Operator’s Manual SRM-225U 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. X7732275101 © 11/2018 ECHO Inc.
TABLE OF CONTENTS SRM-225U TABLE OF CONTENTS Introduction ................................................................................................. 4 Servicing Information .................................................................................. 4 Parts/Serial Number............................................................................. 4 Service ................................................................................................. 5 ECHO Consumer Product Support ........
SRM-225U TABLE OF CONTENTS Maintenance ............................................................................................. Skill Levels ........................................................................................ Maintenance Intervals ....................................................................... Air Filter ............................................................................................. Fuel Filter ................................................................
INTRODUCTION SRM-225U INTRODUCTION Specifications, descriptions and illustrative material in this literature are as accurate as known at the time of publication, but are subject to change without notice. Illustrations may include optional equipment and accessories, and may not include all standard equipment. Read and understand all provided literature. Literature contains specifications and information for safety, operation, maintenance, storage and assembly specific to this product.
SRM-225U SAFETY Service Service of this product during the warranty period must be performed by an Authorized ECHO Service Dealer. For the name and address of the Authorized ECHO Service Dealer nearest you, ask your retailer or call: 1-800-432-ECHO (3246). Dealer information is also available on our Web Site www.echo-usa.com. When presenting your unit for Warranty service/ repairs, proof of purchase is required.
SAFETY SRM-225U 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” calls attention to an act or condition which CAN lead to serious personal injury or death if not avoided. The safety alert symbol accompanied by the word “CAUTION” calls attention to an act or condition which may lead to minor or moderate personal injury if not avoided.
SRM-225U SAFETY Symbol Description Wear Hand and Foot Protection Symbol Description L Carburetor Adjustment - Low Speed Mixture Safety/Alert Emergency Stop Hot Surface Fuel and Oil Mixture AVOID KICKOUT Keep Bystanders At Least 15 m (50 ft.
SAFETY Symbol SRM-225U Description Symbol Thrown Objects Description Direction of Blade 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 may occur. Users of this product risk injury to themselves and others if the unit is used improperly and/or safety precautions are not followed.
SRM-225U SAFETY • If you are tired or sick • If you are taking medication • If you have taken alcohol or drugs Operate unit only if you are physically and mentally well. Eye Protection ◆ ◆ 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 may be worn over safety glasses or goggles to provide protection from sharp branches or flying debris.
SAFETY SRM-225U Wear sturdy work shoes with nonskid rubber soles: • DO NOT WEAR OPEN TOED SHOES. • DO NOT OPERATE UNIT BAREFOOTED. Keep long hair away from engine and air intake. Retain hair with cap or net. Heavy protective clothing can increase operator fatigue, which may lead to heat stroke. Schedule heavy work for early morning or late afternoon hours when temperatures are cooler.
SRM-225U SAFETY • If you experience discomfort, redness, and swelling of the fingers followed by whitening and loss of feeling, consult your physician before further exposing yourself to cold and vibration. Repetitive Stress Injuries (RSI) It is believed that overusing the muscles and tendons of the fingers, hands, arms, and shoulders may cause soreness, swelling, numbness, weakness, and extreme pain in those areas.
SAFETY SRM-225U Do not operate this product indoors or in inadequately ventilated areas. Engine exhaust contains poisonous emissions and can cause serious injury or death. Read Manuals • Provide all users of this equipment with literature for instructions on safe operation. Clear The Work Area • Always clear the work area of foreign objects, and check for any hidden hazards. spectators and fellow workers must be warned, and children and animals prevented from coming nearer than 50 ft.
SRM-225U ◆ ◆ ◆ ◆ SAFETY Inspect shield for damage and ensure that shield is properly installed, and that that the cut-off knife is securely in place. Replace if either is damaged or missing. Check that the cutting attachment is firmly attached and in safe operating condition. Assure that throttle trigger, throttle trigger lockout, and stop switch all work properly. Check that handle and harness (if included) are adjusted for safe, comfortable operation. See Assembly Section for proper adjustment.
EMISSION CONTROL SRM-225U Periodically Check fuel system (fuel lines, vent, grommet, fuel tank, and fuel cap) for leaks especially if the unit is dropped. 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.
SRM-225U DESCRIPTION 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. 13 21 14 12 20 19 15 16 17 18 3 2 23 8 5 6 4 22 7 1 11 9 10 X7732275101 © 11/2018 ECHO Inc.
DESCRIPTION 1. Power Head 2. Throttle Trigger Lockout 3. Stop Switch 4. Throttle Trigger 5. Drive Shaft Assembly 6. Nylon Cutter Head 7. Cut-off Knife 8. Debris Shield with Cut-off Knife 9. U-handle 10. Hip Pad 11. Shoulder Harness 12. Debris Shield without Cut-off Knife 13. Spark Plug 14. Arm Rest SRM-225U 15. Recoil Starter Handle 16. Spark Arrestor Muffler or Spark Arrestor Muffler with Catalyst 17. Fuel Tank 18. Fuel Tank Cap 19. Choke 20. Air Cleaner 21.
SRM-225U CONTENTS CONTENTS The ECHO product you purchased has been factory pre-assembled for your convenience. 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.
ASSEMBLY SRM-225U ASSEMBLY U-Handle Installation Parts Required: 1. U-Handle, Clamp w/screws, 8 x 55 mm hex bolt, 8 mm flat washer Install upper U-Handle and bracket on lower bracket with one (1) 8 x 55 mm hex bolt (N) and (1) large circular washer. Do not tighten bolt securely until final adjustments are completed. A B D O N O 2. Loosen upper two (2) U-handle clamp screws (O), and position U-handle as shown. 3.
SRM-225U ASSEMBLY Throttle Linkage and Ignition Leads 1. Close choke and remove air filter cover. 2. Place throttle linkage (A) into adjustment fixture (B) and install wire end into large carburetor throttle swivel hole (C). Check throttle for freedom of movement and that wide open throttle / low idle extremes are adjusted properly. The throttle linkage must be adjusted by moving the adjustment nut (D). Consult with your Echo Dealer for correct adjustment procedure. 3. Tighten nut (E). 4.
ASSEMBLY SRM-225U Blade Installation You must install the U-Handle and all Blade Conversion parts shown in the following instructions before operating this unit with a metal blade, otherwise serious injury may result. Shield with cutoff knife is for use with the Nylon Line Head only. Install shield without cutoff knife when using plastic or metal blades, or serious injury may result. Note: Includes U-Handle, and necessary blade conversion parts.
SRM-225U 2. 3. Align holes in shield plate (I), shield (K), and bottom of gear case flange. Install (3) bolts (L) and (3) lock nuts (M). ASSEMBLY I L K Tighten all shield hardware. M Install Blade Parts Required: Upper Plate with pilot, Lower Plate, 10 mm Nut with Left Hand threads, 2 x 25 mm Cotter Pin, Blade. 1. Install upper plate with pilot (A) on splined PTO shaft, pilot side out. 2. Install Blade (M) on upper plate pilot.
ASSEMBLY 3. 4. SRM-225U Align hole in upper plate with notch in gear housing, and insert Locking Tool (G) to prevent splined shaft from turning. Tighten 10 mm nut securely. Insert Cotter Pin (C) in hole in PTO shaft, and bend pin legs around shaft counterclockwise to retain 10 mm nut. A G M E D C Never reuse a cotter pin - install a new cotter pin each time a blade is installed or replaced. 5. Remove locking tool (G).
SRM-225U ASSEMBLY Nylon Line Head Installation Parts Required: Nylon Line Head. Wear Gloves or personal injury may result: ◆ Cutoff knife is sharp. ◆ Gearcase and surrounding area may be hot. 1. Make sure shield with cutoff knife (H) and shield plate are properly installed, and line head plate (A) is installed on splined PTO shaft (F). G J H 2. Align notch in edge of shield and hole in line head plate with notch in edge of gear housing and insert head locking tool (G). 3.
OPERATION SRM-225U Note: Your nylon line head may appear different than nylon line head shown. To Advance Trimmer Line See Maintenance Section for nylon line replacement. Note: To advance trimmer line, tap trimmer head against the ground while the head is turning at normal operating speed. Balance and Adjust Unit 1. Loosen harness clamp screw. 2. Put on harness and attach unit to harness. 3. Slide harness clamp up (A) or down until unit balances with head approximately 50-75 mm (2-3 in.
SRM-225U OPERATION Engine exhaust IS HOT, and contains Carbon Monoxide (CO), a poison gas. Breathing CO can cause unconsciousness, serious injury, or death. Exhaust can cause serious burns. ALWAYS position unit so that exhaust is directed away from your face and body. 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.
OPERATION Pro Maxi-Cut Grass/Weed Blade Upper Plate & Flat Washer SRM-225U Tri-Cut Grass/ Weed Blade Metal Grass / Weed Blade Metal Brush / Clearing Blades Upper/Lower Blade Plates Hex Nut New Cotter Pin *ANSI standards require brush cutters be equipped with a barrier bar or restrictive harness. U-Handle ensures a higher safety factor. Do Not install blades on GT (Curved Shaft) model trimmers. • Arbor diameter of upper blade plate must match arbor diameter of blades.
SRM-225U OPERATION 8 Tooth Weed/Grass Blade is designed for grass, garden debris and thick weeds up to 19 mm (0.75 in.) diameter. DO NOT use this blade for brush or heavy woody growth. 80 Tooth Brush Blade is designed for cutting brush and woody growth up to 13 mm (0.5 in.) diameter. 22 Tooth Clearing Blade is designed for dense thickets and saplings up to 64 mm (2.5 in.) diameter. A trimmer-brushcutter with a metal blade can cause serious injuries if handled improperly.
OPERATION SRM-225U Use Shoulder/Waist Harness Use of the shoulder/waist harness is recommended for ALL Trimmer/ brushcutter use, not just blade operation. The shoulder/waist harness when used in a trimming operation with nylon line head suspends the trimmer from the operator's shoulder and reduces operator fatigue. During blade operation, the same fatigue reduction is achieved.
SRM-225U OPERATION Fuel Requirements Gasoline - Use 89 Octane [R+M/2] (mid grade or higher) gasoline known to be good quality. 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 2-stroke and 2/4-stroke hybrid engines.
OPERATION ◆ ◆ ◆ ◆ ◆ ◆ ◆ ◆ ◆ ◆ SRM-225U Use an approved fuel container. Mark fuel containers as containing 2-stroke mixture fuel. DO NOT smoke near fuel. DO NOT allow flames or sparks near fuel. Fuel tanks/cans may be under pressure. Always loosen fuel caps slowly allowing pressure to equalize. NEVER refuel a unit when the engine is HOT or RUNNING! DO NOT fill fuel tanks indoors. ALWAYS fill fuel tanks outdoors over bare ground. DO NOT overfill fuel tank. Wipe up spills immediately.
SRM-225U OPERATION • Empty the fuel tank prior to storing the unit. Return unused fuel to an approved fuel storage container. Storage - Fuel storage laws vary by locality. Contact your local government for the laws affecting your area. As a precaution, store fuel in an approved, airtight container. Store in a well-ventilated, unoccupied building, away from sparks and flames. Stored fuel ages. Do not mix more fuel than you expect to use in 30 days, 90 days when a fuel stabilizer is added.
OPERATION 2. SRM-225U Choke Move choke lever (B) to COLD START ( ) position. 3. Purge Bulb B C Pump purge bulb (C) until fuel is visible and flows freely in the clear fuel tank return line. Pump bulb an additional 4 or 5 times. Note: Lightly place knee on drive shaft to stabilize unit during starting. Do not apply excessive downward force or damage to unit can occur. 4. Recoil Starter Lay the unit on a flat area and keep movable attachment parts clear of all obstacles.
SRM-225U OPERATION Starting Warm Engine The starting procedure is the same as Cold Start except DO NOT close the choke, and do not hold throttle trigger fully depressed. The attachment should not move at idle, otherwise serious personal injury may result. Note: If attachment moves, readjust carburetor according to “Carburetor Adjustment” instructions in this manual or see your ECHO Dealer. 1. Stop Switch Move stop switch button (A) forward away from the STOP position. 2.
OPERATION SRM-225U Stopping Engine 1. Throttle Release throttle and allow engine to return to idle before shutting off engine. 2. A Stop Switch Move stop switch button (A) backward to 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 dealer repair stop switch before using unit again. Applications Nylon line heads may be used for trimming, scything, edging, and scalping of grass and light weeds.
SRM-225U OPERATION • Operate trimmer only with cutting head below knee height. Reaction Forces Push or Pull - Kickback or Kickout During normal use, operating a brushcutter with a circular metal blade can produce sudden strong reaction forces that are difficult to control. Strong reaction forces can cause a loss of balance or loss of control of the equipment, resulting in serious injury to operator and bystanders.
OPERATION SRM-225U • Using the correct blade for the cutting job • Using properly sharpened blades • Applying consistent, even force to the blade during the cut • Avoiding obstacles and ground hazards • Using extra care when cutting harder materials such as extremely dry brush, saplings, and small trees • Cutting from a stable, secure position Blade Cutting Problems Binding - Blades may bind in the cut if dull or forced.
SRM-225U MAINTENANCE MAINTENANCE 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. Allow unit to cool before performing service. Wear gloves to protect hands from sharp edges and hot surfaces.
MAINTENANCE SRM-225U Maintenance Intervals MAINTENANCE PROCEDURE COMPONENT/SYSTEM SKILL LEVEL Daily or Before Use Air Filter Choke Shutter Inspect/Clean* 1 3 Fuel System Inspect Cooling System Inspect/Clean Recoil Starter Rope Inspect/Clean* Screws/Nuts/Bolts Inspect/Tighten/Replace* 2 1 Every Refuel Fuel System Inspect 3 1 3 Months Air Filter Fuel Filter Fuel Cap Gasket Spark Plug Muffler Spark Arrestor Replace* Inspect* 1 Inspect/Clean/Replace* Cylinder Exhaust Port Inspect/Clean
SRM-225U MAINTENANCE Air Filter Level 1. Parts Required: Tune-Up Kit 1. Close choke (COLD START [ ] position). This prevents dirt from entering the carburetor throat when the air filter is removed. Brush accumulated dirt from air cleaner area. 2. Remove air filter cover. Brush dirt from inside cover. 3. Replace filter if it is damaged, fuel soaked, very dirty, or the rubber sealing edges are deformed. • Lightly brush debris from filter.
MAINTENANCE SRM-225U Do not damage fuel line while removing fuel filter from tank. 3. Remove the filter from the line and install the new filter. Note: Federal EPA regulations require all model year 2012 and later gasoline powered engines produced for sale in the United States to be equipped with a special low permeation fuel supply hose between the carburetor and fuel tank.
SRM-225U MAINTENANCE Overheating and engine seizure can occur when: • Air intakes are blocked, preventing cooling air from reaching the cylinder. • Dust and grass build up on the outside of the cylinder. 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. 1. Remove spark plug lead. 2. Remove air cleaner cover (A). 3.
MAINTENANCE 4. Use a brush to remove dirt from the cylinder fins. 5. Remove ignition wires from clip for cleaning. 6. Remove grass and leaves from the grid between the recoil starter and fuel tank. 7. Assemble components in reverse order. SRM-225U Exhaust System Spark Arrestor Screen Level 2. Parts Required: Spark Arrestor Screen, Gasket 1. Remove spark plug lead and engine cover. 2. Place piston at Top Dead Center (TDC) to prevent carbon/dirt from entering cylinder.
SRM-225U 3. 4. MAINTENANCE Remove spark arrestor screen cover (C), gaskets (D), (E), and screen (F), from muffler body. F Clean carbon deposits from muffler components. E Note: When cleaning carbon deposit, be careful not to damage the catalytic element inside muffler. 5. Replace screen if it is cracked, plugged, or has holes burned through. 6. Assemble components in reverse order. D C Exhaust Port Cleaning Level 2. Parts Required: As needed: Heat Shield 1.
MAINTENANCE SRM-225U 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. 4. Inspect heat shield, and replace if damaged. 5. Install heat shield and muffler. 6. Tighten muffler mounting bolts (or nuts) to 90-110 kgf•cm (80-95 in•lbf). 7. Install engine cover and attach spark plug lead. 8. Start engine, and warm to operating temperature. 9.
SRM-225U 1. Check idle speed and reset if necessary. If a tachometer is available, idle speed screw (A) should be set to the specifications found on “Specifications” page of this manual. Turn idle screw (A) clockwise to increase idle speed; counterclockwise to decrease idle speed. MAINTENANCE A A When carburetor adjustment is completed, the cutting attachment should not move at idle, otherwise serious personal injury may result. X7732275101 © 11/2018 ECHO Inc.
MAINTENANCE SRM-225U Lubrication Level 1. Parts Required: Lithium Based Grease. Gear Case Gear cases without grease plug (A) do not require lubrication. 1. Clean all loose debris from gear case. 2. Remove plug (A) and check level of grease. 3. Add grease if necessary. DO NOT over-fill. A Drive Shaft 1. 2. 3. 4. 46 Loosen screw (B) and remove locating screw (C). Pull gear case and shield from drive shaft housing.
SRM-225U MAINTENANCE Nylon Line Head Disassembly Instructions Note: For normal use, Speed Feed® head disassembly is not necessary. However, if circumstances require disassembly, follow these instructions. 1. Press top of locking tabs (A) on both sides of Speed Feed® head to release cover (B) from eyelet carrier (C). 2. Remove cover from eyelet carrier. A C B Nylon Line Replacement Wear gloves or personal injury may result: ◆ Cutoff knife is sharp. ◆ Gearcase and surrounding area may be hot. 1.
MAINTENANCE 3. Insert one end of trimmer line into an eyelet, and push line equal distance through trimmer head. 4. Hold trimmer head while turning knob clockwise to wind line onto spool until about 13 cm (5 in.) of each line remains exposed. SRM-225U Trimmer head is now fully loaded and ready for operation. When the wear indicators located at the bottom of the Speed-Feed® head are worn smooth, or if holes appear, replacement of the cover or the entire Speed-Feed® head is required.
SRM-225U MAINTENANCE Sharpening Metal Blades Several styles of metal blades are approved for use on the Brush Cutter. The 8-tooth blade can be sharpened during normal maintenance. The clearing blade and 80-tooth blade require professional service. Before sharpening, CLOSELY inspect blade for cracks (look at the bottom of each tooth and the center mounting hole closely), missing teeth and bending. If ANY of these problems are discovered, replace the blade.
TROUBLESHOOTING 3. SRM-225U After sharpening teeth, check each tooth radius for evidence of a square (sharp) corner. Use the round (rat tail) file to renew the radius. TROUBLESHOOTING Fuel vapors are extremely flammable and may cause fire and/or explosion. Never test for ignition spark by grounding spark plug near cylinder plug hole, otherwise serious personal injury may result.
SRM-225U STORAGE ENGINE PROBLEM TROUBLESHOOTING CHART Problem Engine runs, but dies Check Status Remedy Air filter Normal wear Clean or replace Fuel filter Fuel filter dirty Contaminants or residue in fuel Replace filter or replace fuel Fuel vent Fuel vent plugged Contaminated fuel Clean or replace Spark plug Plug dirty or worn Normal wear Clean and adjust or replace Carburetor Improper adjustment Vibration Adjust Cooling system Cooling system dirty or plugged Extended operation i
SPECIFICATIONS SRM-225U Do not store in enclosure where fuel fumes may accumulate or reach an open flame or spark. 2. Place the stop switch in the “OFF” position. 3. Remove accumulation of grease, oil, dirt and debris from exterior of unit. 4. Perform all periodic lubrication and services that are required. 5. Tighten all the screws and nuts. 6. Drain fuel tank completely. Press purge bulb 6-7 times to remove remaining fuel from carburetor then drain the tank again.
SRM-225U SPECIFICATIONS MODEL SRM-225U Spark Plug NGK BPM8Y (BPMR 8Y in Canada) Gap 0.65 mm (0.026 in.) Fuel Mixed (Gasoline and Two-stroke Oil) Gasoline/Oil Ratio 50:1 Gasoline Use 89 Octane unleaded. Do not use fuel containing methyl alcohol, more than 10% ethyl alcohol or 15% MTBE. Do not use alternative fuels such as E15 or E85. Oil ISO-L-EGD (ISO/CD 13738) and J.A.S.O. M345FD, two-stroke, air-cooled engine oil. Fuel Tank Capacity 420 mL (14.2 US fl. oz.
PRODUCT REGISTRATION SRM-225U PRODUCT REGISTRATION Thank you for choosing ECHO Power Equipment 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, Inc. 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.
SRM-225U X7732275101 © 11/2018 ECHO Inc.
U01914001001 - U01914999999 ECHO INCORPORATED 400 Oakwood Road Lake Zurich, IL 60047 www.echo-usa.
