SRM-510ES
Contents
1. 1 The correct spark plug must be clean and properly gapped 2 The air lter element must be clean and properly installed 3 The muf er exhaust port must be clear of carbon 4 The fuel lines tank vent and fuel lter are in good condition and clear of debris 5 The fuel is fresh gt 89 octane RON and properly mixed at 50 1 with ISO L EGD or JASO FC FD 2 stroke oil 6 Install nylon line cutter with 2 nylon lines 225 mm properly cut without shield even if 3 tooth blade is installed for proper engine loading to adjust carburettor on both SRM 510ES L and SRM 510ES U B Adjustment with limiter plugs on carburettor Start and run engine for 10 seconds at idle and for 2 minutes alternating engine speed between WOT for 20 seconds and Idle for 10 seconds Adjust idle engine speed to 2 800 200 r min by turning Idle adjust screw Adjust nylon line length to be WOT engine speed within 8 000 500 r min 10 000 500 r min with shield If engine does not run correctly after this adjustment proceed to the next step 2 2 IMPORTANT After adjusting carburettor according to the steps 2 2 and 2 3 the limiter plug s must be installed in Idle and Hi speed mixture needle s hole s to comply with Emission Directive 2 2 Presetting Idle adjust screw Idle mixture needle and Hi speed mixture needle Tools Required Small screwdriver with 2 5 mm blade electronic tachometer P N G310 000050 lim iter cap tool2. SRM 510ES L SRM 510ES U Dimensions Length mm in 1860 73 2 Width mm in 355 14 0 655 25 8 Height mm in 324 12 8 460 18 1 Dry weight kg lb 8 5 18 7 8 8 19 3 Engine Type KIORITZ air cooled two stroke single cylinder Rotation Anticlockwise as viewed from the output end Displacement cm3 in3 51 7 3 155 Bore mm in 44 0 1 732 Stroke mm in 34 0 1 339 Compression ratio 5 8 Carburettor Type Rotary type Diaphragm horizontal draught with primer Model Walbro WYK 341 Venturi size Throttle bore mm in 13 5 15 0 0 531 0 591 Metering diaphragm pressure Lead pressure from inside of cleaner case Ignition Type CDI Capacitor discharge ignition system Digital magneto Spark plug RCJ 6Y BPRM7A Starter Type ES effortless start Rope diameter x length mm in 3 8 x 1150 0 15 x 45 3 Fuel Type Premixed two stroke fuel Mixture ratio 50 1 2 Petrol Minimum 89 octane petrol RON Two stroke air cooled engine oil ISO L EGD ISO CD13738 JASO FC FD Tank capacity L U S oz 1 0 33 8 Clutch Type Centrifugal 2 shoe pivot Handle Type Front Crescent loop with cushion grip U handle Rear Integrated control grip with cushion with integratedcontrol grip Drive shaft Type Solid hollow type with serration 10 tooth Inner shaft Diameter Length mm in 8 1588 0 31 62 5 Housing OD ID mm in 28 24 1 10 0 94 Main pipe Length mm in 1530 60 2
3. rang es from 11 000 to 11 700 r min after 20 seconds at WOT Make sure the nylon line cutter 3 tooth blade 255 mm does not rotate when engine is idle and en gine should accelerate smoothly 7 After adjusting carburettor insert and secure new plug s H A259 000000 deep in the needle holes per the Emission Directive using limiter plug tool C NOTE Engine WOT and idle speed in eld oper ation may vary from nal adjustment speci cations due to changing ambient conditions fuel and en gine loads Safe engine r min variances should be within the safe ranges for WOT and Idling speed as listed in Section 1 2 otherwise the carburettor should be readjusted ECHO ECHO D G E C H H C J J
4. Gear case Reduction ratio 1 33 Gear tooth Spiral bevel gear Lubrication Lithium based grease or ECHO XTended Protection TM Lubricant Cutter Type Nylon line cutter 3 tooth blade 255mm Pilot diameter mm in 25 4 1 0 Fastener type size mm Left hand thread nut M10 x 1 25 pitch Cutting rotation Anticlockwise as viewed from top OD Outer diameter ID Inner diameter Without shoulder harness and standard cutter Primer is on cleaner case SERVICE INFORMATION SRM 510ES 3 1 2 Technical data Model SRM 510ES L SRM 510ES U Engine Idling speed r min 2 750 250 Operating speed r min 8 000 Wide open throttle speed r min 9 500 11 000 1 11 000 11 700 2 Clutch engagement speed r min 3 500 Service limit speed r min 3 300 Compression pressure MPa kgf cm2 psi 0 83 8 5 121 Ignition system Spark plug gap mm in 0 6 0 7 0 024 0 028 Minimum secondary voltage at 1000 r min kV 14 0 Secondary coil resistance k 2 0 2 8 Pole shoe air gaps mm in 0 30 0 40 0 012 0 016 Ignition timing at 1 000 r min BTDC 22 at 3 000 r min BTDC 15 at 8 000 r min BTDC 25 at 10 000 r min BTDC 25 PET 9000 Parameter 1 328 2 05 Carburettor Idle adjust screw initial setting turns in 1 1 2 Idle mixture needle initial setting turns in 13 Hi speed mixture needle initial setting turns out 3 3 4 Test Pressure minimum MPa kgf cm2 psi 0 05 0 5 7 0 Metering lev
5. M 5 70 110 7 11 60 95 Others Blade fastening nut LM 10 280 320 28 32 245 280 Regular bolt nut and screw M 3 6 10 0 6 1 5 9 M 4 15 25 1 5 2 5 13 22 M 5 25 45 2 5 4 5 22 40 M 6 45 75 4 5 7 5 40 65 M 8 110 150 11 15 95 130 M 10 210 300 21 30 180 260 LM Left hand thread Apply thread locking sealant See below The torque differences among four bolts should not exceed 20 kgf cm 2N m 17in lbf on one cylinder or crankcase 1 4 Special repairing materials Material Location Remarks Grease Gear case Rewind spring Lithium based grease or ECHO XTended Protection TM Starter center post Lubricant Oil Oil seal inner lips Two stroke engine oil or engine oil SAE 30 Drive shaft Thread locking sealant Starter case Muf er cover Loctite 242 ThreeBond 1324 or equivalent Fuel tank Top guard SERVICE INFORMATION SRM 510ES 5 5K223 5K224 5K225 5K016 5K042 5K222 5K189 5K219 5K220 5K245 5K246 1 5 Service limits A B C D E F G H K L M Description mm in A Cylinder bore When plating is worn and aluminum can be seen B Piston outer diameter Min 43 95 1 730 C Piston pin bore Max 10 035 0 3951 D Piston ring groove Max 1 65 0 065 E Piston ring side clearance Max 0 1 0 004 F Piston pin outer diameter Min 13 97 0 5500 G Piston ring width Min 1 45 0 057 H Pis
6. SRM 510ES 10 52F 01 1 INTRODUCTION We are constantly working on technical im provement of our products For this reason technical data equipment and design are subject to change without notice All speci fications illustrations and directions in this SERVICE DATA are based on the latest product information available at the time of publication ECHO SERVICE MANUAL Ord 402 25 Model SRM 4000 RM 4000 contains lots of information for servicing this model 1 SERVICE DATA TRIMMER BRUSHCUTTER SRM 510ES Serial number 36000001 and after CONTENTS page 1 SERVICE INFORMATION 2 1 1 Speci cation 2 1 2 Technical data 3 1 3 Torque limits 4 1 4 Special repairing materials 4 1 5 Service limits 5 1 6 Special tools 6 2 CARBURETTOR ADJUSTMENT PROCEDURE 7 2 1 General adjusting rules 7 2 2 Presetting Idle adjust screw Idle mixture needle and Hi speed mixture needle 7 2 3 Adjusting carburettor 8 Reference No 10 52F 01 R E V I S E D 2 0 1 0 0 2 ISSUED 200906 SERVICE INFORMATION SRM 510ES 2 1 SERVICE INFORMATION 1 1 Speci cations Model
7. and warm engine for 1 minute engine speed at WOT NOTE If the engine doesn t start turn Idle mixture needle anticlockwise in 1 2 turn increments 2 Adjust Idle mixture needle D to reach maxi mum idle speed with 2 5 mm blade screwdriver J 3 Set idle speed to 3 500 r min by turning Idle adjust screw E Engine speed should be stable at 3 500 50 r min 4 Turn Idle mixture needle D anticlockwise to reduce engine idle speed 750 r min to set idle speed at 2 750 r min The idle speed range is 2 700 2 800 r min NOTE Engine speed must be allowed to stabilize a minimum of 20 seconds after each adjustment of idle mixture needle to assure accurate tachometer readings 5 Adjust Hi speed mixture needle G to reach maximum WOT engine speed after 20 seconds at WOT Then turn Hi speed mixture needle G anti clockwise to reduce WOT engine speed 120 r min RANG 100 140 r min Max approx 8 000 r min NOTE Nylon line length should be 225 mm with out shield 6 SRM 510ES L Stop engine reinstall shield and restart engine again and verify engine idle speed ranges from 2 500 to 3 000 r min and WOT engine speed ranges from 9 500 to 11 000 r min after 60 seconds at WOT NOTE Nylon line length should be 160 mm with shield SRM 510ES U Stop engine Reinstall shield for blade and 3 tooth blade 255 mm Start engine again and verify engine idle speed ranges from 2 500 to 3 000 r min and WOT engine speed
8. er height mm in 1 5 0 06 lower than diaphragm seat Air cleaner system type Inner vent Air lter Pleats BTDC Before top dead centre 1 With Nylon line cutter and shield 2 With 3 tooth blade 255 mm Set idle adjust screw to the point that its tip just contacts throttle plate before initial setting Screw in idle mixture needle from initial thread engagement at the point that the clicking sound is heard If clutch engagement speed is lower than service limit speed replace clutch assembly with new one SERVICE INFORMATION SRM 510ES 4 1 3 Torque limits Descriptions Size kgf cm N m in lbf Starter Starter pulley M 8 180 220 18 22 160 190 system Starter case M 5 35 50 3 5 5 30 45 Ignition Magneto rotor Flywheel M 10 200 240 20 24 175 210 system Ignition coil M 5 60 100 6 10 50 90 Spark plug M 14 130 170 13 17 115 150 Fan cover M 5 50 90 5 9 45 80 Fuel Carburettor insulator M 5 40 55 4 5 5 35 50 system Carburettor M 5 30 45 3 4 5 26 40 Fuel tank bracket M 5 70 110 7 11 60 95 Fuel tank M 5 50 90 5 9 45 80 Clutch Clutch shoe M 8 160 200 16 20 140 175 Engine Crankcase M 5 70 110 7 11 60 95 Cylinder M 5 70 110 7 11 60 95 Top guard M 5 30 45 3 4 5 26 40 Muf er M 6 110 150 11 15 95 130 Muf er cover M 5 30 45 3 4 5 26 40 Muf er stay
9. h side 15 897714 24330 Oil seal tool Installing crankcase oil seal starter side PTO shaft bearings 16 897726 21430 Oil seal tool Installing crankcase oil seal clutch side 17 897718 03930 Bearing tool Installing crankcase oil seal starter side 18 897719 02830 Piston holder Making piston steady to remove and install piston ring 19 363018 00310 Washer Installing crankcase oil seal starter side 20 91020 Limiter plug tool Removing and installing limiter plug 21 897800 79931 Spark tester Checking ignition system 22 897803 30132 Pressure tester Testing fuel pipes tank and crankcase leakages 23 897826 16131 Pressure plug Plugging intake port to test crankcase cylinder sealing 24 897827 16131 Pressure plate Plugging intake port to test crankcase cylinder sealing 25 897831 16131 Pressure plug Plugging exhaust port to test crankcase cylinder sealing 26 91037 Compression gauge Measuring cylinder compression 27 900300 Ignition Analyzer PET 9000 Measuring Ignition timing Primary Secondary voltage engine speed 1 6 Special tools 1 8 20 9 a 80 mm 10 a 70 mm 21 4 11 22 24 13 6 5 12 18 2 a 4 mm 3 a 5 mm 23 7 17 25 15 a 12 mm b 32 mm 16 a 15 mm b 24 5mm 19 26 14 27 SERVICE INFORMATION SRM 510ES 7 2 CARBURETTOR ADJUSTMENT PROCEDURE 2 1 General adjusting rules A Before adjustment check the following items
10. ton ring end gap Max 0 5 0 02 K Con rod small end bore Max 14 025 0 5522 L Crankshaft runout Max 0 02 0 001 M Clutch drum bore Max 79 5 3 13 SERVICE INFORMATION SRM 510ES 6 a 1 5 1 65 1 3 0 4 a 0 0 4 50 0 8 1 2 1 MPa 0 ECHO PET 304 OPPAMA PET 9000 INTEGRATED IGNITION ANALYZER a b Key Part Number Description Used for 1 G310 000050 Tachometer PET 304 Measuring engine speed to adjust carburettor 2 895610 79920 L hex wrench 4 mm Removing and installing hex socket bolt M5 3 895611 79920 L hex wrench 5 mm Removing and installing hex socket bolt M6 4 897501 03938 Puller Removing ywheel 5 897835 16131 Pressure connector Testing crankcase and cylinder leakages 6 897537 30130 Piston stopper Locking crankshaft rotation 7 897563 19830 Metering lever gauge Measuring metering lever height on carburettor 8 897603 23030 PTO shaft puller Removing PTO shaft 9 897701 02830 Bearing wedge Removing ball bearing remaining on crankshaft 10 897701 06030 Bearing wedge Removing ball bearing on PTO shaft drive gear 11 897701 14732 Bearing tool Removing and installing ball bearings on crankcase clutch drum 12 897702 30131 Piston pin tool Removing and installing piston pin Use 10mm dia adapter 13 897712 04630 2 pin wrench Removing and installing pawl carrier 14 897714 12330 Oil seal tool Installing crankcase oil seal clutc
11. with 2 5 mm left hand thread P N 91020 Parts Required 2 limiter plug P N A259 000000 1 Remove plugs from Idle mixture needle hole A and H mixture needle hole B using limiter plug tool C as follows 1 Put limiter plug tool C on limiter plug in mixture nee dle hole 2 Screw limiter plug tool anticlockwise 2 turns into lim iter plug pushing the tool against the plug to engage tool threads 3 Pull limiter plug tool with the limiter plug from mixture needle hole 4 Repeat plug removal procedure for remaining mixture needle NOTE If the plug is difficult to remove use a needle or pin to completely remove plug 2 Turn Idle mixture needle D anticlockwise to fully come out until clicking sound is heard Then turn it clockwise 13 turns Turn Hi speed mixture needle G clockwise until lightly seated Then turn it anticlockwise 3 3 4 turns 3 Turn Idle adjust screw E anticlockwise until screw tip just touches throttle plate F Then turn it in clockwise 1 1 2 turns NOTE The initial carburettor settings for Idle adjust screw Idle and Hi speed mixture needles are intend ed to start and run the engine before nal carburettor adjustments are made to conform the unit to meet Emission Directive are made The actual number of turns needed for engine operation may vary 3 2 1 C E F D G A E B SERVICE INFORMATION SRM 510ES 8 2 3 Adjusting carburettor 1 Start
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