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Echo SRM-251U Operator's Manual

Grass trimmer / brush cutter
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Grass Trimmer/Brush Cutter
Operator's Manual
MODEL
Read rules for safe operation and instructions carefully. ECHO provides an Operator's
Manual and a Safety Manual. Both must be read and understood for proper and safe
operation.
X7502022000
SRM - 251U
WARNING
DANGER
X750008170
04/05

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Summary of Contents for Echo SRM-251U

  • Page 1 Grass Trimmer/Brush Cutter Operator's Manual MODEL SRM - 251U WARNING DANGER Read rules for safe operation and instructions carefully. ECHO provides an Operator's Manual and a Safety Manual. Both must be read and understood for proper and safe operation. X750008170 X7502022000 04/05...

  • Page 2: Table Of Contents

    NTRODUCTION Welcome to the ECHO family. This ECHO product was designed and manufactured to provide long life and on-the-job dependability. Read and understand this manual and the SAFETY MANUAL you found in the same package. You will find both easy to use and full of helpful operating tips and SAFETY messages.

  • Page 3: Safety

    RASS RIMMER RUSH UTTER PERATOR ANUAL AFETY MANUAL SAFETY SYMBOLS AND IMPORTANT INFORMATION Throughout this manual and on the product itself, you will find safety alerts and helpful, informational messages preceded by symbols or key words. The following is an explanation of those symbols and key words and what they mean to you.

  • Page 4: Personal Condition And Safety Equipment

    Wear no-slip, heavy-duty work gloves to improve your grip on the handle. Gloves also reduce the transmission of machine vibration to your hands. Hearing Protection ECHO recommends wearing hearing protection whenever unit is used. Proper Clothing Wear snug fitting, durable clothing;...
  • Page 5 RASS RIMMER RUSH UTTER PERATOR ANUAL Repetitive Stress Injuries 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. Certain repetitive hand activities may put you at a high risk for developing a Repetitive Stress Injury (RSI).

  • Page 6: Equipment Check

    Use only ECHO approved attachments. Serious injury may result from the use of a non-approved attachment combination. ECHO, INC. will not be responsible for the failure of cutting devices, attachments or accessories which have not been tested and approved by ECHO. Read and comply with all safety instructions listed in this manual and safety manual.

  • Page 7: Description

    Locate the safety decals on your unit. Make sure the decals are legible and that you understand and follow the instruc- tions on them. If a decal cannot be read, a new one can be ordered from your ECHO dealer. See PARTS ORDERING instructions for specific information.
  • Page 8 1. POWER HEAD - Includes the Engine, Clutch, Fuel System, Ignition System and Recoil Starter. 2. THROTTLE TRIGGER LOCKOUT - This lever must be held during starting. Operation of the throttle trigger is prevented unless throttle trigger lockout lever is engaged. 3.

  • Page 9: Contents

    The ECHO product you purchased has been factory pre-assembled for your convenience. Due to packaging restrictions, shield installation and other 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.

  • Page 10: Assembly

    SSEMBLY PLASTIC SHIELD INSTALLATION (Nylon line operation) Tools Required: Screwdriver, Locking Tool Parts Required: Plastic Debris Shield, Shield Plate, three (3) 5 x 16 mm screws. WARNING DANGER The plastic shield is for use with the Nylon Line Head only. Install Metal Shield when using plastic or metal blades, or serious injury may result.

  • Page 11: Blade Operation

    You must install the U-Handle and all Blade Conversion parts shown in the following instructions before operating this unit with metal blades, otherwise serious injury may result. NOTE Model SRM-251U includes U-Handle, 8-tooth blade, and neces- sary blade conversion parts. Blades must be selected for type of cutting being performed. See page 14, "Blade Selection."...

  • Page 12: U-Handle Installation

    Install Blade Tools Required: Locking Tool, 17x19 mm Wrench . Parts Required: Upper Plate w/ 20 mm pilot, Lower Plate, 10 mm Nut w/ L.H. threads, 2 x 25 mm Cotter Pin, Blade. 1. Install upper plate (D) on splined PTO shaft, pilot side down. Blade installation requires Upper Plate (D) with 20 mm pilot.

  • Page 13: Throttle Linkage And Ignition Leads

    RASS RIMMER RUSH UTTER PERATOR ANUAL THROTTLE LINKAGE AND IGNITION LEADS 1. Close choke and remove air filter cover. 2. Loosen cable retainer plate screw (A) and pivot retainer plate down. 3. Place inner cable in large hole of carburetor swivel (B) 4.

  • Page 14: Operation

    PERATION OPERATION WITH BLADES WARNING DANGER The type of Blade used MUST be matched to the type and size of material cut. An improper or dull blade can cause serious personal injury. Blades MUST be sharp. Dull blades increase the chance of kick-out and injury to yourself and bystanders.

  • Page 15: Fuel

    Emission Defect Warranty Explanation.) IMPORTANT Echo premium Power Blend Universal 2-Stroke Oil 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 WARNING DANGER Fuel is VERY flammable.

  • Page 16: Starting Cold Engine

    Mixing Instructions 1. Fill an approved fuel container with half of the required amount of IMPORTANT gasoline. Stored fuel ages. Do not mix more fuel 2. Add the proper amount of 2-stroke oil to gasoline. than you expect to use in thirty (30) 3.

  • Page 17: Starting Warm Engine

    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) away from the STOP position. 2. Primer Pump primer bulb (C) until fuel is visible and flows freely in the clear fuel tank return line.

  • Page 18: Stopping Engine

    ECHO Service Dealer for maintenance. To help you decide whether you want to DO-IT-YOURSELF or have the ECHO Dealer do it, each maintenance task has been graded. If the task is not listed, see your ECHO Dealer for repairs.

  • Page 19: Maintenance Intervals

    RASS RIMMER RUSH UTTER PERATOR ANUAL MAINTENANCE INTERVALS r e l t n i i l y t r o C / t t I - f l e t n i l i F r e t C / t C / t l i F r e t...

  • Page 20: Air Filter

    AIR FILTER Level 1. Tools Required: Cleaning brush 25 or 50 mm (1 or 2 in.) Parts Required: 90008 REPOWER AIR & FUEL FILTER 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 the air cleaner area.

  • Page 21: Spark Plug

    RASS RIMMER RUSH UTTER PERATOR ANUAL SPARK PLUG Level 2. Tools Required: T-Wrench, feeler gauge, soft metal brush. Parts Required: REPOWER Tune-Up Kit P/N 90074 IMPORTANT Use only NGK BPM-8Y spark plug (BPMR-8Y in Canada) otherwise severe engine damage may occur. 1.

  • Page 22: Exhaust System

    1. Remove spark plug lead (A). 2. Remove air filter cover (B). 3. Remove one (1) muffler cover screw and muffler cover (C). 4. Remove two (2) screws and engine cover (D). IMPORTANT DO NOT use a metal scraper to remove dirt from the cylinder fins. 5.

  • Page 23: Carburetor Adjustment

    The cylinder exhaust port must be inspected and cleaned of excess carbon every 3 months or 90 hours of operation in order to maintain this engine within the emissions durability period. ECHO strongly recommends that you return your unit to your ECHO dealer for this important maintenance service. CARBURETOR ADJUSTMENT...
  • Page 24 Before Adjustment Check that: • Air filter is clean and properly installed. • Spark arrestor screen and muffler are free of carbon. • Nylon line head with lines trimmed to 8 in. is installed, or • Blade is installed. Initial Adjustment 1.

  • Page 25: Lubrication

    1. Loosen two (2) screws (B) and remove center locating screw (C). Pull gear box and shield from drive shaft housing. 2. Pull flexible cable from the drive shaft housing, wipe clean and recoat with a thin coating[15 ml (1/2 oz.)] of ECHO LUBE grease.

  • Page 26: Nylon Line Replacement

    NYLON LINE REPLACEMENT Level 1. Parts Required: ECHO 2.4mm (0.095 in.) Nylon Trimmer Line 12m (40 feet [two 20 ft. sections]) Echomatic Pro Trimmer Head 1. Do not push spool in. Hold drum and turn spool clockwise until peg clicks and disappears from hole. Pull spool out of drum.

  • Page 27: Sharpening Metal Blades

    PERATOR ANUAL SHARPENING METAL BLADES Three styles of metal blades are approved for use on the ECHO 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.

  • Page 28: Troubleshooting

    ROUBLESHOOTING t l i l f f t l i t l i t l i t l i t r i t r i WARNING DANGER Fuel vapors are extremely flammable and may cause fire and/or explosion. Never test for ignition spark by ground- ing spark plug near cylinder plug hole, otherwise serious personal injury may result.

  • Page 29: Storage

    RASS RIMMER RUSH UTTER PERATOR ANUAL TORAGE WARNING DANGER During operation the muffler or catalytic muffler and surrounding cover become hot. Always keep exhaust area clear of flammable debris during transportation or when storing, otherwise serious property damage or personal injury may result.

  • Page 30: Specifications

    PECIFICATIONS MODEL ----------------------------------------------------- SRM-251U Length ------------------------------------------------------- 1832 mm (72.12 in.) Width -------------------------------------------------------- 695 mm (27.37 in.) Height ------------------------------------------------------- 447 mm (17.62 in.) Weight (dry) w/Cutter Head ------------------------------ 5.74 kg (12.67 lb.) Engine Type ------------------------------------------------ Air cooled, two-stroke, single cylinder gasoline engine Bore ---------------------------------------------------------- 34.0 mm (1.34 in.)
  • Page 31 RASS RIMMER RUSH UTTER PERATOR ANUAL NOTES...

  • Page 32: Servicing Information

    • Purchasing from your Echo Dealer. • Manuals are available by sending a written request stating the model number and serial number of your Echo unit, part number of the manual, your name and address, and mail to the address below.

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