Chain Saw
InstructionManual
MODEL : CS-305
WARNING
DANGER
Readrulesforsafeoperationandinstructionscarefully.ECHOprovidesanInstruction
ManualandaSafety Manual.Bothmustbereadandunderstoodforproperandsafe
operation.
X750006731
06/05
X7503204801
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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.
15.Operate the chain saw only in well-ventilated
areas.
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.
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 instruc-
tions, should be performed by competent chain
saw service personnel. (For example, if im-
proper tools are used to remove the flywheel
or if an improper tool is used to hold the fly-
wheel in order to remove the clutch, structural
damage to the flywheel could occur and could
subsequently cause the flywheel to burst.)
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 to-
ward you or pull you off balance.
18.When transporting your chain saw, use the
appropriate guide bar scabbard.
19.Spark arrestor mufflers approved to SAE Stan-
dard 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 ar-
restor screen.
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.
CONTENTS
Page
Rules for Safe Operation .................................................................................................. 2
Technical Data ................................................................................................................. 4
Emission Data ................................................................................................................. 5
Description ...................................................................................................................... 5
Part Location and Description ......................................................................................... 6
Preparation for Use.......................................................................................................... 7
Fuel and Lubricant............................................................................................................ 8
Operation....................................................................................................................... 10
Cutting Instructions ......................................................................................................... 12
KickBack Safety Features.............................................................................................. 15
Maintenance and Care ................................................................................................... 16
Chain and Guide Bar Combinations ............................................................................... 19
Setting the Saw Chain.................................................................................................... 20
Troubleshooting.............................................................................................................. 21
Storage .......................................................................................................................... 22
Correct Use of Chain Brake ........................................................................................... 23
Servicing Information...................................................................................................... 24
3
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TECHNICAL DATA
Model
CS-305
Dimension
L x W x H
mm
inch
kg
380 x 235 x 220
10.2 x 9.2 x 8.7
3.4 (7.5 lb)
Weight
Engine
Power head, dry
Without chain and guide bar
Air-cooled, two-stroke, single cylinder
30.1 (1.83 cu.in.)
Type
Displacement
Carburetor
ml
Diaphragm type
Magneto
Spark Plug
Starter
Flywheel magneto : CDI system
NGK BPMR-8Y
Recoil starter
Power transmission
Automatic centrifugal clutch
Fuel
Oil
Mixture ratio
50:1 ratio with ECHO brand two-stroke oil.
89 octane unleaded. Do not use fuel containing methyl alcohol,
more than 10% ethyl alcohol or 15% MTBE.
Tank Capacity
Bar and chain
Tank Capacity
L
L
0.27 (9.3 fl oz U.S.)
ECHO bar and chain oil (or motor oil)
0.15 (5 fl. oz. U.S.)
Saw chain
Guide bar
14 in. Standard
12 in. Optional
Lubrication
Adjustable automatic oil pump
Standard
features
Conventional handle
Rear hand guard
Front hand guard,
Anti-vibration device,
Throttle control lockout, Chain brake,
Chain catcher, Spark arrestor muffler
Engine RPM
Idle
2800 - 3500
Wide Open Throttle (WOT)
10000 - 12000
* Technical data subject to change without notice.
IMPORTANT
This spark ignition system complies with Canadian ICES-002.
4
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EMISSION DATA
EMISSION CONTROL
EPA Phase 2
The emission control system for these engines are
EM(EngineModification).
IMPORTANTENGINEINFORMATION
ENGINE FAMILY: 4EXHS.0334RA DISPLACEMENT: 30.1 CC
EMISSION COMPLIANCE PERIOD : 300 HRS.
THIS ENGINE MEETS U.S. EPA PAHSE 2 EMISSION REGULA-
TIONS FOR SMALL NONROAD ENGINE. REFER TO OWNER'S
MANUAL FOR MAINTENANCE SPECIFICATIONS AND
ADJUSTMENTS.
An Emission Control Label is located on the engine. (These are EXAMPLES ONLY, information on label
variesbyengineFAMILY).
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 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 - PowerHead
1 - GuideBar
1 - Kick Guard
1 - Hex Head Bolt
1 - Hex Nut
1 - SawChain
1 - InstructionManual
1 - SafetyManual
1 - WarrantyRegistrationCard
1 - Limited Warranty Statement
1 - T-Wrench
1 - Echo Power Blend TM 2-stroke oil sample
5
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PART LOCATION AND DESCRIPTION
CS-305
1
2
13
3
10
9
4
11
6
5
7
8
20
21
12
18
13
14
15
19
21
17
16
7. Muffler
14. Throttle control latch
15. On / Off switch
16. Oil tank cap
17. Fuel tank cap
18. Purgebulb
1. Fronthandle
2. Handguard
8. Rearhandguard
9. Throttlecontrollockout
10. Throttlecontroltrigger
11. Aircleanercover
(Chainbrakeactuatinglever)
3. Saw chain
4. Guidebar
12. Chain tension adjustment screw
13. Pull starter
19. Kick guard
5. Chaincatcher
6. Sprocketguard
20. Spark Plug
21. Choke
6
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PREPARATION FOR USE
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 flush against guide bar.
WARNING
DANGER
Saw Chain is sharp! Always wear gloves when handling
assembly, otherwise serious personal injury may result.
GUIDE BAR AND SAW CHAIN
G
•
•
•
Remove two guide bar nuts (I) and remove sprocket guard
(J).
Mount guide bar (G) on studs, and slide toward sprocket
to make saw chain installation easier.
Install saw chain (H) as shown, with cutters on top of
guide bar facing forward.
K
H
IMPORTANT
Be certain tensioner (K) fits into lower adjuster hole before
tightening guide bar nuts.
J
NOTE
Move chain brake lever fully rearward to install sprocket
guard to saw.
•
•
Install sprocket guard (J), and tighten guide bar nuts finger
tight.
I
Adjust saw chain tension, as instructed in “Adjustment,
Chain Tension.”
7
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ADJUSTMENT, CHAIN TENSION
•
Remove spark plug lead.
• Loosen two guide bar nuts (I), if necessary.
•
•
Hold the bar nose up, and turn the adjuster screw (L)
clockwise until the chain touches the bottom of the
bar.
Tighten both guide bar nuts with bar nose held up.
L
IMPORTANT!
Tighten guide bar nuts to 90 – 110 kgf/cm (80 – 95
in. lbs.) DO NOT over-tighten nuts. Damage to saw
may result.
•
•
Pull the saw chain around the guide bar by hand.
Reduce chain tension, if you feel tight spots.
Keep chain properly tensioned at all times.
NOTE
All chains require frequent adjustments.
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
isNOTapproved.
Oil
Two Stroke Oil - A two-stroke engine oil meeting ISO-L-EGD
(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 BlendTM, 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 Explana-
tion.)
50
Gasoline
IMPORTANT
Echo premium Power BlendTM 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.
8
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MixingInstructions
1. Fill an approved fuel container with half of the required
amountofgasoline.
Fuel Mix Chart
50:1
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
containerandsurroundingarea.
(U.S.)
(METRIC)
GAS
GAS
Gal.
OIL
OIL
cc.
Fl. oz.
Liter
1
2
5
2.6
5.1
12.8
4
8
20
80
160
400
IMPORTANT
Stored fuel ages. Do not mix more fuel than you expect to
use in thirty (30) days, ninety (90) days when a fuel stabi-
lizer is added.
Stored two-stroke fuel may separate. ALWAYS 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 shut-
off containers to reduce fuel spillage. Contact your ECHO
dealerfororderinginformation.
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.
TANK INDICATION
• 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
FUEL TANK
OILTANK
SAE NO. 10 ..... in winter or when cutting resinous trees.
• When refueling, also refill chain oil.
9
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OPERATION
WHEN THE ENGINE IS COLD
WARNING
DANGER
Make sure bar and chain are not touching anything when
starting the saw.
•
Move chain brake lever fully forward to engage chain brake
before starting.
•
•
•
•
•
•
Fill the fuel tank with fuel.
Fill the chain oil tank with lubricant.
Turn switch (A) to “RUN” position (I).
Pull choke (B) all the way out (closed position).
Push purge bulb (C) 10 times.
A
Pull starter handle several times until first firing sound is
heard. (Secure unit on ground with your knee or foot.) (5 -
6 pulls maximum.)
•
•
Push choke (B) all the way in. (open position)
Pull starter handle again.
C
NOTE
If engine does not start after 5 pulls, repeat instructions.
WHEN THE ENGINE IS HARD TO START
WARNING
DANGER
B
Clutchengagesandchainmayrotatewhenengineisstarted
with throttle control latch engaged. Never use the throttle
control latch for cutting. Use only when starting the engine.
•
Press throttle control lockout down, squeeze throttle
trigger, and push in throttle control latch.
•
•
Pull starter handle.
When engine starts, immediately squeeze throttle trigger
to release the latch otherwise damage to clutch may
result.
NOTE
Do not pull starter rope out to the maximum possible
position.
Do not allow recoil handle to snap back against the
casing.
Securely hold the saw.
10
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STARTING WARM ENGINE
•
Ensure that there is fuel and chain oil in the tanks. (If fuel
tank was emptied during previous operation, refill tank and
push purge bulb 10 times.)
•
•
•
Turn switch (A) to “RUN” position (I).
Pull starter handle.
Choke may be used if necessary, but be sure to push it
back on first firing sound.
NOTE
If engine does not start after 5 pulls, use cold start
procedure.
A
RUNNING
WARNING
DANGER
The saw chain should not move at idle, otherwise serious
personal injury may result.
NOTE
If saw chain moves adjust carburetor according to
“CarburetorAdjustment” instructions in this manual, or
see your dealer.
•
•
After engine starts, allow it to return to idle.
Move chain brake lever fully rearward to release 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.
STOPPING
•
Release throttle trigger and turn switch (A) to STOP (O)
position.
A
NOTE
If engine does not stop, pull choke out fully to stop
engine.
Check and repair stop switch before starting the engine
again.
11
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CUTTING INSTRUCTIONS
WARNING
GENERAL
DANGER
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 difficult at times to take care for your own safety,
so don’t assume the responsibility for a helper as well. After
you have learned the basic techniques of using the saw, your
best aid will be your own good common sense...
The accepted way to hold the saw is to stand to the left of the
saw with your left hand on the front handlebar and your right
hand on the rear handle so you can operate the throttle trigger
with your right index finger.
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 difficult.
NOTE
Some material may adversely affect the housings of your
ECHO chain saw.
Kickback
(Example: Palm TreeAcid, fertilizer, etc.) To avoid housing
deterioration, carefully remove all packed saw dust around
clutch and guide bar area and wash with water.
WARNING
DANGER
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!
12
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FELLING A TREE
WARNING
DANGER
DIRECTION
OFFALL
A falling tree can cause serious injury or damage any-
thing 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. 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 to avoid
the trunk kicking back over the stump.
45°
Direction of fall
First cut
Hinge
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.
2”
Felling cut
2”
Notch
Second cut
One-third tree
diameter
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.
LIMBING
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.
13
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Don’t cut with the saw overhead or the bar in a vertical posi-
tion. 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.
BUCKING
Keep both hands on the handles at all times.
Support logs if possible.
Uphill position
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.
FINISH CUT
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. To
cut the trunk, use the bucking and two-cut sequence shown.
The first cut should be no deeper than one-third the trunk
diameter.
FIRST CUT
Board or flat stones
KICKBACK
WARNING
DANGER
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 back-
wards towards the operator.
•
Improper thrust cutting.
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
of this manual.
•
When the bar nose hits another tree, etc.
14
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INFORMATION
Kickback Safety Features
The following features are standard for this model as Kickback Safety Features.
•
Double Guard Low Kick Type Guide Bar or Asymmetrical Low Kick Type Guide Bar
Note: Your saw chain can be used with either of these bars.
Double Guard Bar
Reduced nose
radius
NOTE
Use ECHOTM replacement guide bars.
These guide bars may be considered to have equivalent kickback reduction:
• Sprocket nose guide bars of the same length and nose radius, same pitch and having the same number of teeth.
• A hard nose guide bar having the same length and nose radius as a sprocket nose bar.
• Low Kick Guard Link Type Saw Chain
The low kick, guard link chain must be maintained correctly. Follow instruction “SETTING THE CHAIN” in this Instruc-
tion Manual.
• Front Hand Guard (Chain Brake Actuating Lever)
The front handle guard must be installed correctly and kept in good condition.
• Chain Brake
Chain brake must be maintained correctly. Follow instruction “CORRECT USE OF CHAIN BRAKE” in this Instruction
Manual.
• Kick Guard
Kick guard must be installed properly. Follow instructions provided.
WARNING
DANGER
Using improper replacement components or removing safety devices may result in serious or fatal injury.
15
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MAINTENANCE AND CARE
AIRFILTER
A
•
•
•
•
Checkbeforeeveryuse.
Pull choke (A) all the way out (close position).
Loosen bolt and remove air cleaner cover (B) and filter (C).
Lightly brush dust off filter, and inspect for damage.
C
B
AUTOMATICOILER
•
The discharge volume of the automatic oiler is adjusted to 3
to4cc/mm(@7000rpm)priortoshipmentfromthefactory.
Always check oil discharge when in use.
Turn adjusting screw (D) counter-clockwise to increase oil
volume, clockwise to decrease oil volume.
•
•
D
E
OILSTRAINER
Checkperiodically.
•
-
-
Do not allow dust to enter into oil tank.
Clogged oil strainer will affect the normal lubricating
system.
-
-
Pick it up through oil port.
If the strainer (F) is dirty, remove cover (E), pull strainer
out of oil tank, and wash it in suitable cleaning fluid.
When the inside of the tank gets dirty, rinsing the tank
out with gasoline will clean it.
F
-
FUELSTRAINER
Checkperiodically.
•
-
-
Do not allow dust to enter fuel tank.
Cloggedstrainerwillcausedifficultyinstartingengineor
abnormalitiesinengineperformance.
-
-
-
Pickupthefuelstrainer(G)throughfuelinletportwitha
piece of steel wire, or the like.
When the strainer is dirty, replace, or wash it in suitable
cleaningfluid.
When the inside of the fuel tank is dirty, rinsing the tank
out with suitable cleaning fluid will clean it.
G
GUIDEBARANDOILHOLES
•
Clean after each use
H
-
Cleanthegrooves(H)oftheguidebarwith,forexample,
asmallscrewdriver.
-
Clean oil holes (I) with a wire.
•
Reverseguidebarperiodically.
I
16
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SPROCKET
I
•
A damaged sprocket (J) will cause premature damage
or wear of saw chain.
-
When the sprocket has worn out 0.5mm (.020”) or
more, replace it.
•
•
Check sprocket when you install new chain. Replace it
ifworn.
Clean sprocket, clutch, and bar mount area before
installation of bar.
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.
J
SPARK PLUG
•
•
•
Checkperiodically
Gap = 0.65mm (.026 in.)
Replace if either electrode is worn, or if the insulator
is fouled by oil or other deposits.
•
Torque = 145 – 155 kg*cm (125 – 135 in. lb.)
IMPORTANT
Donotover-torque.
COOLING SYSTEM CLEANING
•
•
Removesparkpluglead.
Removetwo(2)mufflercoverscrewsandmuffler
cover(A).
A
•
•
Remove four (4) recoil starter housing screws and
starter housing (B).
Use a stiff bristle cleaning brush (do not us a metal
brush) to remove dirt from cylinder fins in muffler and
ignition coil areas.
B
17
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CARBURETOR ADJUSTMENT
1. Start engine and run for several minutes to reach operat-
ingtemperature.
Engine Break-In
New engines must be operated a minimum duration
of two tanks of fuel break-in before carburetor adjust-
ments can be made. During the break-in period your
engineperformancewillincreaseandexhaust
emissions will stabilize. Idle speed can be adjusted
asrequired.
2. Stopengine.Removegrommetcover(A)over“H”and“L”
limiterneedles.
3. Start engine and turn the high-speed needle rich (CCW)
until the engine runs between 10,000 and 12,000 RPM.
Then turn the low-speed needle rich (CCW) until the
engine does not hesitate when accelerated.
BEFOREMAKINGADJUSTMENTS:
DO NOT REMOVE LIMITER CAPS!
•
•
•
•
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
properlytensioned.
4. Idle Speed Adjustment.
• Start engine and turn “idle” speed adjustment screw (B)
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.
LOWALTITUDEADJUSTMENT
Engines that have been adjusted to operate at high
altitudes must be readjusted to operate properly at
altitudes below 2000 feet.
6. Install grommet cover (A) over “H” and “L” limiter needles.
HIGHALTITUDEADJUSTMENT
Highaltitudeadjustmentmayberequiredforproperoperation
of this engine above 2000 feet.
1. Start engine and run for several minutes to reach operat-
ingtemperature.
A
2. Stopengine.Removegrommetcover(A)over“H”and“L”
limiterneedles.
3. Start engine and turn the HI speed needle lean (CW) until
the engine runs between 10,000 and 12,000 RPM. Then
turn the LO speed needle lean (CW) until the engine does
not hesitate when accelerated.
B
DO NOT REMOVE LIMITER CAPS!
4. Idle Speed Adjustment.
• Start engine and turn “idle” speed adjustment screw (B)
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.
6. Install grommet cover (A) over “H” and “L” limiter needles.
18
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CHAIN AND GUIDE BAR COMBINATION
The following combinations may be used on CS-305.
DOUBLE
SAW CHAIN
GUARD BAR
KICK
GUARD
BAR
MODEL
CS-305
LENGTH
ECHO P/N
(OEM P/N)
ECHO
PART NO.
ECHO P/N
(OEM P/N)
LINKS
45
TYPE
90SG
PITCH
3/8"
GAUGE
.043
124374501/
(12A4CD3745)
12"
14"
1907045
1907052
2894901
28949
144375201/
(14A4CD3752)
52
*Reduced nose radius symmetrical bars (OREGON name — Double Guard)
WARNING
DANGER
Useofreplacementsawchainand/orguidebarotherthanthatspecified,oroperationwithoutthe“tipguard”inplace,may
cause severe kickback resulting in serious injury.
Onlyusesawchaindesignatedas,“LOW-KICKBACK,”thatmeetstheANSIB175.1-2000Standard,andtheEchoguide
barspecified.
IMPORTANT
Chain and guide bar gauge size must be identical. Use Bar/Chain combinations shown in table
above.
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
Refer to your Chain Saw Safety Manual for kick guard application information.
SETTING THE SAW CHAIN
For setting saw chains, round file (4 mmø: 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.
To sharpen other type chain, follow chain manufacturer’s instructions
Type : 90SG
Depth
gauge
1/5
30°
Keep this angle
ONEFIFTHOFFILEDIAMETER
REMAINS ABOVE CUTTER EDGE
HOLDFILEHOLDER
LEVEL
PUSH FILE AS SHOWN
19
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•
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
Round
off the
edge
Remove
until flat
with tool
•
Properly filed cutters are shown below.
(Top plate angle)
(Side plate angle)
(Top plate cutting angle)
(Depth gauge)
0.64 mm (0.025 in.)
50°
80°
Parallel
30°
•
•
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, rotate 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.
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.
(SPROCKET)
(DRIVE LINK)
90S
•
•
Chain type number (A) is stamped on drive link.
Sprocket pitch (B) is stamped on clutch drum.
Number
indicates
Number
indicates Chain
type
Chain type
90
A
B
20
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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.
Fuel is not
Table 1
Fuel strainer clogged ................................... Clean.
reaching carburetor
Fuel pipe clogged ........................................ Clean.
Suction insufficient ....................................... Makesufficient.
Fuel is not reaching
cylinder
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.
No spark at high tension
cord end.
High-tension cord connection defective ......... Repair as necessary.
Switch is grounded ....................................... Switch on.
Insulator cracked .......................................... Replace plug.
Spark gap incorrect ...................................... Adjust.
No spark at plug
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 does not
keep running
Fuel pump diaphragm defective ..................... Replace.
Fuel passage clogged with dust ................... Disassemble and clean.
Fuel leaking from fixing surfaces .................. Retighten all screws.
of carburetor
Acceleration
and low speed
function
Air valve, fuel tank cap does not
work normally ............................................... Replace or Clean.
defective
Fuel pump does not operate .......................... Check impulse drilling.
Carburetor
overflow
Fuel inlet needle valve clogged with dust ....... Clean.
Metering lever spring not placed
in dent of lever .............................................. Correct.
Muffler sticky with fuel ................................... Fuel mixture is too rich
Start the engine several times
with choke rod fully open and
run at fast idle until engine
does not smoke.
Bearing damaged ......................................... Disassemble and replace.
Piston and/or cylinder seized ........................ Disassemble and replace.
Crankshaft worn ........................................... Disassemble and replace.
Crankshaft contacting crankcase .................. Disassemble and replace.
Engine does
not crank
21
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Table 2
Improper fuel used ........................................ Use fuel with correct mixing ratio. Never use
gasoline of poor quality.
Spark plug defective (worn) ........................... Replace.
Engine
overheated
As cooling fins clogged, air
does not pass well ........................................ Clean fins.
Excessive deposits in
combustion chamber ..................................... Disassemble and remove carbon.
Firing function
defective
Plug damaged or fouled ................................ Replace or clean.
Comubstion poor due to
defective wiring ............................................ Check wiring.
High-speed needle setting incorrect ............. Readjust.
Carburetor
defective
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
Other
troubles
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 does not cut
clean
Chain saw pressed against
tree to firmly ................................................. Press lightly.
Chain stops
(Clutch slips)
Clutch shoe worn out .................................... Replace.
No oil in tank ................................................ Refill.
Oil delivery incorrect ..................................... Adjust.
Chain poorly
lubricated
Oil contaminated with dust ............................ Rinse tank and fill with new oil..
Oil viscosity inappropriate ............................. Use oil with correct viscosity for summer or winter.
STORAGE AFTER USE
•
Inspect and adjust every part of the chain saw.
- Completely clean every part, and repair, if necessary.
- Apply thin coating of oil on metal parts to prevent rust.
- Remove chain and guide bar, apply sufficient oil coating and wrap them up in plastic.
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 and crank engine until the piston is at TOP
DEAD CENTER.
•
Store in a dry area, free from dust.
22
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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. You 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
CSA Standard Z 62.1 CHAIN SAWS
Canada:
WARNING
DANGER
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 main-
tained in compliance with the Standard B175.1-2000.
Kickback Motion:
Function:
•
When the bar nose hits another tree, etc.
•
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.
INSTALLATION
TESTING THE BRAKE
•
Echo recommends that the chain brake should be
serviced by an authorized Echo servicing dealer.
•
•
•
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.
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.
IMPORTANT
Do not allow the saw to tip forward in order to avoid
damage to the chain.
•
Do not attempt to operate the engine with the brake
engaged.
If the chain does not stop, immediately return the saw to your
authorized Echo dealer for repair.
23
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SERVICING INFORMATION
PARTS
GenuineECHOPartsandECHOREPOWERTM PartsandAssembliesfor
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.
Model No. _____________ SN. __________
SERVICE
DEALER?
Call
1-800-432-ECHO
or
Service of this product during the warranty period must be performed
by an Authorized ECHO Service Dealer. For the name and address of
the Authorized ECHO Service Dealer nearest you, ask your retailer or
call: 1-800-432-ECHO. 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
ConsumerProductSupportDepartmentat1-800-673-1558from8:30am
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.
CONSUMER PRODUCT
SUPPORT
1-800-673-1558
8:30 - 4:30 Mon - Fri C.S.T.
WARRANTY CARD
This card is our means of registering all original owners of ECHO
equipment. The card plus proof of purchase provides you the assur-
ance that authorized warranty work will be done. It also provides a
direct link between you and ECHO if we find it necessary to contact
you.
ADDITIONAL OR REPLACEMENT MANUALS
Safety Manuals in English/Spanish or English/French are available, free of charge, from your ECHO dealer or at
Operator'sandPartsManualsareavailableby:
• Downloadingfreefromwww.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
400OAKWOOD ROAD
LAKE ZURICH,IL 60047
04001001/04999999
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