Chain Saw
Instruction Manual
MODELS : CS-352
WARNING
Users of this equipment risk injury to themselves and others if the unit is used improperly and/or safety
precautions are not followed. ECHO provides an operator’s manual and a safety manual. Both must be
read and understood for proper and safe operation. Failure to do so could result in serious injury.
X750020201
02/12
X7503272501
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B. Other Safety Precautions
1.Do not operate a chain saw with one hand!
11.Shut off the engine before setting the chain
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 two-
handed use.
saw down.
12.Use extreme caution when cutting small size
brush and saplings because slender material
may catch the saw chain and be whipped
toward you or pull you off balance.
2.Do not operate a chain saw when you are
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.
fatigued.
3.Use safety footwear, snug-fitting clothing
and protective gloves. Wear eye, hearing,
and head protection devices.
14.Keep the handles dry, clean, and free of oil
or fuel mixture.
4.Use caution when handling fuel. Move the
chain saw at least 3 m (10 feet) from the
fueling point before starting the engine.
15.Operate the chain saw only in well ventilated
areas.
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.
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 items
listed in the Instruction manual maintenance
instructions, should be performed by
competent service personnel.
6.Do not start cutting until you have a clear
work area, secure footing, and a planned
retreat path from the falling tree.
(For example, if improper tools are used to
remove the flywheel or if an improper tool is
used to hold the flywheel in order to remove
the clutch, structural damage to the flywheel
could occur and could subsequently cause
the flywheel to burst.)
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.
When carrying a chain saw with the engine
running, push the front hand guard forward
to engage the chain brake.
18.When transporting your chain saw, use the
appropriate guide bar scabbard.
19.Spark arrestor mufflers approved to SAE
Standard J335 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
arrestor screen.
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.
CS-352
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CONTENTS
RULES FOR SAFE OPERATION ............................................................................ 2
SYMBOLS AND SIGNS ........................................................................................... 4
PACKING LIST......................................................................................................... 7
NOMENCLATURE OF PARTS ................................................................................ 8
OPERATOR SAFETY .............................................................................................. 10
CORRECT USE OF CHAIN BRAKE........................................................................ 11
PREPARATION FOR USE....................................................................................... 12
FUEL AND LUBRICANT .......................................................................................... 14
EMISSION DATA ..................................................................................................... 16
OPERATION ............................................................................................................ 16
CUTTING INSTRUCTION........................................................................................ 19
CHAIN AND GUIDE BAR COMBINATION............................................................... 24
MAINTENANCE AND CARE.................................................................................... 25
- Carburetor Adjustment ........................................................................................... 26
- High Altitude Operation ........................................................................................ 26
SETTING THE SAW CHAIN .................................................................................... 30
TROUBLESHOOTING ............................................................................................. 32
STORAGE AFTER USE........................................................................................... 33
TECHNICAL DATA................................................................................................... 33
WARRANTY STATEMENTS.................................................................................... 34
This chain saw is designed for cutting wood or wood products. Do not cut solid metal,
sheet metal, plastic or any non-wood materials.
Specifications, descriptions and illustrative material in this literature are as accurate as
known at the time of publication, but are subject to change without notice.
Illustrations may include optional equipment and accessories, and may not include all
standard equipment.
SYMBOLS AND SIGNS
CIRCLE AND SLASH SYMBOL
This symbol means the specific action
shown is prohibited. Ignoring these
prohibitions can result in serious or
fatal injury.
DANGER
The safety alert symbol accompanied by
the word “DANGER” calls attention to an
act or condition which WILL lead to serious
personal injury or death if not avoided.
NOTICE
WARNING
This enclosed message provides tips for use,
care and maintenance of the unit.
The safety alert symbol accompanied by
the word “WARNING” calls attention to an
act or condition which CAN lead to serious
personal injury or death if not avoided.
IMPORTANT
The enclosed message provides information
necessary for the protection of the unit.
CAUTION
The safety alert symbol accompanied by
the word “CAUTION” calls attention to an
act or condition which may lead to minor or
moderate personal injury if not avoided.
CS-352
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SYMBOL FORM
DECALS
REPLACEMENT BAR AND CHAIN
GUIDE BAR*
PART NO.
CHAIN*
TO AVOID KICKBACK
1. Hold the chain saw firmly with both
hands.
CS-352
PART NO.
12” 12A0CD3745
14” 14A0CD3752
16” 16A0CD3757
91VG45CQ / 91P45CQ
91VG52CQ / 91P52CQ
91VG57CQ / 91P57CQ
WARNING!! Read and follow all
safety precaution in the instruction
manual. Failure to follow
2. Don’t let the nose of the guide bar
contact any obstruction.
3. Tip contact may suddenly move the
guide bar upward and backward,
which may cause serious injury.
instructions could result in serious
personal injury.
Note: There may be other replace-
ment components for achieving
kickback protection. For details,
please refer to the chain and bar
combination sheet shown in the
instruction manual.
Locate these safety decals on your unit. Make sure the decal is legible and
that you understand and follow the instructions on it. If a decal cannot be
read, a new one can be ordered from your ECHO dealer.
CS-352
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WARNING
•
•
•
•
•
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
Moving parts can amputate fingers or cause severe injuries. Keep hands, clothing and loose objects away from
all openings.
• ALWAYS stop engine, disconnect spark plug, and make sure all moving parts have come to a complete stop
before removing obstructions, clearing debris, or servicing unit.
• DO NOT start or operate unit unless all guards and protective covers are properly assembled to unit.
• NEVER reach into any opening while the engine is running. Moving parts may not be visible through openings.
WARNING
Using improper replacement components or removing safety devices may result in serious or fatal injury.
WARNING
Check fuel system for leaks due to fuel tank damage, especially if the unit is dropped. If damage or leaks are
found, do not use unit, otherwise serious personal injury or property damage may occur. Have unit repaired by an
authorized servicing dealer before using.
CS-352
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Emission Data
Emission Control (Exhaust & EvaporativE)
EPA 2010 and Later and/or C.A.R.B. TIER III
e emission control system for the engine is EM (engine
modification) and, if the second to last character of the Engine
Family on the Emission Control Information label (sample
below) is “C”, “K”, or “T”, the emission control system is EM
and TWC (3-way catalyst). e fuel tank/fuel line emission
control system is EVAP (evaporative emissions). Evaporative
emissions for California models may only be applicable to fuel
tanks.
An Emission Control Label is located on the engine. (is
is an EXAMPLE ONLY, information on label varies by
engine FAMILY).
PRODUCT EMISSION DURABILITY (EMISSION COMPLIANCE PERIOD)
e 300 hour emission compliance period is the time span selected by the manufacturer certifying the engine emis-
sions output meets applicable emissions regulations, provided that approved maintenance procedures are followed as
listed in the Maintenance Section of this manual.
PACKING LIST
The ECHO product you purchased has been factory
After opening the carton, check for damage. Immediately
pre-assembled for your convenience. Due to packag-
notify your retailer or ECHO dealer of damaged or miss-
ing parts. Use the packing list to check for missing parts.
other assembly may be necessary.
ing restrictions, guide bar and saw chain installation and
ECHO chain saw
Assembly Tool (s)
ECHO Power Blend X™ 2-stroke oil sample
Instruction manual
Safety manual
Guide bar
Saw chain
Chain Saw
Instruction Manual
MODELS
:
CS-352
Kick Guard®
WARNING
DANGER
This chain saw is intended for professional or experienced chain saw operators. Read and understand
the instructions contained in this manual and the Safety Manual and follow the rules for safe operation.
Failure to do so could result in serious injury.
X750015400
08/11
X7503270900
Warranty registration card
CS-352
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NOMENCLATURE OF PARTS
3
Chain Saw
Instruction Manual
4
MODELS : CS-352
1
5
WARNING
DANGER
This chain saw is intended for professional or experienced chain saw operators. Read and understand
the instructions contained in this manual and the Safety Manual and follow the rules for safe operation.
Failure to do so could result in serious injury.
X750015400
08/11
X7503270900
6
22
7
12
8
2
9
10
11
21
4
13
14
20
19
15
22
16
17
18
CS-352
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NOMENCLATURE OF PARTS
1.
Instruction manual - Included with unit. Read
11.
Saw chain - Chain, serving as a cutting tool.
before operation and keep for future reference to
learn proper, safe operating techniques.
12. Bar tip guard - Anti-kickback device attached on
the bar nose.
2.
3.
Safety manual - Describe operating and safety
instructions for this chain saw.
13. Oil tank cap - For closing the oil tank.
14. Front handle (for the left hand) - Support handle
Front hand guard - Guard between the front
handle and the saw chain for protecting the hand
from injuries and aiding in control of the chain saw
if the hand slips off the handle. This guard is used
to lock the chain brake which is to stop the saw
chain rotation.
located at the front of the engine housing.
15. Starter handle - Pull handle slowly until starter
engages then quickly and firmly. When engine
starts, return handle slowly. DO NOT let handle
snap back or damage to unit will occur.
16. Fuel tank cap - For closing the fuel tank.
4.
Choke control knob - Device for enriching the
fuel/air mixture in the carburetor to aid cold start-
ing.
17. Ignition switch - Device for connecting and dis-
connecting the ignition system and thus allowing
the engine to be started or stopped.
5.
6.
Purge pump - When starting engine, push purge
pump 3 or 4 times.
18. Throttle trigger - Device activated by the opera-
tor’s finger, for controlling the engine speed.
Rear hand guard - Extension on the lower part of
the rear handle for protecting the hand from the
chain if it breaks or degrooves.
19. Rear handle (for the right hand) - Support han-
dle located towards the rear of the engine hous-
ing.
7.
Clutch cover - Protective cover to the guide bar,
saw chain, clutch and sprocket when the chain
saw is in use.
20. Throttle trigger lockout - A safety lever which
must be depressed before the throttle trigger can
be activated in order to prevent the accidental
operation of the throttle trigger.
8.
9.
Chain tension adjuster - Device to adjust chain
tension.
21. Cylinder cover - The cooling airflow grill. It covers
Chain catcher - A projection designed to reduce
the risk of the operator’s right hand from being hit
by a chain which has broken or derailed from the
guide bar during cutting.
the cylinder, air filtter, spark plug and silencer.
22. Cylinder cover latch - Secures cylinder cover.
10. Guide bar - The part that supports and guides the
saw chain.
CS-352
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OPERATOR SAFETY
VIBRATION AND COLD
EYE AND HEARING PROTECTION
• Wear eye protection goggles that meet ANSI
Z 87.1 requirements.
Goggles meeting the requirements have the mark “Z
87” stamped on them.
• Wear hearing protection.
• It is believed that a condition called Raynaud’s Phe-
nomenon, which affects the fingers of certain individu-
als, may be brought about by exposure to vibration
and cold.
Exposure to vibration and cold may cause tin-
gling and burning followed by loss of color and
n u m b n e s s i n t h e fi n g e r s .
The following precautions are strongly recommended
because the minimum exposure which might trigger
the ailment is unknown.
If this guideline is not followed, hearing loss can occur.
ECHO recommends wearing hearing protection at all
times.
WEAR PROPER CLOTHING
• Snug fitting durable clothing should be worn. Pants
should have long legs, DO NOT WEAR SHORTS.
Do not wear loose fitting clothing, scarves, neckties,
jewelry or any item that may become tangled in sur-
rounding growth or the chain saw itself.
• Wear shoes with non-skid soles.
DO NOT wear open toed shoes or operate unit bare-
footed.
• Wear no-slip, heavy duty work gloves to improve your
grip on the chain saw handles.
• Keep your body warm, especially the head and neck,
feet and ankles and hands and wrists.
• Maintain good blood circulation by performing vigor-
ous arm exercises during frequent work breaks and
also by not smoking.
• Limit the number of hours of operation.
Try to fill each day with jobs where operating the
chain saw, or other hand-held power equipment is not
required.
• If you experience discomfort redness and swelling of
the fingers, followed by whitening and loss of feeling,
consult your physician before further exposing yourself
to cold and vibration.
The gloves also help reduce the transmission of ma-
chine vibration to your hands.
HOT HUMID WEATHER
REPETITIVE STRESS INJURY
• It is believed that over-using the muscles and tendons
of the finger, hands, arms and shoulders may cause
soreness, swelling, numbness, weakness and extreme
pain to the areas just mentioned.
• Heavy protective clothing can increase operator
fatigue which may lead to heat stroke.
Schedule heavy work for early morning, or late after-
noon hours when temperatures are cooler.
Certain repetitive hand activities may put you at a high
risk for developing a repetitive stress injury (RSI).
• An extreme RSI condition is Carpal Tunnel Syndrome
(CTS) which could occur when your wrist swells and
squeezes a vital nerve that runs through the area.
Some believe that prolonged exposure to vibration
may contribute to CTS.
AVOID HOT SURFACES
• 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.
CTS can cause severe pain for months or even years.
To reduce the risk of RSI/CTS, do the following:
• Avoid using your wrist in a bent, extended or twisted
position.
• Take periodic breaks to minimize repetition and rest
your hands.
• 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 seri-
ous property damage or personal injury may result.
• Reduce the speed and force in which you do the re-
petitive movement.
• Do exercises to strengthen hand and arm muscles.
• See a doctor if you feel tingling, numbness or pain in
your fingers, hands, wrists or arms. The sooner RSI/
CTS is diagnosed, the more likely permanent nerve
and muscle damage can be prevented.
CS-352
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SPARK ARRESTOR MUFFLER
• The spark arrestor muffler controls the exhaust
noise and prevents hot, glowing particles of
carbon from leaving the muffler. Make sure the
spark arrestor screen is in good repair and prop-
erly seated in the muffler.
• Certain internal combustion engines operated on
forest, brush, and/or grass-covered areas in the
states of Washington, Oregon, Idaho, California,
Minnesota, New Jersey and Maine, are required
to be equipped with a spark arrestor.
This requirement also applies to all U.S. Forest
Service lands.
In some of these areas, the spark arrestor system
must be certified per USDA Forest Service Regula-
tion SAE J335.
Check with your local or state authorities for spe-
cific regulations in your area.
Failure to follow these requirements is a violation
of the law.
CORRECT USE OF CHAIN BRAKE
DANGER
Kickback safety precaution for chain saw
users: 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.
Rotational kickback
Chain moving downward at contact
The installation of a chain brake may be mandatory
by law or as stipulated by insurance regulations in
your area of operation.
You should inquire through local government of-
fices, your employer or your local dealer to ensure
that your chain saw conforms to the required safety
standard.
Rotational kickback
ECHO chain brakes have been designed and
tested to comply with international safety standards
as follows.
This model needs to use low-kickback chain and
bar.
Do not use a combination other than those speci-
fied on page 24.
For your own safety, do not remove the chain brake
system.
Pinch
USA
: ANSI Standard B175.1 - 2000
Safety Requirement for chain saws
Canada : CSA Standard Z 62.1 CHAIN SAWS
WARNING
ANSI Standard B175.1 - 2000 stipulates that
the brake shall stop the chain 0.12 seconds at
an engine speed of 13500 r/min.
It is the responsibility of the owner/operator
to ensure that the brake is serviced, adjusted
and tested strictly in accordance with the
instructions as detailed herein in order
to ensure that the brake performance is
maintained in compliance with the Standard
B175.1 - 2000.
Kickback Danger
Zone
CS-352
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PREPARATION FOR USE
WARNING
Saw chain is sharp! Always wear gloves when
handling assembly, otherwise serious personal
injury may result.
WARNING
Using improper replacement components or remov-
ing safety devices may result in serious or fatal
injury.
KICK GUARD® TO BAR INSTRUC-
TIONS
Bolt (A)
Dimple (D)
1. Install bolt (A) in rear hole (B) of Kick Guard® and
through front hole (C) in guide bar.
2. IMPORTANT: Dimple (D) in Kick Guard® must en-
Kick Guard®
gage recess (E) in guide bar.
Rear hole (B)
3. Tighten nut (F) and bolt (A) using 11 mm (7/16 in.)
wrenches until snug. Make certain Kick Guard® is
flush against guide bar.
Recess (E)
Front hole (C)
4. Tighten nut (F) 1/8 additional turn.
5. Check to make certain Kick Guard® is tight on guide
bar.
Nut (F)
Guide bar
GUIDE BAR AND SAW CHAIN IN-
STALLATION/REMOVAL
1. Remove spark plug lead. (See page 25)
Unlock chain brake
2. Remove two clutch cover nuts and remove clutch
Brake lever
(Front hand guard)
cover.
3. Remove bar and saw chain if necessary. See “Main-
tenance and Care” section for guide bar/saw chain
maintenance procedures.
Two nuts
Clutch cover
CS-352
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4. Unlock the chain brake, and mount guide bar on studs
and slide toward clutch to make saw chain installation
easier. Install chain with cutters on top of guide bar
facing forward.
Clutch
Guide bar studs
Adjuster pin
Guide bar
adjuster
hole
5. Install the clutch cover over the guide bar studs. En-
sure chain tension adjuster pin fits into the guide bar
adjuster hole. Tighten clutch cover nuts finger tight.
Nuts
Clutch cover
ADJUSTING CHAIN TENSION
Unlock chain brake
IMPORTANT
Always loosen clutch cover nuts before turning the
chain tension adjuster, otherwise the clutch cover and
tensioner will be damaged.
1. Remove spark plug lead. (See page 25)
2. Unlock chain brake and loosen two clutch cover nuts,
if necessary.
Direction to tension the chain
Adjusting screw
3. Hold the bar nose up, and turn the adjuster screw
clockwise until chain fits snugly against underside of
the bar.
4. Tighten both nuts with the bar nose held up.
Proper tension Improper tension
5. Pull the chain around the bar by hand. Loosen the
adjustment if you feel tight spots.
6. When chain is properly tensioned, tighten clutch cover
nuts securely - 20 to 23 N·m (175 to 200 in. lb.).
7. Keep chain properly tensioned at all times.
CS-352
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FUEL AND LUBRICANT
FUEL STATEMENT
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 teriary-butyl ether). Gasohol con-
taining methyl (wood) alcohol is NOT approved.
WARNING
Alternative fuels, such as E-15 (15 %
ethanol), E-85 (85 % ethanol) or any fuels
not meeting ECHO requirements are NOT
approved for use in ECHO 2-stroke gasoline
engines.
TWO-STROKE OIL - A two-stroke engine oil meeting
ISO-L-EGD (ISO/CD 13738) and JASO M345-FD Stand-
ards must be used. ECHO brand premium Power Blend
X™ Universal 2-Stroke Oil meets these standards. En-
gine problems due to inadequate lubrication caused by
failure to use an ISO-L-EGD (ISO/CD 13738) and JASO
M345-FD certified oil, such as ECHO premium Power
Blend X™, will void the two-stroke engine warranty.
Use of alternative fuels may cause
performance problems, 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,
carburetor and other engine components.
Fuel Mix Chart 50 : 1
US.
METRIC
Gasoline
Gasoline
Oil
Oil
Gallons
US. fl. oz.
L
mL
1
2
5
2.6
5.2
13
4
8
20
80
160
400
IMPORTANT
• ECHO premium Power Blend X™ 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.
• 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.
CS-352
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HANDLING FUEL
MIXING INSTRUCTIONS -
1. Fill an approved fuel container with half of the required
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!
• NEVER refuel a unit with the engine running.
• DO NOT fill fuel tanks indoors.
ALWAYS fill fuel tanks outdoors over bare
ground.
• Securely tighten fuel cap after refueling.
• Inspect for fuel leakage.
If fuel leakage is found, do not start or operate
unit until leakage is repaired.
• Move at least 3 m (10 feet) from refueling location
before starting the engine.
amount of gasoline.
2. Add the proper amount of two-stroke oil to gasoline.
3. Close container and shake to mix oil with gasoline.
4. Add remaining gasoline, close fuel container, and re-
mix.
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.
• 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.
• Stored two-stroke fuel may separate. ALWAYS shake
fuel container thoroughly before each use.
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 precau-
tion, store fuel in an approved, airtight container. Store in
a well-ventilated, unoccupied building, away from sparks
and flames.
CHAIN LUBRICANT
Cap indication
Oil/fuel tanks are indicated by the following
illustrations.
Proper lubrication of the chain while in operation reduces
friction between the chain and the guide bar to a mini-
mum 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
Oil tank cap
Fuel tank cap
SAE No. 10....... in winter or when cutting resinous
trees.
• When refueling, also refill chain oil.
CS-352
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opEration
WARNING
Moving parts can amputate fingers or cause severe injuries. Keep hands, clothing and loose objects away from
all openings. Always stop engine, disconnect spark plug, and make sure all moving parts have come to a com-
plete stop before removing obstructions, clearing debris, or servicing unit.
WARNING
Engine exhaust IS HOT, and contains Carbon Monoxide (CO), a poison gas. Breathing CO can cause uncon-
sciousness, serious injury, or death. Exhaust can cause serious burns. ALWAYS position unit so that exhaust is
directed away from your face and body.
WARNING
Operation of this equipment may create sparks that can start fires. This unit is equipped with a spark arrestor to
prevent discharge of hot particles from the engine. Metal blade use also can create sparks if the blade strikes
rocks, metal, or other hard objects. Contact local fire authorities for laws or regulations regarding fire prevention
requirements.
WARNING
The ignition components of this machine generate an electromagnetic field during operation which may interfere
with some pacemakers. To reduce the risk of serious or fatal injury, persons with pacemakers should consult
with their physician and the pacemaker manufacturer before operating this machine. In the absence of such
information, ECHO does not recommend the use of ECHO products by anyone who has a pacemaker.
CS-352
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WARNING
Chain brake
• After choke control knob is pulled and then knob
is returned to original position, throttle remains
slightly open (latch condition).
•The chain will attempt to rotate when
engine is started with throttle latch engaged.
•Do not start engine before chain brake is
activated.
Ignition switch
Start / Run
CAUTION
• After starting the engine, squeeze throttle trigger
slightly to release throttle latch, otherwise brake
damage may occur.
• Never use throttle latch for cutting.
• Use the throttle latch only in starting.
Choke control knob
Choke
WHEN THE ENGINE IS COLD
Purge pump
CAUTION
Make sure the bar and chain are free from any
obstruction when starting the chain saw.
• Move chain brake lever fully forward to lock chain
brake before starting.
• Fill the fuel tank with fuel mixture.
It is not permitted to fill fuel above the shoulder level
of fuel tank.
Starter handle
• Fill the chain oil tank with lubricant.
Do not over fill.
Chain brake
• Move ignition switch to “RUN” position.
• Push purge pump 3 to 4 times or until fuel is visible in
purge pump.
• Pull choke control knob all the way out. (Choke posi-
tion)
NOTE
Ignition switch
Do not pull starter rope out to the maximum possible
position.
Start / Run
Do not allow recoil handle to snap back against the
casing.
• Securely hold the chain saw as shown and pull starter
handle several times until first firing sound.
• Push choke control knob all the way in.
• Pull starter handle to start the engine.
Choke control knob
Choke
• When engine starts, immediately squeeze throttle trig-
ger, to release throttle latch.
Purge pump
CAUTION
Do not increase engine speed while chain brake is
locked.
NOTE
If engine does not start after 5 pulls, repeat instruc-
tions.
Starter handle
CS-352
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WHEN THE ENGINE IS WARM
CAUTION
Make sure the bar and chain are free from any
obstruction when starting the chain saw.
Chain brake
• Move chain brake lever fully forward to lock chain
brake before starting.
• Confirm there is fuel and chain oil in the tanks.
• Move ignition switch to “RUN” position.
• Securely hold the chain saw as shown and pull
starter handle.
Choke control knob
Open choke
• Choke may be used if necessary, but after first firing
sound, pull throttle trigger to release choke.
NOTE
If engine does not start after 5 pulls, repeat instruc-
tions.
Unlock chain brake
RUNNING
• When engine starts, keep idling for a few minutes.
• Set the brake lever in the unlocked position before
starting to cut.
• Pull throttle trigger gradually and increase revolution
of the engine.
• The chain starts running when the engine reaches
4,200 r/min approximately.
• Confirm proper acceleration and lubrication of chain
and bar. (Non-adjustable automatic oil pump)
• Do not run the engine at high speed unnecessarily.
• Be sure that saw chain stops moving when throttle
trigger is released.
Ignition switch
STOP
STOPPING
• Release throttle trigger and move ignition switch down
to “STOP” position.
Throttle trigger
NOTICE
If engine does not stop, pull choke control knob out
fully to stop engine.
Return the unit to your authorized ECHO dealer
to check and repair stop switch before starting the
engine again.
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CHECKING CHAIN TENSION
• Chain tension should be checked frequently during
work and corrected as necessary.
CAUTION
Do not operate with a loose chain.
CHAIN LUBRICATION TEST
Hold the chain just above a dry surface and open the
throttle to half speed for 30 seconds.
A thin line of “thrown” oil should be seen on the dry
surface.
CUTTING INSTRUCTION
GENERAL
CAUTION
• Read the ECHO “CHAIN SAW SAFETY MANUAL”
included with your chain saw for additional
cutting and safety instructions.
• Wear suitable hearing protection such as
earmuffs or earplugs to protect against
objectionable or uncomfortable loud noises.
• 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!
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.
Kickback
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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
responses 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 cut-
ting 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 cut-
ting will actually be more difficult.
Some material may adversely affect the housings of your
chain saw.
(Example palm Tree Acid, fertilizer etc.)
To avoid housing deterioration, carefully remove all
packed sawdust around clutch and guide bar area and
wash with water. Coat metal parts with light oil.
FELLING THE TREE
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 ob-
stacles.
3 m (10 feet)
Retreat
Direction of fall
45°
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 and at
least 3 m (10 feet) from the trunk to avoid the trunk kick-
ing back over the stump.
Retreat
Not this way
Direction of fall
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. The position
of this notch is important since the tree will try to fall
“into” the notch.
Hinge
5 cm (2 in.)
The felling cut is made on the side opposite the notch
and at a level about 5 cm (2 in.) above the bottom of the
notch.
First cut
Felling cut
Do not try to cut through to the notch with the felling cut.
The remaining wood between the notch cut and felling
cut about 5 cm (2 in.) will act as a hinge when the tree
falls, guiding it in the desired direction.
Notch
5 cm (2 in.)
Second cut
When the tree starts to fall, kill the engine, place the
saw on the ground and make your retreat quickly.
One-third tree diameter
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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 kick-
back.
3
2
1
The final cut is made by drawing the saw forward in the
cut to reach the hinge.
LIMBING
Limbing a fallen tree is much the same as bucking.
Never stand on the tree that you are limbing.
When limbing, caution is the word.
Be careful of the tip touching other limbs.
Always use both hands.
Don’t cut with the saw overhead or aligned vertically with
your body. If the saw should kickback, you may not have
enough control to prevent possible injury.
BUCKING
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.
Uphill position
DANGER
• 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
backwards 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.
Finish cut
First cut
Board or flat stones
• Comply with the safety precautions as listed in
this Manual and Safety Manual.
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CHAIN BRAKE OPERATION
• Set the lever in the unlocked position before starting
to cut.
Kickback motion
• If the brake is tripped by kickback reaction, the chain
will stop immediately. Release the throttle to avoid
possible damage to the engine or clutch.
Improper thrust cutting
• Do not attempt to operate the engine with the brake
locked.
Kickback motion
TESTING THE BRAKE
• Start the engine on a solid level surface and run at a
fast idle until warm.
• Hold the saw firmly by the handles and accelerate the
engine to a fast idle.
• Slowly operate the chain brake lever while holding
the saw firmly on the ground.
When the bar nose hits another tree, etc.
When the brake lever trips, the chain should stop.
Immediately release the throttle trigger.
Chain brake function
When the lever is pushed forward, chain brake
instantly stops the chain.
WARNING
If the chain does not stop immediately, return the
saw to your authorized ECHO dealer for repair.
NOTICE
• For practice, while cutting a small tree, push the
lever forward to lock the brake.
• Confirm that the brake works properly before each
use.
• If the chain brake is clogged with wood chips, func-
tion of the brake may deteriorate. Always keep the
device clean.
Chain brake unlock
When the lever is fully pulled toward the
operator, brake is unlocked.
• Do not increase engine revolution while the chain
brake is locked.
• When using throttle latch at starting, keep the chain
brake locked.
IMPORTANT
Do not allow the saw to tip forward in order to avoid
damage to the chain.
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AUTOMATIC CHAIN BRAKE
End of the guide bar may be placed at the
height of about 55 cm (22 in.).
Kickback produced from the tip of the guide bar will trip
the automatic chain brake. To make sure that the auto-
matic chain brake operates properly, follow these steps:
1. Stop the engine.
2. Hold the saw with the guide bar approximately 55 cm
(22 in.) above a wooden surface. Right hand should
hold the rear handle, and left hand should hold the front
handle.
55 cm
(22 in.)
3. Release the front handle and drop the end of the guide
bar against the wooden surface.
4. The impact should lock the chain brake.
IMPORTANT
When checking the operation of the automatic chain
brake, use a soft surface substance like wood to
provide the impact so the chain is not damaged.
Rear handle should be gripped lightly with the
right hand.
WINTER OPERATION
Use the winter plug to prevent carburetor trouble in winter.
Warm weather
Cold weather
“storage” position
• Release the cylinder cover latch and remove cylinder
cover. Remove plug from warm weather position, and
install into cold weather “storage” position.
position
NOTICE
For operation at normal temperature return the plug
to its original place. (5°C, 41°F)
It causes over heating of the engine.
Plug
Warm weather
position
Cylindner
cover
Cold weather
“storage” position
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CHAIN AND GUIDE BAR COMBINATION
The following combinations are recommended for model CS-352.
Guide Bar
Part No.
Saw chain
Length
Pitch
Part No.
Links
mm (in)
mm (in)
Double Guard
305 (12)
356 (14)
406 (16)
12A0CD3745
14A0CD3752
16A0CD3757
9.53 (3/8)
9.53 (3/8)
9.53 (3/8)
91VG45CQ, 91P45CQ
91VG52CQ, 91P52CQ
91VG57CQ, 91P57CQ
45
52
57
WARNING
Use of replacement saw chain and/or guide bar other than that specified, or operation without the “tip guard” in place,
may cause severe kickback resulting in serious injury.
Only use replacement guide bar and saw chain that has been designated as meeting the ANSI B175.1 - 2000
and/or CSA Z62.3 requirements. All of the guide bar and chain combinations listed above meet the ANSI
B175.1-200 and/or CSA Z62.3 requirements.
IMPORTANT
Chain and guide bar gauge size must be identical. Use Bar/Chain combinations shown in table above.
IMPORTANT
If your kick guard is damaged or lost, contact your Echo dealer for a replacement. For the name of the
Refer to your Chain Saw Safety Manual for kick guard application information.
SAW CHAIN
GUIDE BAR
(Low-kickback)
(Low-kickback)
Replacement guide bars.
The following guide bars may be considered to
CAUTION
have equivalent kickback energy.
Do not use replacement saw chain unless
• Sprocket nose guide bars of the same length and
it has been designated as meeting the
nose radius, same pitch and having the same
ANSI B175.1 - 2000 kickback performance
number of teeth.
requirements, when tested on the
• Hard nose guide bars of the same length and
representative sample of chain saws below
nose radius as a sprocket nose bar.
3.8 c.i.d. specified in ANSI B175.1 - 2000.
NOTE
LOW KICKBACK SAW CHAIN meets the
kickback performance requirements of ANSI
B175.1 - 2000 (safety requirements for gasoline-
powered chain saws).
CS-352
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MAINTENANCE AND CARE
WARNING
Moving parts can amputate fingers or cause severe injuries. Keep hands, clothing and loose objects away from
all openings. Always stop engine, disconnect spark plug, and make sure all moving parts have come to a com-
plete stop before removing obstructions, clearing debris, or servicing unit. Allow unit to cool before performing
service. Wear gloves to protect hands from sharp edges and hot surfaces.
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 Ser-
vice 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 =
Level 2 =
Easy to do. Common tools may be required.
Moderate difficulty. Some specialized tools may be required.
ECHO offers REPOWERTM Maintenance Kits and Parts to make your maintenance job easier.
maintEnanCE intErvals
REQ'D
SKILL
LEVEL
DAILY OR
BEFORE
USE
3 MONTHS
OR 90
HOURS
COMPONENT/
SYSTEM
MAINTENANCE
PROCEDURE
EVERY
REFUEL
YEARLY 600
HOURS
Air Filter
Inspect/Clean
1
1
1
1
1
1
I / C *
R *
Automatic Oiler
Oil Filter
Inspect/Adjust
Inspect/Replace
Inspect/Replace
Inspect/Replace
Replace
I
I
I/C *
Fuel System
Fuel Filter
I (1) *
I (1) *
I *
I *
I / R *
R *
Fuel Cap Gasket
Guide Bar & Sprocket
Nose
Inspect/Clean/Lubricate
1
2
I / C *
I
Inspect/Sharpen/Replace/
Tensioning
Saw Chain
I *
I *
Sprocket
Inspect/Replace
Inspect/Clean
Inspect/Clean
2
1
2
2
2
1
1
Spark Plug
Cooling System
I / C / R *
I / C
Muffler Spark Arrestor Inspect/Clean/Replace
Cylinder Exhaust Port Inspect/Clean/Decarbon
I / C / R *
I / C
Recoil Starter Rope
Screws/Nuts/Bolts
Inspect/Clean
I / C *
I *
Inspect/Tighten/Replace
MAINTENANCE PROCEDURE LETTER CODES: I = INSPECT, R = REPLACE, C = CLEAN
IMPORTANT NOTE - Time intervals shown are maximum. Actual use and your experience will determine the
frequency of required maintenance.
MAINTENANCE PROCEDURE NOTES:
(1) Low evaporative fuel tanks DO NOT require regular maintenance to maintain emission integrity.
* Replacement is recommended based on the finding of damage or wear during inspection.
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Every unit is run at the factory and the carburetor is set
in compliance with Emission Regulations. In addition,
the carburetor is equipped with “H” (High Speed) and
“L” (Low Speed) needle adjustment limiters that prevent
settings outside acceptable limits.
Idle adjusting screw
1. Before adjusting carburetor clean or replace air filter
and muffler “Spark Arrestor Screen”.
2. Make sure the bar and chain are properly adjusted.
3. Start engine and run several minutes to bring to oper-
ating temperature. Flash choke twice during warm-up
to clear any air from the fuel system.
4. Stop engine.
Turn “H” speed needle counterclockwise (CCW) to
stop.
High speed needle (H)
Low speed needle (L)
Turn “L” speed needle midway between full clockwise
(CW) stop and CCW stop.
5. Idle Speed Adjustment:
CARBURETOR ADJUSTMENT
Engine Break-In
• Start engine, turn “Idle” speed adjustment screw
CW until the saw chain begins to turn, then turn
screw out CCW until the saw chain stops turning.
Turn screw out, CCW, an additional 1/4 turn.
New engines must be operated a minimum duration
of two tanks of fuel break-in before carburetor adjust-
ments can be made. During the break-in period your
engine performance will increase and exhaust emis-
sions will stabilize. Idle speed can be adjusted as
required.
WARNING
Cutting attachment must not move when unit is
idling.
High Altitude Operation
This engine has been factory adjusted to maintain sat-
isfactory starting, emission, and durability performance
up to 1,100 feet above sea level (ASL) (96.0 kPa). To
maintain proper engine operation and emission compli-
ance above 1,100 feet ASL the carburetor may need to
be adjusted by an authorized ECHO service dealer.
6. Accelerate to full throttle for 2 - 3 seconds to clear any
excess fuel in the engine, then return to idle.
Accelerate engine to full throttle to check for smooth
transition from idle to high speed.
If engine hesitates turn “L” needle CCW 1/8 turn and
repeat acceleration.
IMPORTANT
Continue adjustment until smooth acceleration results.
7. Check idle speed and reset if necessary as described
in item 5. If a tachometer is available idle speed should
be set to 3000 r/min.
If the engine is adjusted for operation above
1,100 feet ASL, the carburetor must be re-
adjusted when operating the engine below 1,100
feet ASL, otherwise severe engine damage may
result.
CAUTION
When starting, idling adjustment speed should
be adjusted not to rotate the saw chain. Correct
idle speed is adjusted 3000 r/min. Or 1/4 turn CCW
from the point the chain stops moving.
When you experience trouble with the carburetor,
contact your dealer.
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AIR FILTER
Cylinder cover
• Check before every use.
• Press hand guard forward and close choke.
Air filter
• Release the cylinder cover latches, and remove the
cylinder cover and air filter.
• Brush off dust lightly, or clean with compressed air, or
replace the air filter.
Cylinder cover latch
• Reinstall air filter and the cylinder cover, engage
Cylinder cover latch
latch.
CHECK FUEL SYSTEM
• Check before every use.
• After refueling, make sure fuel does not leak from
around fuel pipe, fuel grommet or fuel tank cap.
• In case of fuel leakage there is a danger of fire. Stop
using the machine immediately and request your
dealer to inspect or replace.
SPARK PLUG
• Check periodically.
• The standard spark gap is 0.65 mm (0.026 in.).
• Correct the spark gap if it is wider or narrower than
the standard gap.
• Fastening torque: 13 to 17 N·m
(130 to 170 in. lb.).
0.65 mm (0.026 in.)
FUEL FILTER
• Check periodically.
• Do not allow dust to enter fuel tank.
• A clogged filter will cause difficulty in starting engine
or abnormalities in engine performance.
• Pull the fuel filter out through fuel inlet port with a
piece of steel wire or the like.
• When the filter is dirty, replace it.
• When the inside of the fuel tank is dirty, rinsing the
tank out with gasoline can clean it.
Fuel filter
Fuel tank cap
NOTE
Federal EPA regulations require all model year
2012 and later gasoline powered engines produced
for sale in the United States to be equipped with a
special low permeation fuel supply hose between
the carburetor and fuel tank. When servicing model
year 2012 and later equipment, only fuel supply
hoses certified by EPA can be used to replace
the original equipment supply hose. Fines up to
$37,500 may be enforced for using an un-certified
replacement part.
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OIL FILTER
• Check periodically.
• Do not allow dust to enter into oil tank.
• A clogged oil filter will affect the normal lubricating
system.
• Pull it out through oil filling hole with a piece of steel
wire or the like.
Oil tank cap
• If the filter is dirty, wash it in gasoline or replace it.
• When the inside of the tank gets dirty, rinsing the
tank out with gasoline can clean it.
Oil filter
GUIDE BAR
• Clean before using.
- Clean the groove of the guide bar with a small screw-
driver.
Groove
Sprocket
- Clean oil holes with a wire.
• Reverse guide bar periodically.
• Check sprocket and the clutch and clean the bar
mount area before installation of the bar.
Replace either or both if worn.
Oil hole
SPROCKET
Worn : 0.5 mm (0.02
• A damaged sprocket will cause premature damage or
wear of saw chain.
- When the sprocket has worn out 0.5 mm (0.02 in.)
or more, replace it.
• Check sprocket when you install new chain. Replace it
if worn.
CYLINDER FINS
• Check periodically.
• Clogged fins will result in poor engine cooling.
• Remove dirt and dust from between fins to let cooling
air pass easily.
Cylinder fins
MUFFLER SPARK ARRESTOR
Muffler
• Remove cylinder cover and remove spark plug lead.
• Remove spark arrestor screen cover and screen from
muffler body.
Spark arrestor screen
Screen cover
• Clean carbon deposits from muffler components.
• Replace screen if it is cracked, or has holes burned
through.
• Assemble components in reverse order.
NOTICE
Carbon deposits in muffler will cause drop in engine
output. Spark arrestor screen must be checked
periodically.
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EXHAUST PORT CLEANING
Level 2
Parts Required:
As needed: Muffler gasket
1. Remove cylinder cover and remove spark plug lead.
2. Place piston at top dead center. Remove muffler (A) and
muffler gasket (B).
B
3. Use a wood or plastic scraping tool to clean deposits from
cylinder exhaust port.
A
IMPORTANT
Never use a metal tool to scrape carbon from the exhaust
port.
Do not scratch the cylinder or piston when cleaning the
exhaust port. Do not allow carbon particles to enter the
cylinder.
4. Inspect muffler gasket, and replace if damaged.
5. Install muffler gasket and muffler.
6. Tighten muffler mounting bolts (or nuts) to 60-80 in • lbf (70-
90 kgf • cm).
7. Install cylinder cover and attach spark plug lead.
8. Start engine, and warm to operating temperature.
9. Stop engine, and re-tighten mounting bolts (or nuts) to
specifications.
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SETTING THE SAW CHAIN
Preset tie strap
Left hand cutter
Drive link
Top plate
Tie strap
Side plate
Depth guage
Guard link
Right hand cutter
Important points for proper maintenance of saw
chain:
• Keep the cutters sharp at all times.
• Keep the left and the right cutters properly
aligned.
- Note that blunt or irregular cutters will result in
poor cutting performance, increased vibration
of chains and premature breakage of the saw
chain.
• Drive link serves to remove sawdust from the
groove of the guide bar.
Sharpen lower edge
Keep the lower edge of the drive link sharp
where indicated.
SETTING SAW CHAIN
• For setting saw chain, round file (4.0 mm dia.
5/32 in.) and flat file are used.
Keep this angle
• To keep correct position and correct angle,
use the file holder (Sure Sharp®).
30°
Push file as shown
91P
91VG
90°
Hold the file horizontally
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1/5
One fifth of file diameter remains
above cutter edge
• Place the depth gauge tool firmly on guide
bar so that depth gauge protrudes.
Depth gauge tool
Then file top of depth gauge with the flat file until
flat with top of the depth gauge tool.
Remove until
flat with tool
- Be sure to round off the front edge of the depth
gauge.
Round off
the edge
Properly filed cutters are shown in illustration.
91P :85°
91VG :80°
When setting of the chain is finished, soak it in oil
and wash away filings completely before using.
- When chain has been filed on the bar, supply
sufficient oil to it, rotate the chain slowly to wash
away the filings before using again.
- If the chain saw is operated with filings clogged
in the groove, the saw chain and the guide bar
will be damaged prematurely.
- If the saw chain becomes soiled with resin, for
instance, clean it with kerosene and soak in it
oil.
30°
Top plate filing angle
Side plate angle
91P :55°
91VG :55°
0.64 mm
(0.025 in.)
NOTICE
These angles are referred to as Oregon 91P or
91VG.
To sharpen other follow chain manufacturer’s
instruction.
Parallel
Top plate cutting angle
Depth gauge
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TROUBLESHOOTING
ENGINE PROBLEM TROUBLESHOOTING CHART
Problem
Check
Status
Cause
Remedy
Clean or replace
Fuel at carburetor
No fuel at carburetor Fuel strainer clogged
Fuel line clogged
Clean or replace
Carburetor
See your Echo dealer
Fuel at cylinder
No fuel at cylinder
Carburetor
See your Echo dealer
Muffler wet with fuel Fuel Mixture too rich
Open choke
Engine
cranks -
starts hard/
doesn't
Clean/replace air filter
Adjust carburetor
See your Echo dealer
Spark at end
of plug wire
No spark
No spark
Stop switch off
Electrical problem
Interlock switch
Turn switch to ON
See your Echo dealer
See your Echo dealer
start
Spark at plug
Spark gap incorrect
Covered with carbon
Fouled with fuel
Adjust to .65mm (0.026 in.)
Clean or replace
Clean or replace
Plug defective
Replace plug
Air filter
Air filter dirty
Normal wear
Clean or replace
Fuel filter
Fuel filter dirty
Contaminants/residues in Replace
fuel
Fuel vent
Fuel vent plugged
Contaminants/residues in Clean or replace
fuel
Engine runs,
but dies or
does not
accelerate
properly
Spark Plug
Carburetor
Plug dirty/worn
Normal wear
Clean and adjust or replace
Improper adjustment Vibration
Adjust
Clean
Cooling System
Cooling system
dirty/plugged
Extended operation in
dirty/dusty locations
Spark Arrestor
Screen
Spark arrestor
screen plugged
Normal wear
Replace
Engine does
not crank
N/A
N/A
Internal engine problem
See your Echo dealer
WARNING
Fuel vapors are extremely flammable and may cause fire and/or explosion. Never test for ignition spark
by grounding spark plug near cylinder plug hole, otherwise serious personal injury may result.
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STORAGE AFTER USE
• Inspect and adjust every part of the chain saw.
WARNING
Do not store in an enclosure where fuel
fumes may accumlate or reach an open
flame or spark.
- Completely clean every part and repair if neces-
sary.
- Apply thin coating of oil on metal parts to prevent
rust.
• Remove chain and guide bar.
• Drain fuel tank completely. Press purge bulb 6 - 7
times to remove remaining fuel from carburetor then
drain the tank again. Close choke, start and run the
engine until it stops due to lack of fuel.
• Allow engine to cool then remove the spark plug and
pour 7 cc (1/4 oz.) of fresh, clean, two-stroke engine
oil into the cylinder through the spark plug hole.
• Store in a dry area, free from dust.
CAUTION
Do not lend or rent your chain saw without
the Instruction manual and Safety manual.
NOTICE
• For future reference, you should keep this
Instruction manual and the Safety manual.
• If this Instruction manual or the Safety manual
has become illegible or is lost, please purchase
a new one from your ECHO dealer.
TECHNICAL DATA
MODEL
CS-352
Dimension
Mass
L × W × H
mm
kg
396 × 232 × 268 (15.6 in. × 9.1 in. × 10.6 in.)
4.0 (8.8 lb.) Without chain and guide bar
Air-cooled two-stroke single cylinder
Power head, dry
Type
Engine
Displacement
mL (cm³) 34.0 (2.075 cu. in.)
Carburetor
Magneto
Diaphragm type
Flywheel magneto: CDI system
Spark plug
Starter
NGK BPM8Y
Recoil starter
Power transmission
Automatic centrifugal clutch
Fuel
EGD
Mixture ratio
50 : 1 ratio with ECHO Power Blend X™, ISO-L-
(ISO/CD 13738) and JASO M345-FD two-stroke,
air-cooled engine oil.
Gasoline
Use 89 octane unleaded.
Donotusefuelcontainingmethylalcohol,morethan
10 % ethyl alcohol or 15 % MTBE.
Do not use alternative fuels such as E-15 or E-85.
Tank capacity
Bar and chain
Tank capacity
L
L
0.25 (8.47 US. fl. oz.)
Oil
ECHO bar and chain oil (or motor oil)
0.26 (8.81 US. fl. oz.)
Guide bar and
See page 22 for Chain and Guide Bar Combination
saw chain
Lubrication
Non-adjustable automatic oil pump
Engine speed Idle
Clutch engagement
Wide open throttle
r/min
r/min
r/min
3,000
4,200
12,250
Standard
features
Front hand guard, Rear hand guard,
Anti-vibration device, Throttle control lockout,
Chain brake, Chain catcher, Spark arrestor muffler,
Kick guard, (Spiked bumper; Option)
* Technical data subject to change without notice.
CS-352
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Warranty statEmEnts
ECHO LIMITED WARRANTY STATEMENT FOR
PRODUCT SOLD IN USA AND CANADA BEGINNING 01/01/2010
ECHO'S RESPONSIBILITY
ECHO Incorporated’s Limited Warranty, provides to the original purchaser that this ECHO product is free from defects in material and workmanship.
Under normal use and maintenance from date of purchase, ECHO agrees to repair or replace at ECHO’s discretion, any defective product
free of charge at any authorized ECHO servicing dealer within listed below application time periods, limitations and exclusions. THIS LIMITED
WARRANTY IS ONLYAPPLICABLE TO ECHO PRODUCTS SOLD BYAUTHORIZED ECHO DEALERS. IT IS EXTENDED TO THE ORIGINAL
PURCHASER ONLY, AND IS NOT TRANSFERABLE TO SUBSEQUENT OWNERS EXCEPT FOR EMISSION RELATED PARTS. Repair
parts and accessories replaced under this warranty are warranted only for the balance of the original unit or accessory warranty period. Any
damage caused by improper installation or improper maintenance is not covered by this warranty. All parts or products replaced under warranty
become the property of ECHO, Inc. This warranty is separate from the Emission control warranty statement supplied with your new product.
Please consult the Emission Control Warranty Statement for details regarding emission related parts. For a list of Authorized ECHO Dealers
refer to WWW.ECHO-USA.COM or call 1-800-432-ECHO.
OWNER’S RESPONSIBILITY
To ensure trouble free warranty coverage it is important that you register your ECHO equipment on-line at WWW.ECHO-USA.COM or by fill-
ing out the warranty registration card supplied with your unit. Registering your product confirms your warranty coverage and provides a direct
link if we find it necessary to contact you.
The owner shall demonstrate reasonable care and use, and follow preventative maintenance, storage, fuel and oil usage as prescribed in the
operator’s manual. Should a product difficulty occur, you must, at your expense, deliver or ship your ECHO unit to an authorized ECHO servicing
dealer for warranty repairs (within the applicable warranty period), and arrange for pick-up or return of your unit after the repairs have been
made. For your nearest authorized ECHO servicing dealer, call ECHO’s Dealer Referral Center, at 1-800-432-ECHO or you can locate an ECHO
servicing dealer at WWW.ECHO-USA.COM. Should you require assistance or have questions concerning ECHO’s Warranty Statement, you
can contact our Consumer Product Support Department at 1-800-673-1558 or contact us through the web at WWW.ECHO-USA.COM.
PRODUCT WARRANTY PERIOD
RESIDENTIAL APPLICATION
•
5 YEAR WARRANTY - All units for residential, or non-income producing use will be covered by this limited warranty for five (5) years from
date of purchase.
EXCEPTIONS:
•
For two-stroke engine powered products, the electronic ignition module, flexible drive cables, SRM solid drive shafts, and TC tines
are warranted for the life* of the product on parts only.
•
Cutting attachments such as, but not limited to, bars, chains, sprockets, blades, and nylon trimmer heads for residential or non-income
producing use will be covered for failures due to defects in material or workmanship for a period of 60 days from original product
purchase date. Any misuse from contact with concrete, rocks, or other structures is not covered by this warranty.
ECHO’s Rapid Loader String Head carries a lifetime warranty on the line locking system, parts only; no labor. Refer to your operator’s
manual for string head installation and maintenance instructions.
•
•
All SB-Series and PRO ATTACHMENT SERIES Split Shaft attachments carry the same warranty duration as the units they are
designed to fit.
COMMERCIAL APPLICATION
•
1 YEAR WARRANTY - All Chain Saws, QuikVent Saws, and Cut-Off Saws for commercial, institutional, agricultural, industrial, or income
producing use will be covered by this limited warranty for one (1) year from the date of purchase.
•
2 YEAR WARRANTY - All other units for commercial, institutional, agricultural, industrial, or income producing use will be covered by this
limited warranty for two (2) years from the date of purchase.
EXCEPTIONS:
•
For two-stroke engine powered products, the electronic ignition module, flexible drive cables, SRM solid drive shafts and TC tines,
are warranted for the life* of the product on parts only.
•
Cutting attachments such as, but not limited to, bars, chains, sprockets, blades, and nylon trimmer heads for commercial, institutional,
agricultural, industrial, rental, or income producing will be covered for failures due to defects in material or workmanship for a period
of 30 days from original product purchase date. Any misuse from contact with concrete, rocks, or other structures is not covered by
this warranty.
•
•
ECHO’s Rapid Loader String Head carries a lifetime warranty on the line locking system, parts only; no labor. Refer to your operator’s
manual for string head installation and maintenance instructions.
All SB-Series and PRO ATTACHMENT SERIES Split Shaft attachments carry the same warranty duration as the units they are
designed to fit.
RENTAL APPLICATION - 90 DAYS WARRANTY
• Units for rental use will be covered against defects in material and workmanship for a period of 90 days from the date of purchase.
* ECHO’s liability under the “Lifetime” coverage is limited to furnishing parts specified under the PROdUCT wARRANTy PERIOd section of
this warranty statement for “Life” free of charge for a period of ten (10) years after the date of the complete unit’s final production.
CS-352
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PURCHASED REPAIR PARTS, SHORT BLOCKS AND ACCESSORIES
• 90-day residential, or non-income producing warranty
• 30-day commercial, institutional, agricultural, industrial, income producing, or rental application warranty
ATTENTION TWO-STROKE ENGINE POWER PRODUCT OWNERS
This ECHO two-stroke engine power product is a quality-engineered unit which has been manufactured to exact tolerances to provide superior
performance. To help ensure the performance of the unit, it is required to use two-stroke oil which meets the ISO-L-EGD Standard per ISO/CD
13738 and JASO M345FD Standards. ECHO Power Blend™ Two-Stroke Oil is a premium two-stroke oil specifically formulated to meet ISO-
L-EGD (ISO/CD 13738) and JASO M345FD Standards. The use of two-stroke oils designed for other applications, such as for outboard motors
or lawnmowers can result in severe engine damage, and will void your two-stroke engine limited warranty.
THIS WARRANTY DOES NOT COVER DAMAGE CAUSED BY:
•
Lack of lubrication or engine failure, due to the use of two-stroke oils that do not meet the ISO-L-EGD (ISO/CD 13738) and JASO M345FD
Standards. Engine problems due to inadequate lubrication caused by failure to use an ISO-L-EGD compliant and JASO M345FD registered
oil, will void the two-stroke engine limited warranty. ECHO Power Blend™ Two-Stroke Oil meets the ISO-L-EGD and JASO M345FD
Standard. Emission related parts are covered for 5 years residential use or 2 years commercial use regardless of two-stroke oil used, per
the statement listed in the EPA or California Emission Defect Warranty Explanation.
•
damage caused by use of gasohol, containing methanol (wood alcohol), or gasoline containing less than 89 octane. Only use gasoline which
contains 89 octane or higher. Gasohol which contains a maximum 10% ethanol (grain alcohol) or 15% MTBE (methyl/tertiary/butyl/ether)
is also approved. The prescribed mixing ratio of gasoline to oil is listed on the ECHO oil label and covered in your operator’s manual.
Engine damage caused by use of ether or any starting fluids.
damage caused by tampering with engine speed governor or emission components, or running engines above specified and recommended
engine speeds as listed in your operator’s manual.
•
•
•
•
•
Operation of the unit with improperly maintained/removed cutting shield or removed/damaged air filter.
damage caused by dirt, pressure or steam cleaning the unit, salt water, corrosion, rust, varnish, abrasives, and moisture.
defects, malfunctions or failures resulting from abuse, misuse, neglect, modifications, alterations, normal wear, improper servicing, or use
of unauthorized attachments.
•
•
Incorrect storage procedures, stale fuel, including failure to provide or perform required maintenance services as prescribed in the operator's
manual. Preventative maintenance as outlined in the operators manual is the customer’s responsibility.
Failures due to improper set-up, pre-delivery service or repair service by anyone other than authorized ECHO servicing dealer during the
warranty period.
•
•
Certain parts and other items are not warranted, including but not limited to: lubricants, starter cords, and engine tune-ups.
Use of spark plugs other than those meeting performance and durability requirements of the OEM spark plug listed in the Operator's
Manuals.
•
Overheating or carbon scoring failures due to restricted, clogged exhaust port or combustion chamber, including damage to spark arrester
screen.
•
•
Adjustments after the first (30) thirty days and beyond, such as carburetor adjustment and throttle cable adjustment.
damage to gears or gear cases caused by contaminated grease or oil, use of incorrect type or viscosity of lubricants, and/or failure to comply
with recommended grease or oil change intervals.
•
•
•
damage caused by loading SHREd 'N' VAC® beyond recommended capacity.
damage caused by pump or sprayer running dry, pumping or spraying caustic or flammable materials, or lack of or broken strainers.
Additional damage to parts or components due to continued use after operational problem or failure occurs. Should operational problem or
failure occur, the product should not be used, but delivered as is to an authorized ECHO servicing dealer.
It is a dealer’s and/or customer’s responsibility to complete and return the warranty registration card supplied with your ECHO product or by visiting
WWW.ECHO-USA.COM. your receipt of purchase including date, model and serial number must be maintained and presented to an authorized
ECHO servicing dealer for warranty service. Proof of purchase rests solely with the customer. Some states do not allow limitations on how long
an implied warranty lasts, so the above limitations may not apply to you. Some states do not allow the exclusion or limitation of incidental or
consequential damages, so you may also have other specific legal rights which vary from state to state. This limited warranty is given by ECHO
Incorporated, 400 Oakwood Rd., Lake Zurich, IL 60047.
DISCLAIMER OF IMPLIED WARRANTIES
This limited warranty is in lieu of all other expressed or implied warranties, including any warranty of FITNESS FOR A PARTICULAR PURPOSE
OR USE and any implied warranty of MERCHANTABILITY otherwise applicable to this product. ECHO and its affiliated companies shall not be
liable for any special incidental or consequential damage, including lost profits. There are no warranties extended other than as provided herein.
This limited warranty may be modified only by ECHO.
99922201032
11/18/2011
CS-352
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ECHO INCORPORATED EMISSION CONTROL WARRANTY STATEMENT
FOR ECHO AND SHINDAIWA BRANDS
The Environmental ProtectionAgency (EPA) and the CaliforniaAir Resources Board (C.A.R.B.) and ECHO Incorporated (ECHO Inc.) are pleased
to explain the emission control system warranty on your 2010 and later equipment/small off-road engine (SORE). New equipment/SORE must be
designed, built and equipped to meet stringent EPA and C.A.R.B. anti-smog standards. ECHO Inc. must warrant the emission control system on
your equipment/SORE for the periods of time listed below, provided there has been no abuse, neglect or improper maintenance of your equipment/
SORE. Your emission control system may include parts such as: carburetor, fuel-injection system, ignition system, catalytic converter/muffler, fuel
tank, fuel feed lines, fuel cap assembly, spark plug, air filters, and other associated components. Where a warrantable condition exists, ECHO
Inc will repair your equipment/SORE at no cost to you including diagnosis, parts and labor. The Emission Control System warranty is extended
to the original owner including all subsequent owners.
MANUFACTURER'S WARRANTY COVERAGE:
The emission control system is warranted for 2 years or the length of the ECHO Inc. warranty, whichever is longer. If any emission-related part
on your equipment is defective, the part will be repaired or replaced by ECHO Inc. or its Authorized Service Representative.
OWNER'S WARRANTY RESPONSIBILITIES:
As the equipment/SORE owner, you are responsible for the performance of the required maintenance listed in your Operator's Manual. ECHO
Inc. recommends that you retain all receipts covering maintenance on your equipment/SORE however, ECHO Inc. cannot deny warranty solely
for the lack of receipts or for your failure to ensure the performance of all scheduled maintenance. As the equipment/SORE owner, you should be
aware that ECHO Inc. may deny you warranty coverage if your equipment/SORE or a part has failed due to abuse, neglect, improper maintenance
or unapproved modifications.
You are responsible for presenting your equipment/SORE to an ECHO Inc. authorized service representative as soon as a problem exists. The
warranty repairs should be completed in a reasonable amount of time, not to exceed 30 days. If a warrantable condition exists and there is no
Authorized Dealer within 100 miles, ECHO Inc. will pay to ship the unit to the nearest authorized dealer. If you have questions regarding your
warranty coverage, you should contact ECHO Inc. at 1-800-673-1558, web site WWW.ECHO-USA.COM or contact Shindaiwa at 1-877-986-
7783, web site WWW.SHINDAIWA.COM.
WHAT DOES THIS WARRANTY COVER?
ECHO Inc. warrants that your equipment/SORE was designed, built and equipped to conform with applicable EPA and C.A.R.B. emissions
standards and that your equipment/SORE is free from defects in material and workmanship that would cause it to fail to conform with applicable
requirements for 2 years or the length of the ECHO Inc. warranty, whichever is longer. The warranty period begins on the date the product is
purchased by an end user.
HOW WILL A COVERED PART BE CORRECTED?
If there is a defect in a part covered by this warranty, any ECHO Inc. Authorized Service Dealer will correct the defect. You will not have to pay
anything to have the part adjusted, repaired or replaced. This includes any labor and diagnosis for warranted repairs performed by the dealer. In
addition, engine parts not expressly covered under this warranty but whose failure is a result of a failure of a covered part will be warranted.
WHAT PARTS ARE COVERED?
Any applicable emission related part not scheduled for "required maintenance" will be repaired or replaced within the warranty period. The repaired
or replaced part will be warranted for the remaining ECHO Inc. warranty period.
Any warranted part that is scheduled only for regular inspection in the written instructions supplied is warranted for the warranty period stated
above. Any such part repaired or replaced under warranty will be warranted for the remaining ECHO Inc. warranty period.
Any emission related part scheduled for replacement during "required maintenance" is warranted for the period of time prior to the first scheduled
replacement point for that part. Any such part repaired or replaced under warranty shall be warranted for the remainder of the period prior to the
first scheduled replacement point for that part.
Any manufacturer-approved replacement part may be used in the performance of any warranty maintenance or repairs on emission related parts,
and must be provided without charge if the part is still under warranty.
Any replacement part that is equivalent in performance and durability may be used in non-warranty maintenance or repairs, and shall not reduce
the warranty obligations of the manufacturer.
Throughout the equipment/SORE warranty period, ECHO Inc. will maintain a supply of warranted parts sufficient to meet the expected demand
for such parts.
SPECIFIC EMISSION RELATED WARRANTED PARTS:
• Electronic Ignition System
• Catalytic Converter / Muffler Assembly
• Choke
• Spark Plug
• Carburetor (complete assembly or replaceable components)
• Fuel-Injection Assembly (or replaceable components)
• Fuel Cap Assembly
• Fuel Tank
• Air Filter
• Fuel Feed Line (and associated clamps/connectors as applicable)
WHAT IS NOT COVERED?
Any failure caused by abuse, neglect, improper maintenance, unapproved modifications, use of unapproved add-on parts/modified parts or
unapproved accessories.
99922201033
01/2010
This Emission Control Warranty is valid only for the U.S.A., it's Territories, and Canada.
CS-352
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notEs
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notEs
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sErviCing information
parts/sErial numbEr
Genuine ECHO Parts and ECHO REPOWER™ Parts and Assemblies
for your ECHO products are available only from an Authorized ECHO
Dealer. When you do need to buy parts always have the Model Num-
ber, Type and Serial Number of the unit with you. You can find these
numbers on the engine housing. For future reference, write them in the
space provided below.
Model No. ___________ Type _________SN. ______________
sErviCE
Service of this product during the warranty period must be performed
by an Authorized ECHO Service Dealer. For the name and address of
the Authorized ECHO Service Dealer nearest you, ask your retailer or
call: 1-800-432-ECHO (3246). Dealer information is also available on
our Web Site. When presenting your unit for Warranty service/repairs,
proof of purchase is required.
DEALER? Call
1-800-432-ECHO
1-800-432-3246
or
ECho ConsumEr proDuCt support
If you require assistance or have questions concerning the applica-
tion, operation or maintenance of this product you may call the ECHO
Consumer Product Support Department at 1-800-673-1558 from 8:30
am to 4:30 pm (Central Standard Time) Monday through Friday. Before
calling, please know the model and serial number of your unit.
CONSUMER PRODUCT
SUPPORT
1-800-673-1558
8:30 - 4:30 Mon - Fri C.S.T.
Warranty rEgistration
To ensure trouble free warranty coverage it is important that you regis-
ter your ECHO equipment on-line at www.echo-usa.com or filling out
the warranty registration card supplied with your unit. Registering your
product confirms your warranty coverage and provides a direct link
between you and ECHO if we find it necessary to contact you.
aDDitional or rEplaCEmEnt manuals
Replacement Operator, Safety Manuals, and Parts Catalogs are available from your ECHO dealer or at www.echo-
usa.com or by contacting ECHO Inc., 400 Oakwood Road, Lake Zurich, IL 60047 (800-673-1558). Always check the
ECHO Web Site for updated information.
Safety Videos are available from your Echo dealer. A $5.00 shipping charge will be required for each video.
ECHO, INCORPORATED
400 OakwOOd ROad
Lake ZuRich, iL 60047-1564
C19711005001-C19711999999
C19612020001/C19612999999
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