ROBIN AMERICA, - Small Engines

1 ROBIN america , INC. - ROBIN TO WISCONSIN ROBIN . engine MODEL CROSS REFERENCE LIST. ROBIN WISCONSIN ROBIN . EY08 Wf-080. EY15 W1-145. EY 15V W1-145V. EY20 W1-185. EY20V W1-185V. EY23 W 1-230. EY28 W 1-280. EY35 W 1-340. EY40 W1-390. EY45V W 1-450V. EY2 1 EY21W. - EY44 EY44W. EY 1 8-3 EY 18-3 W. EY25 EY25W. EY 27 EY27W. EHll wo1-115. EH12 wo1-120. EH15 WO1-150. EH17 WO1-170. EH21 wo1-210. EH25 wo1-250. EH30 WO 1-300. EH3 OV WO 1-300v EH34 WO 1 -340. EH3 4V WO 1-340V. EH43V WQ 1-430V. TWO CYCLE. EC13V WT1-125V. DlESEL. DY23 WRD1-230. DY27 WRD 1-270. DY30 WRD 1-300 1.

2 DY3 5 WRD1-350. DY4 1 WRD1-410. CONTENTS.. See tion Title Page 1. SPECIFICATIONS .. 1. 2. PERFORMANCE .. 2. 2-1 Maximum Output .. 2. 2-2 Continuous Rated Output .. 2. 2-3 Maximum Torque and Fuel Consumption Ratio a t Max Output .. 2. 3. FEATURES .. 4. 4 . GENERALDESCRIPTION of ENGINECONSTRUCTION .. 4. 4-1 Cylinder. Crankcase .. 4. 4-2 MainBearingCover .. 5. 4-3 Crankshaft .. 5. 4-4 Connecting Rod andPiston .. 5. 4-5 Camshaft .. 6. 4-6 Cylinder Head .. 6. 4-7 Valve Arrangement .. 6. 4-8 Governor .. 7. 4 -9 Balancer .. 7. 4-10 Decompression Device.

3 7. 4-11 Cooling Device .. 8. 4-12 Lubrication .. 8. 4-13 Ignition Device .. 8. 4-14 Carburetor .. 9. Cleaner .. 9. 4-16 Diode Rectifier .. 9. 4-17 Sectional View of engine .. 10. 5 . DISASSEMBLY and REASSEMBLY .. 12. 5-1 Preparations and Suggestion .. 12. 5-2 Special Tools .. 12. 5-3 How to Disassemble .. 13. 5-4 How to Reassemble .. 18. Tappet Clearance Adjustment .. 22. Ignition Timing Adjustment .. 23. Governor Setting Method .. 25. See rion Title Page 6. CARBURETOR .. 26. 6-1 Operation and Construction .. 26. 6-2 Disassembly and Reassembly.

4 27. 7. BREAK-INOPERATION of REASSEMBLEDENGINE .. 28. 8. ROBINSOLIDSTATEIGNITIONENGINE(OPTION) .. 29. 8-1 Features .. 29. 8-2 Basic Circuit andOperatingTheory of I . System .. 29. 8-3 Checking Unitwith Tester .. : .. 29. 8-4 MeasuringResistances of Exciter Coil andPulser Coil .. 29. 9. TROUBLESHOOTING.. 30. 9-1 Starting Difficulties .. 30. 9-2 EngineMisfires .. 31. 9-3 Enginestops .. 31. 9-4 engine Overheat .. 31. 9-5 EngineKnocks .. 32. 9-6 EngineBackfires through Carburetor .. 32. 10 . INSTALLATION .. 33. 10-1 Installing .. 33. 10-2 Ventilation.

5 33. 10-3 Exhaust Gas Discharge .. 33. 10-4 Fuelsystem .. 33. 10-5 PowerTransmission to Driven Machines .. 34. 10-6 Wiring .. 34. 11 . CHECKS and CORRECTIONS .. 37. 12. TABLE of CORRECTIONSTANDARDS .. 38. 13 . MAINTENANCE and STORING .. 43. 13-1 Daily and Maintenance .. 43. 13-2 Every 20 Hours Checks andMaintenance .. 43. 13-3 Every 50 Hours (10 days)Checks andMaintenance .. 43. 13-4 - Every 100 200 Hours (Monthly) Checks andMaintenance .. 43. 13-5 Everv 500- 600 Hours(Semiannual)ChecksandMaintenance .. 44. 13-6 Every 1000 Hours (Yearly) ChecksandMaintenance.

6 44. 13-7 Preparation for Long Abeyance .. 44. 1. SPECIFICATIONS. w i -1- 2. PERFORMANCE. 2-1 MAXIMUM OUTPUT. The maximum ouput of an engine is such standard power as developed by the engine , after its initial break in period with all the m,oving parts properly worn in,when operating with a fully open throttle valve. Therefore, a new engine may not develop the maximum output in the beginning because the moving parts are not in a properly worn-in condition. -2- - rpm PERFORMANCE CURVE. MODEL EY40D. kg-m t ( ). ( ). 10. 9. 8. 7. HP. I. 6. 5. 4. 3. 2.

7 1. 0. -3- 3. FEATURES. Small in size, light in weight The cylinder and crankcase are of a one-piece aluminum diecast structure, which is light in weight. The dimensions are reduced as much as possible for easy mounting. Quiet operation with low level of vibration Intake and exhaust noises are reduced by use of a newly designed muffler having glass wool and a cyclone cleaner. Ma- chine noise is reduced by selectionof a suitable cam shaft profile and optimumclearances for inner parts. All t h s adds up to a quiet engine . Vibration is also reduced to a low level by weight reduction of reciprocating parts, and selection of a timing balancer and optimum balance factor.

8 Easy to start These Engines can easily be started because they employ an automatic decompression device and a newly designed re- coil starter. Wide range of adaptability These models are available in various types of output shafts and also a type (Type B) with a built-in 1/2 reduction gear for application to various kinds ofmachines. The Engines have two oil drain ports, and theirrecoil starter can be pulled in any desired direction. Various optional parts are also available. All these combine to increase adaptabilityto machines. Durable, reliable and safe A liner of special cast iron, hard-chrome-plate piston rings, forged rod, etc.

9 Are used to make these Engines as reliable and durable as the preceding models of the EY Series. Safety devices are also incorporated to assured added safety. 4. GENERAL DESCRIPTION of engine CONSTRUCTION. 4-1 CYLINDER, CRANKCASE. The cylinder and crankcase are single piece aluminum die casting. The cylinder liner, made of special cast iron, is built into the aluminumcasting. The intake and exhaust portsare located on one side of the cylinder, and arealso inserted in- to the casing. The crankcase is separable on the output shaft side, where the main bearing cover is attached to it.

10 (See Fig. 1 .). Fig. 1. -4- 4-2 MAIN BEARINGCOVER. The main bearing cover made of aluminum die casting is built onto the output shaft side of the crankcase so that the inside of the engine can readily be checked by simplyremoving the cover. It is provided with a flange and boss for directly mount- B ing machines, such as generators and pumps. Two oil gauges also serving as oil filler caps can be mounted.. (See Fig. 2 and Fig. 3 .). R I N G for CENTERING. O I L GAUGE. Fig. 2 Fig. 3. 4-3 CRANKSHAFT. INDUCTION HARDENING. (PORTION of C R A N K P I N ).