Echo CS-305 User manual

X7503205500 X750008780
12/05
Chain Saw
InstructionManual
MODELS : CS-305
CS-306
WARNING DANGER
Readrulesforsafeoperationandinstructionscarefully.ECHOprovidesanInstruction
ManualandaSafety Manual.Bothmustbereadandunderstoodforproperandsafe
operation.

2
RULES FOR SAFE OPERATION
A. Kickback Safety Precaution for Chain Saw Users
WARNING!
KICKBACKmayoccurwhen thenose ortip ofthe
guide bar touches an object, or when the wood
closesinand pinchesthe sawchainin thecut.
Tip contact in some cases may cause a lightning
fastreverse REACTION,Kicking theguidebarup
andbacktowards theoperator. Pinchingthesaw
chainalongthetopof theguide barmaypush the
guide bar rapidly back towards the operator. Ei-
therofthesereactionsmaycauseyoutolosecon-
trol of the saw which could result in serious per-
sonalinjury.
The Kick Guard ®device is not installed on the
guide bar when you purchase your ECHO chain
saw.TheKickGuard®canbeusedinamajorityof
cuttingoperations,andisespeciallyrecommended
forbeginners,homeowners,orchainsawnovices.
Mostcuttingoperationscanbeaccomplishedwith
theKickGuard®in place.
Donotrelyexclusivelyuponthesafetydevicesbuilt
intoyoursaw.Asachainsawuser,youshouldtake
several steps to keep your cutting jobs free from
accidentor injury.
1. With a basic understanding of kickback, you
canreduceoreliminatetheelementofsurprise.
Suddensurprisecontributestoaccidents.
2.Keep a good firm grip on the saw with both
hands, the right hand on the rear handle, and
theleft handonthefronthandle,whenthe en-
gineisrunning.Useafirmgripwiththumbsand
fingersencirclingthechain sawhandles.Afirm
grip will help you reduce kickback and main-
taincontrol ofthe saw.Don’t’let go.
3. Make sure that the area in which you are cut-
ting is free from obstructions. Do not let the
noseoftheguidebar contacta log,branch, or
anyotherobstruction whichcouldbe hitwhile
youareoperatingthesaw.
4. Cutathigh enginespeeds.
5. Donotoverreachorcutaboveshoulderheight.
6. Follow manufacturer’s sharpening and main-
tenanceinstructions forthe sawchain.
7. Onlyusereplacement barsandchains speci-
fiedby themanufacturerortheequivalent.
B. Other Safety Precautions
1. Donotoperateachainsawwithonehand!Se-
rious injury to the operator, helpers, bystand-
ers,oranycombinationof thesepersons may
resultfromone-handedoperation.Achainsaw
isintendedfortwo-handeduse.
2. Do not operate a chain saw when you are fa-
tigued.
3. Usesafetyfootwear; snug-fittingclothing; pro-
tectivegloves;andeye,hearing andheadpro-
tectiondevices.
4. Usecautionwhenhandlingfuel.Movethechain
sawatleast3m (10feet)fromthefuelingpoint
beforestartingtheengine.
5. Donotallowotherpersonstobenearthechain
sawwhenstartingorcuttingwiththechainsaw.
Keepbystandersand animals outofthe work
area.
6. Donotstartcuttinguntilyouhaveaclearwork
area,securefooting,andaplannedretreatpath
fromthe fallingtree.
Copyright©2005 ByEcho,Incorporated
All Rights Reserved.

3
7. Keepallpartsofyourbodyawayfromthesaw
chainwhen theengineisrunning.
8. Before you start the engine, make sure that
thesaw chainis notcontacting anything.
9. Carrythechainsaw withthe enginestopped,
the guide bar and saw chain to the rear, and
themufflerawayfromyourbody.
10.Donotoperate achainsaw that isdamaged,
improperly adjusted, or not completely and
securely assembled. Be sure that the saw
chain stops moving when the throttle control
trigger is released.
11. Shutofftheenginebeforesettingthechainsaw
down.
12.Useextremecaution when cuttingsmall size
brushandsaplingsbecauseslender material
may catch the saw chain and be whipped to-
wardyou orpull youoff 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.
14.Keep thehandles dry, clean,and freeofoil or
fuelmixture.
15.Operatethechain sawonlyin well-ventilated
areas.
16.Do not operate a chain saw in a tree unless
youhavebeen specificallytrainedto doso.
17.Allchainsawservice,otherthantheitemslisted
intheInstructionManualmaintenanceinstruc-
tions,shouldbeperformedbycompetentchain
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-
wheelin ordertoremovetheclutch,structural
damagetotheflywheelcould occurandcould
subsequentlycausetheflywheeltoburst.)
18.When transporting your chain saw, use the
appropriate guide bar scabbard.
19.SparkarrestormufflersapprovedtoSAEStan-
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
defectivemuffler.Donotremovethesparkar-
restorscreen.
WARNING DANGER
•Duringoperation,themufflerorcatalyticmufflerandsurroundingcoverbecomehot.
•Neversuspendthesawonalanyardwiththeenginerunning.
•Alwaysuse thesaw fromthe right-handside ofyour body–NEVER fromtheleftside.
•Alwayswearpropersafetyclothingtoprotectyourlowerbodyfromsharpsawchainandhot
muffler.
•Alwayskeepexhaustareaclearofflammabledebrisduringtransportationorwhenstoring,
otherwiseseriouspropertydamageorpersonalinjurymayresult.
WARNING DANGER
Usingimproper replacement componentsor removing safetydevices mayresult in seriousor fatalinjury.

4
CONTENTS Page
RulesforSafe Operation..................................................................................................2
TechnicalData .................................................................................................................5
Emission Data .................................................................................................................6
Description ......................................................................................................................6
Nomenclatureof Parts......................................................................................................7
PreparationforUse..........................................................................................................8
Fueland Lubricant............................................................................................................9
Operation....................................................................................................................... 11
CuttingInstructions .........................................................................................................13
MaintenanceandCare...................................................................................................16
Chain and Guide Bar Combinations...............................................................................21
Troubleshooting..............................................................................................................23
Storage..........................................................................................................................24
Correct Use of Chain Brake ...........................................................................................26
ServicingInformation......................................................................................................28

5
TECHNICAL DATA
* Technical data subject to change without notice.
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12000 - 12500

6
EMISSION CONTROL
EMISSIONDATA
DESCRIPTION
TheECHOproductyoupurchasedhasbeenfactorypre-assembledforyourconvenience.Duetopackaging
restrictions, guide bar and saw chain installation and other assembly may be necessary.
Afteropeningthe carton,checkfor damage. Immediatelynotifyyour retailerorECHO Dealerofdamaged or
missing parts. Use the contents list to check for missing parts.
CONTENTS
1 - PowerHead
1 - GuideBar
1 - KickGuard
1 - Hex Head Bolt
1 - Hex Nut
1 - SawChain
1 - InstructionManual
1 - SafetyManual
1 - WarrantyRegistrationCard
1 - LimitedWarrantyStatement
1 - T-Wrench
PRODUCT EMISSION DURABILITY
The300 hour emission durability complianceperiod is the time spanselected by the manufacturer certifying
theengineemissionsoutputmeetsapplicableemissionsregulations,providedthatapprovedmaintenance
proceduresare followed as listed inthe Maintenance Section of thismanual.
EPA Phase 2/California Tier 2
The emission control system for these engines are EM (Engine Modification and Catalyst).
An Emission Control Label islocated on theengine. (These are EXAMPLESONLY, information onlabel
variesbyengineFAMILY).
IMPORTANTENGINEINFORMATION
ENGINEFAMILY: 6EHXS.0334RA DISPLACEMENT: 30.1CC
EMISSIONCOMPLIANCEPERIOD: 300 HOURS
THIS ENGINE MEETS U.S. EPA PH2 AND 2005 - 2006
CALIFORNIA EMISSION REGULATIONS FOR SOREs.
REFER TO OWNER'S MANUAL FOR MAINTENANCE
SPECIFICATIONS AND ADJUSTMENTS.

7
11
12
1. Fronthandle
2. Handguard
(Chainbrakeactuatinglever)
3. Sawchain
4. Guidebar
5. Chaincatcher
6. Sprocketguard
7. Muffler
8. Rearhandguard
9. Throttlecontrollockout
10. Throttlecontroltrigger
11. Aircleanercover
12. Chaintensionadjustmentscrew
13. Pull starter
14. Throttlecontrollatch
15. On / Off switch
16. Oil tank cap
17. Fuel tank cap
18. Purgebulb
19. Kick guard
20. Spark Plug
CS-305, 306 NOMENCLATURE OF PARTS
12
3
4
5
7
8
9
14
16
17
18
6
10
13
19
13
20
P/N 89016006361
TOAVOID KICKBACK
1. Hold the chain saw firmly with
both hands.
2. Don’t let the nose of the guide
bar contact any obstruction.
3. Tip contact may suddenly move
the guide bar upward and backward,
which may cause serious injury.
P/N89019130131
ADVERTENCIA PELIGRO
P/N89022839131
Esta unidad puede ser peligrosa y producir lesiones
personales graves si no se usa en forma adecuada.
Para reducir el riesgo de lesioarse, los operadores, los
ayudantes y los espectadores deben leer y comprender el Manual Del
Operador y los Manuales De Seguridad que se entregan escritos en
español.
REPLACEMENT BARANDCHAIN
Note:There may be other replacement
components for achieving
kickback protection. For details,
please refer to the chain and bar
combination sheetshownin the
instruction manual.
P/NX524000791
GUIDE BAR*CHAIN*
PARTNO. TYPE LINKS
12” 120374501 OREGON 91VG 45
14” 140375201 OREGON 91VG 52
* Ifa decal cannot beread,
anewonecanbeordered
fromyourECHOdealer.
15
WARNING!!
Read and follow all safety precautions in the
Instruction manual. Failure to follow instruc-
tions could result in serious personal injury.
CHAIN SAW 87G1
IN ACCORDANCE WITH
AMERICAN NATIONAL
STANDARDSAFETY
REQUIREMENTSFOR
GASOLINEPOWERED CHAIN SAWS
(ANSIB175.1-2000)

8
PREPARATION FOR USE
G
H
J
K
I
GUIDE BAR AND SAW CHAIN-INSTALL/
REMOVE
WARNING DANGER
SawChainissharp!Alwaysweargloveswhen
handlingassembly,otherwiseseriouspersonalinjury
may result.
1. Movechain brake lever fully rearward torelease
chainbrake.
IMPORTANT
Alwaysloosen guide bar nutsbefore turning chain
tensionadjuster,otherwise clutch coverand tensioner
willbe damaged.
2. Removetwo guide barnuts (I)and removesprocket
guard(J).
3. Removeguide bar andsaw chain if necessary.
NOTE:See“MAINTENANCEAND CARE”
instructions for guide bar, sprocket, and saw chain
maintenance.
4. Mount guide bar (G) on studs, and slide toward
sprocket to make saw chain installation easier.
5. Install saw chain (H) as shown, with cutters on top of
guidebarfacingforward.
IMPORTANT
Becertain tensioner fits into loweradjuster hole (K)
beforetighteningguidebarnuts.
NOTE
Movechainbrakeleverfullyrearwardtoinstall
sprocket guard to saw.
6. Installsprocket guard(J), and tightenguide bar nuts
(I)finger tight.
KICK GUARD® TO BAR INSTRUCTIONS
For saws with Kick Guard®P/N 2894901 and sym-
metrical or asymmetrical low-kick type guide bars.
1. Install bolt (A) in rear hole (B) of Kick Guard®and
throughfront hole(C) inguide bar.
2. IMPORTANT:Dimple in Kick Guard®(D) must
engagerecess in guidebar (E).
3. Tighten nut (F) and bolt (A) until snug. Make certain
Kick Guard®is flush against guide bar.
7. Turnsaw over and check brake bandfor correct
position around clutch drum. If brake band is not
inplace 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.
• Adjust saw chain tension, as instructed in “Adjust-
ment,ChainTension.”

9
L
ADJUSTMENT, CHAIN TENSION
IMPORTANT
Alwaysloosen guide bar nutsbefore turning chain
tensionadjuster,otherwise clutch coverand tensioner
willbe damaged.
1. Removesparkplug lead.
2. Loosen two guide bar nuts (I), if necessary.
3. Hold the bar nose up, and turn the adjuster screw (L)
clockwise until the chain touches the bottom of the
bar.
4. Tightenboth guidebar nuts withbar nose heldup.
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.
6. Keep chain properly tensioned at all times.
NOTE
Allchainsrequirefrequentadjustments.
FUEL AND LUBRICANT
NOTICE:Useofunmixed,improperlymixed,orfuelolder
than 90 days, (stale fuel), may cause hard starting, poor
performance,orsevereenginedamageandvoidtheproduct
warranty.Read andfollow instructionsin theStorage section
of this manual.
FUEL STATEMENT
GASOLINE - Use89 Octane [R+M/2](mid grade orhigher)
gasoline or gasohol known to be good quality. Gasohol may
contain up to 10% Ethyl (grain) alcohol or 15% MTBE (methyl
tertiary-butylether).Gasoholcontainingmethyl(wood)alcohol
isNOTapproved.
Two Stroke Oil - A two-stroke engine oil
meetingISO-L-EGD(ISO/CD13738)and
J.A.S.O. FC Standards must be used. Echo
brandpremiumPowerBlendTM Universal2-
Stroke Oil meets these standards. Engine
problemsduetoinadequatelubricationcaused
by failure to use an ISO-L-EGD and J.A.S.O. FC
certified oil, such as Echo premium Power
BlendTM,willvoidthe two-strokeenginewarranty.
(Emissionrelatedpartsonly are coveredfortwo
years, regardless of two-stroke oil used, per the
statement listed in the Emission Defect Warranty
Explanation.)

10
).S.U()CIRTEM(
SAGLIOSAGLIO
.laG.zo.lFretiL.cc
1
2
5
6.2
1.5
8.21
4
8
02
08
061
004
Fuel Mix Chart
50:1
Handling Fuel
WARNING DANGER
Fuel is VERY flammable. Use extreme care when mixing,
storing or handling or serious personal injury may result.
• Useanapprovedfuelcontainer.
• DONOTsmokenearfuel.
• DONOT allowflames orsparks nearfuel.
• Fuel tanks/cans may be under pressure. Always loosen fuel
caps slowly allowing pressure to equalize.
• NEVERrefuelaunitwhentheengineisHOTorRUNNING!
• DO NOT fill fuel tanks indoors. ALWAYS fill fuel tanks
outdoorsoverbareground.
• 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
oroperate unit until leakageis repaired.
• Moveatleast3m(10ft.)fromrefuelinglocationbefore
starting the engine.
MixingInstructions
1. Fillanapprovedfuelcontainerwithhalfoftherequiredamount
ofgasoline.
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 hydrocar-
bon emissions. Some states may require
theuseof automaticfuelshut-off containers
toreducefuelspillage.
Afteruse
• DO NOT store a unit with fuel in its tank. Leaks
canoccur.Returnunusedfueltoanapproved
fuelstoragecontainer.
Storage - Fuel storage laws vary by locality.
Contactyourlocalgovernmentforthelaws
affecting your area. As a precaution, store fuel in
anapproved,airtight container.Storeinawell-
ventilated,unoccupiedbuilding,awayfromsparks
andflames.
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
Storedtwo-strokefuelmayseparate.
ALWAYSshakefuelcontainerthoroughly
beforeeachuse.
IMPORTANT
Echopremium PowerBlendTM Universal 2-StrokeOil maybe
mixed at 50:1 ratio for application in all Echo engines sold in
the past regardless of ratio specified in those manuals.
CHAIN LUBRICANT
Properlubrication ofthe chain whilein operationreduces friction
between the chain and the guide bar to a minimum and assures
alonger service life.
• use bar and chain oil of high quality for this purpose.
• Donot use usedor reclaimedoil to avoidvarious oiler
problems.
• Use ECHO bar and chain oil.
• When ECHO bar and chain oil is not available:
Use motor oil, etc.
• Usebar and chainoil ofthe following grades:
SAE NO. 30 ..... in summer
SAE NO. 10 ..... in winter or when cutting resinous trees.
• Whenrefueling, also refillchain oil.
FUELTANK OILTANK
TANKINDICATION