Echo SRM-2120 Operator's Manual
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Echo SRM-2120 Operator's Manual

Grass trimmer/brushcutter
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Grass Trimmer /
Brushcutter
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.
X7507821400
© 10/24 ECHO Incorporated
Operator's
Manual
SRM-2120

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Questions and answers

DAVID THOMAS
April 7, 2025

Why does the head spins when not pressing the trigger? Is that normal?

0
1 comments:
Mr. Anderson
April 7, 2025

The Echo SRM-2120 head should not spin when the trigger is not pressed. If it does, this is not normal and may indicate a problem with the clutch mechanism. The clutch is designed to engage and spin the head only when the trigger is pressed. When the trigger is released, the engine should idle and the head should stop spinning. Have the unit inspected and repaired before further use.

This answer is automatically generated

1
Deborah Shapiro
July 4, 2025

What fuel do I buy for Echo Weedwaker SRM-2021?

0
Stanley Harrison
June 19, 2025

How do u change the line

0
Will Pancoe
April 30, 2025

My echo arm-2120 head keep tightening I losing the nut and spinning free but tighten back up I just got it and used second time

0

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Summary of Contents for Echo SRM-2120

  • 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. X7507821400 © 10/24 ECHO Incorporated...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS Introduction......................... 3 Servicing Information....................4 Parts and Serial Number..................4 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

    Scan QR codes for more information. For additional literature, including safety manuals where applicable, or questions regarding terms used in this manual, visit: https://www.echo-usa.com/manuals https://www.shindaiwa-usa.com/manuals X7507821400 © 10/24 ECHO Incorporated...

  • Page 4: Servicing Information

    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. X7507821400 © 10/24 ECHO Incorporated...

  • Page 6: International Symbols

    Ignition Sparks Near ON / OFF Fuel DO NOT Smoke Purge Bulb Near Fuel Choke Control Choke Control COLD START RUN Position Position (Choke (Choke Open) Closed) Keep Feet Away Rotating Cutting From Blade Attachment X7507821400 © 10/24 ECHO Incorporated...
  • Page 7 Keep Bystanders and Helpers Away 15 m (50 ft.) AVOID KICKOUT Keep Bystanders At Least 15 m (50 ft.) Away Beware Thrown Objects Wear Eye Protection Note: Not all symbols will appear on your unit. X7507821400 © 10/24 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. X7507821400 © 10/24 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 gas-powered products indoors or in inadequately ventilated areas. Engine exhaust contains poisonous emissions and can cause serious injury or death. X7507821400 © 10/24 ECHO Incorporated...
  • Page 12 • Keep cutting attachment below waist. • Keep all body parts away from rotating cutting attachment. Avoid Hot Surfaces • If unit is equipped with muffler, keep exhaust area clear of flammable debris. Avoid contact during and immediately after operation. X7507821400 © 10/24 ECHO Incorporated...

  • Page 13: Equipment

    Incorporated will not be responsible for the failure of cutting devices, attachments or accessories which have not been tested and approved by ECHO Incorporated. Read and comply with all safety instructions. Do not attempt to modify this product. Serious injury can ...
  • Page 14 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. X7507821400 © 10/24 ECHO Incorporated...

  • Page 15: 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. X7507821400 © 10/24 ECHO Incorporated...

  • Page 16: Description

    Locate the safety decal(s) or etching(s) on your unit. Make sure they are legible, and that you understand and follow the instructions. If any cannot be read, replacements can be ordered from your ECHO dealer. Images shown below are for example only. Those on your unit might appear slightly different.

  • Page 17: 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 / drive shaft assembly...

  • Page 18: Assembly

    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. X7507821400 © 10/24 ECHO Incorporated...

  • Page 19: Operation With Blades

    Upper/ Washer Upper/Lower blade plate adapter lower plate required, included with U and C model adapter included brushcutters, blade conversion kit or required with cutting PAS and DPAS brushcutter washer attachment attachments X7507821400 © 10/24 ECHO Incorporated...
  • Page 20 7.5 kg (16.5 lb). Do not install blades on GT (Curved Shaft) model trimmers. • Use only ECHO approved parts. Failure to use the correct parts can cause the blade to fly off. Serious injury to the operator and/or bystanders can occur.

  • Page 21: Blade Selection

    Not all blades are compatible with all trimmers. Visit www.echo- usa.com or www.shindaiwa-usa.com to find compatible blades. 3-Tooth Grass/Weed Blade may be used wherever the nylon line head is used.

  • Page 22: Fuel

    Gasoline may contain up to 10% Ethanol (grain alcohol) or 15% MTBE (methyl tertiary-butyl ether). Gasoline containing methanol (wood alcohol) is NOT approved. Use of ECHO branded fuel is recommended to extend engine life in all air-cooled two-stroke and two/four stroke hybrid engines.
  • Page 23 SRM-2120 OPERATION Two-Stroke Oil - A two-stroke engine oil, such as ECHO branded two- stroke oils, meeting ISO-L-EGD (ISO/CD 13738) and J.A.S.O. FD Standards must be used. ECHO branded two-stroke oils meet these standards. Engine problems due to inadequate lubrication caused by failure to use an ISO-L-EGD (ISO/CD 13738) and J.A.S.O.
  • Page 24 Metric Add the proper amount of two-stroke oil to gasoline. gal. fl.oz. Close container and shake to mix oil with gasoline. Add remaining gasoline, close fuel container, and remix. X7507821400 © 10/24 ECHO Incorporated...

  • Page 25: Starting Cold Engine

    Stop Switch Move stop switch button (A) forward, away from the STOP position. X7507821400 © 10/24 ECHO Incorporated...
  • Page 26 2 - 5. to three Throttle Trigger After engine warm-up, grip throttle handle and support handle. Depress the throttle trigger lockout, and gradually depress throttle trigger to increase engine RPM to operating speed. X7507821400 © 10/24 ECHO Incorporated...

  • Page 27: Starting Warm Engine

    Move stop switch button (A) forward away from the STOP position. Purge Bulb Pump purge bulb (C) until fuel is visible in the clear fuel return line. Pump bulb an additional four or five times. X7507821400 © 10/24 ECHO Incorporated...

  • Page 28: Stopping Engine

    STOP position. If engine does not stop when stop switch is moved to STOP position, close choke - COLD START position - to stall engine. Have your ECHO dealer repair stop switch before using unit again. Applications Always hold throttle handle with right hand and support handle with left hand, placing unit on right side of body.

  • Page 29: Operating Techniques - Nylon Line Head

    • Debris flows in direction of line head rotation. Change line head position to assure debris flow is directed away from operator. • Keep cutting line away from wire fences to avoid entanglement. • Operate trimmer only with cutting head below knee height. X7507821400 © 10/24 ECHO Incorporated...

  • Page 30: Operating Techniques - Metal Or Plastic Blade

    Following proper cutting techniques will prevent blade thrust. Blade thrust can be violent enough to cause the unit and/or  operator to be propelled in any direction, and possibly lose control of the unit. X7507821400 © 10/24 ECHO Incorporated...
  • Page 31 In both examples, the reactive force is in the opposite direction of blade rotation at the contact point where resistance occurs. X7507821400 © 10/24 ECHO Incorporated...

  • Page 32: Blade Cutting Problems

    • Keep blades sharp • Avoid excessive pressure during cutting • Do not exceed cutting capacity of blade • Do not use blades with damaged or missing cutting teeth • Do not tilt blade during cutting X7507821400 © 10/24 ECHO Incorporated...

  • Page 33: 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 https://www.shindaiwa-usa.com/you-can.aspx X7507821400 © 10/24 ECHO Incorporated...

  • Page 34: Maintenance Intervals

    (flex cable models) Gear housing (certain models) Grease Yearly Fuel filter Inspect / Replace* Fuel cap gasket Replace* Note: Time intervals shown are maximum. Actual use and your experience will determine the frequency of required maintenance. X7507821400 © 10/24 ECHO Incorporated...

  • Page 35: Air Filter

    • Soak heavily soiled filters in water/detergent solution to loosen dirt, then brush lightly. • Rinse with clean water and allow to dry completely before reuse. Install air filter in air filter case. Install air filter cover. X7507821400 © 10/24 ECHO Incorporated...

  • Page 36: Fuel Filter

    2012 and later equipment, only fuel supply hoses certified by EPA can be used to replace the original equipment supply hose. Fines up to $37,500 may be enforced for using a non-certified replacement part. X7507821400 © 10/24 ECHO Incorporated...

  • Page 37: Spark Plug

    This build up insulates the engine and prevents the heat from leaving. Removal of cooling passage blockages or cleaning of cooling fins is considered normal maintenance. Any failure attributed to lack of maintenance is not warranted. X7507821400 © 10/24 ECHO Incorporated...
  • Page 38 Use a plastic or nylon bristle brush to remove dirt from the cylinder fins. Remove ignition wires from clip for cleaning. Remove grass and leaves from the grid between the recoil starter and fuel tank. Assemble components in reverse order. X7507821400 © 10/24 ECHO Incorporated...

  • Page 39: Exhaust System

    (B). Never use a metal tool to scrape carbon from the exhaust port. Do not scratch the cylinder or piston when cleaning the exhaust port. Do not allow carbon particles to enter the cylinder. X7507821400 © 10/24 ECHO Incorporated...

  • Page 40: Carburetor Adjustment

    If the engine is adjusted for operation above 335 m (1,100 ft.) ASL, the carburetor must be re-adjusted when operating the engine below 335 m (1,100 ft.) ASL, otherwise severe engine damage may result. X7507821400 © 10/24 ECHO Incorporated...
  • Page 41 Turn idle screw (A): • Clockwise to increase idle speed • Counterclockwise to decrease idle speed When carburetor adjustment is completed, the cutting attachment should not move at idle, otherwise serious personal injury may result. X7507821400 © 10/24 ECHO Incorporated...

  • Page 42: Lubrication

    15 ml (0.5 oz.) of grease. Slide the flexible cable (D) back in the drive housing. DO NOT get dirt on the flex cable. Install the gear housing and shield assembly. X7507821400 © 10/24 ECHO Incorporated...

  • Page 43: Sharpening Metal Blades

    This will change the temper of the blade and could result in blade failure. File each tooth at a 30 degree angle a specific number of 30º times, e.g., four strokes per tooth. Work your way around the blade until all teeth are sharp. 30º X7507821400 © 10/24 ECHO Incorporated...

  • Page 44: Troubleshooting

    No fuel at Carburetor See your dealer cylinder Open choke Fuel at Engine Clean or replace cylinder Muffler wet Fuel mixture too air filter does not with fuel rich start Adjust carburetor See your dealer X7507821400 © 10/24 ECHO Incorporated...
  • Page 45 Cooling system dirty operation in dirty Clean properly system or plugged or dusty locations Spark Spark arrester arrester Normal wear Replace screen screen plugged Engine Internal engine does not See your dealer problem crank X7507821400 © 10/24 ECHO Incorporated...

  • Page 46: Storage

    Observe the piston location through the spark plug hole. Pull the recoil handle slowly until the piston reaches the top of its travel and leave it there. 10. Install the spark plug. Connect the spark plug lead to the spark plug. X7507821400 © 10/24 ECHO Incorporated...

  • Page 47: Specifications

    15% MTBE. Do not use alternative fuels such as E20 or E85. ISO-L-EGD (ISO/CD 13738) and J.A.S.O. M345- FD, two-stroke, air-cooled engine oil. Fuel Tank Capacity 0.38 L (12.8 US fl. oz.) Starter System Automatic rewind starter Clutch Centrifugal type X7507821400 © 10/24 ECHO Incorporated...

  • Page 48: 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 49 SRM-2120 PRODUCT REGISTRATION X7507821400 © 10/24 ECHO Incorporated...
  • Page 50 NOTES SRM-2120 NOTES X7507821400 © 10/24 ECHO Incorporated...
  • Page 51 SRM-2120 NOTES X7507821400 © 10/24 ECHO Incorporated...
  • Page 52 U94012001001 - U94012999999 U94213001001 - U94213999999 ECHO INCORPORATED 400 Oakwood Road Lake Zurich, IL 60047 www.echo-usa.com...

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