Echo CS-305 User manual

X7503204801 X750006731
06/05
Chain Saw
InstructionManual
MODEL : CS-305
WARNING DANGER
Readrulesforsafeoperationandinstructionscarefully.ECHOprovidesanInstruction
ManualandaSafety Manual.Bothmustbereadandunderstoodforproperandsafe
operation.

2
RULES FOR SAFE OPERATION
A. Kickback Safety Precaution for Chain Saw Users
1. With a basic understanding of kickback, you
canreduceoreliminatetheelementofsurprise.
Suddensurprise contributestoaccidents.
2.Keep a good firm grip on the saw with both
hands, the right hand on the rear handle, and
theleft handon thefront handle,when theen-
gineisrunning.Useafirmgripwiththumbsand
fingersencirclingthechainsawhandles.Afirm
grip will help you reduce kickback and main-
taincontrolofthe saw.Don’t’letgo.
3. Make sure that the area in which you are cut-
ting is free from obstructions. Do not let the
noseof theguide barcontactalog,branch,or
anyotherobstruction whichcould behitwhile
youare operatingthesaw.
4. Cutathigh enginespeeds.
5. Donotoverreachorcutaboveshoulderheight.
6. Follow manufacturer’s sharpening and main-
tenanceinstructions forthesawchain.
7. Onlyusereplacement barsandchains speci-
fiedbythemanufacturerortheequivalent.
B. Other Safety Precautions
1. Donotoperateachainsawwithone hand!Se-
rious injury to the operator, helpers, bystand-
ers,or anycombinationofthesepersons may
resultfromone-handedoperation.Achainsaw
isintended fortwo-handed use.
2. Do not operate a chain saw when you are fa-
tigued.
3. Usesafetyfootwear;snug-fittingclothing;pro-
tectivegloves;andeye,hearingandheadpro-
tectiondevices.
4. Usecautionwhenhandlingfuel.Movethechain
sawatleast3m(10 feet)fromthe fuelingpoint
beforestarting theengine.
5. Donotallowotherpersonstobenearthechain
sawwhenstartingorcuttingwiththechainsaw.
Keepbystandersand animals outof the work
area.
6. Donotstart cuttinguntil youhaveaclearwork
area,securefooting,andaplannedretreatpath
fromthe fallingtree.
Copyright©2004 ByEcho,Incorporated
All Rights Reserved.
WARNING!
KICKBACKmay occurwhenthenoseortipofthe
guide bar touches an object, or when the wood
closesin andpinchesthe sawchain inthecut.
Tip contact in some cases may cause a lightning
fastreverse REACTION,Kickingtheguidebar up
andbacktowards theoperator. Pinchingthesaw
chainalong thetopoftheguide barmay pushthe
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.

3
CONTENTS
Page
Rulesfor SafeOperation..................................................................................................2
TechnicalData .................................................................................................................4
Emission Data .................................................................................................................5
Description ......................................................................................................................5
Part Location and Description.........................................................................................6
PreparationforUse..........................................................................................................7
Fueland Lubricant............................................................................................................8
Operation.......................................................................................................................10
CuttingInstructions .........................................................................................................12
KickBack Safety Features..............................................................................................15
Maintenanceand Care...................................................................................................16
Chain and Guide Bar Combinations...............................................................................19
SettingtheSaw Chain....................................................................................................20
Troubleshooting..............................................................................................................21
Storage..........................................................................................................................22
Correct Use of Chain Brake ...........................................................................................23
ServicingInformation......................................................................................................24
7. Keepallpartsof yourbodyawayfromthesaw
chainwhentheengineis running.
8. Before you start the engine, make sure that
thesaw chainis notcontactinganything.
9. Carrythechain sawwiththeenginestopped,
the guide bar and saw chain to the rear, and
themufflerawayfromyourbody.
10.Donotoperate achainsaw thatisdamaged,
improperly adjusted, or not completely and
securely assembled. Be sure that the saw
chain stops moving when the throttle control
trigger is released.
11. Shutofftheenginebeforesettingthe chainsaw
down.
12.Useextremecaution whencuttingsmall size
brushand saplingsbecause slendermaterial
may catch the saw chain and be whipped to-
wardyou orpullyouoffbalance.
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 freeof oilor
fuelmixture.
15.Operatethechain sawonlyin well-ventilated
areas.
16.Do not operate a chain saw in a tree unless
youhavebeen specificallytrained todoso.
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-
wheelinordertoremove theclutch,structural
damagetotheflywheelcouldoccurandcould
subsequentlycausethe flywheeltoburst.)
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.Donotremovethe sparkar-
restorscreen.

4
TECHNICAL DATA
* Technical data subject to change without notice.
IMPORTANT
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5
DESCRIPTION
TheECHOproductyoupurchasedhasbeenfactorypre-assembledforyourconvenience.Duetopackaging
restrictions, guide bar and saw chain installation and other assembly may be necessary.
Afteropeningthe carton,checkfor damage. Immediatelynotifyyourretailer orECHODealer ofdamagedor
missing parts. Use the contents list to check for missing parts.
CONTENTS
1 - PowerHead
1 - GuideBar
1 - KickGuard
1 - Hex Head Bolt
1 - HexNut
1 - SawChain
1 - InstructionManual
1 - SafetyManual
1 - WarrantyRegistrationCard
1 - LimitedWarrantyStatement
1 - T-Wrench
1 - Echo Power Blend TM 2-stroke oil sample
EMISSION CONTROL
IMPORTANTENGINEINFORMATION
ENGINEFAMILY: 4EXHS.0334RA DISPLACEMENT: 30.1 CC
EMISSIONCOMPLIANCEPERIOD :300HRS.
THISENGINEMEETSU.S.EPAPAHSE 2EMISSIONREGULA-
TIONS FOR SMALL NONROAD ENGINE. REFER TO OWNER'S
MANUAL FOR MAINTENANCE SPECIFICATIONS AND
ADJUSTMENTS.
EMISSION DATA
PRODUCT EMISSION DURABILITY
The300 hour emission durabilitycompliance period isthe time span selected by the manufacturercertifying
theengineemissionsoutputmeetsapplicableemissionsregulations,providedthatapprovedmaintenance
proceduresare followed as listedin the MaintenanceSection of this manual.
EPA Phase 2
The emission control system for these engines are
EM(EngineModification).
An Emission Control Label islocated onthe engine. (These areEXAMPLES ONLY, information on label
variesbyengineFAMILY).

6
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
21. Choke
CS-305
PART LOCATION AND DESCRIPTION
12
3
4
5
7
8
9
11
14
15
16
17
18
6
10
12
13
19
13
20
21
21

7
PREPARATION FOR USE
WARNING DANGER
SawChainissharp!Alwaysweargloveswhenhandling
assembly, otherwise serious personal injury may result.
GUIDE BAR AND SAW CHAIN
• Removetwo guide barnuts (I)andremove sprocketguard
(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
guidebarfacingforward.
IMPORTANT
Becertaintensioner(K)fitsintoloweradjusterholebefore
tighteningguidebarnuts.
NOTE
Movechainbrakeleverfullyrearwardtoinstallsprocket
guardtosaw.
• Installsprocket guard(J), and tighten guide barnuts finger
tight.
• Adjust saw chain tension, as instructed in “Adjustment,
ChainTension.”
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
throughfront hole(C)in guidebar.
2. IMPORTANT:Dimple inKick Guard®(D)must engage
recess in guide bar (E).
3. Tighten nut (F) and bolt (A) until snug. Make certain Kick
Guard®isflushagainst guide bar.
G
H
J
K
I

8
L
ADJUSTMENT, CHAIN TENSION
• Removesparkplug 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.
• Tightenboth guide barnuts withbar 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.
• 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
Allchainsrequirefrequentadjustments.
FUEL AND LUBRICANT
FUEL STATEMENT
GASOLINE - Use89 Octane[R+M/2](midgrade 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 meeting ISO-L-EGD
(ISO/CD13738) and J.A.S.O.FCStandards must beused.
EchobrandpremiumPowerBlendTM Universal 2-Stroke Oil
meetsthesestandards.Engine problems duetoinadequate
lubricationcaused by failure to use an ISO-L-EGDand J.A.S.O.
FC certified oil, such as Echo premium Power BlendTM, will void
the two-stroke engine warranty. (Emission related parts only
arecoveredfortwoyears,regardlessoftwo-strokeoilused,per
the statement listed in the Emission Defect Warranty Explana-
tion.)
IMPORTANT
Echopremium PowerBlendTM Universal 2-Stroke Oilmay be
mixed at 50:1 ratio for application in all Echo engines sold in
the past regardless of ratio specified in those manuals.
50
Oil
Gasoline

9
FUELTANK OILTANK
TANKINDICATION
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
containerthoroughly beforeeachuse.
IMPORTANT
Spilled fuel is a leading cause of hydrocarbon emissions.
Some states may require the use of automatic fuel shut-
offcontainersto reduce fuelspillage.Contactyour ECHO
dealerfororderinginformation.
CHAIN LUBRICANT
Properlubrication ofthe chainwhile inoperation reducesfriction
between the chain and the guide bar to a minimum and assures
alonger servicelife.
• Use bar and chain oil of high quality for this purpose.
• Donot useused or reclaimedoil toavoid variousoiler
problems.
• Use ECHO bar and chain oil.
• When ECHO bar and chain oil is not available:
Use motor oil, etc.
• Usebar andchain oil ofthe followinggrades:
SAE NO. 30 ..... in summer
SAE NO. 10 ..... in winter or when cutting resinous trees.
• Whenrefueling, alsorefill chain oil.
MixingInstructions
1. Fillanapprovedfuelcontainerwithhalfoftherequired
amountofgasoline.
2. Addthe proper amountof 2-stroke oil togasoline.
3. Close container and shake to mix oil with gasoline.
4. Addremaininggasolineandremix.
5. Installfuelcontainer capand wipeany spilledfuel from
containerandsurroundingarea.
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SAGLIOSAGLIO
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1
2
5
6.2
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4
8
02
08
061
004
Fuel Mix Chart
50:1

10
Securely hold the saw.
OPERATION
B
C
A
WHEN THE ENGINE IS COLD
WARNING DANGER
Make sure bar and chain are not touching anything when
starting the saw.
• Movechain brake leverfully forwardtoengage chainbrake
beforestarting.
• Fill the fuel tank with fuel.
• Fill the chain oil tank with lubricant.
• Turnswitch (A) to“RUN” position(I).
• Pull choke (B) all the way out (closed position).
• Push purge bulb (C) 10 times.
• 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)
• Pullstarter handleagain.
NOTE
If engine does not start after 5 pulls, repeat instructions.
WHEN THE ENGINE IS HARD TO START
WARNING DANGER
Clutchengagesandchainmayrotatewhenengineisstarted
with throttle control latch engaged. Never use the throttle
controllatchforcutting.Use only whenstartingtheengine.
• Press throttle control lockout down, squeeze throttle
trigger, and push in throttle control latch.
• Pullstarter 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.