Echo CS-303T Operator's Manual
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Echo CS-303T Operator's Manual

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Operator's
Chain Saw
The engine exhaust from this product contains chemicals
known to the State of California to cause cancer, birth defects,
or other reproductive harm.
Read and understand all provided literature before
use. Failure to do so could result in serious injury.
Note: This product complies with CAN ICES-2/NMB-2.
Note: In Canada, this chain saw is designated for tree service and is only to
be used by a trained operator.
X7503209108
© 10/20 ECHO Incorporated
Manual
CS-303T

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  • Page 1 Failure to do so could result in serious injury. Note: This product complies with CAN ICES-2/NMB-2. Note: In Canada, this chain saw is designated for tree service and is only to be used by a trained operator. X7503209108 © 10/20 ECHO Incorporated...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS Introduction......................... 3 Servicing Information....................3 Parts/Serial Number................... 3 Service ....................... 4 ECHO Consumer Product Support ..............4 Product Registration................... 4 Additional Literature ................... 4 Packing List ........................ 4 Safety ......................... 5 Rules For Safe Operation .................. 5 Correct Use Of Chain Brake ................

  • Page 3: Introduction

    Genuine ECHO Parts and Assemblies for your ECHO products are available only from an Authorized ECHO Dealer. When you do need to buy parts always have the Model Number and Serial Number of the unit with you. For future reference write them in the space provided below.

  • Page 4: Service

    Due to packaging restrictions, some 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. Power Head...

  • Page 5: Safety

    With a basic understanding of kickback, you can reduce or eliminate the element of surprise. Kickback Danger Zone Sudden surprise contributes to accidents. X7503209108 © 10/20 ECHO Incorporated...

  • Page 6: Correct Use Of Chain Brake

    Testing The Brake • Start the engine on a solid level Locked surface and run at a fast idle until warm. • Hold the saw firmly by the handles and accelerate the engine to a fast idle. X7503209108 © 10/20 ECHO Incorporated...
  • Page 7 Chain brakes have been designed and tested to comply with international safety standards as follows: USA: ANSI Standard B175.1 Safety Requirement for chain saws Canada: CSA Standard Z62.1, Z62.3 X7503209108 © 10/20 ECHO Incorporated...
  • Page 8 The impact should lock the chain brake. When checking the operation of the automatic chain brake, use a soft surface substance like wood to absorb the impact so the chain is not damaged. X7503209108 © 10/20 ECHO Incorporated...
  • Page 9 (For example, if improper tools are used to remove the flywheel or if an improper tool is used to hold the flywheel in order to remove the clutch, structural damage to the flywheel could occur and could subsequently cause the flywheel to burst.) X7503209108 © 10/20 ECHO Incorporated...
  • Page 10 Always wear proper safety clothing to protect your lower  body from sharp saw chain and hot muffler. Always keep exhaust area clear of flammable debris during  transportation or when storing, otherwise serious property damage or personal injury may result. X7503209108 © 10/20 ECHO Incorporated...
  • Page 11 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. X7503209108 © 10/20 ECHO Incorporated...

  • Page 12: Personal Condition And Safety Equipment

    Eye protection that meets ANSI Z87.1 or CE requirements ◆ must be worn whenever you operate the unit. For additional safety, a full-face shield can be worn over ◆ safety glasses or goggles to provide protection from sharp branches or flying debris. X7503209108 © 10/20 ECHO Incorporated...
  • Page 13 Gloves also provide protection against cuts and scratches, cold environments, and reduce the transmission of machine vibration to your hands. Hearing/Ear Protection ECHO recommends wearing personal protective equipment whenever unit is used. Breathing Protection Operators who are sensitive to dust or other common airborne allergens may need to wear a dust mask to prevent inhaling these materials while operating unit.
  • Page 14 To reduce the risk of serious or fatal injury, persons with pacemakers should consult with their physician and the pacemaker manufacturer before operating this machine. In the absence of such information, ECHO does not recommend the use of this machine by anyone who has a pacemaker.
  • Page 15 All over head electrical conductors and communications wires can have electricity flow with high voltages. This unit is not insulated against electrical current. Never touch wires directly or indirectly, otherwise serious injury or death can result. X7503209108 © 10/20 ECHO Incorporated...

  • Page 16: International Symbols

    Both of the operator’s hands must be used to Fuel and Oil Mixture operate the chain saw Hot Surface Chain Oil Fill X7503209108 © 10/20 ECHO Incorporated...
  • Page 17 Chain Brake Operation Adjustment Choke Control “COLD START” Position (Choke Closed) Purge Pump Choke Control “RUN” Position (Choke Open) De-Compression STOP / Momentary Device STOP Switch Note: Not all symbols will appear on your unit. X7503209108 © 10/20 ECHO Incorporated...

  • Page 18: Manual Safety Symbols And Important Information

    Note: This enclosed message provides tips for use, care and maintenance of the unit. CIRCLE AND SLASH SYMBOL This symbol means the specific action shown is prohibited. Ignoring these prohibitions can result in serious or fatal injury. X7503209108 © 10/20 ECHO Incorporated...

  • Page 19: Emissions Control (Exhaust & Evaporative)

    The 50 or 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. X7503209108 © 10/20 ECHO Incorporated...

  • Page 20: Description

    Locate the safety decal(s) on your unit. Make sure the decal(s) is legible and that you understand and follow the instructions on it. If a decal cannot be read, a new one can be ordered from your ECHO dealer. Safety label is for example only. Your label my appear slightly different.
  • Page 21 CHAIN BRAKE - Stops the saw chain. DRIVE SPROCKET - Drives saw chain. CLUTCH - Turns drive sprocket when engine rpm is fast enough to provide the power needed for cutting. X7503209108 © 10/20 ECHO Incorporated...

  • Page 22: Preparation For Use

    Install bolt (A) in rear hole (B) of Kick Guard and through front hole (C) in guide bar. IMPORTANT: Dimple (D) in Kick Guard must engage recess (E) in guide bar. Securely tighten nut (F) and bolt (A). X7503209108 © 10/20 ECHO Incorporated...
  • Page 23 Guide Bar Studs (E). Make sure Chain Tension Adjuster Pin (G) fits into the Guide Bar Adjuster Hole (H), and the Brake Band (J) is positioned around Clutch Drum (K). Tighten Sprocket Guard Nuts (A) finger tight. X7503209108 © 10/20 ECHO Incorporated...
  • Page 24 Adjust saw chain tension, as instructed in “Adjustment, Chain Tension”. Adjusting Chain Tension Always loosen sprocket guard nuts before turning the chain tension adjuster, otherwise the sprocket guard and tensioner will be damaged. Disconnect spark plug lead. Loosen Sprocket Guard Nuts (A). X7503209108 © 10/20 ECHO Incorporated...

  • Page 25: Operation

    Fuel Diesel fuels and 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 diesel or alternative fuels can cause performance...
  • Page 26 NOT approved. Use of ECHO branded fuel is recommended to extend engine life in all air-cooled 2-stroke and 2/4-stroke hybrid engines. Two Stroke Oil - A two-stroke engine oil, such as ECHO branded 2-stroke oils, meeting ISO-L-EGD (ISO/CD 13738) and J.A.S.O. FD Standards must be used.
  • Page 27 Mixing Instructions Stored fuel ages. Do not mix more fuel than you expect to use in 30 days, 90 days when a fuel stabilizer is added. X7503209108 © 10/20 ECHO Incorporated...
  • Page 28 • Empty the fuel tank prior to storing the unit. Return unused fuel to an approved fuel storage container. Stored two-stroke fuel can separate. ALWAYS shake fuel container thoroughly before each use. Used oil and gasoline, and soiled towels are hazardous waste materials. Disposal laws vary by locality. X7503209108 © 10/20 ECHO Incorporated...

  • Page 29: Chain Lubricant

    Metal cutters can also create sparks if the cutter strikes rocks, metal, or other hard objects. Contact local fire authorities for laws or regulations regarding fire prevention requirements. X7503209108 © 10/20 ECHO Incorporated...

  • Page 30: Starting Cold Engine

    Do not over fill. Move Stop Switch (A) FORWARD to “RUN” position. Push Purge Pump (B) 8 times. Pull Choke Control Knob (C) all the way out. (Choke position (CLOSED [ ] choke position). X7503209108 © 10/20 ECHO Incorporated...
  • Page 31 10. Pull starter handle to start the engine. Note: Do not pull starter rope out to maximum position. Do not allow recoil handle to snap back against the casing. If engine does not start after 5 pulls, repeat instructions. X7503209108 © 10/20 ECHO Incorporated...

  • Page 32: Starting Hard To Start Engine

    Fill the fuel tank with fuel mixture. Do not over fill. Fill the chain oil tank with lubricant. Do not over fill. Move Stop Switch (A) FORWARD to “RUN” position. Push Purge Pump (B) 8 times. X7503209108 © 10/20 ECHO Incorporated...
  • Page 33 Never use fast idle throttle latch for cutting. ◆ Use the fast idle throttle latch only in starting. ◆ Do not increase engine speed when chain brake is locked. ◆ Severe brake damage can occur. X7503209108 © 10/20 ECHO Incorporated...
  • Page 34 10. Pull starter handle to start the engine. Note: Do not pull starter rope out to maximum position. Do not allow recoil handle to snap back against the casing. If engine does not start after 5 pulls, repeat instructions. X7503209108 © 10/20 ECHO Incorporated...

  • Page 35: Starting Warm Engine

    Make sure the bar and chain are free from any obstruction when starting the chain saw. Move chain brake lever fully FORWARD to LOCK chain brake before starting. Confirm there is fuel and chain oil in the tanks. Move Stop Switch (A) forward to “RUN” position. X7503209108 © 10/20 ECHO Incorporated...

  • Page 36: Running

    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. X7503209108 © 10/20 ECHO Incorporated...

  • Page 37: Stopping

    Note: If engine does not stop, pull Choke Control Knob (C) CLOSED all the way out ( ] choke position) Return the unit to your authorized dealer to check and repair stop switch before starting the engine again. X7503209108 © 10/20 ECHO Incorporated...

  • Page 38: Checking Chain Tension

    This chain saw is designed for cutting wood. Do not cut ◆ metal, plastic or any non-wood material. Wear suitable hearing ◆ protection such as earmuffs or earplugs to protect against objectionable or uncomfortable loud noises. X7503209108 © 10/20 ECHO Incorporated...
  • Page 39 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. X7503209108 © 10/20 ECHO Incorporated...
  • Page 40 A falling tree can seriously damage anything it may hit - a car, a house, a fence, a power line, or another tree. There are ways to make a tree fall where you want it, so first decide where that is! X7503209108 © 10/20 ECHO Incorporated...
  • Page 41 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. X7503209108 © 10/20 ECHO Incorporated...
  • Page 42 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. X7503209108 © 10/20 ECHO Incorporated...

  • Page 43: Chain And Guide Bar Combination

    Kick Guard (Optional) To purchase an optional Kick Guard contact your ECHO dealer. For the name of the ECHO dealer nearest you, Call: 1-800-432-ECHO (3246) or on the web at www.echo-usa.com Guide Bar (Low-kickback) Replacement guide bars.

  • Page 44: Saw Chain

    Only use saw chain designated as, “LOW-KICKBACK,” that meets ANSI B175.1 or CSA Z62.1, .3 Standard when tested on the representative sample of chain saws below 3.8 C.I.D., and ECHO guide bar specified. MAINTENANCE Moving parts can amputate fingers or cause severe injuries.

  • Page 45: Skill Levels

    Level 1 = Easy to do. Common tools may be required. Level 2 = Moderate difficulty. Some specialized tools may be required. Level 3 = See your dealer. Click HERE or go to http://www.echo-usa.com/products/maintenance-kit HERE https://www.shindaiwa-usa.com/you-can.aspx For information about maintenance kits.

  • Page 46: Carburetor Adjustment

    New engines must be operated a minimum duration of two tanks of fuel break-in before carburetor adjustments can be made. During the break-in period your engine performance will increase and exhaust emissions will stabilize. Idle speed can be adjusted as required. X7503209108 © 10/20 ECHO Incorporated...
  • Page 47 When starting, idling adjustment speed should be adjusted to prevent the saw chain from moving. When you experience trouble with the carburetor, contact your dealer. X7503209108 © 10/20 ECHO Incorporated...

  • Page 48: Lifting Hook

    Install air filter cover. Spark Plug • Check periodically. • The standard spark gap is 0.65 mm (0.026 in.). • Fastening torque:13-17 N•m (112-150 in•lbf). 0.65 mm (0.026 in.) X7503209108 © 10/20 ECHO Incorporated...

  • Page 49: Check Fuel System

    Automatic Oiler • The discharge volume of the automatic oiler is adjusted to approximately 4 mL/min at 7000 r/ min, prior to shipment from factory. • Always check oil discharge when in use. X7503209108 © 10/20 ECHO Incorporated...

  • Page 50: Oil Filter

    Clean before using. Clean the groove (A) of the guide bar with a small screwdriver. Clean oil holes (B) with a wire. Invert guide bar periodically. Clean the bar mount area before installing of the bar. X7503209108 © 10/20 ECHO Incorporated...

  • Page 51: Sprocket

    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. Cooling System Cleaning • Check periodically. • Clogged fins will result in poor engine cooling. Remove muffler and starter. X7503209108 © 10/20 ECHO Incorporated...

  • Page 52: Spark Arrestor Muffler

    Clean carbon deposits from muffler components. Note: When cleaning carbon deposit, be careful not to damage the catalytic element inside muffler. Replace screen if it is cracked, plugged, or has holes burned through. X7503209108 © 10/20 ECHO Incorporated...

  • Page 53: Exhaust Port Cleaning

    Stop engine, and re-tighten mounting nuts to 9-11 N•m (80-95 in•lbf). 10. Install muffler cover. 11. Start engine and check for exhaust leaks between muffler and cylinder head. Stop engine if leak is found and correct problem before operating chain saw. X7503209108 © 10/20 ECHO Incorporated...

  • Page 54: Setting The Saw Chain

    Sharpen lower edge Setting Saw Chain • For setting saw chain, round file (4.0 mm [5/32 in.] diam.) and flat file are used. • Push file as shown. 30° Keep this angle X7503209108 © 10/20 ECHO Incorporated...
  • Page 55 • Properly filed cutters are shown in illustration. • When setting of the chain is 55° finished, soak it in oil and wash away filings completely before using. 30° Top plate Side plate angle filing angle X7503209108 © 10/20 ECHO Incorporated...
  • Page 56 • If the saw chain becomes soiled with resin, for instance, clean it with Parallel kerosene and soak in it oil. Depth gauge To sharpen other chains, follow chain manufacturer’s instructions. X7503209108 © 10/20 ECHO Incorporated...

  • Page 57: Troubleshooting

    Clean or replace runs, but dirty dies Contaminants Fuel filter Replace filter or Fuel filter or residue in dirty replace fuel fuel Engine does not Fuel vent Contaminated acceler- Fuel vent Clean or replace plugged fuel properly X7503209108 © 10/20 ECHO Incorporated...

  • Page 58: Storage

    Serious personal injury can result. • 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. X7503209108 © 10/20 ECHO Incorporated...

  • Page 59: Specifications

    Do not lend or rent your chain saw without the Operator’s Manual. Note: • For future reference, you should keep this Operator’s Manual. • If this Operator’s Manual becomes illegible or is lost, please contact your ECHO dealer, or go to www.echo-usa.com. SPECIFICATIONS Model CS-303T Length 260 mm (10.2 in.)
  • Page 60 Guard Link Saw Chain, Front Hand Guard/ Kickback safety features Chain Brake Lever, Chain Brake, Optional Kick Guard This spark ignition system complies with the Canadian standard ICES-002. * Technical data subject to change without notice. X7503209108 © 10/20 ECHO Incorporated...
  • Page 61 CS-303T NOTES NOTES X7503209108 © 10/20 ECHO Incorporated...

  • Page 62: Product Registration

    Please go to http://www.echo-usa.com/Warranty/Register-Your-ECHO to register your new product on-line. It's FAST and EASY! NOTE: your information will never be sold or misused by ECHO, Incorporated. Registering your purchase enables us to contact you in the unlikely event of a service update or product recall, and verifies your ownership for warranty consideration.
  • Page 63 CS-303T PRODUCT REGISTRATION X7503209108 © 10/20 ECHO Incorporated...
  • Page 64 C67215001001 - C67215999999 ECHO INCORPORATED 400 Oakwood Road Lake Zurich, IL 60047 www.echo-usa.com...

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