CS-300
Chain Saw
Instruction Manual
MODELS : CS-300
Serial Number 03001001 - 03999999
CS-340
Serial Number 03001001 - 03999999
CS-345
Serial Number 03001001 - 03999999
X7503203102
WARNING
Read rules for safe operation and instructions carefully. ECHO provides an Instruction
Manual and a Safety Manual. Both must be read and understood for proper and safe
operation.
DANGER
X750003241
04/03
RULES FOR SAFE OPERATION
A. Kickback Safety Precaution for Chain Saw Users
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 .
Do not rely exclusively upon the safety devices built
into your saw. As a chain saw user , you should take
several steps to keep your cutting jobs free from
accident or injury .
1. With a basic understanding of kickback, you
can reduce or eliminate the element of surprise.
Sudden surprise contributes to accidents.
2. Keep a good firm grip on the saw with both
hands, the right hand on the rear handle, and
the left hand on the front handle, when the engine is running. Use a firm grip with thumbs and
fingers encircling the chain saw handles. A firm
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 specified by the manufacturer or the equivalent.
B. Other Safety Precautions
1. Do not operate a chain saw with one hand! Serious injury to the operator, helpers, byst anders, 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-fitting clothing; protective gloves; and eye, hearing and head protection devices.
Copyright© 2003 By Echo, Incorporated
All Rights Reserved.
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.
2
7. Keep all parts of your body away from the saw
chain when the engine is running.
14.Keep the handles dry, clean, and free of oil or
fuel mixture.
8. Before you start the engine, make sure that
the saw chain is not contacting anything.
9. Carry the chain saw with the engine stopped,
the guide bar and saw chain to the rear , and
the muffler away from your body .
10.Do not operate a chain saw that is damaged,
improperly adjusted, or not completely and
securely assembled. Be sure that the saw
chain stops moving when the throttle control
trigger is released.
11.Shut off the engine before setting the chain saw
down.
12.Use extreme caution when cutting small size
brush and saplings because slender material
may catch the saw chain and be whipped toward you or pull you off balance.
13.When cutting a limb that is under tension, be
alert for spring back so that you will not be
struck when the tension in the wood fibers is
released.
15.Operate the chain saw only in well-ventilated
areas.
16.Do not operate a chain saw in a tree unless
you have been specifically trained to do so.
17.All chain saw service, other than the items listed
in the Instruction Manual maintenance instructions, should be performed by competent chain
saw service personnel. (For example, if improper tools are used to remove the flywheel
or if an improper tool is used to hold the flywheel in order to remove the clutch, structural
damage to the flywheel could occur and could
subsequently cause the flywheel to burst.)
18.When transporting your chain saw, use the
appropriate guide bar scabbard.
19.Spark arrestor mufflers approved to SAE Standard J335b are Standard on ECHO Chain
saws to reduce the possibility of forest fires.
Do not operate the chain saw with a loose or
defective muffler . Do not remove the spark arrestor screen.
CONTENTS
Page
Rules for Safe Operation..................................................................................................2
T echnical Data .................................................................................................................4
Emission Data .................................................................................................................5
Description ...................................................................................................................... 5
Nomenclature of Parts......................................................................................................6
Preparation for Use..........................................................................................................7
Fuel and Lubricant............................................................................................................8
Operation......................................................................................................................... 9
Cutting Instructions ......................................................................................................... 11
Maintenance and Care................................................................................................... 15
Chain and Guide Bar Combinations............................................................................... 18
Setting the Saw Chain....................................................................................................18
Troubleshooting..............................................................................................................20
Storage.......................................................................................................................... 21
Correct Use of Chain Brake ...........................................................................................22
Servicing Information......................................................................................................24
3
TECHNICAL DATA
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4
EMISSION CONTROL
EPA Phase II
EMISSION DATA
The emission control system for these engines are
EM (Engine Modification).
An Emission Control Label is located on the
engine. (This is an EXAMPLE ONLY, information on
ENGINE FAMILY: 2EXHS.0334RA
DISPLACEMENT: 33.4 CC
THIS ENGINE MEETS U.S. EPA PAHSE II EMISSION REGULATIONS FOR S.O.R.E. REFER TO OWNER'S MANUAL FOR
MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS.
EMISSION COMPLIANCE PERIOD : 300 HRS.
IMPORTANT ENGINE INFORMATION
label varies by engine FAMILY).
PRODUCT EMISSION DURABILITY
The 300 hour emission durability compliance period is the time span selected by the manufacturer certifying
the engine emissions output meets applicable California and/or U.S. EPA emissions regulations, provided
that approved maintenance procedures are followed as listed in the Maintenance Section of this manual.
DESCRIPTION
The ECHO product you purchased has been factory pre-assembled for your convenience. Due to packaging
restrictions, guide bar and saw chain installation and other assembly may be necessary.
After opening the carton, check for damage. Immediately notify your retailer or ECHO Dealer of damaged or
missing parts. Use the contents list to check for missing parts.
CONTENTS
1 - Power Head
1 - Guide Bar
1 - Saw Chain
1 - Instruction Manual
1 - Safety Manual
1 - Warranty Registration Card
1 - Limited Warranty Statement
1 - Kick Guard Installation Manual
1 - Scrench
1 - Echo Power Blend TM 2-stroke oil sample
5
CS-300, CS-340
NOMENCLATURE OF P ARTS
19
1. Hand guard
(Chain brake actuating lever)
2. Throttle control lockout
3. Throttle control trigger
4. Sprocket guard
5. Chain catcher
18
CS-345
6. Air cleaner cover
7. Purge bulb
8. Guide bar
9. Saw chain
10. Front handle
11. On / Off switch
12. Rear hand guard
13. Fuel tank cap
14. Pull starter
15. Oil tank cap
16. Throttle control latch
17. Tip guard
18. Muffler
19. Lanyard ring
18
6
PREPARA TION FOR USE
The machine may be delivered with guide bar (A), tip
guard, and saw chain (B) separated. Install guide bar , tip
guard, and saw chain as follows:
A
W ARNING DANGER
Saw Chain is sharp! Always wear gloves when
handling assembly, otherwise serious personal injury
may result.
B
CAUTION
1. All adjustments should be made cold.
2. Always wear gloves when working on chain.
B
A
C
D
3. Do not operate with a loose chain.
GUIDE BAR AND SAW CHAIN
• Follow the instructions enclosed with tip guard to
install guard to guide bar .
• Remove two guide bar nuts and remove sprocket
guard (D).
• Mount guide bar (A) on studs, and slide toward
sprocket to make saw chain installation easier .
• Install saw chain (B) as shown, with cutters facing
forward.
IMPORTANT
Be certain tensioner (C) fits into lower adjuster hole
before tightening guide bar nuts.
NOTE
Move chain brake lever fully rearward to install
sprocket guard to saw.
• Install sprocket guard (D), and tighten guide bar nuts
finger tight.
• Adjust saw chain tension, as instructed in “Adjustment, Chain T ension.”
ADJUSTMENT, CHAIN TENSION
• Loosen two guide bar nuts.
• Turn the adjuster screw clockwise until the chain
touches the bottom of the bar.
UP
D
• Hold the bar nose up and tighten the chain until there
is no clearance between the bar and chain.
• Tighten both guide bar nuts with bar nose held up, to
eliminate clearance.
• Pull the saw chain around the guide bar by hand.
Loosen the adjustment, if you feel tight spots.
• Start the engine and run at low speed. Stop and
readjust, if necessary .
7
FUEL AND LUBRICANT
FUEL STATEMENT
GASOLINE - Use 89 Octane [R+M/2] (mid grade or higher)
gasoline or gasohol known to be good quality. Gasohol may
contain up to 10% Ethyl (grain) alcohol or 15% MTBE (methyl
tertiary-butyl ether). Gasohol containing methyl (wood) alcohol
is NOT approved.
TWO STROKE OIL - A two-stroke engine oil meeting ISO-LEGD (ISO/CD 13738) and J.A.S.O. FC Standards must be
used. Echo brand premium Power Blend TM Universal 2-Stroke
Oil meets these standards. Engine problems due to inadequate
lubrication caused by failure to use an ISO-L-EGD and J.A.S.O.
FC certified oil, such as Echo premium Power Blend TM, will void
the two-stroke engine warranty. (Emission related parts only
are covered for two years, regardless of two-stroke oil used, per
the statement listed in the Emission Defect Warranty Explanation.)
Mixing Instructions
1. Fill an approved fuel container with half of the required
amount of gasoline.
2. Add the proper amount of 2-stroke oil to gasoline.
3. Close container and shake to mix oil with gasoline.
4. Add remaining gasoline and remix.
5. Install fuel container cap and wipe any spilled fuel from
container and surrounding area.
Oil
50
Gasoline
Fuel Mix Chart
50:1
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SAGLIOSAGLIO
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1
2
5
6.2
1.5
8.21
4
8
02
08
061
004
IMPORTANT
Stored fuel ages. Do not mix more fuel than you expect to
use in thirty (30) days, ninety (90) days when a fuel stabilizer is added.
Stored two-stroke fuel may sep arate. AL WAYS shake fuel
container thoroughly before each use.
IMPORTANT
Spilled fuel is a leading cause of hydrocarbon emissions.
Some states may require the use of automatic fuel shutoff containers to reduce fuel spillage. Contact your ECHO
dealer for ordering information.
CHAIN LUBRICANT
Proper lubrication of the chain while in operation reduces friction
between the chain and the guide bar to a minimum and assures
a longer service life.
• use bar and chain oil of high quality for this purpose.
• Do not use used or reclaimed oil to avoid various oiler
problems.
• Use ECHO bar and chain oil.
• When ECHO bar and chain oil is not available:
Use motor oil, etc.
• Use bar and chain oil of the following grades:
SAE NO. 30 ..... in summer
SAE NO. 10 ..... in winter or when cutting resinous trees.
• When refueling, also refill chain oil.
T ANK INDICATION
FUEL T ANK OIL T ANK
8
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