OPERATORS MANUAL
CHAIN SAW
CS-2511T
THIS PRODUCT COMPLIES WITH CAN ICES2/NMB2
WARNING
This chain saw is designed especially for tree service by a trained
operator.
Read the instructions carefully and follow the rules for safe
operation.
Failure to do so could result in serious injury.
ECHO, INCORPORATED
400 Oakwood Road, Lake Zurich, Illinois 60047-1564
Phone : 847-540-8400
X7503332501
8/18
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For questions regarding terms used in this manual, visit:
https://www.echo-usa.com/Support-Help/Technical-Documents
OR
https://www.shindaiwa-usa.com/Tech-Support/Technical-Documents
WARNING
The engine exhaust from this
product contains chemicals known
to the State of California to cause
cancer, birth defects or other
reproductive harm.
WARNING
Cancer and Reproductive Harm
www.P65Warnings.ca.gov
Copyright
2018
©
CS-2511T
All Rights Reserved.
2
WARNING!
RULES FOR SAFE OPERATION
A. Kickback Safety Precautions 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.
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 Guard can be used in a majority of
cutting operations, and is especially
recommended for beginners,
homeowners, or chain saw novices.
Most cutting operations can be
accomplished with the Kick Guard in place.
Do not rely exclusively upon the safety devices built into your saw.
As a chain saw user, you should take
several steps to keep your cutting jobs free
from accident or injury.
1. With a basic understanding of
kickback, you can reduce or eliminate
the element of surprise.
Sudden surprise contributes to
accidents.
2. Keep a good 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 specied by the manufacturer
or the equivalent.
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B. Other Safety Precautions
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.
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 specically 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 muers 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 muer.
Do not remove the spark arrestor screen.
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 muer 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
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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 suciently 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.
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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 STATEMENTS ........................................................................................................................... 35
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.
Specications, 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
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.
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.
CIRCLE AND SLASH SYMBOL
This symbol means the specic action
shown is prohibited. Ignoring these
prohibitions can result in serious or
fatal injury.
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SYMBOL FORM
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.
Wear eyes, ears and head
protection
Tip contact may cause the
guide bar to move suddenly
upward and backward, which
may cause serious injury
Contact of the guide bar tip
with any object should be
avoided
Both of the operator’s hands
must be used to operate the
chain saw
Hot surface
Symbol form / shape
L
Symbol description / application
Choke control “Cold Start”
position (choke closed)
Oil and gasoline mixture
Chain oil ll
Chain oiler adjustment
Purge pump
Carburetor adjustment
- Low speed mixture
STOP
DECALS
Chain brake operation
Emergency stop
Carburetor adjustment
- High speed mixture
H
Carburetor adjustment
T
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.
- Idle speed
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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.
ECHO chain saw
Instruction manual Safety manual
OPERATORS
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 16 mm T-wrench, L-wrench (T27)
Sprocket nose bar
Kick Guard
Saw chain
Warranty sheet
• •
• •
• •
• •
• •
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NOMENCLATURE OF PARTS
OPERATORS
4
3
5
1
6
7
8
9
10
11
2
12
24
23
22
* If a decal cannot be read, a new one can be
ordered from your ECHO dealer.
14
13
15
16
21
20
19
18
17
25
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NOMENCLATURE OF PARTS
1. Operators manual - Included with unit.
Read before operation and keep for future
reference to learn proper, safe operating techniques.
2. Safety manual - Describe operating and safety
instructions for this chain saw.
3. 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.
4. Rear handle (for the right hand) - Support
handle located on the top of the engine housing.
5. Choke control knob - Device for enriching the
fuel/air mixture in the carburetor to aid cold
starting.
Also activates fast idle throttle latch.
6. Muer cover - Cover the muer not to make
operator touch to hot surface of muer.
7. Chain tension adjuster - Device to adjust chain
tension.
8. Clutch cover - Protective cover to the guide bar,
saw chain, clutch and sprocket when the chain
saw is in use.
13. Front handle (for the left hand) - Support
handle located at the left side of the engine
housing.
14. Fuel tank cap - For closing the fuel tank.
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. Spark plug cover - Covers spark plug.
18. Spark plug cover lutch - Device for installing
the spark plug cover.
19. Cleaner cover lutch - Device for installing the
air cleaner cover.
20. Air cleaner cover - Covers air cleaner.
21. Purge pump - When starting engine, push
purge pump 3 or 4 times.
22. Throttle trigger - Device activated by the
operator’s nger, for controlling the engine
speed.
23. 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.
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. Guide bar - The part that supports and guides
the saw chain.
11. Saw chain - Chain, serving as a cutting tool.
12. Bar tip guard - Anti-kickback device attached on
the bar nose.
24. Ignition switch - Device for connecting and
disconnecting the ignition system and thus
allowing the engine to be started or stopped.
25. Lifting hook - If working o the ground the
operator must be trained in safe climbing
techniques and use of all recommended
safety equipment.
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OPERATOR SAFETY
VIBRATION AND COLD
• It is believed that a condition called Raynaud’s
Phenomenon, which aects 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 muer or catalytic muer
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 muer.
• Don't block exhaust area. Always keep exhaust
area clear of ammable debris otherwise serious
property damage or personal injury may result.
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10
SPARK ARRESTOR MUFFLER
• The spark arrestor muer controls the exhaust
noise and prevents hot, glowing particles of
carbon from leaving the muer.
Make sure the spark arrestor screen is in good
repair and properly seated in the muer.
• 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
Rotational kickback
Reduced radius belongs on top
Rotational kickback
This requirement also applies to all U.S. Forest Service lands.
In some of these areas, the spark arrestor system
must be certied per USDA Forest Service
Regulation SAE J335.
Check with your local or state authorities for
specic 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
oces, 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
specied on page 23.
For your own safety, do not remove the chain brake
system.
USA : ANSI Standard B175.1
Safety Requirement for chain saws
Chain moving downward at impact
Linear kickback
Kickback
Pinch
Canada : CSA Standard Z 62.1 CHAIN SAWS
CSA Standard Z 62.3 KICKBACK
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 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 Standards
B175.1 and Z62.1.
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PREPARATION FOR USE
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.
Unlock chain brake
• Align the brake connector of the clutch cover to
the groove on the side of the brake lever (Front
hand guard).
WARNING
Brake connector
Clutch
Brake connector
Spiked bumper; option
A nut
Clutch cover
Adjuster pin
Clutch cover
Brake lever
(Front hand guard)
Guide bar stud
Guide bar
adjuster hole
1. Remove spark plug lead. (See page 26)
2. Loosen the clutch cover nut 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 stud 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 stud. Ensure chain
tension adjuster pin ts into the guide bar
adjuster hole, brake band is positioned around
clutch drum. Tighten clutch cover nut 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 nut 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.
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12
Unlock chain brake
ADJUSTING CHAIN TENSION
IMPORTANT
Always loosen clutch cover nut before turning
the chain tension adjuster, otherwise the clutch
cover and tensioner will be damaged.
1. Remove spark plug lead. (See page 26)
2. Unlock the chain brake and loosen two clutch
cover nut, 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 a nut with the bar nose held up.
Direction to tension the chain
Tension adjuster
Improper tensionProper tension
Air cleaner cover
Lifting hook
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 - 15 - 20 N·m (133 to 177
in. lb.).
7. Keep chain properly tensioned at all times.
CHECKING LIFTING HOOK
IMPORTANT
• If your chain saw falls from height or receives a
strong impact to the lifting hook, please check
its integrity by opening the air cleaner cover
(see page 26 “Air lter”) to assess that the ring
and its associated parts are not damaged or
broken.
• In case of being damaged or broken, do not
continue using the unit with the lifting hook.
• If you have any doubt with regards to their
condition, have the unit checked out by your
nearest authorized ECHO dealer.
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FUEL AND LUBRICANT
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.
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.
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 containing 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
certied oil will void the two-stroke engine warranty.
• 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.
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 specied in those manuals.
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14
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 overll 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.
IMPORTANT
Spilled fuel is a leading cause of hydrocarbon emissions.
Some states may require the use of automatic fuel shuto 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 aecting 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.
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.
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
Fueling -
When fuel tank cap or oil tank cap is dicult to remove,
remove spark plug lead, pull starter handle slowly, and use
starter handle to assist in removing cap.
Tank cap
Loosening
direction
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.
15
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Cap indication
Oil/fuel tanks are indicated by the following
illustrations.
Oil tank cap
Fuel tank cap
EMISSION DATA
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 rell chain oil.
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 Modication 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.xxxxxx DISPLACEMENT: 25.0 cc
EMISSION COMPLIANCE PERIOD: 300 Hours
THIS ENGINE MEETS * * * * U.S. EPA EXH/EVP & CALIFORNIA
EXH/EVP EMISSION REGULATIONS FOR S.O.R.E. REFER TO OWNER’S
MANUAL FOR MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS.
***????
CS-2511T
16
OPERATION
Choke
Chain brake
Start / Run
Ignition switch
Purge pump
Choke control knob
WARNING
• After choke control knob is turned 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.
Starter handle
17
CS-2511T
Choke
Chain brake
Start / Run
Ignition switch
Purge pump
Choke control knob
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.
• Move ignition switch to “Run” position.
• Push purge pump 3 to 4 times or until fuel is
visible in purge pump.
• Turn choke control knob counterclockwise.
(Choke position )
• Securely hold the chain saw as shown.
When starting the chain saw place the unit on
a at ground and hold the front handle with left
hand and hold rmly the rear end of rear handle
with right knee and pull starter handle with right
hand several times until rst ring sound.
Choke control knob
Chain brake
Open choke
• Turn choke control knob clockwise.
(Open position )
• Pull starter handle 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.
• Conrm 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 may be used if necessary, but after rst
ring sound, squeeze and release throttle trigger
to release fast idle throttle latch otherwise severe
brake damage may occur.
CS-2511T
18
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 4300 r/min approximately.
• Conrm 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 place ignition switch
in “STOP” position.
Throttle trigger
NOTICE
If engine does not stop, turn choke control knob
counterclockwise to stop engine.
Return the unit to your authorized ECHO dealer
to check and repair ignition 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.
19
CS-2511T
CUTTING INSTRUCTION
GENERAL
• Read the ECHO “CHAIN SAW SAFETY
MANUAL” included with your chain saw for
additional cutting and safety instructions.
• Wear suitable hearing protection such as
earmus 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.
Kickback
It is dicult 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.
CAUTION
CS-2511T
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
eortless.
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 dicult.
Some material may adversely aect 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.
20
Direction of fall
3 m (10 feet)
45°
Retreat
45°
Not this way
Retreat
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 rst decide where that is!
Before cutting, clear the area around the tree.
You will need good footing while working and you
should be able to work the saw without hitting any
obstacles.
Next, select a path of retreat.
When the tree begins to fall you should retreat
away from the direction of fall at a 45-degree angle
and at least 3 m (10 feet) from the trunk to avoid
the trunk kicking back over the stump.
Direction of fall
First cut
Notch
Second cut
One-third tree diameter
5 cm (2 in.)
Hinge
Felling cut
5 cm (2 in.)
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.
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.
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.
When the tree starts to fall, kill the engine, place
the saw on the ground and make your retreat
quickly.
21
CS-2511T
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.
Uphill position
Finish cut
First cut
Board or at stones
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 at
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 ying debris.
To cut the trunk, use the bucking and two-cut
sequence shown.
The rst cut should be no deeper than one-third the
trunk diameter.
DANGER
• Kickback is generated when the rotation of
the chain is arrested for some reason.
The most dangerous eect 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.
• Comply with the safety precautions as
listed in this Manual and Safety Manual.
CS-2511T
22
Kickback motion
Improper thrust cutting
Kickback motion
When the bar nose hits another tree, etc.
CHAIN BRAKE OPERATION
• Set the lever in the unlocked position before
starting to cut.
• 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.
• Do not attempt to operate the engine with the
brake locked.
Chain brake function
When the lever is pushed forward, chain brake
instantly stops the chain.
Chain brake unlock
When the lever is fully pulled toward the
operator, brake is unlocked.
TESTING THE BRAKE
• Start the engine on a solid level surface and run
at a fast idle until warm.
• Hold the saw rmly by the handles and
accelerate the engine to a fast idle.
• Slowly operate the chain brake lever while
holding the saw rmly on the ground.
When the brake lever trips, the chain should
stop.
Immediately release the throttle trigger.
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.
• Conrm that the brake works properly before
each use.
• If the chain brake is clogged with wood chips,
function of the brake may deteriorate.
Always keep the device clean.
• Do not increase engine revolution while the
chain brake is locked.
• Use the chain brake only in starting or in
emergencies.
• When using throttle latch at starting, keep the
chain brake locked.
And after starting the engine, unlock the brake
immediately.
IMPORTANT
Do not allow the saw to tip forward in order to
avoid damage to the chain.
23
CS-2511T
End of the guide bar may be placed at the
height of about 40 cm (16 in.).
40 cm
(16 in.)
AUTOMATIC CHAIN BRAKE
Kickback produced from the tip of the guide bar will
trip the automatic chain brake. To make sure that
the automatic chain brake operates properly, follow
these steps:
1. Stop the engine.
2. Hold the saw with the guide bar approximately
40 cm (16 in.) above a wooden surface. Right
hand should hold the rear handle, and left hand
should hold the front handle.
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.
Air shutter
Spark plug cover
Cold weather position
(snowman mark)
Warm weather position
(sun mark)
WINTER OPERATION
Use the air shutter to prevent carburetor trouble in
winter.
• Open the spark plug cover (see page 26 “Spark
plug cover”).
• Push down the air shutter to cold weather
position.
• For operation above 5 ºC (41°F), return (pull up)
the air shutter to its original place (sun mark
appears).
NOTICE
For operation at normal temperature, return the
air shutter to its original position (with the sun
mark appears). (5°C, 41°F)
It causes over heating of the engine.
CS-2511T
24
CHAIN AND GUIDE BAR COMBINATION
The following combinations are recommended for model CS-2511T.
Guide bar Saw chain
Length mm (in.)
305 (12)
356 (14)
ECHO Part No.
Double Guard
12A0CD3745
12A4CD3745 90PX45CQ
14A0CD3752 91PXL52CQ
14A4CD3752 90PX52CQ
Pitch mm (in.) ECHO Part No. Links
9.53 (3/8)
GUIDE BAR
(Low-kickback)
Replacement guide bars.
The following guide bars may be considered to
have equivalent kickback energy.
• Sprocket nose guide bars of the same length
and nose radius, same pitch and having the
same number of teeth.
• Hard nose guide bars of the same length and
nose radius as a sprocket nose bar.
91PXL45CQ
45
52
SAW CHAIN
(Low-kickback)
WARNING
Do not use replacement saw chain unless
it has been designated as meeting the ANSI
B175.1 or CSA Z62.3 kickback performance
requirements, when tested on the
representative sample of chain saws below
3.8 c.i.d. specied in ANSI B175.1 and CSA
Z62.3.
NOTICE
LOW KICKBACK SAW CHAIN meets the
kickback performance requirements of ANSI
B175.1 or CSA Z62.3 (safety requirements for
gasoline-powered chain saws).
25
CS-2511T
MAINTENANCE AND CARE
Your ECHO chain saw is designed to provide many
hours of trouble free service. Regular scheduled
maintenance will help your chain saw achieve that
goal. If you are unsure or are not equipped with the
necessary tools, you may want to take your unit to
an ECHO Service Dealer for maintenance. To help
you decide whether you want to DO-IT-YOURSELF
or have the ECHO Dealer do it, each maintenance
task has been graded. If the task is not listed ask
your ECHO dealer for repairs.
SKILL LEVELS
Level 1 = Easy to do. Most required tools come
with unit.
Level 2 = Moderate diculty. Some specialized
tools may be required.
Click HERE or go to http://www.echo-usa.com/
products/maintenance-kit for information on Maintenance Kits.
MAINTENANCE INTERVALS
Component / system Maintenance procedure
Required
Skill level
Daily or
Before use
Every refuel
Air Filter Inspect / Clean / Replace 1 I / C * R *
Automatic Oiler Inspect / Adjust 1 I
3 Months
Yearly
Oil Filter Inspect / Clean / Replace 1 I I / C *
Fuel System Inspect / Replace 1 I * I *
Fuel Filter Inspect / Replace 1 I * I / R *
Fuel Cap Gasket Inspect / Replace 1 I * R *
Guide Bar and Sprocket Nose Inspect / Clean / Lubricate 1 I / C * I
Saw Chain
Sprocket Inspect / Replace 2 I *
Spark Plug Inspect / Clean / Replace 1
Cylinder Fins /Starter Housing Inspect / Clean 2 I / C
Muer Spark Arrestor Inspect / Clean / Replace 2
Cylinder Exhaust Port Inspect / Clean / Decarbon 2 I / C
Recoil Starter Rope Inspect / Clean 1 I / C *
Screws / Nuts / Bolts Inspect / Tighten / Replace 1 I *
Maintenance Procedure Letter Codes:
I = Inspect
C = Clean
R = Replace
Maintenance Procedure Notes:
* = All recommendations to replace are based
on the nding of damage or wear during
inspection.
Inspect / Sharpen / Replace /
Tensioning
IMPORTANT
Time intervals shown are maximum.
Actual use and your experience will determine
the frequency of required maintenance.
2 I *
I / C / R *
I / C / R *
CS-2511T
26
Idle adjusting screw
Low speed needle (L)
High speed needle (H)
CARBURETOR ADJUSTMENT
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.
1. Before adjusting carburetor clean or replace air
lter and muer “Spark Arrestor Screen”.
2. Make sure the bar and chain are properly
adjusted.
3. Start engine and run several minutes to bring to
operating 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.
Turn “L” speed needle midway between full
clockwise (CW) stop and CCW stop.
5. Idle Speed Adjustment:
• 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 ½ turn.
High Altitude Operation
This engine has been factory adjusted to maintain
satisfactory starting, emission, and durability
performance up to 330 m (1100 ft) above sea
level (ASL) (96.0 kPa). To maintain proper engine
operation above 330 m (1100 ft) ASL the carburetor
may need to be adjusted by an authorized ECHO
service dealer.
IMPORTANT
If the engine is adjusted for operation above 330
m (1100 ft) feet ASL, the carburetor must be
readjusted when operating the engine below 330
m (1100 ft) feet ASL, otherwise severe engine
damage may result.
WARNING
Cutting attachment must not move when unit
is idling.
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.
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 3200 r/min.
CAUTION
When starting, idling adjustment speed
should be adjusted not to rotate the saw
chain.
Correct idle speed is adjusted 3200 r/min.
Or ½ turn CCW from the point the chain
stops moving.
When you experience trouble with the
carburetor, contact your dealer.
27
CS-2511T
Air cleaner cover
T-wrench
Cleaner cover latch
Lifting hook
Air cleaner cover
Air lter
Cleaner cover latch
Lifting hook
AIR FILTER
• Check before every use.
• Close choke ( ).
• Raise the lifting hook, and towards the lower
end.
• Release the cleaner cover latch with T-wrench,
and remove the air cleaner cover and the air
lter.
• Brush o dust lightly, or clean with compressed
air, or replace the air lter.
• Reinstall the air lter and cover, engage latch
and return the lifting hook.
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 re.
Stop using the machine immediately and request
your dealer to inspect or replace.
RELEASE SPARK PLUG COVER LATCH
Spark plug cover latch
T-wrench
Spark plug cover
ENGAGE LATCH
0.6 - 0.7 mm (0.024-0.026 in.)
SPARK PLUG COVER
• Release the spark plug cover latch with Twrench.
• Inspect the spark plug, clean or replace if
damaged.
• Reinstall the spark plug and cover, engage latch
with T-wrench.
SPARK PLUG
• Check periodically.
• The standard spark gap is 0.6 - 0.7 mm
(0.024-0.026 in.).
• Correct the spark gap if it is wider or narrower
than the standard gap.
• Fastening torque: 10 - 15 Nm
(87 to 130 in. lb.).
CS-2511T
28
Fuel lter
Oil lter
Fuel tank cap
Oil tank cap
FUEL FILTER
• Check periodically.
• Do not allow dust to enter fuel tank.
• A clogged lter will cause diculty in starting
engine or abnormalities in engine performance.
• Pull the fuel lter out through fuel inlet port with
a piece of steel wire or the like.
• When the lter is dirty, replace it.
• When the inside of the fuel tank is dirty, rinsing
the tank out with gasoline can clean it.
OIL FILTER
• Check periodically.
• Do not allow dust to enter into oil tank.
• A clogged oil lter will aect the normal
lubricating system.
• Pull it out through oil lling hole with a piece of
steel wire or the like.
• If the lter 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.
Clutch
(Sprocket)
Worn : 0.5 mm (0.02 in.)
Oil hole
Groove
GUIDE BAR
• Clean before using.
- Clean the groove of the guide bar with a small
screwdriver.
- 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.
SPROCKET
• 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.
29
CS-2511T
Flyheel magneto
Two bolts
Muer cover
Recoil starter
Muer
Ignition coil
Cylinder ns
Air guide plate
CYLINDER FINS
NOTICE
If you use the unit with the condition of being
clogged by dirt or dust, it may cause breakage
of the unit or melting damage of covers around
muer.
If you are not able to remove the dirt or dust, ask
your dealer.
• Use a wood or plastic scraping tool and a soft
brush to remove dirt and dust.
• Check periodically.
• Remove the recoil starter and the air guide plate.
• Remove dirt and dust from the recoil starter and
the air guide plate.
• Clogged ns will result in poor engine cooling.
• Remove dirt and dust from between ns to let
cooling air pass easily.
• Clean the periphery of the ignition coil and the
ywheel magneto.
• Assemble the components in reverse order.
MUFFLER SPARK ARRESTOR
• Remove spark plug lead.
• Remove two bolts and the muer cover.
• Remove spark arrestor screen from muer
body.
• Clean carbon deposits from muer components.
• Replace screen if it is cracked, or has holes
burned through.
• Assemble components in reverse order.
Spark arrestor screen
Adjusting screw
CS-2511T
NOTICE
Carbon deposits in muer will cause drop in
engine output. Spark arrestor screen must be
checked periodically.
AUTOMATIC OILER
DecreaseIncrease
• The discharge volume of the automatic oiler is
adjusted to 7 mL/min approximately at 7000
r/min, prior to shipment from factory.
- To increase the delivery volume, turn the
adjusting screw counterclockwise.
When the screw touches stopper and stops,
this position indicates maximum discharge
volume. (13 mL/min at 7000 r/min)
- Do not turn the adjusting screw beyond the
maximum or minimum limit of volume
adjustment.
30
SETTING THE SAW CHAIN
Preset tie strap
Drive link
Right hand cutter
Tie strap
Sharpen lower edge
Left hand cutter
Top plate
Side plate
Guard link
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.
Keep the lower edge of the drive link sharp
where indicated.
Depth gauge
Keep this angle
30°
Push le as shown
Hold the le horizontally
SETTING SAW CHAIN
• For setting saw chain, round le (91PXL: 4.0 mm
5/32 in. diameter or 90PX: 4.5 mm diameter)
and at le are used.
• To keep correct position and correct angle, use
the le holder (Sure Sharp®).
90°
31
CS-2511T
1/5
One fth of le diameter remains
above cutter edge
Depth gauge tool
• Place the depth gauge tool rmly on guide bar
so that depth gauge protrudes.
Then le top of depth gauge with the at le until
at with top of the depth gauge tool.
Remove until
at with tool
- Be sure to round o the front edge of the
depth gauge.
30°
Top plate ling angle
Depth gauge
Round o the edge
55°
Top plate cutting angle
0.65 mm
(0.025 in.)
Parallel
Properly led cutters are shown in illustration.
When setting of the chain is nished, soak it in oil
and wash away lings completely before using.
- When chain has been led on the bar,
supply sucient oil to it, rotate the chain
slowly to wash away the lings before using
again.
- If the chain saw is operated with lings
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.
NOTICE
These angles are referred to as Oregon 91PXL
or 90PX.
To sharpen other follow chain manufacturer’s
instruction.
CS-2511T
32
TROUBLESHOOTING
Problem
Engine — hard to start Cause Solution
—
does not start
Engine
cranks
Engine
does not
crank
Engine
runs
Fuel at
carburetor
Fuel at
cylinder
Spark at end
of plug wire
Spark at plug No spark at plug • Spark gap incorrect • Adjust 0.65 mm (0.026 in.)
Dies or accelerates poorly • Air lter dirty • Clean or replace
No fuel at
carburetor
No fuel at
cylinder
Muer wet with
fuel
No spark at end
of plug wire
• Fuel lter clogged • Clean or replace
• Fuel line clogged • Clean
• Carburetor • Ask your ECHO dealer
• Carburetor • Ask your ECHO dealer
• Fuel mixture is too rich • Open choke
• Clean / replace air lter
• Adjust carburetor
• Ask your ECHO dealer
• Ignition switch o • Turn switch on
• Electrical problem • Ask your ECHO dealer
• Covered with carbon • Clean or replace
• Fouled with fuel • Clean or replace
• Spark plug defective • Replace plug
• Internal engine problem • Ask your ECHO dealer
• Fuel lter dirty • Clean or replace
• Fuel vent blocked • Clean
• Spark plug • Clean and adjust / replace
• Carburetor • Adjust
• Cooling system blocked • Clean
• Exhaust port / spark
arrestor screen blocked
• Clean
WARNING
Fuel vapors are extremely ammable and
may cause re and/or explosion. Never test
for ignition spark by grounding spark plug
near cylinder plug hole, otherwise serious
personal injury may result.
33
CS-2511T
STORAGE AFTER USE
• Inspect and adjust every part of the chain saw.
- Completely clean every part and repair if
necessary.
- Apply thin coating of oil on metal parts to
prevent rust.
• Remove chain and guide bar.
• Drain fuel tank, pull starter slowly a few times
to drain fuel from carburetor.
• Pour a small amount of clean motor oil into
spark plug hole, pull starter and crank the
engine until piston reaches: TOP DEAD CENTER.
• Store in a dry area, free from dust.
Do not store in an enclosure where fuel
fumes may accumlate or reach an open ame
or spark.
Do not lend or rent your chain saw without
the operators manual and Safety manual.
NOTICE
• For future reference, you should keep this
operators manual and the Safety manual.
• If this operators manual or the Safety manual
has become illegible or is lost, please purchase
a new one from your ECHO dealer.
WARNING
CAUTION
TECHNICAL DATA
MODEL CS-2511T
Dimension L × W × H mm (in) 243 × 205 × 196 (9.57 × 8.07 × 7.72 )
Mass Power head, dry kg (lb) 2.3 (5.07) Without chain and guide bar
Engine Type Air-cooled two-stroke single cylinder
Displacement mL (in³) 25.0 (1.53)
Carburetor Diaphragm type
Magneto Flywheel magneto: CDI system
Spark plug NGK CMR7H
Starter Recoil starter
Power transmission Automatic centrifugal clutch
Fuel Mixture ratio 50:1 ratio with ECHO Power Blend X™ or ECHO
Red Armor® ISO-L-EGD (ISO/CD 13738) and JASO
M345-FD two-stroke, air-cooled engine oil.
Gasoline Use 89 octane unleaded.
Do not use fuel containing methyl alcohol, more than
10 % ethyl alcohol or 15 % MTBE.
Do not use alternative fuels such as E-15 or E-85.
Tank capacity L ( oz) 0.190 (6.42)
Oil Bar and chain ECHO bar and chain oil
Tank capacity L ( oz) 0.140 (4.73)
Guide bar and
saw chain
Engine speed Idle
Standard
features
Lubrication Adjustable automatic oil pump
Clutch engagement 4,100 - 4,600
Wide open throttle 12,200 - 13,400
RPM
See page 23 for Chain and Guide Bar Combination
2,800 - 3,600
Front hand guard, Anti-vibration device,
Throttle control lockout, Chain brake, Chain catcher,
Spark arrestor muer, (Kick guard),
(Spiked bumper; option)
* Technical data subject to change without notice.
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WARRANTY REGISTRATION SHEET
Thank you for choosing ECHO Power Equipment
Please go to http://www.echo-usa.com/Warranty/Register-Your-ECHO to register your new product on-line.
FAST and EASY! NOTE: your information will never be sold or misused by ECHO, Inc. Registering your purchase
enables us to contact you in the unlikely event of a service update or product recall, and veries your ownership
for warranty consideration.If you do not have access to the Internet, you can complete the form below and mail to:
ECHO Inc., Product Registration, PO Box 1139, Lake Zurich IL 60047.
It’s
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CS-2511T
C71915001001 C71915999999
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