Echo CS-4510-18 User manual

1CS-4510
OPERATORS MANUAL
CHAIN SAW
CS-4510
WARNING
Read the instructions carefully and follow the rules for safe
operation.
Failure to do so could result in serious injury.
X7503350602
ECHO, INCORPORATED
400 Oakwood Road, Lake Zurich, Illinois 60047-1564
Phone : [phone]
8/18
THIS PRODUCT COMPLIES WITH CAN ICES2/NMB2

2
CS-4510
Copyright ©2017 All Rights Reserved.
The engine exhaust from this
product contains chemicals known
to the State of California to cause
cancer, birth defects or other
reproductive harm.
WARNING

3CS-4510
RULES FOR SAFE OPERATION
A. Kickback Safety Precautions for Chain Saw Users
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 rm grip on the saw with
both hands, the right hand on the rear
handle, and the left hand on the front
handle, when the engine is running.
Use a rm grip with thumbs and ngers
encircling the chain saw handles.
A rm grip will help you reduce
kickback and maintain control of the
saw.
Don’t let go.
3. Make sure that the area in which you
are cutting 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
maintenance instructions for the saw
chain.
7. Only use replacement bars and chains
specied by the manufacturer or the
equivalent.
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.
Either of these reactions may cause you to
lose control of the saw which could result
in serious personal injury.
The Kick GuardTM device is not installed
on the guide bar when you purchase your
ECHO chain saw.
The Kick Guardcan 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.

4
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1. Do not operate a chain saw with one hand!
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.
2. Do not operate a chain saw when you are
fatigued.
3. Use safety footwear, snug-tting clothing and
protective gloves.
Wear eye, hearing, and head protection
devices.
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.
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 muer 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 o 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
toward you or pull you o 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 bers 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 specically 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.
(For example, if improper tools are used to
remove the ywheel or if an improper tool is
used to hold the ywheel in order to remove
the clutch, structural damage to the ywheel
could occur and could subsequently cause the
ywheel to burst.)
18. When transporting your chain saw, use the
appropriate guide bar scabbard.
19. Spark arrestor muers approved to SAE
Standard J335 are standard on ECHO chain
saws to reduce the possibility of forest res.
Do not operate the chain saw with a loose or
defective muer.
Do not remove the spark arrestor screen.
20. When using a chain saw a re
extinguisher should be available.
21. When felling, keep at least 2 tree lengths
between yourself and your fellow
workers.
22. Follow instructions in your operator’s manual
for starting the chain saw.
23. Never adjust the guide bar or saw chain when
the engine operating.
24. When boring with the chain saw, the initial cut
should be introduced with the lower part of the
nose (tip) until the hole is suciently large so
as to introduce the entire nose (tip) of the guide
bar. This technique should reduce the danger
of kickback.
25. Allow your chain saw to cool before
refueling, and do not smoke while
refueling.
B. Other Safety Precautions

5CS-4510
WARNING
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.
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.
NOTICE
This enclosed message provides tips for use,
care and maintenance of the unit.
IMPORTANT
The enclosed message provides information
necessary for the protection of the unit.
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.
SYMBOLS AND SIGNS
CONTENTS
RULES FOR SAFE OPERATION .................................................................................................................... 3
SYMBOLS AND SIGNS ................................................................................................................................... 5
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....................................................................................................................................................... 17
CUTTING INSTRUCTION................................................................................................................................ 20
CHAIN AND GUIDE BAR COMBINATION................................................................................................. 25
MAINTENANCE AND CARE.......................................................................................................................... 26
SETTING THE SAW CHAIN............................................................................................................................ 31
TROUBLESHOOTING...................................................................................................................................... 33
STORAGE AFTER USE..................................................................................................................................... 34
TECHNICAL DATA........................................................................................................................................... 34
WARRANTY REGISTRATION SHEET........................................................................................................... 35
This chain saw is designed for cutting wood or wood products.
Do not cut solid metal, sheet metal, plastic or any non-wood materials.
Specications, 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.
CIRCLE AND SLASH SYMBOL
This symbol means the specic action
shown is prohibited. Ignoring these
prohibitions can result in serious or
fatal injury.

6
CS-4510
SYMBOL FORM
Locate this safety decal on your unit. The complete
unit illustration found in the “NOMENCLATURE OF
PARTS” section will help you locate them.
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.
Symbol form/shape Symbol description/application Symbol form/shape Symbol description/application
WARNING!!
Read and follow all safety
precaution in the instruction
manual. Failure to follow
instructions could result in
serious personal injury.
Choke control “Cold Start”
position (choke closed)
Wear eyes, ears and head
protection
Oil and gasoline mixture
Measured maximum kickback
value without triggering the
break, for the bar and chain
combination on the label
Chain oil ll
Tip contact may cause the
guide bar to move suddenly
upward and backward, which
may cause serious injury
Chain oiler adjustment
Contact of the guide bar tip
with any object should be
avoided
Purge pump
Both of the operator’s hands
must be used to operate the
chain saw LCarburetor adjustment
- Low speed mixture
Chain brake operation HCarburetor adjustment
- High speed mixture
STOP Emergency stop TCarburetor adjustment
- Idle speed
DECALS

7CS-4510
PACKING LIST
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 packing list to check for missing parts.
13 x 19 mm T-wrench
Operators manual Safety manual
ECHO chain saw
Warranty sheet
• •
• •
• •
• •
• •
OPERATORS
Saw chain
Guide bar
Kick GuardTM

8
CS-4510
NOMENCLATURE OF PARTS
* If a decal cannot be read, a new one can be
ordered from your ECHO dealer.
21
16
17
19
18
5
4
8
7
10
11
12
3
1
9
23
6
24
22
20
15
13
14
2
OPERATORS
25

9CS-4510
1. Operators manual - Included with unit.
Read before operation and keep for future
reference to learn proper, safe operating tech-
niques.
2. Safety manual - Describe operating and safety
instructions for this chain saw.
3. Spark arrestor muer - The spark arrestor muf-
er controls the exhaust noise and
prevents hot, glowing particles of carbon from
leaving the muer.
4. 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 o the handle.
This guard is used to lock the chain brake
which is to stop the saw chain rotation.
5. Rear handle (for the right hand) - Support
handle located towards the rear of the
engine housing.
6. Rear hand guard - Extension on the lower part
of the rear handle for protecting the hand from
the chain if it breaks or degrooves.
7. Clutch cover - Protective cover to the guide bar,
saw chain, clutch and sprocket when the chain
saw is in use.
8. Chain tension adjuster - Device to adjust chain
tension.
9. 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.
10. Spiked bumper - Device, tted in front of the
guide bar mounting point, acting as a pivot
when in contact with a tree or log.
11. Guide bar - The part that supports and guides
the saw chain.
12. Saw chain - Chain, serving as a cutting tool.
NOMENCLATURE OF PARTS
13. Bar tip guard - Anti-kickback device attached
on the bar nose.
14. Front handle (for the left hand) - Support
handle located at the front of the engine
housing.
15. Oil tank cap - For closing the oil tank.
16. Starter handle - Pull handle slowly until starter
engages then quickly and rmly.
When engine starts, return handle slowly.
Do not let handle snap back or damage to
unit will occur.
17. Fuel tank cap - For closing the fuel tank.
18. Momentary stop switch - button for momen-
tarily shorting ignition voltage, causing the
engine to stop. This is NOT an ON/OFF Igni-
tion switch.
19. Throttle trigger - Device activated by the
operator’s nger, for controlling the engine
speed.
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.
21. Purge pump - When starting engine, push
purge pump 3 or 4 times.
22. Choke control knob - Device for enriching the
fuel/air mixture in the carburetor to aid cold
starting.
Also activates fast idle throttle latch.
23. Cleaner cover lutch - Device for installing the
air cleaner cover.
24. Air cleaner cover - Covers air cleaner.
25. Cylinder cover - The cooling airow grill.
It covers the cylinder, spark plug and
silencer.

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CS-4510
OPERATOR SAFETY
VIBRATION AND COLD
• It is believed that a condition called Raynaud’s
Phenomenon, which aects the ngers of certain
individuals, may be brought about by exposure
to vibration and cold.
Exposure to vibration and cold may cause
tingling and burning followed by loss of color and
numbness in the ngers.
The following precautions are strongly
recommended because the minimum exposure
which might trigger the ailment is unknown.
• Keep your body warm, especially the head and
neck, feet and ankles and hands and wrists.
• Maintain good blood circulation by performing
vigorous arm exercises during frequent work
breaks and also by not smoking.
• Limit the number of hours of operation.
Try to ll 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 ngers, followed by whitening
and loss of feeling, consult your physician before
further exposing yourself to cold and vibration.
REPETITIVE STRESS INJURY
• It is believed that over-using the muscles and
tendons of the nger, hands, arms and
shoulders may cause soreness, swelling,
numbness, weakness and extreme pain to the
areas just mentioned.
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.
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.
• Reduce the speed and force in which you do the
repetitive movement.
• Do exercises to strengthen hand and arm
muscles.
• See a doctor if you feel tingling, numbness or
pain in your ngers, hands, wrists or arms.
The sooner RSI/CTS is diagnosed, the more
likely permanent nerve and muscle damage can
be prevented.
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.
If this guideline is not followed, hearing loss can
occur.
ECHO recommends wearing hearing protection
at all times.
WEAR PROPER CLOTHING
• Snug tting durable clothing should be worn.
Pants should have long legs, do not wear shorts.
Do not wear loose tting clothing, scarves,
neckties, jewelry or any item that may become
tangled in surrounding growth or the chain saw
itself.
• Wear shoes with non-skid soles.
Do not wear open toed shoes or operate unit
barefooted.
• Wear no-slip, heavy duty work gloves to improve
your grip on the chain saw handles.
The gloves also help reduce the transmission of
machine vibration to your hands.
HOT HUMID WEATHER
• Heavy protective clothing can increase operator
fatigue which may lead to heat stroke.
Schedule heavy work for early morning, or late
afternoon hours when temperatures are cooler.
AVOID HOT SURFACES
• During operation, the muer or catalytic muer
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
muer.
• Always keep exhaust area clear of ammable
debris during transportation or when storing,
otherwise serious property damage or personal
injury may result.

11 CS-4510
SPARK ARRESTOR MUFFLER
• The spark arrestor muer controls the exhaust
noise and prevents hot, glowing particles of
carbon from leaving the muer.
Make sure the spark arrestor screen is in good
repair and properly seated in the muer.
• 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.
CORRECT USE OF CHAIN BRAKE
Linear kickback
Rotational kickback
Chain moving downward at impact
Rotational kickback
Reduced radius belongs on top
Pinch
Kickback
This requirement also applies to all U.S. Forest
Service lands.
In some of these areas, the spark arrestor system
must be certied per USDA Forest Service
Regulation SAE J335.
Check with your local or state authorities for
specic regulations in your area.
Failure to follow these requirements is a violation
of the law.
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.
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
oces, your employer or your local dealer to
ensure that your chain saw conforms to the
required safety standard.
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ed on page 23.
For your own safety, do not remove the chain
brake system.
USA : ANSI Standard B175.1
Safety Requirement for chain saws
Canada : CSA Standard Z 62.1 CHAIN SAWS
WARNING
ANSI Standard B175.1 and CSA Standard Z
62.1 stipulate that the brake shall stop the
chain 0.12 seconds at an engine speed of
13,500 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 Standards B175.1 and Z62.1.

12
CS-4510
WARNING
Saw chain is sharp! Always wear gloves
when handling assembly, otherwise serious
personal injury may result.
GUIDE BAR AND SAW CHAIN
INSTALLATION/REMOVAL
NOTICE
• Move the chain brake lever (Front hand guard)
fully rearward to remove or install the clutch
cover to chain saw.
• Align the brake connector of the clutch cover to
the groove on the side of the brake lever (Front
hand guard).
1. Remove spark plug lead. (See maintenance sec-
tion)
2. Remove the clutch cover nuts and remove clutch
cover.
3. Remove bar and saw chain if necessary. See
“Maintenance and Care” section for guide bar /
saw chain maintenance procedures.
4. 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.
5. Unlock the chain brake, and install the clutch
cover over the guide bar studs. Ensure chain
tension adjuster pin ts into the guide bar
adjuster hole, brake band is positioned around
clutch drum. Tighten clutch cover nuts nger
tight.
6. Turn saw over, and check brake band for correct
position on clutch drum. If brake band is not in
place around drum, remove cover, make sure
brake is unlocked, and reinstall. Tighten clutch
cover nuts nger tight.
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 replacing cover. Do not
use saw if chain brake does not function
properly.
PREPARATION FOR USE
Clutch cover
Brake lever
(Front hand guard)
Two nuts
Unlock chain brake
Guide bar adjuster hole
Nuts
Clutch
Guide bar studs
Clutch Guide bar
adjuster hole
Clutch cover
Adjuster pin
Brake connector
WARNING
Momentary stop switch automatically
returns to run position. Engine can start
unintentionally. Always remove spark plug
lead from spark plug before assembling
or performing maintenance procedures or
serious personal injury may result.

13 CS-4510
ADJUSTING CHAIN TENSION
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 maintenance sec-
tion)
2. Unlock the chain brake and loosen a clutch
cover nuts, if necessary.
3. Hold the bar nose up, and turn the tension
adjuster clockwise until chain ts snugly against
underside of the bar.
4. Tighten both nuts with the bar nose held up.
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.
Proper tension Improper tension
Unlock chain brake
Tension adjuster
Direction to tension the chain

14
CS-4510
WARNING
Diesel fuels and 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. Use of diesel or 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. Diesel or alternative fuels may also
cause premature deterioration of fuel lines, gaskets,
carburetors and other engine components.
IMPORTANT
• Echo brand 2-stroke oils may be mixed at 50:1 ratio
for application in all Echo engines sold in the past
regardless of ratio specied in those manuals.
FUEL AND LUBRICANT
FUEL STATEMENT
Fuel Requirements
Gasoline - Use 89 Octane [R+M/2] (mid grade or
higher) gasoline known to be good quality. Gasoline
may contain up to 10% Ethanol (grain alcohol) or 15%
MTBE (methyl tertiary-butyl ether). Gasoline contain-
ing methanol (wood alcohol) is NOT approved. Use of
ECHO brand fuel is recommended to extend engine life
in all air-cooled 2-stroke and 2/4-stroke hybrid engines.
Two Stroke Oil - A two-stroke engine oil, such as ECHO
brand 2-stroke oils, meeting ISO-L-EGD (ISO/CD 13738)
and J.A.S.O. FD Standards must be used. ECHO brand
2-stroke oils meet these standards. Engine problems
due to inadequate lubrication caused by failure to use
an ISO-L-EGD (ISO/CD 13738) and J.A.S.O. M345-FD
certied oil will void the two-stroke engine warranty.
WARNING
2-Stroke engine oil contains petroleum distillates
and other additives that may be harmful if
swallowed. Heated oil can release vapors that can
cause ash re, or ignite with explosive force. Read
and follow the oil manufacturer’s instructions, and
observe all safety warnings and precautions for
handling ammable liquids. For more detailed safety
and rst aid information, visit www.echo-usa.com
for a copy of the Material Safety Data Sheet.
• KEEP OUT OF REACH OF CHILDREN.
• If swallowed, do not induce vomiting. CALL
PHYSICIAN OR A POISON CONTROL CENTER
IMMEDIATELY.
• WEAR SAFETY GLASSES when mixing or handling.
• AVOID repeated or prolonged skin contact
• AVOID inhaling oil mists or vapors.

15 CS-4510
Fuel Mix Chart 50 : 1
U.S. Metric
Gasoline Oil Gasoline Oil
Gallons US. . oz. L cc
1 2.6 5 100
2 5.2 10 200
5 13 25 500
HANDLING FUEL
DANGER
Fuel is VERY ammable. Use extreme care when mixing,
storing or handling, or serious personal injury may
result.
• Use an approved fuel container. Mark fuel containers
as containing 2-stroke mixture fuel.
• DO NOT smoke near fuel.
• DO NOT allow ames 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
RUNNING!
• DO NOT ll fuel tanks indoors. ALWAYS ll fuel tanks
outdoors over bare ground.
• DO NOT overll 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 3 m (10 ft.) from refueling location before
starting the engine.
• Gasoline Vapor Is Heavier Than Air, And Can Travel
Along The Ground To Nearby Sources Of Ignition Such
As Electrical Motors, Pilot Lights, And Hot Or Running
Engines. Vapors Ignited By An Ignition Source Can Flash
Back To The Fuel Container, Resulting In An Explosion,
Fire, Serious Or Fatal Injuries, And Extensive Property
Damage.
Tank cap
Loosening direction
WARNING
Momentary stop switch automatically returns
to run position. Engine can start unintentionally
when starter handle is pulled. Always remove
spark plug lead from spark plug before pulling
starter handle, otherwise severe personal injury
may result.
Fueling 
When fuel tank cap or oil tank cap is dicult to remove,
remove spark plug lead, pull starter handle slowly, and use
starter handle to assist in removing cap.
Mixing Instructions 
1. Fill an approved fuel container with half of the required
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 remix.
IMPORTANT
Spilled fuel is a leading cause of hydrocarbon emissions.
Some states may require the use of automatic fuel shut-
o containers to reduce fuel spillage.
• Empty the fuel tank prior to storing the unit. Return
unused fuel to an approved fuel storage container.
Storage - Fuel storage laws vary by locality. Contact your
local government for the laws aecting your area. As a
precaution, store fuel in an approved, airtight container.
Store in a well-ventilated, unoccupied building, away
from sparks and ames.
Stored fuel ages. Do not mix more fuel than you expect
to use in 30 days, 90 days when a fuel stabilizer is
added.
Stored two-stroke fuel may separate. ALWAYS shake fuel
container thoroughly before each use.
Used oil and gasoline, and soiled towels are hazardous
waste materials. Disposal laws vary by locality.

16
CS-4510
EMISSION DATA
EMISSION CONTROL
(EXHAUST and EVAPORATIVE) EPA 2010 and/
or C.A.R.B. TIER III
The emission control system for the engine is EM/
TWC (Engine Modication and 3-way Catalyst)
and for the fuel tank the Control System is EVAP
(Evaporative Emissions) or N (for nylon tank).
Evaporative emission may be applicable to
California models only.
An Emission Control Label is located on the
engine. (This is an example only, information on
label varies by engine family).
PRODUCT EMISSION DURABILITY
(EMISSION COMPLIANCE PERIOD)
The 300 hours emission compliance period is
the time span selected by the manufacturer
certifying the engine emissions output meets
applicable emissions regulations, provided that
approved maintenance procedures are followed
as listed in the Maintenance Section of this
manual.
EMISSION CONTROL INFORMATION
ENGINE FAMILY: #EHXS.0454SA DISPLACEMENT: 45.0 cc
EMISSION COMPLIANCE PERIOD: 300 Hours
THIS ENGINE MEETS U.S. EPA EXH/EVP EMISSION
REGULATIONS FOR MODEL YEAR * * * * REFER TO OWNER’S MANUAL
FOR MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS.
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Oil tank cap
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.
• 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 rell chain oil.
Fuel tank cap
Cap indication
Oil/fuel tanks are indicated by the following
illustrations.

17 CS-4510
OPERATION
Chain brake
Starter handle
Throttle trigger
Choke
Throttle trigger lockout
Purge pump
WARNING
• After choke control knob is pulled and
then knob is returned to original position,
throttle remains slightly open (fast idle latch
condition).
• The chain will attempt to move when
engine is started with fast idle throttle latch
engaged.
• Do not start engine before chain brake is
activated.
CAUTION
• After starting the engine, immediately
squeeze and release throttle trigger to
release fast idle throttle latch, otherwise
severe brake damage may occur.
• Never use fast idle throttle latch for cutting.
• Use the fast idle throttle latch only in
starting.

18
CS-4510
Chain brake
Starter handle
Throttle trigger
Choke
Throttle trigger lockout
Purge pump
Chain brake
Starter handle
WHEN THE ENGINE IS COLD
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 ll fuel above the shoulder
level of fuel tank.
• Fill the chain oil tank with lubricant.
Do not over ll.
• Pull choke control knob all the way out.
(Choke position )
• Push purge pump 3 to 4 times or until fuel is vis-
ible in purge pump.
• Securely hold the chain saw as shown and
pull starter handle several times until rst ring
sound.
• Push choke control knob all the way in.
• Pull starter handle again to start the engine.
• When engine starts, immediately squeeze and
release throttle trigger to release fast idle throttle
latch otherwise severe brake damage may occur.
WHEN THE ENGINE IS WARM
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.
• Conrm there is fuel and chain oil in the tanks.
• Securely hold the chain saw as shown and pull
starter handle.
• Choke may be used if necessary, but after first
firing sound, squeeze and release throttle trigger
to release fast idle throttle latch otherwise severe
brake damage may occur.

19 CS-4510
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 4,150 r/min approximately.
• Conrm 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
• Release throttle trigger and allow engine to idle.
• Push the momentary stop switch until the engine
is stopped.
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 moentary stop switch before
starting the engine again.
CHECKING CHAIN TENSION
• Chain tension should be checked frequently
during work and corrected as necessary.
• Tension the chain as tight as possible, but so it
can still be pulled easily along the bar by hand.
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.
Momentary
stop switch
Throttle trigger
Unlock chain brake
STOP

20
CS-4510
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
earmus 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 dicult 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 nger.
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 cutting should be relatively
eortless.
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 dicult.
Some material may adversely aect 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.
Kickback