Echo SRM-251SB Operator'S Manual Download Page 28

Page: 28 / 32

* Install and use U-Handle when operating any model with blade.

MODEL ----------------------------------------------------- SRM-251SB

Shaft Length ------------------------------------------------ 1828 mm (72.0 in.)

Unit Width -------------------------------------------------- 313 mm (12.31 in.)

Unit Height ------------------------------------------------- 235 mm (9.25 in.)

Weight (dry) w/cutting attachment ---------------------- 5.64 kg (12.43 lb.)

Engine Type ------------------------------------------------ Air cooled, two-stroke, single cylinder gasoline engine

Bore ---------------------------------------------------------- 34.0 mm (1.34 in.)

Stroke -------------------------------------------------------- 28.0 mm (1.10 in.)

Displacement ----------------------------------------------- 25.4 cc (1.55 cu. in.)

Exhaust System -------------------------------------------- Spark Arrestor Muffler w/catalyst

Carburetor -------------------------------------------------- Zama w/purge

Ignition System -------------------------------------------- CDI (capacitor discharge ignition)

Spark Plug -------------------------------------------------- NGK BPM-8Y Gap 0.65 mm (0.026 in.)

Fuel ---------------------------------------------------------- Mixed (Gasoline and Two-stroke Oil)

Fuel/Oil Ratio ----------------------------------------------- 50:1 ECHO High Performance, two-stroke air cooled engine oil

Gasoline ----------------------------------------------------- 89 Octane unleaded. DO NOT use fuel containing methyl alcohol,

more than 10% ethyl alcohol or 15% MTBE.

Oil ------------------------------------------------------------ 50:1 ECHO High Performance, two-stroke air cooled engine oil

Fuel Tank Capacity ---------------------------------------- 0.42 lit. (14.2 US fl. oz.)

Starter System ---------------------------------------------- Automatic Recoil Starter

Clutch ------------------------------------------------------- Centrifugal Type

Drive Shaft (upper & Lower) ----------------------------- 6.35 mm (1/4 inch) Flex Shaft

Rotating Direction ----------------------------------------- Counter clockwise viewed from top

Cutting Attachment --------------------------------------- Nylon line head (2-line) with .095 in. Cross Fire

line capacity

6 m (20 ft.)

Handles* ---------------------------------------------------- Front - Loop, Rear - Grip, when operating with standard line head

Shoulder Harness ------------------------------------------ Optional

Idle Speed (RPM) ------------------------------------------ 2,500 - 3,000

Wide Open Throttle Speed (W.O.T.)

with Nylon Line Head ------------------------------------- 8,500 - 10,500 RPM

Wide Open Throttle Speed (W.O.T.)

with Blade --------------------------------------------------- 10,000 - 12,000 RPM

PECIFICATIONS

Summary of Contents for SRM-251SB

Page 1: ...Operator s Manual MODEL SRM 251SB WARNING DANGER Readrulesforsafeoperationandinstructionscarefully ECHOprovidesanOperator s ManualandaSafetyManual Bothmustbereadandunderstoodforproperandsafe operation X7502021901 X750008081 11 05 ...

Page 2: ...e 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 acces sories and may not include all standard equipment TABLE OF CONTENTS Introduction 2 The Operator s Manual 2 The Safety manual 2 Safety 3 Manual Safety Symbols and Important Information 3 International Symbols 3 Personal Con...

Page 3: ...osed Choke Control Run Position ChokeOpen Do not use blades String lineonly IMPORTANT The enclosed message provides information necessary for the protec tion of the unit NOTE This enclosed message provides tips for use care and maintenance of the unit Throughout this manual and on the product itself you will find safety alerts and helpful informational messages preceded by symbols or key words The...

Page 4: ...atures are cooler WARNING DANGER Users of this product risk injury to themselves and others if the unit is used improperly and or safety precautions are not followed Proper clothing and safety gear must be worn when operating unit PERSONAL CONDITION AND SAFETY EQUIPMENT Extended Operation Extreme Conditions It is believed that a condition called Raynaud s Phenomenon which affects the fingers of ce...

Page 5: ... 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 An extreme RSI condition is Carpal Tunnel Syndrome CTS which could occur when your wrist swells and squeezes a vital nerve that runs through the area Som...

Page 6: ... for fuel leaks DO NOT operate unit if leaks are found Inspect shield for damage and ensure 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 Check that front loop handle and shoulder strap or shoulder waist harness are adjusted for safe comfortable operation See Assembly Section ...

Page 7: ...you understand and follow the instructions on them If a decal cannot be read a new one can be ordered from your ECHO dealer See PARTS ORDER ING instructions for specific information P N 89022809560 P N 89016054130 P N 89016006361 Hot Decal near muffler 14 15 16 17 13 19 20 18 P N 89016054130 P N 89022809560 P N X505001930 English Translation Shaft Decal P N X505001930 ...

Page 8: ... Cut Off Knife and Safety Decal Mounts on the Gear Housing Assembly just above the cutting attachment Helps protect the operator by deflecting debris produced during the trimming operation This shield must be replaced with the steel shield for blade use 11 LOWERDRIVESHAFTASSEMBLY IncludestheDebrisShieldAssembly GearHousingAssembly LowerFlexible Drive Cable Nylon Cutting Attachment and Safety Decal...

Page 9: ...rd ___ 1 LimitedWarrantyStatement ___ 1 Plastic shield ___ 1 T wrench ___ 1 Lockingtool ___ 1 4mmHexwrench ___ 1 NylonTrimmerHead ___ 1 HandleBracket Bottom ___ 1 Safety Glasses ___ 1 2 StrokeOilSample ___ 1 Shieldplate ___ 3 5x16mmscrews shieldmtg Tools Required None Parts Required Power Head Shaft Lower Shaft Assembly 1 Set Power Head Shaft Assembly on a level surface 2 Pull locator pin A out an...

Page 10: ...shaft rotation 5 Secure lower shaft assembly to coupler by tightening clamping knob D 1 Remove plastic sleeve and upper plate A from PTO shaft 2 Install the shield on the bottom of the bearing housing flange 3 Place shield plate B on shield align holes and install three 3 5x16mmscrews 4 Install upper plate A B A NYLON LINE HEAD INSTALLATION Tools Required HeadLockingTool Parts Required NylonLineHe...

Page 11: ...hen using Power PrunerTM or Hedge Clipper Attachments 1 Position front handle assembly for comfortable operation and tighten screws 2 Retain bottom Handle Bracket for front handle use without barrier bar Front Handle without Barrier Bar NOTE Label shows minimum spacing for front handle location 1 Remove Barrier Bar and replace with bottom handle bracket 2 Position handle assembly for comfortable o...

Page 12: ...s MUST be sharp Dull blades increase the chance of kick out and injury to yourself and bystanders NOTE The Barrier Bar is used to restrict rearward movement of the unit For heavy duty or extended use U handles should be used See your Echo dealer or Trimmer Brush Cutter Safety Manual for details regarding U Handles If you have additional questions contact your Echo Service Dealer or call Echo direc...

Page 13: ...d woody growth up to 64 mm 2 1 2 in diameter 22ToothClearingBlade 99944200130 isdesignedfordensethickets and saplings up to 64 mm 2 1 2 in diameter UseShoulder WaistHarness P N99944200200 Useofthe Shoulder Waist Harness is recommended for ALL Trimmer Brush Cutter use The Shoulder Waist Harness suspends the trimmer from the operator s shoulder and reduces operator fatigue The restrictive harness en...

Page 14: ...soline Use 89 Octane R M 2 mid grade or higher gasoline known to be good quality Gasoline may contain up to 15 MTBE methyl tertiary butyl ether Gasohol containing methyl wood alcohol is NOT approved TwoStrokeOil Atwo strokeengineoilmeetingISO L EGD ISO CD 13738 and J A S O FC Standards must be used Echo brand premium Power Blend TM Universal 2 Stroke Oil meets these standards Engine problems due t...

Page 15: ...keep movable attachment parts clear of all obstacles Firmly grasp right hand grip and throttle trigger lockout with left hand and fully depress throttle trigger to wide open position Rapidly pull recoil starter handle rope D until engine fires ormaximumfive 5 pulls 5 Choke After engine fires or 5 pulls move choke lever back to Run position Hold throttle trigger and throttle trigger lockout fully d...

Page 16: ...isible and flows freely in the clear fuel tank return line Pump bulb an additional 4 or 5 times 3 Recoil Starter Lay the unit on a flat area and keep movable attachment parts clear of all obstacles Rapidly pull recoil starter handle rope D until engine fires NOTE If engine does not start after 5 pulls use Cold Start Procedure STOPPING ENGINE 1 Throttle Release throttle and allow engine to return t...

Page 17: ...N I I E T O N T N A T R O P M I d e r i u q e r f o y c n e u q e r f e h t e n i m r e t e d l l i w e c n e i r e p x e r u o y d n a e s u l a u t c A m u m i x a m e r a n w o h s s l a v r e t n i e m i T e c n a n e t n i a m S E T O N E R U D E C O R P E C N A N E T N I A M 1 O H C E y l p p A E B U L M T e s u f o s r u o h 5 2 y r e v e 2 O H C E y l p p A E B U L M T e s u f o s r u o h ...

Page 18: ...ace it 3 If filter can be reused be certain it fits tightly in the air filter cavity is installed with the original side out FUEL FILTER Level1 Tools Required 200 250mm 8 10in lengthofwire with one end bent into a hook clean rag funnel and an approved fuel container Parts Required 90008REPOWERTM AIR FUELFILTERKIT WARNING DANGER FuelisVERYflammable Useextremecarewhenmixing storingor handling 1 Use ...

Page 19: ...lb COOLING SYSTEM Level2 Tools Required 3 4 mm Hex Wrench cleaning brush 25 or 50 mm 1or2in Parts Required None if you are careful IMPORTANT To maintain proper engine operating temperatures cooling air must pass freely through the cylinder fin area This flow of air carries combustion heat away from the engine Overheating and engine seizure can occur when Air intakes are blocked preventing cooling ...

Page 20: ... Screen Level2 Tools Required Cross Head Screwdriver Soft Metal Brush 4mmHexWrench Parts Required Spark Arrestor Screen Gasket 1 Remove spark plug lead 2 Remove one 1 muffler cover screw and muffler cover 3 Place piston at Top Dead Center TDC to prevent carbon dirt from entering cylinder 4 Remove spark arrestor screen cover A gasket B and screen C frommufflerbody 5 Clean carbon deposits from scree...

Page 21: ...e carburetor adjustments can be made During the break in period your engine performance will increase and exhaust emissions will stabilize Idle speed can be adjusted as required High Altitude Adjustment High altitude adjustment is not required for proper operation of this engine Level2 Tools required Screwdriver tachometer EchoP N99051130017 Parts required None NOTE Do not adjust carburetor unless...

Page 22: ...nt exceeding emission limits and over rich adjustment but not over lean adjustment which can cause engine failure Do not exceed recommended HI speed engine R P M during operation or for long periods during adjustment 1 Start engine run at idle for one minute 2 Complete warm up by running at full throttle for 5 minutes operating choke twice to clear air from carburetor chambers 3 Run at idle and ac...

Page 23: ...ating screw C Pull gear box and shield from drive shaft housing 2 Pull flexible cable from the drive shaft housing wipe clean and re coatwithathincoating 15ml 1 2oz of ECHO LUBETM 3 Slide the flexible cable back in the drive housing DO NOT get dirt on the flex cable 4 Install the gear housing and shield assembly IMPORTANT Flat edge of washers D must be against drive shaft Drive Shaft Upper 1 Remov...

Page 24: ...l one on each side of barrier 3 Wind both lines tightly and evenly one on each side of barrier in the direction of arrow on bottom of spool 4 Place ends of lines into notches in spool leaving 6 in protruding 5 Feed ends of line outward through eyelets in drum 6 Turn inner drive so that pegs in drive align with grooves in spool and push spool into drum 7 Hold spool and drum securely with one hand a...

Page 25: ...unsafe handling due to vibration and can result in blade failure Tool required Flatfile preferred Electricgrinderifspecialcareis used Round rat tail file for gullet radius 1 File each tooth at a 30 degree angle a specific number of times eg 4 strokes per tooth Work your way around the blade until all teeth are sharp 2 DO NOT file the gullet radius of the tooth with the flat file The radius must re...

Page 26: ...0 0 m m 5 6 o t t s u j d A e c a l p e r r o n a e l C e c a l p e r r o n a e l C g u l p e c a l p e R e n i g n E s n u r r o s e i d t u b t o n s e o d e t a r e l e c c a y l r e p o r p r e t l i f r i A y t r i d r e t l i f r i A r a e w l a m r o N e c a l p e r r o n a e l C r e t l i f l e u F y t r i d r e t l i f l e u F s e u d i s e r s t n a n i m a t n o C l e u f n i e c a l p ...

Page 27: ... 5 Tighten all the screws and nuts 6 Drain the fuel tank completely and pull the recoil starter handle several times to remove fuel from the carburetor STORAGE Long Term Storage over 30 days 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 prop...

Page 28: ...OHighPerformance two strokeaircooledengineoil Gasoline 89 Octane unleaded DO NOT use fuel containing methyl alcohol more than 10 ethyl alcohol or 15 MTBE Oil 50 1ECHOHighPerformance two strokeaircooledengineoil Fuel Tank Capacity 0 42lit 14 2USfl oz Starter System AutomaticRecoilStarter Clutch CentrifugalType Drive Shaft upper Lower 6 35mm 1 4inch FlexShaft RotatingDirection Counter clockwise view...

Page 29: ... for the failure of cutting devices attachments or accessories which have not been tested and approved by ECHO for use with these units SRM Edger Attachment 99944200470 SRM Hedge Clipper Attachment 99944200480 SRM Cultivator Attachment 99944200510 SRMTrimmerAttachment 99944200540 SRM Power Pruner Attachment 99944200530 ProSweep Attachment 99944200550 ProThatch Attachment 99944200560 Articulating H...

Page 30: ...30 NOTES ...

Page 31: ...GRASS TRIMMER BRUSH CUTTER OPERATOR S MANUAL 31 NOTES ...

Page 32: ... product you may call the ECHO ConsumerProductSupportDepartmentat1 800 673 1558from8 30am to 4 30 pm Central Standard Time Monday through Friday Before calling please know the model and serial number of your unit to help your Consumer Product Support Representative WARRANTY REGISTRATION You may register your Echo equipment using the warranty registration card or register on line at www echo usa co...

Search results

Summary of Contents for SRM-251SB

Reviews:

Related manuals for SRM-251SB

Brands by name

Popular brands

Echo SRM-251SB, Operator'S Manual

Search results

Summary of Contents for SRM-251SB

Reviews:

Related manuals for SRM-251SB

Brands by name

Popular brands