SERVICE BULLETIN RS 307 May, 200 MODEL EY5-3, EY20-3 SUBJECT Model change of EY5 and EY20 PURPOSE: To improve engine reliability, better sealing of governor shaft To renew engine design and color Reduction of oil consumption, and asbestos-free gasket to comply with emission regulations. To reduce engine noise. DETAIL OF THE CHANGE: Refer to pages 5-23 CHANGE OF PART NUMBERS AND INTERCHANGEABILITY: Refer to pages 20-23 EXECUTION: This change has been applied from June 200 production. The starting serial numbers are: EY5-3 ; #600000 EY20-3 ; #600000 e-mail: sales@robinamerica.com www.robinamerica.com - -
.) ENGINE DIMENSION ) EY5-3 STD specification - 2 -
2) EY5-3 Generator and Pump specification - 3 -
3) EY20-3 STD specification - 4 -
2.) CRANKCASE ) The oil seal will be added in the hole for governor shaft. - 5 -
2) The material of intake valve seat will be changed (EY20-3) 3) The material of exhaust valve seat will be changed (EY5-3, EY20-3) 4) The ball bearing will be changed 5) The Valve guide will be changed 6) The boss to install the exciter coil will be eliminated. - 6 -
3.) MAIN BEARING COVER The ball bearing will be changed. 4.) GASKET CP (HEAD) The material will be changed to asbestos-free material (graphite). NOTE: When repairing the engine, wipe off oil and clean the contact surface of crankcase and cylinder head. 5.) GASKET (TAPPET COVER) 6.) GASKET (BREATHER PLATE) The materials will be changed to asbestos-free materials. 7.) CRANKSHAFT Material will be changed 8.) PISTON The piston shape will be changed. - 7 -
9.) TOP RING The shape of the top ring will be changed. 0.) OIL RING The specification of the oil ring will be changed..) CAMSHAFT The material will be changed. 2.) INTAKE VALVE The distinction mark on vlalve surfaces will be elinimated. 3.) EXHAUST VALVE The distinction mark on valve surface will be eliminated. - 8 -
4.) MUFFLER The muffler shape will be changed from cylinder type to the square type. The direc tion of exhaust outlet will be changed from "45 degree" to "0 degree ( parallel with the PTO). - 9 -
5.) MUFFLER COVER The change of muffler cover shape will be accompanied with the muffler change. NOTE: After the change of the muffler and muffler cover, the optional parts (exhaust deflector and spark arrestor) can be installed in the field. - 0 -
6.) GASKET (EXHAUST) The material will be changed to asbestos-free material (graphite). NOTE: When repairing the engine, wipe off oil and clean the contact surface. Also replace the gasket with the new one. 7.) AIR CLEANER AY The air cleaner will be changed. 8.) GASKET (INSULATOR) The material will be changed to asbestos-free material (graphite). 9.) GOVERNOR LEVER The bending angle of the governor lever will be changed to secure a clearance between the fuel pipe and the governor lever. 20.) BLOWER HOUSING ) The welding point on the guide plate will be changed. 2.) LABEL (Model) The design and form will be changed. - -
22.) RECOIL STARTER AY ) For STD specification the recoil starter shape will be changed. A B C EY5-3D 35.5 20.8 45 EY20-3D á á á A B C EY5D 45 33 30 EY20D 5 39 á Note: The pitch of mounting holes will not be changed. - 2 -
2) For pump and generator specifications the material of the recoils starter will be changed from sheet metal to resin. - 3 -
3) Pulling direction of starter knob will be unified as follows: Direction "H" is unified in Direction "A". Direction "B" is unified in Direction "C". Direction "D" is unified in Direction "E". Direction "F" is unified in Direction "G". - 4 -
23.) LABEL, Trademark The new label will be on the recoil starter. 24.) LABEL, Engine Name The model name will be changed. 25.) LABEL, Caution The safety caution label will be changed. - 5 -
26.) FUEL TANK CAP The material of the outside cap will be changed from sheet metal to resin. 27.) FUEL PIPE The fuel pipe between the fuel strainer and carburetor will be changed from straight type to molded type. - 6 -
28.) CARBURETOR The fuel inlet nipple will be changed from "L" shape pipe to straight pipe. Note: This illustration shows the carburetor for the EY5-3D. Note: Distinction mark for STD carburetor 53300 (EY5-3D) - 56030 (EY5D) 2030 (EY20-3D) - 2030 (EY20D) 29.) OIL GAUGE Oil gauge will be changed. - 7 -
30.) MAGNETO ) FLYWHEEL The thread hole for the flywheel puller will be eliminated. Note: How to remove the flywheel from the engine ) Remove the fixing nut from flywheel. 2) Remove the starter pulley. 3) Temporally assemble the fixing nut to the crankshaft thread until the end face. 4) Tap the fixing nut with a plastic hammer to remove the flywheel. a.) Do not tap directly with a steel hammer. b) Be careful not to damage the thread portion when using a steel hammer. Tap the fixing nut after inserting aluminum bar between the fixing nut and a steel hammer. - 8 -
2) IGNITION COIL The shape of the ignition coil will be changed. ) EY5-3 2) EY20-3 3.) SWITCH AY The switch will be changed. - 9 -
CHANGE OF PART NUMBERS AND INTERCHANGEABILITY:.) EY5-3D Part Name Part Number Interchangeability Part Number Remarks AFTER CHANGE QTY. BEFORE CHANGE QTY. Crankcase 28-00-0 226-00-2 Incl. # 2,3 2 Ball Bearing X60-02500-0 060-02500-0 3 Oil Seal 044-00800-0 - - 4 Washer 003-080-00 - - 5 Main Bearing CV 282-00-0 227-00-3 Inc. # 6 6 Ball Bearing X60-02500-0 060-02500-0 7 Gasket, head 28-500-H 226-500- 8 Gasket, tappet 282-6006-06 227-6006-03 9 Gasket, breather 282-6007-03 227-6007-03 0 Crankshaft 28-2020-0 226-2020-5 Piston 28-2340-03 226-234-03 2 Camshaft 28-370-03 226-370-3 3 Intake Valve 28-3340-03 226-3340-03 4 Exhaust Valve 28-3350-03 226-3350-3 5 Muffler 28-300-H 226-300-0 6 Muffler Cover 28-3420-H 226-3420- 7 Gasket, exhaust 28-3520-H 226-3520-0 8 Air Cleaner AY 282-3260-H0 227-32603-00 9 Gasket 282-3590-03 227-3590-03 20 Governor Lever 28-4230-0 226-4230- 2 Blower Housing 28-5260-0 226-520-03 22 Label, model 28-950-03 - - 23 Label, trademark - - 227-970-3 24 Recoil Starter 28-502-00 226-508-00 25 Label, trademark 073-2005-40 - - 26 Label, engine 28-9802-H3 226-9802-3 27 Fuel Tank 28-600-0 226-600-2 28 Label, caution X73-20047-20 073-20047-20 29 Fuel Tank Cap 043-0430-00 043-04300-5 30 Fuel Pipe 28-6260-H 226-6263-0 Incl. # 3,32-20 -
CHANGE OF PART NUMBERS AND INTERCHANGEABILITY:.) EY5-3D Part Name Part Number Interchangeability Part Number Remarks 3 32 33 34 35 36 37 38 39 AFTER CHANGE QTY. BEFORE CHANGE QTY. Rubber Pipe 28-6260-H3 085-06-60 Hose Clamp X56-00-20 2 056-00-20 2 Carburetor AY 28-6230-00 226-62360-30 Oil Gauge 282-6360-H 2 - - Incl. # 35,36 Oil Gauge 282-6360-H3 2 269-6360-03 2 Gasket X2-360-20 2 02-3600-20 2 For Oil gauge Flywheel 28-7920-0 226-79230-0 Ignition Coil 28-7940-0 226-79430-5 Switch X66-00003-6 066-00003-6 2 Recoil Starter 28-503-00 226-507-20 Pump/Generator Flange Bolt 0-00600-20 4 0-00600-0 4 Recoil Starter - 2 -
CHANGE OF PART NUMBERS AND INTERCHANGEABILITY: 2.) EY20-3D Part Name Part Number Interchangeability Part Number Remarks AFTER CHANGE QTY. BEFORE CHANGE QTY. 2 3 4 5 6 7 8 9 0 2 3 4 5 6 7 8 9 20 2 22 23 24 25 26 27 28 29 30 Crankcase Ball bearing Oil Seal Washer Main Bearing CV Ball Bearing Gasket, head Gasket, tappet Gasket, breather Crankshaft Piston Top Ring Oil Ring Camshaft Intake Valve Exhaust Valve Muffler Muffler Cover Gasket, exhaust Air Cleaner Gasket, Blower Housing Blower Housing Label, model Label, trademark Recoil Starter Label, trademark Cylinder Baffle Label, engine Fuel Tank, AY 282-00-0 X60-02500-0 044-00800-0 003-080-00 282-00-0 X60-02500-0 282-500-H 282-6006-03 282-6007-03 282-2020-0 282-2340-03 282-2360-03 282-2390-03 282-370-03 282-3340-03 282-3350-03 282-300-H 282-3420-H 282-3520-H 282-3260-H0 282-3590-03 282-520-0 282-5260-0 282-950-03-282-502-00 073-2005-40 282-52602-0 282-9802-H3 282-600-00-227-00-2 060-02500-0 - - 227-00-3 060-02500-0 227-500- 227-6006-03 227-6007-03 227-2020-5 227-2340-03 227-2360-03 227-2392-23 227-370-03 227-3340-03 227-3350-03 227-300-0 227-3420- 24-3520- 227-32603-00 227-3590-03 227-530-0 227-530-06-227-970-3 227-508-0-227-52602-0 227-9802-3 227-600-20 - - - - Incl. # 2,3 Incl. # 6 Incl. # 23,24 Incl. #29 Incl. #3-36 - 22 -
CHANGE OF PART NUMBERS AND INTERCHANGEABILITY: 2.) EY20-3D Part Name Part Number Interchangeability Part Number Remarks 3 32 33 34 35 36 37 38 39 40 4 42 43 AFTER CHANGE QTY. BEFORE CHANGE QTY. Fuel Tank, CP 282-600-0 227-600-2 Label, caution X73-20047-20 073-20047-20 Fuel Tank Cap 043-0430-00 043-04300-5 Fuel Pipe 282-6260-H 227-62640-0 Rubber Pipe 282-6260-H3 085-0609-50 Hose Clamp X56-00-20 2 056-00-20 2 Carburetor 227-623-00 227-6230-0 Oil Gauge Cp 282-6360-H 2 - - Incl.# 39,40 Oil Gauge 282-6360-H3 2 269-6360-03 2 Gasket X2-3600-20 2 02-6600-20 2 Flywheel 282-7920-0 226-79230-0 Ignition Coil 282-7940-0 226-79430-5 Switch X66-00003-6 066-00003-6-23 -