SERVICE BULLETIN. RS 307 May, Model change of EY15 and EY20 EY15-3, EY

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Maximillian Parsons
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1 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 EXECUTION: This change has been applied from June 200 production. The starting serial numbers are: EY5-3 ; # EY20-3 ; # sales@robinamerica.com - -

2 .) ENGINE DIMENSION ) EY5-3 STD specification - 2 -

3 2) EY5-3 Generator and Pump specification - 3 -

4 3) EY20-3 STD specification - 4 -

5 2.) CRANKCASE ) The oil seal will be added in the hole for governor shaft

6 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

7 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

8 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

9 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)

10 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

11 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. - -

12 22.) RECOIL STARTER AY ) For STD specification the recoil starter shape will be changed. A B C EY5-3D EY20-3D á á á A B C EY5D EY20D 5 39 á Note: The pitch of mounting holes will not be changed

13 2) For pump and generator specifications the material of the recoils starter will be changed from sheet metal to resin

14 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"

15 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

16 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

17 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 (EY5-3D) (EY5D) 2030 (EY20-3D) (EY20D) 29.) OIL GAUGE Oil gauge will be changed

18 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

19 2) IGNITION COIL The shape of the ignition coil will be changed. ) EY5-3 2) EY ) SWITCH AY The switch will be changed

20 CHANGE OF PART NUMBERS AND INTERCHANGEABILITY:.) EY5-3D Part Name Part Number Interchangeability Part Number Remarks AFTER CHANGE QTY. BEFORE CHANGE QTY. Crankcase Incl. # 2,3 2 Ball Bearing X Oil Seal Washer Main Bearing CV Inc. # 6 6 Ball Bearing X Gasket, head H Gasket, tappet Gasket, breather Crankshaft Piston Camshaft Intake Valve Exhaust Valve Muffler H Muffler Cover H Gasket, exhaust H Air Cleaner AY H Gasket Governor Lever Blower Housing Label, model Label, trademark Recoil Starter Label, trademark Label, engine H Fuel Tank Label, caution X Fuel Tank Cap Fuel Pipe H Incl. # 3,

21 CHANGE OF PART NUMBERS AND INTERCHANGEABILITY:.) EY5-3D Part Name Part Number Interchangeability Part Number Remarks AFTER CHANGE QTY. BEFORE CHANGE QTY. Rubber Pipe H Hose Clamp X Carburetor AY Oil Gauge H Incl. # 35,36 Oil Gauge H Gasket X For Oil gauge Flywheel Ignition Coil Switch X Recoil Starter Pump/Generator Flange Bolt Recoil Starter - 2 -

22 CHANGE OF PART NUMBERS AND INTERCHANGEABILITY: 2.) EY20-3D Part Name Part Number Interchangeability Part Number Remarks AFTER CHANGE QTY. BEFORE CHANGE QTY 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 X X H H H H H H Incl. # 2,3 Incl. # 6 Incl. # 23,24 Incl. #29 Incl. #

23 CHANGE OF PART NUMBERS AND INTERCHANGEABILITY: 2.) EY20-3D Part Name Part Number Interchangeability Part Number Remarks AFTER CHANGE QTY. BEFORE CHANGE QTY. Fuel Tank, CP Label, caution X Fuel Tank Cap Fuel Pipe H Rubber Pipe H Hose Clamp X Carburetor Oil Gauge Cp H Incl.# 39,40 Oil Gauge H Gasket X Flywheel Ignition Coil Switch X

PARTS MANUAL EY35 / EY40 ENGINES. Models. PUB-EP5716A Rev. 04/00

PARTS MANUAL EY35 / EY40 ENGINES. Models. PUB-EP5716A Rev. 04/00 PARTS MANUAL Models EY35 / EY40 ENGINES PUB-EP5716A Rev. 04/00 940 Lively Blvd. Wood Dale, IL 60191 Phone: 630-350-8200 Fax: 630-350-8212 e-mail: sales@robinamerica.com www.robinamerica.com Copyright 2000