setting the chain saw
down.
12.Use extreme caution when cutting small size
brush and saplings because slender material
may catch the saw chain and be whipped to-
ward you or pull you off balance.
13.When cutting a limb that is under tension, be
alert for spring back so that you will not be
struck when the tension in the wood fibers is
released.
14. Keep the handles dry, clean, and free of oil or
fuel mixture.
15.Operate the chain saw only in well-ventilated
areas.
16.Do not operate a chain saw in a tree unless
you have been specifically trained to do so.
17. All chain saw service, other than the items listed
in the Instruction Manual maintenance instruc-
tions, should be performed by competent chain
saw service personnel. (For example, if im-
proper tools are used to remove the flywheel
or if an improper tool is used to hold the fly-
wheel in order to remove the clutch, structural
damage to the flywheel could occur and could
subsequently cause the flywheel to burst.)
18.When transporting your chain saw, use the
appropriate guide bar scabbard.
19. Spark arrestor mufflers approved to SAE Stan-
dard J335b are Standard on ECHO Chain
saws to reduce the possibility of forest fires.
Do not operate the chain saw with a loose or
defective muffler. Do not remove the spark ar-
restor screen.
WARNING DANGER
•During operation, the muffler or catalytic muffler and surrounding cover become hot.
•Never suspend the saw on a lanyard with the engine running.
•Always use the saw from the right-hand side of your body – NEVER from the left side.
•Always wear proper safety clothing to protect your lower body from sharp saw chain and hot
muffler.
•Always keep exhaust area clear of flammable debris during transportation or when storing,
otherwise serious property damage or personal injury may result.
WARNING DANGER
Using improper replacement components or removing safety devices may result in serious or fatal injury.

4
CONTENTS
Page
Rules for Safe Operation .................................................................................................. 2
Technical Data ................................................................................................................. 5
Emission Data ................................................................................................................. 6
Description ...................................................................................................................... 6
Nomenclature of Parts ...................................................................................................... 7
Preparation for Use .......................................................................................................... 9
Fuel and Lubricant.......................................................................................................... 10
Operation ....................................................................................................................... 12
Cutting Instructions ......................................................................................................... 14
Maintenance and Care ................................................................................................... 17
Chain and Guide Bar Combinations ............................................................................... 22
Troubleshooting .............................................................................................................. 24
Storage .......................................................................................................................... 25
Correct Use of Chain Brake ........................................................................................... 26
Servicing Information ...................................................................................................... 28
Carburetor adjustment
- Idle speed
Carburetor adjustment
- High speed mixture
Wear eyes, ears and head
protection
Carburetor adjustment
- Low speed mixture
Gasoline and oil mixture
Symbol form/shape Symbol description/application Symbol form/shape Symbol description/application
Chain oiler adjustmentChain brake operation
Chain oil pump
Chain oil fill
Emergency stop
Choke control “Cold Start”
position (choke closed)
STOP
Read and understand
Operator's Manual.
INTERNATIONAL SYMBOLS

5
TECHNICAL D ATA
* Technical data subject to change without notice.
IMPORTANT
This spark ignition system complies with Canadian ICES-002.
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6
DESCRIPTION
The ECHO product you purchased has been factory pre-assembled for your convenience. Due to packaging
restrictions, guide bar and saw chain installation and other assembly may be necessary.
After opening the carton, check for damage. Immediately notify your retailer or ECHO Dealer of damaged or
missing parts. Use the contents list to check for missing parts.
CONTENTS
1 - Power Head
1 - Guide Bar
*1 - Kick Guard
1 - Hex Head Bolt
1 - Hex Nut
*1 - Saw Chain
1 - Instruction Manual
1 - Safety Manual
1 - Warranty Registration Card
1 - Limited Warranty Statement
1 - T-Wrench
1 - Echo Power Blend TM 2-stroke oil sample
IMPORTANTENGINE INFORMATION
ENGINE FAMILY: 6EXHS.0334CA DISPLACEMENT: 30.1 CC
EMISSION COMPLIANCE PERIOD: 300 HOURS
THIS ENGINE MEETS U.S. EPA PH2 AND 2005 - 2006
CALIFORNIA EMISSION REGULATIONS FOR SOREs.
REFER TO OWNER'S MANUAL FOR MAINTENANCE
SPECIFICATIONS AND ADJUSTMENTS.
EMISSION D ATA
EMISSION CONTROL
EPA PHASE 2
The emission control system for these engines are
EM/TWC (Engine Modification and Catalyst).
An Emission Control Label is located on the
engine. (This is an EXAMPLE ONLY, information
on label varies by engine FAMILY).
PRODUCT EMISSION DURABILITY
The 300 hour emission durability compliance period is the time span selected by the manufacturer certify-
ing the engine emissions output meets applicable California and/or U.S. EPA emissions regulations,
provided that approved maintenance procedures are followed as listed in the Maintenance Section of this
manual.
* The machine may be delivered with guide bar and saw
chain assembled.
*

7
NOMENCLATURE OF PARTS
CS-301, CS-341
P/N 89016006361
P/N 89017639431
CAUTION/ATTENTION
Hearing protectors meeting the requirements
of CSA Standard Z94.2 should be worn.
Los protecteurs auditifs pouvant etre porter,
doivent recontrer les normes CSA Standard
Z94.2.
REPLACEMENT BAR AND CHAIN
Note:There may be other replacement
components for achieving
kickback protection. For details,
please refer to the chain and bar
combination sheet shown in the
instruction manual.
P/N X524000792
GUIDE BAR*CHAIN*
PART NO. TYPE LINKS
12” 12A0CD3745 OREGON 91VG 45
14” 14A0CD3752 OREGON 91VG 52
16” 16A0CD3757 OREGON 91VG 57
P/N X505002070
P/N X524000990
1. Hand guard
(Chain brake locking lever)
2. Throttle control lockout
3. Throttle control trigger
4. Sprocket guard
5. Chain catcher
6. Air cleaner cover
7. Purge bulb
8. Guide bar
9. Saw chain
10. Front handle
11. On / Off switch
12. Fuel tank cap
13. Pull starter
14. Oil tank cap
15. Throttle control latch
16. Tip guard
17. Catalytic muffler
18. Lanyard ring
19. Spark Plug
1
2
3
4
5
6
7
8
910
11
12
13
14
15 16
17
18
19

8
P/N X505002070
1. Front handle
2. Hand guard
(Chain brake actuating lever)
3. Saw chain
4. Guide bar
5. Chain catcher
6. Sprocket guard
7. Muffler
8. Rear hand guard
9. Throttle control lockout
10. Throttle control trigger
11. Air cleaner cover
12. Chain tension adjustment screw
13. Pull starter
14. Throttle control latch
15. On / Off switch
16. Oil tank cap
17. Fuel tank cap
18. Purge bulb
19. Kick guard
20. Spark Plug
21. Guide Bar Nuts
22. Rear Handle
23. Choke
P/N 89016006361
P/N 89017639431
CAUTION/ATTENTION
Hearing protectors meeting the requirements
of CSA Standard Z94.2 should be worn.
Los protecteurs auditifs pouvant etre porter,
doivent recontrer les normes CSA Standard
Z94.2.
TOAVOID KICKBACK
POUR ÉVITER LES REBONDISSEMENTS
1. Eviter touit contact entre le nez du
guide-chaine et un objet quelconque.
2. Tout contact du nez peut provoquer
un mouvement brusque vers le haut
ou vers les bas et entrainer de graves
blessures.
3. Toujours employer lex deux mains
pour opérer la scie á chaine.
1. Contact of the guide bar tip with any
object should be avoided.
2. Tip contact may cause the guide bar to
move suddenly upward and backward
which may cause serious injury.
3. Always use two hands when operating
the chain saw.
P/N 89035339530
P/N 89032439630
Note: There may other replacement com-
ponents for achieving kickback protection.
For details, please refer to the chain and
bar combination sheet shown in the
operator’s manuals.
Remarque: Il y peut y avoir d’autres
composantes de remplacement qui
protégent en cas de rebondissement. Pour
plus de détails, se référer á la feuille sur les
combinaison de guide de chaine du manuel
de l’utilisateur.
REPLACEMENT BAR AND CHAIN
REMPLACEMENT DU GUIDE ET DE LA CHAINE
GUIDE BAR P/NO. CHAIN TYPE CKA
GUIDE PIECE NO. TYPE DE CHAINE
12” 12A0CD3745OREGON 91VG 45 17.8
14” 14A0CD3752OREGON 91VG 52 18.5
16” 16A0CD3757OREGON 91VG 57 18.3
CKA means Computed Kickback Angle.
CKA signifie anle de rebondissement calcule.
P/N X524000812
CS-346
15
14
17
18
13
19
CS-306
12
3
4
5
7
8
9
6
10
13
20 11
12
21
22
23
1
2
9
22
10
19
16

9
PREPARATION FOR USE
H
G
I
J
WARNING
IMPROPER CLUTCH COVER ASSEMBLY CAN
RESULT IN SERIOUS INJURY, AND WILL CAUSE
SEVERE SAW DAMAGE IF UNIT IS STARTED.
NEVER START OR OPERATE SAW IF BRAKE BAND
IS NOT IN PLACE ON CLUTCH DRUM. ALWAYS
CHECK CHAIN BRAKE OPERATION AFTER RE-
PLACING COVER. DO NOT USE SAW IF CHAIN
BRAKE DOES NOT FUNCTION PROPERLY.
7. Turn saw over and check brake band for correct position
around clutch drum. If brake band is not in place around
drum, remove clutch cover, make sure brake is released,
and reinstall.
KICK GUARD® TO BAR INSTRUCTIONS
For saws with Kick Guard®P/N 2894901 and symmetri-
cal or asymmetrical low-kick type guide bars.
1. Install bolt (A) in rear hole (B) of Kick Guard®and
through front hole (C) in guide bar.
2. IMPORTANT:Dimple in Kick Guard®(D) must engage
recess in guide bar (E).
3. Tighten nut (F) and bolt (A) until snug. Make certain Kick
Guard®is flush against guide bar.
GUIDE BAR AND SAW CHAIN-INSTALL/
REMOVE
WARNING DANGER
Saw Chain is sharp! Always wear gloves when handling
assembly, otherwise serious personal injury may result.
NOTE
Move chain brake lever fully rearward to remove or install
clutch cover to saw.
IMPORTANT
Always loosen guide bar nuts before turning chain
tension adjuster, otherwise clutch cover and tensioner
will be damaged.
1. Remove spark plug lead.
2. Remove two guide bar nuts and remove guide bar cover.
Turn tension adjustment screw counterclockwise 2 to 3
turns if bar and chain are installed.
3. Remove guide bar and saw chain if necessary.
NOTE: See “MAINTENANCE AND CARE” instructions
for guide bar, sprocket, and saw chain maintenance.
4. Mount guide bar (G) on studs, and slide toward sprocket
to make saw chain installation easier.
5. Install saw chain (H) as shown, with cutters on top of
guide bar facing forward.
6. Align holes of clutch cover (J) with guide bar studs, and
tensioner pin (I) with lower guide bar adjuster hole. Install
cover. Tighten guide bar nuts finger tight.

10
ADJUSTMENT,CHAIN TENSION
IMPORTANT
Always loosen guide bar nuts before turning chain
tension adjuster, otherwise clutch cover and tensioner
will be damaged.
1. Remove spark plug lead.
2. Loosen two guide bar nuts, if necessary.
3. Hold the bar nose up, and turn the adjuster screw (L)
clockwise until chain fits snugly against underside of
bar.
4. Tighten both guide bar nuts with bar nose held up.
5. Pull the saw chain around the guide bar by hand.
Reduce chain tension, if you feel tight spots.
6. When chain is properly tensioned, tighten guide bar
nuts securely - 90 – 110 kgf/cm (80 – 95 in. lbs.).
7. Keep chain properly tensioned at all times.
NOTE
All chains require frequent adjustments.
L
FUEL AND LUBRICANT
NOTICE: Use of unmixed, improperly mixed, or fuel older than 90 days, (stale fuel), may cause hard starting, poor
performance, or severe engine damage and void the product warranty. Read and follow instructions in the Storage
section of this manual.
FUEL STATEMENT
WARNING DANGER
Alternative fuels, such as E-20 (20% ethanol), E-85 (85% ethanol) or any fuels not meeting ECHO requirements are
NOT approved for use in ECHO 2-stroke gasoline engines. Use of alternative fuels may cause performance prob-
lems, loss of power, overheating, fuel vapor lock, and unintended machine operation, including, but not limited to,
improper clutch engagement. Alternative fuels may also cause premature deterioration of fuel lines, gaskets,
carburetors and other engine components.
GASOLINE - Use 89 Octane [R+M/2] (mid grade or higher) gasoline or gasohol known to be good quality. Gasohol may
contain up to 10% Ethyl (grain) alcohol or 15% MTBE (methyl tertiary-butyl ether). Gasohol containing methyl (wood)
alcohol is NOTapproved.
Two Stroke Oil - A two-stroke engine oil meeting ISO-L-EGD (ISO/CD 13738) and J.A.S.O. FC Standards must be
used. Echo brand premium Power Blend TM Universal 2-Stroke Oil meets these standards. Engine problems due to
inadequate lubrication caused by failure to use an ISO-L-EGD and J.A.S.O. FC certified oil, such as Echo premium
Power BlendTM, will void the two-stroke engine warranty. (Emission related parts only are covered for two years, regard-
less of two-stroke oil used, per the statement listed in the Emission Defect Warranty Explanation.)
IMPORTANT
Echo premium Power BlendTM Universal 2-Stroke Oil may be mixed at 50:1 ratio for application in all Echo engines
sold in the past regardless of ratio specified in those manuals.

11
Handling Fuel
WARNING DANGER
Fuel is VERY flammable. Use extreme care when mixing,
storing or handling or serious personal injury may result.
• Use an approved fuel container.
• DO NOT smoke near fuel.
• DO NOT allow flames or sparks near fuel.
• Fuel tanks/cans may be under pressure. Always loosen
fuel caps slowly allowing pressure to equalize.
• NEVER refuel a unit when the engine is HOT or RUN-
NING!
• DO NOT fill fuel tanks indoors. ALWAYS fill fuel tanks
outdoors over bare ground.
• DO NOT overfill fuel tank. Wipe up spills immediately.
• Securely tighten fuel tank cap and close fuel container
after refueling.
• Inspect for fuel leakage. If fuel leakage is found, do not
start or operate unit until leakage is repaired.
• Move at least 3m (10 ft.) from refueling location before
starting the engine.
Mixing Instructions
1. Fill an approved fuel container with half of the required
amount of gasoline.
2. Add the proper amount of 2-stroke oil to gasoline.
3. Close container and shake to mix oil with gasoline.
4. Add remaining gasoline, close fuel container, and remix.
IMPORTANT
Spilled fuel is a leading cause of hydrocarbon emissions.
Some states may require the use of automatic fuel shut-
off containers to reduce fuel spillage.
After use
• DO NOT store a unit with fuel in its tank. Leaks
can occur. Return unused fuel to an approved
fuel storage container.
Storage - Fuel storage laws vary by locality.
Contact your local government for the laws
affecting your area. As a precaution, store fuel in
an approved, airtight container. Store in a well-
ventilated, unoccupied building, away from sparks
and flames.
IMPORTANT
Stored fuel ages. Do not mix more fuel than
you expect to use in thirty (30) days, ninety
(90) days when a fuel stabilizer is added.
IMPORTANT
Stored two-stroke fuel may separate.
ALWAYS shake fuel container thoroughly
before each use.
CHAIN LUBRICANT
Proper lubrication of the chain while in operation reduces friction
between the chain and the guide bar to a minimum and assures
a longer service life.
• use bar and chain oil of high quality for this purpose.
• Do not use used or reclaimed oil to avoid various oiler
problems.
• Use ECHO bar and chain oil.
• When ECHO bar and chain oil is not available:
Use motor oil, etc.
• Use bar and chain oil of the following grades:
SAE NO. 30 ..... in summer
SAE NO. 10 ..... in winter or when cutting resinous trees.
• When refueling, also refill chain oil.
FUEL TANK OIL TANK
TANK INDICATION
Fuel Mix Chart
50:1
).S.U()CIRTEM(
SAGLIOSAGLIO
.laG.zo.lFretiL.cc
1
2
5
6.2
1.5
8.21
4
8
02
08
061
004

12
CS-346
CS-301
CS-341
A
A
B
C
Securely hold the saw.
OPERATION
STARTING COLD ENGINE
WARNING DANGER
Make sure bar and chain are not touching anything when
starting the saw.
1. Move chain brake lever fully forward to lock chain brake
before starting.
2. Fill the fuel tank with fuel. Do not over fill.
3. Fill the chain oil tank with lubricant. Do not over fill.
4. Lay unit on a flat, clear area and keep bar and chain clear
of all obstacles.
5. Turn switch (A) to “RUN” position (I).
6. Pull choke (B) all the way out (closed position).
7. Push purge bulb (C) 10 times.
8. Pull starter handle several times until first firing sound is
heard. (Secure unit on ground with your knee or foot.) (5
- 6 pulls maximum.)
9. Push choke (B) all the way in. (open position)
10. Pull starter handle again.
NOTE
If engine does not start after 5 pulls, repeat instructions.
WHEN ENGINE IS HARD TO START
WARNING DANGER
Clutch engages and chain may rotate when engine is started
with throttle control latch engaged. Never use the throttle
control latch for cutting. Use only when starting the engine.
1. Ensure that there is fuel and chain oil in the tanks.
2. Move chain brake lever fully forward to lock chain brake
before starting.
3. Lay unit on a flat, clear area and keep bar and chain clear
of all obstacles.
4. Press throttle control lockout down, squeeze throttle
trigger, and push in throttle control latch.
5. Turn switch (A) to “RUN” position (I).
6. Pull starter handle.
7. When engine starts, immediately squeeze throttle trigger
to release the latch otherwise damage to clutch may
result.
NOTE
Do not pull starter rope out to the maximum possible
position.
Do not allow recoil handle to snap back against the
casing.

13
CS-346
CS-301
CS-341
A
A
CS-346
CS-301
CS-341
AA
STARTING WARM ENGINE
1. Ensure that there is fuel and chain oil in the tanks. (If fuel tank
was emptied during previous operation, refill tank and push
purge bulb 10 times.)
2. Move chain brake lever fully forward to lock chain brake before
starting.
3. Lay unit on a flat, clear area and keep bar and chain clear of all
obstacles.
4. Turn switch (A) to “RUN” position (I).
5. Pull starter handle.
6. Choke may be used if necessary, but be sure to push it back
on first firing sound.
NOTE
If engine does not start after 5 pulls, use cold start procedure.
RUNNING
WARNING DANGER
The saw chain should not move at idle, otherwise serious personal
injury may result.
NOTE
If saw chain moves adjust carburetor according to “Carburetor
Adjustment” instructions in this manual, or see your dealer.
• After engine starts, allow it to return to idle.
• Move chain brake lever fully rearward to unlock chain brake.
• Press throttle control lockout then gradually squeeze throttle
trigger to increase engine speed.
• Saw chain starts moving when the engine reaches approxi-
mately 4200 rpm.
• Ensure proper acceleration and lubrication of chain and bar.
• Do not run the engine at high speed unnecessarily.
• Be sure that saw chain stops moving when throttle trigger is
released.
STOPPING
1. Release throttle trigger and turn switch (A) to STOP (O) posi-
tion.
2. Move chain brake lever fully forward to lock chain brake.
NOTE
If engine does not stop, pull choke out fully to stop engine.
Return the unit to your authorized ECHO dealer to check and
repair stop switch before starting the engine again.

14
WARNING DANGER
Read the ECHO “CHAIN SAW SAFETY MANUAL” included
with your chain saw for additional cutting and safety instruc-
tions. Failure to obey all instructions may result in serious or
fatal injuries.
In all circumstances the operation of the chain saw is a one-
man job. It is difficult at times to take care for your own safety,
so don’t assume the responsibility for a helper as well. After
you have learned the basic techniques of using the saw, your
best aid will be your own good common sense...
The accepted way to hold the saw is to stand to the left of the
saw with your left hand on the front handlebar and your right
hand on the rear handle so you can operate the throttle trigger
with your right index finger.
Before attempting to fell a tree, cut some small logs or limbs.
Become thoroughly familiar with the controls and the re-
sponses of the saw.
Start the engine, see that it is running properly. Squeeze the
trigger to open the throttle wide open and start the cut. If the
chain is properly sharpened, the cutting should be relatively
effortless. It is not necessary to press down hard to make the
saw cut. Pushing the saw too hard will slow the engine and
cutting will actually be more difficult.
NOTE
Some material may adversely affect the housings of your
ECHO chain saw.
(Example: Palm Tree Acid, fertilizer, etc.) To avoid housing
deterioration, carefully remove all packed saw dust around
clutch and guide bar area and wash with water. Coat metal
parts with light oil.
WARNING DANGER
Do not let the tip of the bar touch anything while the engine is
running. At cutting speed the chain is moving at a high rate of
speed. Should the tip contact a limb or log while the chain is
moving, the tip will be pushed upward with considerable force.
This is known as kickback. Avoid it!
Kickback
CUTTING INSTRUCTIONS
GENERAL

15
WARNING DANGER
A falling tree can seriously damage anything it may hit
- a car, a house, a fence, a power line, or another tree.
There are ways to make a tree fall where you want it, so
first decide where that is!
Before cutting, clear the area around the tree. You will need
good footing while working and you should be able to work
the saw without hitting any obstacles. Next, select a path of
retreat. When the tree begins to fall you should retreat away
from the direction of fall at a 45 degree angle to avoid the
trunk kicking back over the stump.
Begin the cut on the side to which the tree is to fall. Cut a
notch about 1/3 of the way into the tree as shown. The
position of this notch is important since the tree will try to
fall “into” the notch. The felling cut is made on the side op-
posite the notch and at a level about 2” above the bottom of
the notch. Do not try to cut through to the notch with the
felling cut. The remaining wood between the notch cut and
felling cut (about 2”) will act as a hinge when the tree falls,
guiding it in the desired direction. When the tree starts to
fall, kill the engine, place the saw on the ground and make
your retreat quickly.
To fell big trees with a diameter exceeding twice the bar
length, start the notching cuts from one side and draw the
saw through to the other side of the notch. Start the back
cut on one side of the tree, pivoting the saw through to form
the desired hinge on that side.
Then remove the saw for the second cut. Insert the saw in
the first cut, very carefully so as not to cause kickback. The
final cut is made by drawing the saw forward in the cut to
reach the hinge.
Limbing a fallen tree is much the same as bucking. Never
stand on the tree that you are limbing. When limbing, cau-
tion is the word. Be careful of the tip touching other limbs.
Always use both hands.
2”
45°
2”
FELLING A TREE
DIRECTION
OF FALL
Direction of fall Hinge
Felling cut
First cut
Notch
Second cut
One-third tree
diameter
LIMBING

16
BUCKING
Uphill position
FINISH CUT
FIRST CUT
Board or flat stones
KICKBACK
• Improper thrust cutting.
• When the bar nose hits another tree, etc.
Don’t cut with the saw overhead or the bar in a vertical posi-
tion. If the saw should kick back you may not have good
enough control to prevent possible injury.
Bucking is the sawing of a log or fallen tree into smaller
pieces. There are a few basic rules which apply to all
bucking operations.
Keep both hands on the handles at all times.
Support logs if possible.
When cutting on a slope or hillside, always stand uphill.
Keep in mind that the wood is heavy and that it will bend and
pinch the saw if improperly supported.
The trunk will weaken at the point where you make the cut
unless the tree is lying on perfectly flat ground or supported
as shown.
If you make the cut with the tree on the ground, don’t let the
saw’s chain dig into the earth; it is harmful for the saw, and
you stand a good chance of being struck by flying debris. To
cut the trunk, use the bucking and two-cut sequence shown.
The first cut should be no deeper than one-third the trunk
diameter.
WARNING DANGER
KICKBACK IS DANGEROUS
Kickback is generated when the rotation of the chain is
arrested for some reason. The most dangerous effect of
this action occurs when the nose of the bar contacts
another object, the chain is momentarily stopped and all
the energy of the engine throws the bar upwards and back-
wards towards the operator.
The chain saw industry and government agencies have
attempted to prescribe various safety devices, but the
best protection is to avoid kickback.
Comply with the Safety Precautions as listed in this
manual.

17
/TNENOPMOC
METSYS
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LEVEL
ROYLIAD
EROFEB
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YREVE
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3
SHTNOM
09RO
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6
SHTNOM
072RO
SRUOH
YLRAEY
006
SRUOH
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troPtsuahxErednilyCnobraceD/naelC/tcepsnI 3C/I
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seloHliO&raBediuGnaelC/tcepsnI 1C/I
tekcorpSecalpeR/tcepsnI 2*R/I
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SEDOCRETTELERUDECORPECNANETNIAM NAELC=C,ECALPER=R,TCEPSNI=I:
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MAINTENANCE AND CARE
Your ECHO unit is designed to provide many hours of trouble free service. Regular scheduled maintenance will help your
unit achieve that goal. If you are unsure or are not equipped with the necessary tools, you may want to take your unit to
an ECHO Service Dealer for maintenance. To help you decide whether you want to DO-IT-YOURSELF or have the
ECHO Dealer do it, each maintenance task has been graded. If the task is not listed see your Echo dealer for repairs.
SKILL LEVELS
Level 1= Easy to do. Most required tools come with unit.
Level 2= Moderate difficulty. Some specialized tools may be required.
Level 3= Experience required. Specialized tools are required. ECHO recommends
that the unit be returned to your ECHO dealer for servicing.
ECHO offers REPOWERTM Maintenance Kits and Parts to make your maintenance job easier. Just below each task
heading are listed the various part numbers required for that task. See your ECHO dealer for these parts.
MAINTENANCE INTERVALS

18
A
B
C
D
E
F
AIR FILTER
1. Close choke (A) (Cold Start Position [ ]). This prevents
dirt from entering the carburetor throat when the air filter is
removed. Brush accumulated dirt from air cleaner area.
2. Remove air filter cover (B). Brush dirt from inside cover.
3. Remove air filter (C) and lightly brush debris from filter.
Replace filter if it is damaged, fuel soaked, very dirty, or
the rubber sealing edges are deformed.
4. If filter can be reused, be certain it:
• Fits tightly in the air filter cavity.
• Is installed with the original side out.
5. Install air filter cover.
AUTOMATIC OILER
• The discharge volume of the automatic oiler is adjusted to
3 to 4 cc/min. (@ 7000 rpm) prior to shipment from the
factory.
• Always check oil discharge when in use.
• Turn adjusting screw (D) counter-clockwise to increase oil
volume, clockwise to decrease oil volume.
OIL STRAINER
• Check periodically.
- Do not allow dust to enter into oil tank.
- Clogged oil strainer will affect the normal lubricating
system.
- Pick it up through oil port.
- If the strainer (E) is dirty, wash it in gasoline.
- When the inside of the tank gets dirty, rinsing the tank
out with gasoline will clean it.
FUEL STRAINER
• Check periodically.
- Do not allow dust to enter fuel tank.
- Clogged strainer will cause difficulty in starting engine
or abnormalities in engine performance.
- Pick up the fuel strainer (F) through fuel inlet port with
a piece of steel wire, or the like.
- When the strainer is dirty, wash it in suitable cleaning
fluid.
- When the inside of the fuel tank is dirty, rinsing the
tank out with suitable cleaning fluid will clean it.

19
SPARK PLUG
• Check periodically
• Gap = 0.65mm (.026 in.)
• Replace if either electrode is worn, or if the insulator is
fouled by oil or other deposits.
• Torque = 150 – 170 kg*cm (130 – 150 in. lb.)
IMPORTANT
Do not over-torque
SPROCKET
• A damaged sprocket (J) will cause premature damage or
wear of saw chain.
- When the sprocket has worn out 0.5mm (.020”) or
more, replace it.
• Check sprocket when you install new chain. Replace it if
worn.
• Clean sprocket, clutch and bar mount area before instal-
lation of bar.
IMPORTANT
Some tree sap and resins are corrosive. Thoroughly wash
the guide bar and sprocket areas after each use, then coat
metal parts with light oil.
Worn : 0.5 mm
J
G
H
J
GUIDE BAR AND OIL HOLES
• Clean after each use
- Clean the grooves (G) of the guide bar with a small
screwdriver.
- Clean oil holes (H) with a wire.
• Reverse guide bar periodically.

20
MUFFLER SPARK ARRESTOR
IMPORTANT
Carbon deposits in muffler will cause a drop in engine
output and overheating. Spark arrestor screen must be
checked periodically.
1. Remove muffler cover.
2. Remove spark arrestor screen cover, gaskets, and
screen from muffler body.
3. Clean carbon deposits from muffler components.
NOTE
When cleaning carbon deposit, be careful not to damage
the catalytic element inside muffler.
4. Replace screen if it is cracked, plugged, or has holes
burned through.
5. Assemble components in reverse order.
COOLING SYSTEM CLEANING
• Remove spark plug lead.
• Remove two (2) muffler cover screws and muffler cover.
• Remove four (4) recoil starter housing screws and starter
housing.
• Use a stiff bristle cleaning brush (do not us a metal brush)
to remove dirt from cylinder fins in muffler and ignition coil
areas.
Cylinder Exhaust Port
IMPORTANT
The cylinder exhaust port must be inspected and cleaned
of excess carbon every 3 months or 90 hours of operation
in order to maintain this engine within the emissions
durability period. ECHO strongly recommends that you
return your unit to your ECHO dealer for this important
maintenance service.