80-52A-00 EA Reference No A-00 ISSUED:

Transcription

1 80-52A-00 EA lntroduction We are constantly working on technical improvement of our products. For this reason, technical data, equipment and design are subject to change without notice. All specifications, illustrations and directions in this SERVICE DATA are based on the latest products information available at the time of publication. ECHO SERVICE MANUAL Ord (Model : SRM-4000, RM-4000) contains lots of information for servicing this engine. CONTENTS page 1 SERVICE INFORMATION Specification Technical data Torque limits Special repairing materials Service limits Special tools EMISSION ADJUSTMENT GUIDE General adjusting rules Idle adjust screw, idle mixture needle and H mixture needle initial settings Adjusting carburetor Reference No A-00 ISSUED:

2 2 SERVICE INFORMATION EA SERVICE INFORMATION 1-1 Specifications Model EA-500 Dimensions Length mm(in) 584 (23.0) Width mm(in) 267 (10.5) Height* mm(in) 385 (15.2) Dry weight * kg(lb) 9.75 (21.5) Engine Type KIORITZ, air-cooled, two-stroke, single cylinder Semi-automatic decompression Rotation Counterclockwise as viewed from the output end Displacement cm 3 (in 3 ) 51.7 (3.16) Bore mm(in) 44.0 (1.73) Stroke mm(in) 34.0 (1.34) Compression ratio 6.6 : 1 Carburetor Type Diaphragm, horizontal-draught, with primer (purge bulb) Model Walbro WYK-216 Venturi size-throttle bore mm(in) ( ) Metering diaphragm pressure Lead pressure from inside of cleaner case Ignition Type CDI (Capacitor discharge ignition) system in a single integrated piece, with electronic timing advancer and speed governer Spark plug RCJ-6Y Starter Type Automatic rewind 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 Two-stroke air cooled engine oil Minimum 89 octane petrol ISO-L-EGD (ISO/CD13738), JASO FC Tank capacity L (U.S.fl.oz.) 1.1 (37.2) Clutch Type Centrifugal, 2 - shoe pivot Handle Type Left Cushion grip Right Integrated control grip w/cushion Gear case Reduction ratio 30.2 Gear tooth Lubrication Spur Lithium based grease Drill Type Earth Auger / Ice Auger Drill rotation * Without dril l Auger diameter mm(in) 50.8 (2) (10) Clockwise as viewed from top

3 EA-500 SERVICE INFORMATION Technical data Engine Idling speed rpm Wide open throttle speed rpm Clutch engagement speed rpm Compression pressure MPa (kgf/cm 2 ) (psi) 1.0 (10.0) (145) Ignition system Spark plug gap mm (in) ( ) Minimum secondary voltage at 1000 rpm kv 15.0 Secondary coil resistance kω Pole shoe air gaps mm(in) ( ) Ignition timing at 1000 rpm BTDC 17.5 Carburetor at 3000 rpm BTDC 25.0 at 7000 rpm BTDC 30.0 at rpm BTDC 11.5 Idle adjust screw initial setting turn in* 4 1/8 Test Pressure, minimum MPa (kgf/cm 2 ) (psi) 0.05 (0.5) (7.0) Metering lever height mm (in) 1.5 (0.06) lower than diaphragm seat BTDC: Before top dead centre. * Set idle adjust screw to the point that its tip just contacts throttle plate. ** Screw in idle mixture needle from initial thread engagement (at the point that the clicking sound is heard).

4 4 SERVICE INFORMATION EA Torque limits Descriptions Size kgf cm N m in lbf Starter system Ignition system Pawl carrier M Pawl carrier nut M Starter case M 5* Magneto rotor (Flywheel) M Ignition coil M Spark plug M Fan cover M Fuel Carburetor insulator M system Carburetor M Fuel tank bracket M Fuel tank M 5* Clutch Clutch shoe M Engine Crankcase M 5** Cylinder M 5** Decompression valve M Top guard M 5* Muffler M Muffler cover M 5* Muffler stay M Regular bolt, nut and screw M M M M M M * 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 Starter center post Lithium based grease or ECHO LUBE TM Oil Oil seal inner lips Drive shaft Two-stroke engine oil or engine oil (SAE#30) Thread locking sealant Starter case Muffler cover Loctite #242, ThreeBond #1324 or equivalent Fuel tank Top guard

5 EA-500 SERVICE INFORMATION Service limits A B C D 5K245A 5K222 5K223 5K224 E F G H 5K225 5K016 5K042 5K246A K L M 5K219 5K220 5K189 Description mm (in) A Cylinder bore When plating is worn and aluminium can be seen B Piston outer diameter Min (1.728) C Piston pin bore Max (0.3982) D Piston ring groove Max. 1.6 (0.063) E Piston ring side clearance Max. 0.1 (0.004) F Piston pin outer diameter Min (0.392) G Piston ring width Min (0.057) H Piston ring end gap Max. 0.5 (0.02) K Con-rod small end bore Max (0.552) L Crankshaft runout Max (0.002) M Clutch drum bore Max (3.13)