Echo CS-330MX4 User manual

X7503243102 X750010722
11/09
WARNING
Read rules for safe operation and instructions carefully. ECHO provides an Instruc-
tion Manual and a Safety Manual. Both must be read and understood for proper and
safe operation.
Chain Saw
Instruction Manual
MODEL : CS-330MX4

2
Rules foR safe opeRation
A. Kickback Safety Precautions for Chain Saw Users
B. Other Safety Precautions
1. Do not operate a chain saw with one hand! Serious
injury to the operator, helpers, bystanders, or any com-
bination 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; protective
gloves; and eye, hearing and head protection devices.
Keep long hair away from engine and air intake. Retain
hair with cap or net.
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 by-
standers 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.
Copyright© 2010 By Echo, Incorporated
All Rights Reserved.
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 ac-
complished 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 in-
jury.
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, or the equiva-
lent, specied by the manufacturer.
7. Keep all parts of your body away from the saw chain
when the engine is running.
8. Before you start the engine, make sure that the saw
chain is not contacting anything.
9. Carry the chain saw with the engine stopped, the guide
bar and saw chain to the rear, and the mufer away
from your body.
10. Do not operate a chain saw that is damaged, im-
properly 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 bers is released.

3
14. Keep the handles dry, clean, and free of oil or fuel
mixture.
15. Operate the chain saw only in well-ventilated areas.
16. Do not operate a chain saw in a tree unless you have
been specically trained to do so.
17. All chain saw service, other than 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 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 appropri-
ate guide bar scabbard.
19. Spark arrestor mufers approved to SAE Standard
J335b are Standard on ECHO Chain saws to reduce
the possibility of forest res. Do not operate the chain
saw with a loose or defective mufer. Do not remove
the spark arrestor screen.
WARNING
Using improper replacement components or removing safety devices may result in serious or fatal injury.
WARNING
• During operation, the mufer or catalytic mufer and surrounding cover become hot.
• Never suspend the saw on a lanyard with the engine running.
• Always use the saw from the right-hand side of your body – NEVER from the left side.
• Always wear proper safety clothing to protect your lower body from sharp saw chain and
hot mufer.
• Always keep exhaust area clear of ammable debris during transportation or when storing,
otherwise serious property damage or personal injury may result.
WARNING
Moving parts can amputate ngers 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
Check fuel system for leaks due to fuel tank damage, especially if the unit is dropped. If damage or leaks are found, do not use
unit, otherwise serious personal injury or property damage may occur. Have unit repaired by an authorized servicing dealer
before using.

4
inteRnational symbols
Contents
Page
Rules for Safe Operation..................................................................................................2
Technical Data..................................................................................................................5
Emission Data ..................................................................................................................6
Description........................................................................................................................6
Nomenclature of Parts......................................................................................................7
Preparation for Use ..........................................................................................................8
Fuel and Lubricant..........................................................................................................10
Operation........................................................................................................................12
- Starting Cold Engine ....................................................................................................13
- Starting Warm Engine ..................................................................................................14
- Stopping .......................................................................................................................14
Cutting Instructions.........................................................................................................15
Maintenance and Care ...................................................................................................18
Chain and Guide Bar Combinations...............................................................................24
Troubleshooting..............................................................................................................26
Storage...........................................................................................................................27
Correct Use of Chain Brake............................................................................................27
Warranty Statements......................................................................................................29
Servicing Information......................................................................................................32

5
teChniCal Data
* Technical data subject to change without notice.
Model ......................................................................................................... CS-330MX4
Dimension.................................. L x W x H .............................mm ............ 277 x 247 x 214
inch............ 10.9 x 9.7 x 8.4
Weight ....................................... Power head, dry ..................kg............... 3.6 (7.9 lb)
Without chain and guide bar
Engine ....................................... Type........................................................ Air-cooled, two-stroke, single cylinder
Displacement.......................................... 32.6 (1.989 cu.in.)
Carburetor............................................... Diaphragm type
Ignition .................................................... Flywheel magneto : CDI system
Spark Plug .............................................. NGK BPM-8Y - .065 mm (.026 in.) Gap
Starter..................................................... Recoil starter
Power transmission ................................ Automatic centrifugal clutch
Fuel............................................Mixture ratio............................................. 50:1 ratio with Echo Power BlendTM 2-stroke
oil. 89 octane unleaded. Do not use fuel
containing methyl alcohol, more than 10%
ethyl alcohol or 15% MTBE. 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 ......................ml............... 310 (10.5 U.S.  oz.)
Oil .............................................. Bar and chain ......................................... ECHO bar and chain oil (or motor oil)
Tank Capacity ......................ml............... 290 (9.8 U.S.  oz.)
Lubrication .............................................. Adjustable automatic oil pump
Guide bar .................................. Standard ................................................. 14 in.
Saw chain.................................. Optional .................................................. 12, 16 in.
Standard features....................................................................................... Top Handle
Front hand guard
Anti-vibration device
Throttle control lockout
Chain catcher
Spark arrestor - catalytic mufer / mufer
Engine RPM .............................. Idle.......................................................... 2,400 - 2,800
Clutch Engagement ................................ 4,300
Wide Open Throttle (WOT)..................... 13,000 - 14,000
Kickback Safety Features.......................................................................... Double Guard Low Kick Guide Bar
Low Kick Guard Link Saw Chain
Front Hand Guard/Chain Brake Lever
Chain Brake
Kick Guard

6
DesCRiption
The ECHO product you purchased has been factory pre-assembled for your convenience. Due to packaging restric-
tions, 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 - T-Wrench
1 - Echo Power Blend X TM 2-stroke oil sample
emission Data
An Emission Control Label is located on the en-
gine. (This is an EXAMPLE ONLY, information on
label varies by engine FAMILY).
X7503243100 X750010720
06/07
WARNING
Readrules forsafeoperation andinstructionscarefully. ECHOprovides anInstruction
Manualand a Safety Manual. Both must be read and understood for proper and safe
operation.
Chain Saw
Instruction Manual
MODELS : CS-330MX4
PRODUCT EMISSION DURABILITY (EMISSION COMPLIANCE PERIOD)
The 300 hour 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 (exhaust &evapoRative)
EPA 2010 and Later and/or C.A.R.B. TIER III
The emission control system for the engine is EM/TWC
(Engine Modication and 3-way Catalyst) and for the fuel
tank the Control System is EVAP (Evaporative Emissions)
or N (for nylon tank). Evaporative emission may be appli-
cable to California models only.

7
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 mufer
14. Spark Plug
15. Rear (Top) Handle
nomenClatuRe of paRts
10
11
12
13
14
P/N X503008690
P/N 89019130131
P/N X5240001710
P/N 89022839131
P/N X505002310
15
12
34
5
6
7
8
9
CS-330MX4
P/N X524001970
P/N X524001980
P/N X503008690
P/N X505002060

8
P/N 89019130131P/N X503008690
P/N 89022839131
REPLACEMENT BAR AND
CHAIN
Note:There may be other replace-
ment components for achieving
kickback protection. For details,
please refer to the chain and
bar combination sheet shown in
the instruction manual.
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
P/N X505002310
P/N X524001980 P/N X524001970
P/N X503008690
KICK GUARD® TO BAR INSTRUCTIONS
For saws with Kick Guard®P/N 2894901 and symmetri-
cal 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 ush against guide bar.
pRepaRation foR use
* If a decal cannot be read, a new one can be or-
dered from your ECHO dealer.
Chain brake must be unlocked before removing or
installing clutch cover. Improper cover installation can
result in serious injury and cause severe damage to
saw.
El freno de la cadena debe ser desbloqueado antes
de remover o de instalar la cubierta del embrague. La
instalación incorrecta de la cubierta puede dar lugar a
lesión seria y causar daño severo a la sierra.

9
H
G
J
GUIDE BAR AND SAW CHAIN-INSTALL/ RE-
MOVE
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 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.
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 nger tight.
K
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 “Adjust-
ment, Chain Tension”
P
ML
N
O

10
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 lter 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.
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 lter cover.
HJ
fuel anD lubRiCant
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
WARNING
Alternative fuels, such as E-15 (15% ethanol), E-85 (85% ethanol) or any fuels not meeting ECHO requirements
are NOT approved for use in ECHO 2-stroke gasoline engines. 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.

11
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.
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.
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 certied oil,
such as Echo premium Power Blend XTM, will void the two-stroke engine warranty.
IMPORTANT
Echo premium Power Blend XTM Universal 2-Stroke Oil may be mixed at 50:1 ratio for application in all Echo en-
gines sold in the past regardless of ratio specied in those manuals.
Handling Fuel
WARNING
Fuel is VERY ammable. 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 ames or sparks near fuel.
• Fuel tanks/cans may be under pressure. Always loosen fuel caps slowly allowing pressure to equalize.
• NEVER refuel a unit when the engine is HOT or RUNNING!
• DO NOT ll fuel tanks indoors. ALWAYS ll fuel tanks outdoors over bare ground.
• DO NOT overll fuel tank. Wipe up spills immediately.
• Securely tighten fuel tank cap and close fuel container after refueling.
• Inspect for fuel leakage. If fuel leakage is found, do not start or operate unit until leakage is repaired.
• Move at least 3m (10 ft.) from refueling location before starting the engine.
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, close fuel container, and remix.
IMPORTANT
Spilled fuel is a leading cause of hydrocarbon emis-
sions. 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 lo-
cal government for the laws affecting your area. As a precau-
tion, store fuel in an approved, airtight container. Store in a
well-ventilated, unoccupied building, away from sparks and
ames.
Fuel Mix Chart
50:1

12
CHAIN LUBRICANT
Proper lubrication of the chain while in operation reduces fric-
tion 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 rell chain oil.
FUEL TANK OIL TANK
TANK INDICATION
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.
WARNING
Moving parts can amputate ngers or cause severe injuries. Keep hands, clothing and loose objects away from
all openings. Always stop engine, disconnect spark plug, and make sure all moving parts have come to a com-
plete stop before removing obstructions, clearing debris, or servicing unit.
WARNING
Operation of this equipment may create sparks that can start res around dry vegetation. This unit is equipped
with a spark arrestor and a spark arrestor may be required. The operator should contact local re agencies for
laws or regulations relating to re prevention requirements.
WARNING
Engine exhaust IS HOT, and contains Carbon Monoxide (CO), a poison gas. Breathing CO can cause uncon-
sciousness, serious injury, or death. Exhaust can cause serious burns. ALWAYS position unit so that exhaust is
directed away from your face and body.

13
G
E
C
5. Lay unit on a at, 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 rst
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.
NOTE
If engine does not start after 3 pulls with choke in “run” ( I )
position, repeat cold start instructions 4-7.
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.
D
E
C
F
STARTING COLD ENGINE
WARNING
Make sure bar and chain are not touching anything when start-
ing 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 ll.
3. Fill the chain oil tank with lubricant. Do not over ll.
4. Move ignition/choke lever (A) forward to “close choke” ( )
position.
A
C
B
C

14
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 trig-
ger 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
A
E
D
STOPPING
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 ( ) to stop engine. Return the unit to
your authorized ECHO dealer to check and repair stop
switch before starting the engine again.
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 at, 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.
NOTE
If engine does not start after 5 pulls, use cold start procedure.
A
C
E

15
WARNING
Read the ECHO “CHAIN SAW SAFETY MANUAL” included
with your chain saw for additional cutting and safety instruc-
tions. Failure to obey all instructions may result in serious
or fatal injuries.
In all circumstances the operation of the chain saw is a
one-man job. It is difcult at times to take care for your own
safety, so don’t assume the responsibility for a helper as
well. After you have learned the basic techniques of us-
ing 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 re-
sponses of the saw.
Start the engine, see that it is running properly. Squeeze the
trigger to open the throttle wide open and start the cut. If the
chain is properly sharpened, the cutting should be relatively
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 difcult.
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
metal parts with light oil.
Cutting instRuCtions
GENERAL
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. Avoid it!
Kickback

16
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 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 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
rst cut, very carefully so as not to cause kickback. The nal
cut is made by drawing the saw forward in the cut to reach the
hinge.
felling a tRee
Limbing a fallen tree is much the same as bucking. Never
limb on the tree that you are standing. When limbing, cau-
tion is the word. Be careful of the tip touching other limbs.
Always use both hands.
2”
45°
2”
DIRECTION
OF FALL
Direction of fall
Hinge
Felling cut
First cut
Notch
Second cut
One-third tree
diameter
LIMBING

17
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.
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 at ground or sup-
ported 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.
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.
Comply with the Safety Precautions as listed on page
2 and 3 of this manual.
BUCKING
Uphill position
FINISH CUT
FIRST CUT
Board or at stones
KICKBACK
• Improper thrust cutting.
• When the bar nose hits another tree, etc.

18
maintenanCe anD CaRe
WARNING
Moving parts can amputate ngers or cause severe injuries. Keep hands, clothing and loose objects away from
all openings. Always stop engine, disconnect spark plug, and make sure all moving parts have come to a com-
plete stop before removing obstructions, clearing debris, or servicing unit.
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. Common tools may be required.
Level 2 = Moderate difculty. Some specialized tools may be required.
ECHO offers REPOWERTM Maintenance Kits and Parts to make your maintenance job easier.
maintenanCe inteRvals
COMPONENT/
SYSTEM
MAINTENANCE
PROCEDURE
REQ'D
SKILL
LEVEL
DAILY OR
BEFORE
USE
EVERY
REFUEL
3 MONTHS
OR 90
HOURS
YEARLY 600
HOURS
Air Filter Inspect/Clean 1I / C * R *
Automatic Oiler Inspect/Adjust 1I
Oil Filter Inspect/Replace 1I I/C *
Fuel System Inspect/Replace 1I (1) * I (1) *
Fuel Filter Inspect/Replace 1I * I / R *
Fuel Cap Gasket Replace 1I * R *
Guide Bar & Sprocket
Nose Inspect/Clean/Lubricate 1I / C * I
Saw Chain Inspect/Sharpen/Replace/
Tensioning 2I *
Sprocket Inspect/Replace 2I *
Spark Plug Inspect/Clean 1I / C / R *
Cooling System Inspect/Clean 2I / C
Muffler Spark Arrestor Inspect/Clean/Replace 2I / C / R *
Cylinder Exhaust Port Inspect/Clean/Decarbon 2I / C
Recoil Starter Rope Inspect/Clean 1I / C *
Screws/Nuts/Bolts Inspect/Tighten/Replace 1I *
(1) Low evaporative fuel tanks DO NOT require regular maintenance to maintain emission integrity.
* Replacement is recommended based on the finding of damage or wear during inspection.
MAINTENANCE PROCEDURE LETTER CODES: I = INSPECT, R = REPLACE, C = CLEAN
IMPORTANT NOTE - Time intervals shown are maximum. Actual use and your experience will determine the
frequency of required maintenance.
MAINTENANCE PROCEDURE NOTES:

19
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 uid.
5. If the inside of the oil tank is dirty, rinse with suitable cleaning
uid.
6. Install strainer into lower front of oil tank to ensure proper
chain lubrication.
FUEL STRAINER
1. Do not allow dust to enter fuel tank.
2. Clogged strainer will cause difculty in starting engine or ab-
normalities 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 uid.
5. If the inside of the tank is dirty, rinse with suitable cleaning
uid.
GUIDE BARS AND OIL HOLES
• Follow instructions for “Guide Bar and Saw Chain – Install/Re-
move” .
• Clean after each use
- Clean the grooves (A) of the guide bar with a small screw-
driver.
- 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.
AIR FILTER
1. Close choke (Cold Start Position [ ]). This prevents dirt from
entering the carburetor throat when the air lter is removed.
Brush accumulated dirt from air cleaner area.
2. Remove air lter cover. Brush dirt from inside cover.
3. Remove air lter and lightly brush debris from lter. Replace
lter if it is damaged, fuel soaked, very dirty, or deformed.
4. Install air lter cover.
AUTOMATIC 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.
D
B
A
C

20
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.
Worn : 0.5 mm
C
SPARK PLUG
• Check periodically.
IMPORTANT
Use only NGK BPM-8Y spark plug (BPMR-8Y in Canada) other-
wise 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 kgf • cm (130 – 150 in • lbf)
IMPORTANT
Do not over-torque
COOLING SYSTEM CLEANING
NOTE
See “Guide Bar and Saw Chain-Install/Remove Instructions for
sprocket guard removal/replacement instructions.
Mufer Side
1. Remove air lter cover and remove spark plug lead.
2. Remove two guide bar nuts and remove sprocket guard.
3. Remove three mufer cover screws and remove mufer cover.
4. Using a stiff bristle cleaning brush (do not use a metal brush), re-
move debris from cylinder ns in mufer area.
5. Assemble components in reverse order
Starter Side
1. Remove air lter 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), re-
move debris from ywheel and ignition coil area.
5. Assemble components in reverse order.
D