Echo CS-4920 Operator's Manual
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Echo CS-4920 Operator's Manual

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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.
X7503352100
© 09/2022 ECHO Incorporated
Operator's
Manual
CS-4920
Chainsaw

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Summary of Contents for Echo CS-4920

  • Page 1 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. X7503352100 © 09/2022 ECHO Incorporated...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS Introduction ......................... 3 Servicing Information....................3 Parts and Serial Number..................3 Service ....................... 4 ECHO Consumer Product Support ..............4 Product Registration................... 4 Additional Literature ................... 4 Safety ......................... 5 Manual Safety Symbols and Important Information ........... 5 International Symbols..................

  • Page 3: Introduction

    SERVICING INFORMATION Parts and Serial Number 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

    Register your ECHO equipment online at www.echo-usa.com or by filling out the product registration sheet included in this manual. Registering your product confirms warranty coverage and provides a direct link to ECHO if we find it necessary to contact you.

  • Page 5: Safety

    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. X7503352100 © 09/2022 ECHO Incorporated...

  • Page 6: International Symbols

    Both of the operator’s hands Fuel and Oil must be used to Mixture operate the chainsaw. Hot Surface Chain Oil Fill X7503352100 © 09/2022 ECHO Incorporated...
  • Page 7 Chain Oiler Operation Adjustment Choke Control “COLD START” Position (Choke Closed) Purge Bulb Choke Control “RUN” Position (Choke Open) STOP / Decompression Momentary Device STOP Switch Note: Not all symbols will appear on your unit. X7503352100 © 09/2022 ECHO Incorporated...

  • Page 8: 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. X7503352100 © 09/2022 ECHO Incorporated...
  • Page 9 Gloves also provide protection against cuts and scratches, cold environments, and reduce the transmission of machine vibration to your hands. Hearing and 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 10 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 11 Never touch wires directly or indirectly, otherwise serious injury or death can result. Do not operate this product indoors or in inadequately ventilated areas. Engine exhaust contains poisonous emissions and can cause serious injury or death. X7503352100 © 09/2022 ECHO Incorporated...

  • Page 12: Rules For Safe Operation

    With a basic understanding of kickback, you can reduce or eliminate the element of Kickback Danger Zone surprise. Sudden surprise contributes to accidents. X7503352100 © 09/2022 ECHO Incorporated...

  • Page 13: Correct Use Of Chain Brake

    • If the brake is tripped by kickback reaction, the chain will stop immediately. Release the throttle to avoid possible damage to the engine or clutch. • Do not attempt to operate the Locked engine with the brake locked. X7503352100 © 09/2022 ECHO Incorporated...
  • Page 14 Chain brakes have been designed and tested to comply with international safety standards as follows: USA: ANSI Standard B175.1 Safety Requirement for chainsaws Canada: CSA Standard Z62.1, Z62.3 X7503352100 © 09/2022 ECHO Incorporated...
  • Page 15 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. X7503352100 © 09/2022 ECHO Incorporated...
  • Page 16 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. X7503352100 © 09/2022 ECHO Incorporated...
  • Page 17 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. X7503352100 © 09/2022 ECHO Incorporated...
  • Page 18 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. X7503352100 © 09/2022 ECHO Incorporated...

  • Page 19: Emission 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. X7503352100 © 09/2022 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 the saw chain. • CLUTCH - Turns drive sprocket when engine rpm is fast enough to provide the power needed for cutting. X7503352100 © 09/2022 ECHO Incorporated...

  • Page 22: Contents

    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 23 Install bolt (A) in rear hole (B) of optional Kick Guard through front hole (C) in guide bar. IMPORTANT: Dimple (D) in optional Kick Guard must engage recess (E) in guide bar. Securely tighten nut (F) and bolt (A). X7503352100 © 09/2022 ECHO Incorporated...
  • Page 24 Install sprocket guard over guide bar studs. Ensure chain tension adjuster pin (H) fits into the guide bar adjuster hole (G), brake band (J) is positioned around clutch drum (F). Tighten sprocket guard nuts finger tight. X7503352100 © 09/2022 ECHO Incorporated...
  • Page 25 Adjusting Chain Tension Always loosen sprocket guard nuts before turning the chain tension adjuster, otherwise the sprocket guard and tensioner will be damaged. Remove air cleaner cover and disconnect spark plug lead. X7503352100 © 09/2022 ECHO Incorporated...
  • Page 26 Tighten guide bar nuts to 20-23 N•m (200 to 230 kgf•cm, 175-200 lbf•in). DO NOT over-tighten nuts. Damage to saw may result. Assemble components in reverse order. Keep chain properly tensioned at all times. Note: All chains require frequent adjustments. X7503352100 © 09/2022 ECHO Incorporated...

  • Page 27: Operation

    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 28 AVOID inhaling oil mists or vapors. ◆ ECHO branded 2-stroke oils may be mixed at 50:1 ratio for application in all ECHO engines sold in the past regardless of ratio specified in those manuals. Handling Fuel Fuel is VERY flammable. Use extreme care when mixing, storing or handling, or serious personal injury will result.
  • Page 29 • 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. X7503352100 © 09/2022 ECHO Incorporated...

  • Page 30: Chain Lubricant

    Oil tank cap • 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 refill chain oil. X7503352100 © 09/2022 ECHO Incorporated...

  • Page 31: Starting Cold Engine

    Move chain brake lever fully FORWARD to LOCK chain brake before starting. Fill the fuel tank with fuel mixture. Do not over fill. Fill the chain oil tank with lubricant. Do not over fill. X7503352100 © 09/2022 ECHO Incorporated...
  • Page 32 Do not allow recoil handle to snap back against the case. If engine does not start after 5 pulls, repeat instructions. Do not increase engine speed while chain brake is locked. Severe brake damage will result. X7503352100 © 09/2022 ECHO Incorporated...

  • Page 33: Starting A Hard To Start Engine

    Press throttle trigger lockout (D) down while grasping throttle trigger (C). Securely hold the chainsaw as shown and pull starter handle. When engine starts, immediately release throttle trigger, otherwise, severe brake damage may occur. X7503352100 © 09/2022 ECHO Incorporated...

  • Page 34: Starting Warm Engine

    Running 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 ECHO your dealer. X7503352100 © 09/2022 ECHO Incorporated...

  • Page 35: Stopping

    Note: If engine does not stop, pull choke control knob out fully to stop engine. Note: Return the unit to your authorized dealer to check and repair stop switch before starting the engine again. X7503352100 © 09/2022 ECHO Incorporated...

  • Page 36: Checking Chain Tension

    This chainsaw 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. X7503352100 © 09/2022 ECHO Incorporated...
  • Page 37 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. X7503352100 © 09/2022 ECHO Incorporated...
  • Page 38 Keep chain properly tensioned during operation to prevent ◆ the chain from jumping out of the guide bar rail slot and damaging metal engine parts. X7503352100 © 09/2022 ECHO Incorporated...
  • Page 39 5 cm (2 in.) will act as a One-third tree diameter 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. X7503352100 © 09/2022 ECHO Incorporated...
  • Page 40 Always use both hands. Don’t cut with the saw overhead or aligned vertically with your body. If the saw should kick back, you may not have enough control to prevent possible injury. X7503352100 © 09/2022 ECHO Incorporated...

  • Page 41: Guide Bar And Chain Combinations

    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. Guide Bar and Chain Combinations The following combinations are recommended for model CS-4920: Guide Bar Saw Chain ECHO Part No.

  • Page 42: Kick Guard Tm

    To purchase an optional Kick Guard contact your 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. For the name of the Shindaiwa dealer nearest you, call 1-877-986-7783 or on the web at www.shindaiwa-usa.com.

  • Page 43: Maintenance

    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 X7503352100 © 09/2022 ECHO Incorporated...

  • Page 44: Maintenance Intervals

    Air Filter Replace * Oil Filter Inspect / Replace * Fuel Filter Inspect * Fuel Cap Gasket Inspect * Spark Plug Inspect / Clean / Replace * Muffler Spark Arrester Inspect / Clean / Replace * X7503352100 © 09/2022 ECHO Incorporated...

  • Page 45: Air Filter

    * Replacement is recommended based on the finding of damage or wear during inspection. Air Filter Check before every use. CLOSE choke ( Release air cleaner cover latch (A). Pull air cleaner cover (B) back and up to remove. X7503352100 © 09/2022 ECHO Incorporated...

  • Page 46: Spark Plug

    • After refueling, make sure fuel does not leak from around fuel feed lines, fuel grommet or fuel tank cap. • In case of fuel leakage there is a danger of fire. Stop using the machine immediately and request your dealer to inspect or replace. X7503352100 © 09/2022 ECHO Incorporated...

  • Page 47: Fuel Filter

    Automatic Oiler • The discharge volume of the automatic oiler is adjusted to approximately 7 mL/min at 7000 RPM, prior to shipment from factory. • Always check oil discharge when in use. X7503352100 © 09/2022 ECHO Incorporated...

  • Page 48: Oil Filter

    Clean before using. Clean the groove of the guide bar (A) with a small screwdriver. Clean oil holes (B) with a wire. Invert guide bar periodically. Clean the guide bar mount area before installing the guide bar. X7503352100 © 09/2022 ECHO Incorporated...

  • Page 49: Sprocket

    Cooling System Cleaning • Check periodically. • Clogged fins will result in poor engine cooling. Remove the air cleaner cover, the air filter, and the spark plug lead. Remove the three bolts (A) from the cylinder cover. X7503352100 © 09/2022 ECHO Incorporated...

  • Page 50: Spark Arrester Muffler

    California, Minnesota, New Jersey and Maine, are required to be equipped with a spark arrester. This requirement also applies to all U.S. Forest Service lands. In some of these areas, the spark arrester system must be certified per USDA Forest Service Regulation SAE J335. X7503352100 © 09/2022 ECHO Incorporated...

  • Page 51: Spark Arrester Screen

    Every unit is run at the factory and the carburetor is set in compliance with Emission Regulations. In addition, the carburetor is equipped with “H” (High Speed) and “L” (Low Speed) needle adjustment limiters that prevent settings outside acceptable limits. X7503352100 © 09/2022 ECHO Incorporated...
  • Page 52 CCW 1/8 turn and repeat acceleration. Continue adjustment until smooth acceleration results. Check idle speed and reset if necessary as described in item 5. If a tachometer is available idle speed should be set to value listed on technical data page. X7503352100 © 09/2022 ECHO Incorporated...

  • Page 53: Setting The Saw Chain

    • Drive link serves to remove sawdust from the groove of the guide bar. Keep the lower edge of the drive link sharp where indicated. Sharpen lower edge X7503352100 © 09/2022 ECHO Incorporated...
  • Page 54 • One-fifth of the file diameter remains above cutter edge. • Be sure to round off the front edge Depth gauge tool of the depth gauge. X7503352100 © 09/2022 ECHO Incorporated...
  • Page 55 • 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. X7503352100 © 09/2022 ECHO Incorporated...

  • Page 56: Troubleshooting

    Clean or replace runs, but Fuel filter Contaminants Replace filter or dies Fuel filter dirty or residue in fuel replace fuel Engine Fuel vent Contaminated Fuel vent Clean or replace does not plugged fuel accelerate properly X7503352100 © 09/2022 ECHO Incorporated...

  • Page 57: Storage

    • Inspect and adjust every part of the chainsaw. • Completely clean every part and repair if necessary. • Apply thin coating of oil on metal parts to prevent rust. • Remove chain and guide bar. X7503352100 © 09/2022 ECHO Incorporated...

  • Page 58: Specifications

    Do not lend or rent your chainsaw 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 dealer, or go to www.echo-usa.com. SPECIFICATIONS Model CS-4920 Length 437 mm (17.2 in.)
  • Page 59 Chain tensioner Side access system Guide bar 16, 18, 20 in. Saw chain 20BPX Front hand guard, Rear hand guard, Anti- vibration device, Spiked bumper, Throttle Standard features control lockout, Chain catcher, Spark arrester muffler X7503352100 © 09/2022 ECHO Incorporated...

  • Page 60: 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 61 CS-4920 PRODUCT REGISTRATION X7503352100 © 09/2022 ECHO Incorporated...
  • Page 62 NOTES CS-4920 NOTES X7503352100 © 09/2022 ECHO Incorporated...
  • Page 63 CS-4920 NOTES X7503352100 © 09/2022 ECHO Incorporated...
  • Page 64 C92115001001 - C92115999999 ECHO INCORPORATED 400 Oakwood Road Lake Zurich, IL 60047 www.echo-usa.com...

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