Echo CS-4910 Operator's Manual
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Echo CS-4910 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.
X7503314200
© 09/20 ECHO Incorporated
Manual
CS-4910

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Summary of Contents for Echo CS-4910

  • Page 1 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. X7503314200 © 09/20 ECHO Incorporated...
  • Page 2 TABLE OF CONTENTS CS-4910 TABLE OF CONTENTS X7503314200...

  • Page 3: Servicing Information

    CS-4910 INTRODUCTION INTRODUCTION SERVICING INFORMATION Parts/Serial Number X7503314200...

  • Page 4: Packing List

    PACKING LIST CS-4910 Service ECHO Consumer Product Support Product Registration Additional Literature PACKING LIST X7503314200...

  • Page 5: Rules For Safe Operation

    CS-4910 SAFETY SAFETY Rules For Safe Operation KICKBACK may occur when the nose or tip of the guide bar touches an object, or when the wood closes in and pinches the saw chain in the cut. X7503314200...
  • Page 6 SAFETY CS-4910 Correct Use Of Chain Brake Chain Brake Operation Testing The Brake X7503314200...
  • Page 7 CS-4910 SAFETY Do not allow the saw to tip forward in order to avoid damage to the chain. If the chain does not stop immediately, return the saw to your authorized dealer for repair. X7503314200...
  • Page 8 SAFETY CS-4910 ANSI Standard B175.1 and CSA Z62.1.3 stipulate that the brake shall stop the chain 0.12 seconds at an engine speed of 13,500 r/min. It is the responsibility of the owner/ operator to ensure that the brake is serviced, adjusted...
  • Page 9 CS-4910 SAFETY Other Safety Precautions X7503314200...
  • Page 10 SAFETY CS-4910 Chain saws shall be used in accordance with the operating instructions and safety precautions listed in the operator's manual(s). It shall be the responsibility of the owner to see that such instructions and precautions are given to every operator who uses the saw.
  • Page 11 CS-4910 SAFETY Moving parts can amputate fingers or cause severe injuries. Keep hands, clothing and loose objects away from all openings. ALWAYS stop engine, disconnect spark plug, and make sure all moving parts have come to a complete stop before removing obstructions, clearing debris, or servicing unit.

  • Page 12: Personal Condition And Safety Equipment

    SAFETY CS-4910 Personal Condition and Safety Equipment Cancer and Reproductive Harm www.P65Warnings.ca.gov The muffler or catalytic muffler and surrounding cover may become extremely hot. Always keep clear of exhaust and muffler area, otherwise serious personal injury might occur. Users of this product risk injury to themselves and others if the unit is used improperly and/or safety precautions are not followed.
  • Page 13 CS-4910 SAFETY Hand Protection Hearing/Ear Protection Breathing Protection Proper Clothing X7503314200...
  • 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 CS-4910 SAFETY Repetitive Stress Injuries (RSI) 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.

  • Page 16: International Symbols

    SAFETY CS-4910 International Symbols Symbol Description Symbol Description X7503314200...
  • Page 17 CS-4910 SAFETY Symbol Description Symbol Description STOP STOP Not all symbols will appear on your unit. X7503314200...
  • Page 18 SAFETY CS-4910 Manual Safety Symbols and Important Information The safety alert symbol accompanied by the word “DANGER” calls attention to an act or condition which WILL lead to serious personal injury or death if not avoided. The safety alert symbol accompanied by the word “WARNING”...

  • Page 19: Emission Control (Exhaust & Evaporative)

    CS-4910 EMISSION CONTROL EMISSION CONTROL (EXHAUST & EVAPORATIVE) CARB And EPA Emissions Control Information An Emission Control Label Product Emission Durability (Emission Compliance Period) X7503314200...
  • Page 20 DESCRIPTION CS-4910 DESCRIPTION X505009450 X7503314200...
  • Page 21 CS-4910 DESCRIPTION CHAIN SAW TERMS FAST IDLE THROTTLE LATCH CHAIN BRAKE DRIVE SPROCKET X7503314200...

  • Page 22: Preparation For Use

    DESCRIPTION CS-4910 CLUTCH Preparation For Use Saw chain is sharp! Always wear gloves when handling assembly, otherwise serious personal injury may result. Instructions to Install Optional Kick Guard to Bar rear IMPORTANT: Guide Bar and Saw Chain Installation / Removal...
  • Page 23 CS-4910 DESCRIPTION Improper sprocket guard assembly can result in serious injury, and will cause severe saw damage if unit is started. Never start or operate saw if brake band is not in place on clutch drum. Always check chain brake operation after replacing sprocket guard.
  • Page 24 DESCRIPTION CS-4910 Adjust Chain Tension Always loosen sprocket guard nuts before turning the chain tension adjuster, otherwise the sprocket guard and tensioner will be damaged. X7503314200...

  • 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 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 27 CS-4910 OPERATION Inspect for fuel leakage. If fuel leakage is found, do not ◆ start or operate unit until leakage is repaired. Move at least 3 m (10 ft.) from refueling location before ◆ starting the engine. Gasoline vapor is heavier than air, and can travel along the ground to nearby sources of ignition such as electrical motors, pilot lights, and hot or running engines.
  • Page 28 OPERATION CS-4910 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. Units equipped with a momentary STOP Switch automatically return to RUN position. Engine can start unintentionally. Always...

  • Page 29: Chain Lubricant

    CS-4910 OPERATION Chain Lubricant Moving parts can amputate fingers or cause severe injuries. Keep hands, clothing and loose objects away from all openings. Always stop engine, disconnect spark plug, and make sure all moving parts have come to a complete stop before removing obstructions, clearing debris, or servicing unit.

  • Page 30: Starting Cold Engine

    OPERATION CS-4910 Operation of this equipment may create sparks that can start fires around dry vegetation. This unit is equipped with a spark arrestor to prevent discharge of hot particles from the engine. Metal cutters can also create sparks if the cutter strikes rocks, metal, or other hard objects.
  • Page 31 CS-4910 OPERATION After starting the engine, immediately squeeze and then ◆ release throttle trigger to release fast idle throttle latch, otherwise severe brake damage may occur. Never use fast idle throttle latch for cutting. ◆ Use the fast idle throttle latch only in starting.

  • Page 32: Starting Warm Engine

    OPERATION CS-4910 Starting Warm Engine Make sure the bar and chain are free from any obstruction when starting the chain saw. X7503314200...
  • Page 33 CS-4910 OPERATION Running The saw chain should not move at idle, otherwise serious personal injury may result. Stopping X7503314200...

  • Page 34: Checking Chain Tension

    OPERATION CS-4910 Checking Chain Tension Do not operate with a loose chain. Chain Lubrication Test Cutting Instructions General This chain saw is designed for cutting wood. Do not cut ◆ metal, plastic or any non-wood material. Wear suitable hearing ◆...
  • Page 35 CS-4910 OPERATION 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...
  • Page 36 OPERATION CS-4910 Sap from palm trees may corrode metal parts unless proper saw maintenance is performed. Make sure to clean metal parts from palm sap immediately after use. Do not run a chainsaw not under cutting load at wide open ◆...
  • Page 37 CS-4910 OPERATION X7503314200...
  • Page 38 OPERATION CS-4910 Limbing Bucking X7503314200...

  • Page 39: Chain And Guide Bar Combination

    CS-4910 OPERATION Chain And Guide Bar Combination Guide Bar Saw Chain Use of replacement saw chain and/or guide bar other than that specified, or operation without the optional Kick Guard place, may cause severe kickback resulting in serious injury. Chain and guide bar gauge size must be identical. Use Bar/Chain combinations shown in table above.

  • Page 40: Guide Bar

    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 41: Skill Levels

    CS-4910 MAINTENANCE Operating a poorly maintained unit can result in serious injuries to operator or bystanders. Always follow all maintenance instructions as written, otherwise serious personal injury can result. The use of emission control components other than those specifically designed for this unit is a violation of federal law.
  • Page 42 MAINTENANCE CS-4910 REQ’D MAINTENANCE COMPONENT/SYSTEM SKILL PROCEDURE LEVEL Every Refuel 3 Months Yearly IMPORTANT NOTE MAINTENANCE PROCEDURE NOTES: X7503314200...

  • Page 43: Carburetor Adjustment

    CS-4910 MAINTENANCE Carburetor Adjustment Engine Break-In High Altitude Operation If the engine is adjusted for operation above 1,100 feet ASL, the carburetor must be re-adjusted when operating the engine below 1,100 feet ASL, otherwise severe engine damage can result. X7503314200...

  • Page 44: Air Filter

    MAINTENANCE CS-4910 When carburetor adjustment is completed, the saw chain should not move at idle, otherwise serious personal injury can result. 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.

  • Page 45: Check Fuel System

    CS-4910 MAINTENANCE Check Fuel System Fuel Filter Do not damage fuel line while removing fuel filter from tank. X7503314200...
  • Page 46 MAINTENANCE CS-4910 Automatic Oiler Oil Filter Guide Bar X7503314200...

  • Page 47: Cooling System Cleaning

    CS-4910 MAINTENANCE Sprocket Some tree saps 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 Spark Arrestor Muffler X7503314200...

  • Page 48: Spark Arrestor Screen

    MAINTENANCE CS-4910 Spark Arrestor Screen Carbon deposits in muffler will cause drop in engine output and overheating. Spark arrestor screen must be checked periodically. Setting The Saw Chain Preset Tie Strap Left Hand Cutter Drive Link Tie Strap Plate Guard...
  • Page 49 CS-4910 MAINTENANCE Setting Saw Chain X7503314200...
  • Page 50 MAINTENANCE CS-4910 X7503314200...

  • Page 51: Troubleshooting

    CS-4910 TROUBLESHOOTING To sharpen other chains, follow chain manufacturer’s instructions. TROUBLESHOOTING ENGINE PROBLEM TROUBLESHOOTING CHART Problem Check Status Cause Remedy X7503314200...
  • Page 52 TROUBLESHOOTING CS-4910 ENGINE PROBLEM TROUBLESHOOTING CHART Problem Check Status Cause Remedy Fuel vapors are extremely flammable and can cause fire and/or explosion. Never test for ignition spark by grounding spark plug near cylinder plug hole, otherwise serious personal injury can result.

  • Page 53: Storage After Use

    CS-4910 STORAGE STORAGE Storage After Use Units equipped with a Momentary STOP Switch automatically return to RUN position. Engine can start unintentionally. Always remove spark plug lead from spark plug before assembling or performing maintenance procedures. Serious personal injury can result.

  • Page 54: Specifications

    SPECIFICATIONS CS-4910 SPECIFICATIONS MODEL CS-4910 X7503314200...
  • Page 55 CS-4910 NOTES NOTES X7503314200...
  • Page 56 PRODUCT REGISTRATION CS-4910 PRODUCT REGISTRATION Thank you for choosing ECHO Power Equipment FAST EASY ECHO Incorporated, Product Registration, PO Box 1139, Lake Zurich IL 60047. X7503314200...
  • Page 57 CS-4910 PRODUCT REGISTRATION X7503314200...
  • Page 58 NOTES CS-4910 NOTES X7503314200...
  • Page 59 CS-4910 NOTES X7503314200...
  • Page 60 ECHO INCORPORATED www.echo-usa.com...

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