Echo CS-330MX4 User Manual

Chain Saw

Instruction Manual

MODEL : CS-330MX4

X7503243100

W ARNING

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.

X750010720
06/07

RULES FOR SAFE OPERATION

A. Kickback Safety Precautions 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 .

The Kick Guard ® device is not installed on the
guide bar when you purchase your ECHO chain
saw. The Kick Guard ® can be used in a majority of
cutting operations, and is especially recommended
for beginners, homeowners, or chain saw novices.

Most cutting operations can be accomplished with
the Kick Guard® in place.

Do not rely exclusively upon the safety devices built
into your saw. As a chain saw user , you should take
several steps to keep your cutting jobs free from
accident or injury .

1. With a basic understanding of kickback, you
can reduce or eliminate the element of surprise.
Sudden surprise contributes to accidents.

2. Keep a good firm grip on the saw with both
hands, the right hand on the rear handle, and
the left hand on the front handle, when the 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, or the
equivalent, specified by the manufacturer.

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. Wear protective hair covering
to contain long hair .

Copyright© 2007 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.S park 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.

WARNING

• During operation, the muffler or catalytic muffler and surrounding cover become hot.

• Never suspend the saw on a lanyard with the engine running.

• Always use the saw from the right-hand side of your body – NEVER from the left side.

• Always wear proper safety clothing to protect your lower body from sharp saw chain and hot

muffler.

• Always keep exhaust area clear of flammable debris during transportation or when storing,
otherwise serious property damage or personal injury may result.

W ARNING

Moving parts can amputate fingers or cause severe injuries. Keep hands, clothing and loose objects away from
all openings.

• ALWAYS stop engine, disconnect spark plug, and make sure all moving parts have come to a complete stop
before removing obstructions, clearing debris, or servicing unit.

• DO NOT start or operate unit unless all guards and protective covers are properly assembled to unit.

• NEVER reach into any opening while the engine is running. Moving parts may not be visible through openings.

WARNING

Using improper replacement components or removing safety devices may result in serious or fatal injury .

3

CONTENTS

S

Page

Rules for Safe Operation..................................................................................................2

T echnical Data .................................................................................................................5

Emission Data .................................................................................................................6

Description ......................................................................................................................6

Nomenclature of Parts...................................................................................................... 7

Preparation for Use.......................................................................................................... 8

Fuel and Lubricant..........................................................................................................10

Operation....................................................................................................................... 12

- St arting Cold Engine ....................................................................................................12

- St arting Warm Engine .................................................................................................. 13

- Stopping ......................................................................................................................13

Cutting Instructions .........................................................................................................14

Maintenance and Care...................................................................................................17

Chain and Guide Bar Combinations...............................................................................22

Setting the Saw Chain.................................................................................................... 23

Troubleshooting..............................................................................................................24

Storage..........................................................................................................................24

Correct Use of Chain Brake ...........................................................................................26

Servicing Information...................................................................................................... 28

INTERNATIONAL SYMBOLS

Symbol form/shape Symbol description/application Symbol form/shape Symbol description/application

Chain oil fill

Chain oil pump

Chain oiler adjustmentChain brake operation

Carburetor adjustment

- Low speed mixture

Carburetor adjustment

- High speed mixture

Carburetor adjustment

- Idle speed

STOP

Read and understand
Operator's Manual.

Wear eyes, ears and head
protection

Emergency stop

Choke control “Cold Start”
position (choke closed)

Gasoline and oil mixture

Finger Sever

4

TECHNICAL DATA

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* Technical data subject to change without notice.

5

EMISSION DATA

EMISSION CONTROL

EPA Phase 2 / C.A.R.B. TIER III

The emission control system for the engine is EM/
TWC (Engine Modification and 3-way Catalyst) and for
the fuel tank the Control System is EVAP (Evaporative
Emissions). Evaporative emission may be applicable to
California models only.

ENGINE FAMILY: 7EXHS.0334KB DISPLACEMENT: 32.6 CC
EMISSION COMPLIANCE PERIOD : 300 HRS.
THIS ENGINE MEETS U.S. EPA PH2 EXH AND 2007 AND
LATER CALIFORNIA EXH AND EVAP EMISSION REGULA­TIONS FOR S.O.R.E. REFER TO OWNER'S MANUAL FOR
MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS.

An Emission Control Label is located on the

engine. (This is an EXAMPLE ONLY, information on
label varies by engine FAMILY).

PRODUCT EMISSION DURABILITY

The 300 hour emission durability compliance period is the time span selected by the manufacturer 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.

IMPORTANT ENGINE INFORMATION

DESCRIPTION

The ECHO product you purchased has been factory pre-assembled for your convenience. Due to packaging restrictions,
guide bar and saw chain installation and other assembly may be necessary.

After opening the carton, check for damage. Immediately notify your retailer or ECHO Dealer of damaged or missing
parts. Use the contents list to check for missing parts.

CONTENTS

1 - Power Head
1 - Guide Bar
1 - Kick Guard
1 - Hex Head Bolt
1 - Hex Nut
1 - Saw Chain
1 - Instruction Manual
1 - Safety Manual
1 - Warranty Registration Card
1 - Limited Warranty Statement
1 - T-Wrench
1 - Echo Power Blend X TM 2-stroke oil sample

Chain Saw

Instruction Manual

MODELS : CS-330MX4

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.

X7503243100

X750010720
06/07

6

CS-330MX4

P/N X503008690

P/N 89022839131

15

NOMENCLATURE OF PARTS

P/N X5240001710

10

P/N X524001970

11

P/N 89019130131

14

P/N X524001980

P/N 89016006361

13

P/N X503008690

12

P/N X505002060

9

8

7

1

2

4

3

5

6

1. Hand guard
(Chain brake actuating lever)

2. Ignition/Choke Lever

3. Throttle control trigger

4. Throttle control lockout

5. Air cleaner cover

6. Pull starter

7. Front handle

8. Oil tank cap

9. Fuel tank cap

10. Saw chain

11. Guide bar

12. Sprocket guard

13. Catalytic muffler

14. Spark Plug

15. Rear (Top) Handle
7

P/N 89022839131

P/N X505002060

P/N 89019130131P/N X503008690

P/N X503008690

P/N X524001710

GUIDE BAR* CHAIN*

PART NO. TYPE LINKS
12” 12AOED3745 OREGON 91VG 45
14” 14AOED3752 OREGON 91VG 52
16” 16AOED3757 OREGON 91VG 57

REPLACEMENT BAR AND CHAIN

Note:There may be other replacement

components for achieving
kickback protection. For details,
please refer to the chain and bar
combination sheet shown in the
instruction manual.

PREPARATION FOR USE

P/N X524001980

P/N X524001970

P/N 89016006361

* If a decal cannot be read, a new one can be ordered

from your ECHO dealer.

KICK GUARD® TO BAR INSTRUCTIONS

For saws with Kick Guard® P/N 2894901 and symmetri­cal or asymmetrical low-kick type guide bars.

1. Install bolt (A) in rear hole (B) of Kick Guard® and
through front hole (C) in guide bar.

2. IMPORTANT: Dimple in Kick Guard® (D) must engage
recess in guide bar (E).

3. Tighten nut (F) and bolt (A) until snug. Make certain Kick
Guard® is flush against guide bar.

8

GUIDE BAR AND SAW CHAIN-INSTALL/ REMOVE

G

WARNING

Saw Chain is sharp! Always wear gloves when handling
assembly, otherwise serious personal injury may result.

1. Move chain brake lever (G) fully rearward to unlock chain
brake.

IMPORTANT

Always loosen guide bar nuts before turning chain
tension adjuster, otherwise clutch cover and tensioner will

K

J

H

L

M

be damaged.

2. Remove two guide bar nuts (H). Turn tension adjustment
screw (J) counterclockwise 2 to 3 turns if bar and chain
are installed.

3. Push clutch cover (K) forward, pull rear of cover out
slightly , then remove.

N

4. Remove guide bar and saw chain if necessary .

NOTE: See “MAINTENANCE AND CARE” instructions
for guide bar, sprocket, and saw chain maintenance.

5. Mount guide bar (L) on studs, and slide toward sprocket
to make saw chain installation easier . Install saw chain
(M) over clutch and place around sprocket and guide
bar as shown, with cutters on top of guide bar facing
forward.

6. Align holes of clutch cover (K) with guide bar studs, and
tensioner pin (N) with lower guide bar adjuster hole.
Install cover , then press and hold rear of cover to fully
seat. Tighten guide bar nuts finger tight.

7. Turn saw over and check brake band (O) for correct

position around clutch drum (P). If brake band is not in
place around drum, remove clutch cover, make sure
brake is released, and reinstall.

DANGER

Never operate saw if chain brake does not function
properly, otherwise saw damage and serious
personal injury could result. See “Testing the
Brake” instructions.

8. Adjust saw chain tension, as instructed in “Adjustment,

P

O

Chain Tension”

9

ADJUSTMENT, CHAIN TENSION

IMPORTANT

Always loosen guide bar nuts before turning chain
tension adjuster, otherwise clutch cover and tensioner
will be damaged.

1. Remove air filter cover and spark plug lead.

2. Loosen two guide bar nuts (H).

3. Hold the bar nose up, and turn the adjuster screw (J)
clockwise until the chain touches the bottom of the
bar.

HJ

4. Tighten both guide bar nuts with bar nose held up.

IMPORTANT!

Tighten guide bar nuts to 90 – 110 kgf/cm (80 – 95 in.
lbs.) DO NOT over-tighten nuts. Damage to saw
may result.

5. Pull the saw chain around the guide bar by hand.
Reduce chain tension, if you feel tight spots.

NOTE

All chains require frequent adjustments.

6. Keep chain properly tensioned at all times.

7. Replace spark plug lead and air filter cover.

FUEL AND LUBRICANT

W ARNING

Moving parts can amputate fingers or cause severe injuries. Keep hands, clothing and loose objects away from all
openings. Always stop engine, disconnect sp ark plug, and make sure all moving parts have come to a complete
stop before removing obstructions, clearing debris, or servicing unit.

NOTICE: Use of unmixed, improperly mixed, or fuel older than 90 days, (stale fuel), may cause hard starting, poor
performance, or severe engine damage and void the product warranty. Read and follow instructions in the Storage
section of this manual.

FUEL STATEMENT

W ARNING

Alternative fuels, such as E-20 (20% ethanol), E-85 (85% ethanol) or any fuels not meeting ECHO requirements are
NOT approved for use in ECHO 2-stroke gasoline engines. Use of alternative fuels may cause performance prob­lems, loss of power, overheating, fuel vapor lock, and unintended machine operation, including, but not limited to,
improper clutch engagement. Alternative fuels may also cause premature deterioration of fuel lines, gaskets,
carburetors and other engine components.

10

Gasoline - Use 89 Octane [R+M/2] (mid grade or higher) gasoline known to be good quality. Gasoline may contain up to

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SAGLIOSAGLIO

.laG.zo.lFretiL.cc

1
2
5

6.2

2.5

8.21

4

8

02

08

061
004

10% Ethanol (grain alcohol) or 15% MTBE (methyl tertiary-butyl ether). Gasoline containing methanol (wood alcohol) is

NOT approved.
Two Stroke Oil - A two-stroke engine oil meeting ISO-L-EGD (ISO/CD 13738) and J.A.S.O. FC/FD Standards must be

used. Echo brand premium Power Blend XTM Universal 2-Stroke Oil meets 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. FC/FD certified oil, such as
Echo premium Power Blend XTM, 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.)

IMPORTANT

Echo premium Power Blend XTM Universal 2-Stroke Oil may be mixed at 50:1 ratio for application in all Echo engines
sold in the past regardless of ratio specified in those manuals.

Handling Fuel

Mixing Instructions

1. Fill an approved fuel container with half of the required

2. Add the proper amount of 2-stroke oil to gasoline.

3. Close container and shake to mix oil with gasoline.

4. Add remaining gasoline, close fuel container, and remix.

WARNING

Fuel is VERY flammable. Use extreme care when mixing, storing or handling or serious personal injury may result.

• Use an approved fuel container.

• DO NOT smoke near fuel.

• DO NOT allow flames or sparks near fuel.

• Fuel tanks/cans may be under pressure. Always loosen fuel caps slowly allowing pressure to equalize.

• NEVER refuel a unit when the engine is HOT or RUNNING!

• DO NOT fill fuel tanks indoors. ALWAYS fill fuel tanks outdoors over bare ground.

• DO NOT overfill fuel tank. Wipe up spills immediately.

• Securely tighten fuel tank cap and close fuel container after refueling.

• Inspect for fuel leakage. If fuel leakage is found, do not start or operate unit until leakage is repaired.

• Move at least 3m (10 ft.) from refueling location before starting the engine.

Fuel Mix Chart

50:1

amount of gasoline.

IMPORTANT

Spilled fuel is a leading cause of hydrocarbon emis­sions. Some states may require the use of automatic
fuel shut-off containers to reduce fuel spillage.

After use

• DO NOT store a unit with fuel in its tank. Leaks can occur.
Return unused fuel to an approved fuel storage container.

Storage - Fuel storage laws vary by locality. Contact your
local government for the laws affecting your area. As a
precaution, store fuel in an approved, airtight container. Store
in a well-ventilated, unoccupied building, away from sparks
and flames.

IMPORTANT

Stored fuel ages. Do not mix more fuel than
you expect to use in thirty (30) days, ninety
(90) days when a fuel stabilizer is added.

IMPORTANT

Stored two-stroke fuel may separate. AL­WAYS shake fuel container thoroughly before
each use.

11

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.

OPERATION

IMPORTANT

This saw features a combination ignition/choke switch that
automatically sets the throttle speed to fast idle for quick
starting. Do not squeeze trigger during cold starts until
after unit has started, or fast idle and choke settings will
be released, and engine may not start.

T ANK INDICATION

FUEL T ANK OIL T ANK

A

C

STARTING COLD ENGINE

WARNING

Make sure bar and chain are not touching anything when starting
the saw.

1. Move chain brake lever (E) fully forward to lock chain brake
before starting.

2. Fill the fuel tank with fuel. Do not over fill.

3. Fill the chain oil tank with lubricant. Do not over fill.

4. Move ignition/choke lever (A) forward to “close choke” ( )
position.

5. Lay unit on a flat, clear area and keep bar and chain clear of
all obstacles. Hold top handle with one hand, and depress
throttle trigger lockout (C), but do not depress throttle trigger
(D).

6. Pull starter handle (F) several times until engine starts, or first
starting sound is heard. (7 pulls maximum)

7. Move ignition/choke lever back to “run” ( I ) position (B). (Do
not move to “Stop” position [G].) If necessary, start the
engine.

B

C

C

E

NOTE

If engine does not start after 3 pulls with choke in “run” ( I )
position, repeat cold start instructions 4-6.

D

F

12

8. After engine starts, wait 5 seconds then depress and release
throttle trigger (D). Allow unit to warm up at idle for several
minutes.

NOTE

Do not pull starter rope out to the maximum possible position.
Do not allow recoil handle to snap back against the casing.

STARTING WARM ENGINE

1. Ensure that there is fuel and chain oil in the tanks.

2. Move chain brake lever (E) fully forward to lock chain brake
before starting.

3. Lay unit on a flat, clear area and keep bar and chain clear of all
obstacles.Hold top handle with one hand, and depress throttle
trigger lockout, but do not depress throttle trigger.

4. Move ignition/choke lever (A) forward to “Run” position ( I ).

5. Pull starter handle.

E

G

C

E

A

C

NOTE

If engine does not start after 5 pulls, use cold start procedure.

RUNNING

WARNING

The saw chain should not move at idle, otherwise serious personal
injury may result.

NOTE

If saw chain moves, adjust carburetor according to “Carburetor
Adjustment” instructions in this manual, or see your dealer.

• After engine starts, allow it to return to idle and warm up before

using.

• Move chain brake lever fully rearward to unlock chain brake.

• Press throttle control lockout then gradually squeeze throttle

trigger to increase engine speed.

• Saw chain starts moving when the engine reaches approximately

4200 rpm.

• Ensure proper acceleration and lubrication of chain and bar.

• Do not run the engine at high speed unnecessarily.

• Be sure that saw chain stops moving when throttle trigger is

released.

A

D

13

STOPPING

E

1. Release throttle trigger (D) and move lever (A) rearward to STOP
(O) position.

2. Move chain brake lever (E) fully forward to lock chain brake.

NOTE

If engine does not stop, move ignition/choke lever forward to
choke position (

authorized ECHO dealer to check and repair stop switch before
starting the engine again.

) to stop engine. Return the unit to your

CUTTING INSTRUCTIONS

GENERAL

WARNING

Read the ECHO “CHAIN SAW SAFETY MANUAL” included
with your chain saw for additional cutting and safety instruc­tions. Failure to obey all instructions may result in serious or
fatal injuries.

In all circumstances the operation of the chain saw is a one­man job. It is difficult at times to take care for your own safety,
so don’t assume the responsibility for a helper as well. Af ter
you have learned the basic techniques of using the saw, your
best aid will be your own good common sense...

A

D

The accepted way to hold the saw is to stand to the left of the
saw with your left hand on the front handlebar and your right
hand on the rear handle so you can operate the throttle trigger
with your right index finger.

Before attempting to fell a tree, cut some small logs or limbs.
Become thoroughly familiar with the controls and the re­sponses of the saw.

St art the engine, see that it is running properly . Squeeze the
trigger to open the throttle wide open and start the cut. If the
chain is properly sharpened, the cutting should be relatively
effortless. It is not necessary to press down hard to make the
saw cut. Pushing the saw too hard will slow the engine and
cutting will actually be more difficult.

NOTE

Some material may adversely affect the housings of your
ECHO chain saw.

(Example: Palm Tree Acid, fertilizer , etc.) To avoid housing
deterioration, carefully remove all packed saw dust around
clutch and guide bar area and wash with water. Coat met al
parts with light oil.

14

FELLING A TREE

Kickback

WARNING

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. A void it!

DIRECTION

OF FALL

Direction of fall

First cut

Notch

Second cut

One-third tree

diameter

2”

45°

Hinge

Felling cut

2”

WARNING

A falling tree can seriously damage anything it may hit - a
car, a house, a fence, a power line, or another tree. There are
ways to make a tree fall where you want it, so first decide
where that is!

Before cutting, clear the area around the tree. Y ou 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 3m from the trunk to avoid
the trunk kicking back over the stump.

Begin the cut on the side to which the tree is to fall. Cut a notch
about 1/3 of the way into the tree as shown. The position of this
notch is important since the tree will try to fall “into” the notch.
The felling cut is made on the side opposite the notch and at a
level about 2” above the bottom of the notch. Do not try to cut
through to the notch with the felling cut. The remaining wood be­tween the notch cut and felling cut (about 2”) will act as a hinge
when the tree falls, guiding it in the desired direction. When the
tree starts to fall, kill the engine, place the saw on the ground and
make your retreat quickly .

To fell big trees with a diameter exceeding twice the bar length,
start the notching cuts from one side and draw the saw through to
the other side of the notch. Start the back cut on one side of the
tree, pivoting the saw through to form the desired hinge on that
side.

Then remove the saw for the second cut. Insert the saw in the first
cut, very carefully so as not to cause kickback. The final cut is
made by drawing the saw forward in the cut to reach the hinge.

15

LIMBING

Limbing a fallen tree is much the same as bucking. Never
limb on the tree that you are standing. 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 the bar in a vertical posi­tion. If the saw should kick back you may not have good
enough control to prevent possible injury .

Uphill position

BUCKING

FIRST CUT

FINISH CUT

Board or flat stones

Bucking is the sawing of a log or fallen tree into smaller
pieces. There are a few basic rules which apply to all
bucking operations.

Keep both hands on the handles at all times.
Support logs if possible.
When cutting on a slope or hillside, always stand uphill.

Keep in mind that the wood is heavy and that it will bend
and pinch the saw if improperly supported.

The trunk will weaken at the point where you make the cut
unless the tree is lying on perfectly flat ground or supported
as shown.

If you make the cut with the tree on the ground, don’t let the
saw’s chain dig into the earth; it is harmful for the saw , and
you stand a good chance of being struck by flying debris. T o
cut the trunk, use the bucking and two-cut sequence shown.
The first cut should be no deeper than one-third the trunk
diameter.

16

KICKBACK

• Improper thrust cutting.

WARNING

KICKBACK IS DANGEROUS

Kickback is generated when the rotation of the chain is
arrested for some reason. The most dangerous effect of
this action occurs when the nose of the bar contacts
another object, the chain is momentarily stopped and all
the energy of the engine throws the bar upwards and 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.

• When the bar nose hits another tree, etc.

Comply with the Safety Precautions as listed on page 2
and 3 of this manual.

MAINTENANCE AND CARE

W ARNING

Moving parts can amputate fingers or cause severe injuries. Keep hands, clothing and loose objects away from all
openings. Always stop engine, disconnect sp ark plug, and make sure all moving parts have come to a complete
stop before removing obstructions, clearing debris, or servicing unit.

Your ECHO unit is designed to provide many hours of trouble free service. Regular scheduled maintenance will help your
unit achieve that goal. If you are unsure or are not equipped with the necessary tools, you may want to take your unit to
an ECHO Service Dealer for maintenance. To help you decide whether you want to DO-IT-YOURSELF or have the
ECHO Dealer do it, each maintenance task has been graded. If the task is not listed see your Echo dealer for repairs.

SKILL LEVELS

Level 1 = Easy to do. Most required tools come with unit.
Level 2 = Moderate difficulty. Some specialized tools may be required.
Level 3 = Experience required. Specialized tools are required. ECHO recommends

that the unit be returned to your ECHO dealer for servicing.

ECHO offers REPOWERTM Maintenance Kits and Parts to make your maintenance job easier. Just below each task
heading are listed the various part numbers required for that task. See your ECHO dealer for these parts.

17

MAINTENANCE INTERVALS

/TNENOPMOC

METSYS

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AIR FILTER

1. Close choke (Cold Start Position [ ]). This prevents dirt from
entering the carburetor throat when the air filter is removed.

Brush accumulated dirt from air cleaner area.

2. Remove air filter cover. Brush dirt from inside cover.

3. Remove air filter and lightly brush debris from filter. Replace filter
if it is damaged, fuel soaked, very dirty, or deformed.

4. Install air filter cover.

AUTOMA TIC OILER

• The discharge volume of the automatic oiler is adjusted to 6 to 7 cc/
min (@ 7000 rpm) prior to shipment from the factory.

• Always check oil discharge when in use.

• Turn adjusting screw (D) counter-clockwise to increase oil volume,
clockwise to decrease oil volume.

udraewroegamadfognidnifehtnodesaberaecalperotsnoitadnemmocerllA

D

18

OIL STRAINER

• Check periodically.

1. Do not allow dust to enter oil tank.

2. Clogged oil strainer will affect the normal lubricating system

3. Using a wire bent into the shape of a hook, pull strainer out
through oil port and inspect strainer.

4. If the strainer is dirty, clean with suitable cleaning fluid.

5. If the inside of the oil tank is dirty, rinse with suitable cleaning
fluid.

FUEL STRAINER

1. Do not allow dust to enter fuel tank.

2. Clogged strainer will cause difficulty in starting engine or
abnormalities in engine performance.

3. Using a wire bent into the shape of a hook, pull strainer out
through gas port, and inspect strainer.

4. If the strainer is dirty, clean with suitable cleaning fluid.

5. If the inside of the tank is dirty, rinse with suitable cleaning
fluid.

GUIDE BARS AND OIL HOLES

• Follow instructions for “Guide Bar and Saw Chain – Install/Re­move” .

• Clean after each use

- Clean the grooves (A) of the guide bar with a small screwdriver.

- Clean oil holes (B) with a wire.

NOTE: Symmetrical shaped Guide Bars should be inverted
each time the chain is removed to extend guide bar life.

SPROCKET

• A damaged sprocket (C) will cause premature damage or wear of

saw chain.

• Clean sprocket, clutch and bar mount area before installation of

bar.

• Check sprocket when you install new chain. When outer diameter

of sprocket is worn 0.5mm (.020”) or more, replace it.

IMPORTANT

Some tree sap and resins are corrosive. Thoroughly wash the guide
bar and sprocket areas after each use, then coat metal parts with
light oil.

A

B

C

Worn : 0.5 mm

C

19

SPARK PLUG

• Check periodically.

IMPORTANT

Use only NGK BPM-8Y spark plug (BPMR-8Y in Canada) otherwise
severe engine damage may occur.

1. Remove air cleaner cover.

2. Remove spark plug lead and spark plug.

3. Gap = 0.65 mm (0.026 in)

4. Replace if electrode is worn, or if the insulator is fouled by oil or other
deposits

5. Torque = 150 – 170 kg/cm (130 – 150 in. lb.)

IMPORTANT

Do not over-torque

COOLING SYSTEM CLEANING

NOTE

See “Guide Bar and Saw Chain-Install/Remove Instructions for
sprocket guard removal/replacement instructions.

Muffler Side

1. Remove air filter cover and remove spark plug lead.

2. Remove two guide bar nuts and remove sprocket guard.

3. Remove three muffler cover screws and remove muffler cover.

4. Using a stiff bristle cleaning brush (do not use a metal brush), remove
debris from cylinder fins in muffler area.

5. Assemble components in reverse order

Starter Side

1. Remove air filter cover and remove spark plug lead.

2. Remove plastic plug in side handle mount (D), and remove side
handle mounting screw.

3. Remove four starter cover screws and remove starter cover.

4. Using a stiff bristle cleaning brush (do not use a metal brush), remove
debris from flywheel and ignition coil area.

5. Assemble components in reverse order.

MUFFLER SPARK ARRESTOR

IMPORTANT

Carbon deposits in muffler will cause a drop in engine output and
overheating. Spark arrestor screen must be checked periodically.

1. Remove air filter cover and remove spark plug lead.

2. Remove two guide bar nuts and remove sprocket guard.

3. Remove three muffler cover screws and remove muffler cover.

4. Remove spark arrestor screen cover, gaskets, and screen from
muffler body.

5. Clean carbon deposits from muffler components.

NOTE

When cleaning carbon deposit, be careful not to damage the catalytic
element inside muffler.

D

6. Replace screen if it is cracked, plugged, or has holes burned
through.

7. Assemble components in reverse order.

20

Cylinder Exhaust Port

IMPORTANT

The cylinder exhaust port must be inspected and cleaned
of excess carbon every 3 months or 90 hours of operation
in order to maintain this engine within the emissions
durability period. ECHO strongly recommends that you
return your unit to your ECHO dealer for this important
maintenance service.

CARBURETOR ADJUSTMENT

Engine Break-In

New engines must be operated a minimum duration of two tanks of
fuel break-in before carburetor adjustments can be made. During the
break-in period your engine performance will increase and exhaust
emissions will stabilize. Idle speed can be adjusted as required.

High Altitude Operation

This engine has been factory adjusted to maintain satisfactory
starting, emission, and durability performance up to 1,000 feet above
mean sea level (MSL). To maintain proper engine operation above
1,000 feet MSL the carburetor must be adjusted by an authorized
ECHO service dealer.

IMPORTANT

If the engine is adjusted for operation above 1,000 feet MSL, the
carburetor must be re-adjusted when operating the engine below
1,000 feet MSL, otherwise severe engine damage can result.

BEFORE MAKING ADJUSTMENTS:

• The correct spark plug must be clean and properly gapped.

• The air filter element must be clean and properly installed.

• The muffler spark arrestor screen and exhaust port must be clear
of carbon.

• The standard bar and chain combination (see page 4) must be
installed to the power head, and properly tensioned.

LOW ALTITUDE ADJUSTMENT

Engines that have been adjusted to operate at high altitudes must be
readjusted to operate properly at altitudes below 2000 feet.

1. Start engine and run for several minutes to reach operating
temperature.

2. Stop engine.

3. Start engine and turn the high-speed needle (A) rich (CCW) until
the engine runs between 13,500 and 14,500 RPM. Then turn the
low-speed needle (B) rich (CCW) until the engine does not
hesitate when accelerated.

DO NOT REMOVE LIMITER CAPS!

4. Idle Speed Adjustment.

• Turn “idle” speed adjustment screw (C) CW until the saw chain
begins to move, then turn the screw CCW until saw chain stops
moving. Turn screw CCW an additional 1/4 turn.

C

A
B

5. Accelerate to full throttle for 2-3 seconds to
clear excess fuel from engine then return to
idle. Accelerate to full throttle to check for
smooth transition from idle to full throttle. If
engine stops or stalls after full warm up
return the unit to your authorized ECHO
dealer for adjustment.

21

HIGH ALTITUDE ADJUSTMENT

High altitude adjustment may be required for proper operation of this engine
above 2000 feet.

1. Start engine and run for several minutes to reach operating temperature.

2. Stop engine.

3. Start engine and turn the HI speed needle (A) lean (CW) until the engine
runs between 13,500 and 14,500 RPM. Then turn the LO speed needle
lean (B) (CW) until the engine does not hesitate when accelerated.

DO NOT REMOVE LIMITER CAPS!

4. Idle Speed Adjustment.

• Turn “idle” speed adjustment screw (C) CW until the saw chain begins
to move, then turn the screw CCW until saw chain stops moving. Turn
screw CCW an additional 1/4 turn.

5. Accelerate to full throttle for 2-3 seconds to clear excess fuel from
engine then return to idle. Accelerate to full throttle to check for smooth
transition from idle to full throttle. If engine stops or stalls after full warm
up return the unit to your authorized ECHO dealer for adjustment.

CHAIN AND GUIDE BAR COMBINATIONS

The following combinations may be used on CS-330MX4

LO HI

KCABKCIKWOL

LEDOM

4XM033-SC

RAB

HTGNEL

"21
"41
"61

RABDRAUG

N/PRAB

5473DE0A21
2573DE0A41
7573DE0A61

NIAHC

.ONTRAP

54-GV19
25-GV19
75-GV19

SKNILEPYTHCTIPEGUAG

54
25
75

GV19"8/3050.

NIAHCWASKCABKCIKWOL

*Reduced nose radius symmetrical bars (OREGON name — Double Guard)

WARNING

Use of replacement saw chain and/or guide bar other than that specified, or operation without the “tip guard” in place, may
cause severe kickback resulting in serious injury.

Only use saw chain designated as, “LOW-KICKBACK,” that meets the ANSI B175.1-2000 Standard when tested on the
representative sample of chain saws below 3.8 C.I.P. specified, and the Echo guide bar specified.

IMPORTANT
Chain and guide bar gauge size must be identical. Use Bar/Chain combinations shown in table
above.

KCIK

DRAUG

N/POHCE

)N/PMEO(

1094982

94982

IMPORTANT
If your kick guard is damaged or lost, contact your Echo dealer for a replacement. For the name
of the Echo dealer nearest you, Call: 1-800-432-ECHO (3246) or on the web at www.echo­usa.com.

Refer to your Chain Saw Safety Manual for kick guard application information.

22

SETTING THE SAW CHAIN

For setting saw chains, round file (4 mm ø: 5/32”) and flat file are used.

• To keep correct position and correct angle, use the file holder .

- Round file and flat file are available from your Echo Dealer.

• File cutters as below .
T o sharpen other type chain, follow chain manufacturer’s instructions

T ype : 91VG

Keep this angle

PUSH FILE AS SHOWN

30°

90°

HOLD FILE HOLDER

LEVEL

1/5

ONE FIFTH OF FILE DIAMETER

REMAINS ABOVE CUTTER EDGE

Depth

gauge

• Place the depth gauge tool firmly on guide bar so that depth gauge protrudes. Then file top of depth gauge with flat file
until flat with top of the gauge tool.

- Be sure to round off the front edge of the depth gauge.

Depth gauge

tool

Remove
until flat

with tool

Round
off the

edge

• Properly filed cutters are shown below .

(Top plate angle) (Side plate angle) (Top plate cutting angle) (Depth gauge)

0.64 mm (0.025 in.)

Parallel

30°

80°

60°

• When setting of the chain is finished, soak it in oil and wash away filings completely before using.

• When chain has been filed on the bar , supply sufficient oil to it, rot ate the chain slowly to wash away the filings before
using again.

• If the chain saw is operated with filings clogged in the groove, the saw chain and the guide bar will be damaged
prematurely

• If the saw chain becomes soiled with resin, for instance, clean it with kerosene and soak it in oil.

(SPROCKET)

CHAIN TYPE AND SPROCKET PITCH

Saw chain should be used with corresponding pitched
sprocket. To identify chain type and pitch of sprocket,
check as follows.

• Chain type number (A) is stamped on drive link.

• S procket pitch (B) is st amped on clutch drum.

Number

indicates Chain

type

(DRIVE LINK)

91

A

3/8A

Sprocket

Pitch

B

23

TROUBLESHOOTING

Poor performance of the engine and/or cutting mechanism can normally be prevented by carefully following these
instructions.
Poor performance can easily be corrected even by a beginner.
When the engine does not function properly check the following three (3) points first.

• Is the engine compression adequate?

• Is fuel system in good condition and is enough fuel being supplied?

• Is electrical system in good condition and is spark plug operating normally?
When there is serious trouble with the unit, do not try to repair it yourself but have your distributor or dealer do it for you.
For detailed TROUBLESHOOTING refer to tables 1 and 2. Locate the problem on the following charts and repair as
necessary.

Table 1

Engine cranks

There is fuel in the tank

Engine does not start (or, is difficult to start)

Fuel is reaching cylinder

Fuel is reaching carburetor

Fuel is not
reaching carburetor

Fuel is not reaching
cylinder

There is spark at high

tension cord end

○○○○○

○○○○○○

No spark at high tension
cord end.

No spark at plug

Fuel does not
keep running

○○○

○○

○○○

Fuel strainer clogged ................................... Clean.

Fuel pipe clogged ........................................Clean.

Suction insufficient .......................................Make sufficient.

Strainer clogged .......................................... Clean.

Carburetor out of order ................................. Disassemble and check.

C.D.I. module defective ................................. Remove and replace.

Ignition coil defective ....................................Remove and replace.

Wire connection defective ............................. Reconnect.

High-tension cord connection defective ......... Repair as necessary.

Switch is grounded ....................................... Switch on.

Insulator cracked ..........................................Replace plug.

Spark gap incorrect ...................................... Adjust.

Covered with carbon ..................................... Clean or replace.

Fouled with fuel ............................................ Clean or replace.

Starting procedures incorrect ....................... Start correctly .

Low and high speed needle ...........................Readjust.

setting too lean

Metering lever spring too strong .................. Readjust.

Fuel p ump d iap hrag m def ecti ve.....................Replace.

There is spark at plug

Starting procedures

correct

Engine does
not crank

Acceleration
and low speed
function
defective

Carburetor
overflow

○○○○○

24

○○○

○○○

Fuel passage clogged with dust ...................Disassemble and clean.

Fuel leaking from fixing surfaces .................. Retighten all screws.

of carburetor
Air valve, fuel tank cap does not

work normally ............................................... Replace or Clean.

Fuel pump does not operate ..........................Check impulse drilling.

Fuel inlet needle valve clogged with dust .......Clean.

Metering lever spring not placed

in dent of lever ..............................................Correct.

Muffle r stic ky wi th fuel ................................... Fuel mixture is too rich

Bearing damaged .........................................Disassemble and replace.

Piston and/or cylinder seized ........................ Disassemble and replace.

Crankshaft worn ........................................... Disassemble and replace.

Crankshaft contacting crankcase .................. Disassemble and replace.

Start the engine several times
with choke rod fully open and
run at fast idle until engine

does not smoke.

Table 2

Engine
overheated

Improper fuel used ........................................ Use fuel with correct mixing ratio. Never use

gasoline of poor quality.

Spark plug defective (worn)...........................Replace.

As cooling fins clogged, air

does not pass well ........................................Clean fins.

Excessive deposits in

combustion chamber .....................................Disa ssem ble and r emov e car bon.

Firing function
defective

Carburetor

Ouput (engine speed) insufficient

Engine keeps running, but chain does not cut clean

defective

Other
troubles

Chain does not cut
clean

Chain stops
(Clutch slips)

Plug damaged or fouled................................Replace or clean.

Combustion poor due to

defective wiring ............................................Check wiring.

High-speed needle setting incorrect ............. Readjust.

Carburetor overflow ...................................... Refer to Table 1.

Air cleaner clogged ..................................... Clean as necessary.

Compression insufficient

(piston ring stuck or worn out) ...................... Disassemble, check and replace if necessary.

Cylinder chromium plating peeled ................. Replace cylinder

or worn out

Exhaust port clogged with carbon ................. Clean as necessary.

Throttle is not fully open ................................ Readjust.

Chain tension incorrect ................................ Adjust.

Chain wrongly set .........................................Set correctly.

Depth incorrect ............................................Readjust.

Chain saw pressed against

tree to firmly .................................................Press lightly.

Clutch shoe worn out ....................................Replace.

No oil in tank ................................................ Refill.

Output (engine speed) sufficient

DANGER

Chain poorly
lubricated

Oil delivery incorrect.....................................Adjust.

Oil contaminated with dust ............................ Rinse tank and fill with new oil..

Oil viscosity inappropriate ............................. Use oil with correct viscosity for summer or winter.

Fuel vapors are extremely flammable and may cause fire and/or explosion. Never test for ignition spark by ground­ing spark plug near cylinder plug hole, otherwise serious personal injury may result.

25

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 corrosion.

• Drain fuel tank, pull starter slowly a few times to drain fuel from carburetor.

• Pour a small amount of clean two-stroke oil into spark plug hole, pull starter 2 to 3 times, then leave the piston at TOP DEAD
CENTER.

• Store in a dry area, free from dust.

CORRECT USE OF CHAIN BRAKE

The installation of a chain brake may be mandatory by law or as stipulated by insurance regulations in your area of
operation. Y ou should inquire through local government offices, 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.

USA: ANSI Standard B175.1-2000 Safety Requirement for chain saws
Canada: CSA S t andard Z 62.1 CHAIN SA WS

WARNING

ANSI Standard B175.1-2000 stipulates that the brake shall stop the chain in 0.15 seconds maximum (.12 sec avg)
at full throttle. 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 S tandard B175.1-2000.

Kickback Motion:

• When the bar nose hits another tree, etc.

Function:

• When the lever is pushed forward, chain brake
instantly works to stop the chain.

Release:

• Improper thrust cutting.

• When the lever is fully pulled toward the operator, brake is
released.

26

INSTALLATION

• Echo recommends that the chain brake should be
serviced by an authorized Echo servicing dealer.

OPERATION

• Set the lever in the released position before starting to
cut.

• If the brake is tripped by kick back 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
engaged.

TESTING THE BRAKE

• Start the engine on a solid level surface and run at a fast
idle until warm.

• Hold the saw firmly by the handles and accelerate the
engine to a fast idle.

• Slowly operate the chain brake lever while holding the saw
firmly on the ground. When the brake lever trips, the chain
should stop. Immediately release the throttle trigger.

IMPORTANT

Do not allow the saw to tip forward in order to avoid
damage to the chain.

If the chain does not stop, immediately return the saw to your
authorized Echo dealer for repair.

SERVICING INFORMATION

PARTS

Genuine ECHO Parts and ECHO REPOWER™ Parts and Assemblies for
your ECHO products are available only from an Authorized ECHO
Dealer. When you do need to buy parts always have the Model Number
and Serial Number of the unit with you. You can find these numbers on
the engine housing. For future reference, write them in the space
provided below.

/SERIAL NUMBER

Model Number _____________ Serial Number ____________

SERVICE

An Authorized ECHO Service Dealer must perform Service of this
product during the warranty period. For the name and address of the
Authorized ECHO Service Dealer nearest you, ask your retailer or call: 1­800-432-ECHO (3246). Dealer information is also available on our Web
Site. When presenting your unit for Warranty service/repairs, proof of
purchase is required.

ECHO CONSUMER PRODUCT SUPPORT

If you require assistance or have questions concerning the application,
operation or maintenance of this product you may call the ECHO
Consumer Product Support Department at 1-800-673-1558 from 8:30 am
to 4:30 pm (Central Standard Time) Monday through Friday. Before
calling, please know the model and serial number of your unit to help
your Consumer Product Support Representative.

WARRANTY REGISTRATION

To ensure trouble free warranty coverage it is important that you
register your ECHO equipment on-line at www.echo-usa.com. Other
registration options are by automated phone at 1-800-432-3246 or by
filling out the warranty registration card supplied with your unit.
Registering your product confirms your warranty coverage and
provides a direct link between you and ECHO if we find it necessary to
contact you.

DEALER? Call

1-800-432-ECHO

1-800-432-3246

or

www.echo-usa.com

CONSUMER PRODUCT

SUPPORT

1-800-673-1558

8:30 - 4:30 Mon - Fri C.S.T.

ADDITIONAL OR REPLACEMENT MANUALS

Safety Manuals in English/Spanish or English/French are available, free of charge, from your ECHO dealer or at
www.echo-usa.com.
Instruction and Parts Manuals are available by:

• Downloading free from www.echo-usa.com

• Purchasing from your Echo Dealer.

• Manuals are available by sending a written request stating the model number and serial number of your Echo
unit, part number of the manual, your name and address, and mail to the address below.

Safety Videos are available from your Echo dealer. A $5.00 shipping charge will be required for each video.

ECHO, INCORPORATED

400 OAKWOOD ROAD

LAKE ZURICH, IL 60047-1564

www.echo-usa.com

C07311001001/C07311999999