EY15V, EY20V - Small Engine Discount

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~~~ ~ ~ I ENGINE MODEL ITEM 1 Free length EY15 EY20 Squareness I Valve stem O.D. Clearance between stem and guide Tappet clearance STANDARD CORRECTION SIZE t TOLERANCE LIMIT 1 LIMIT USE I REMARKS 1 TOOL 1' >ORRECTIOh METHOD Vernier 37 -1.5 Replace calipers E : '.' 1 length I EY15 EY20 Intake Exhaust 6.5 dia' Intake 6.5 dia. Exhaust Intake Exhaust Intake Exhaust 0.056 - 0.100 I For total Replace -0.025-4.040 -0.056--0.078 Micro- -0.15 Replace -0.025--0.040 meter -0.056--0.078 0.025 - 0.062 Cylinder 0.3 0.3 At middle Replace When cold 0.10 *0.02 below 0.05 above 0.25 Correct I 0.1 - 0.3 0.5 Replace Stem end length EY 20 Intake 5.9 Exhaust 5.9 Intake 6.2 Exhaust 6.4 -1 .o -1 .o Vernier calipers Replace 35.6 Total length +0.06 - 0 -0.5 41.7 I Clearance between EY 15 0.013 - 0.037 0.2 stem and guide EY20 EY 15 Spark plug NGK BM4A 1 EY20 1 EY15 Spark gap 0.6 - 0.7 1 EY20 Spark timing 1 EY20 EY15 23" before T.D.C. - 0.5 0.2 Vernier calipers Replace Adjust or replace Timing f 2" f 5" Adjust tester Contact Point opening I E:;: 0.35 f 0.05 5 0.1 breaker Adjust - 46 -
ITEM MODEL HP/rpm CORRECTION I LIMIT REMARKS I Man. Output EY15 EY20 3.513600 4.613600 Below 110% of rated output Continuous Rated output EY15 EY20 2.2/3000 313000 r ITEM MODEL titer/hr CORRECTION PRECISENESS CORRECTION PROCEDURE 1.1 Fuel Consumption 135% of the standard value and up 3600 rpm at continuous rated output EY20 1.2 ITEM REMARKS MODEL cclhr USE LIMIT cc/hr Lubricant Consumption EY15 10 EY20 15 50 ITEM MOD EL P REMARKS Fixed quantity of Lubricant EY15 EY 20 0.56 *Use the SC or higher grade engine oil ITEM MODEL T Comparison between oil viscosity and temparature REMARKS i r When the peripheral ternparature is below -20°C, use the oil of viscosity and quality fitted to the local conditions. L Specified Lubricant Qualiry EY15 EY20 Single grade Multigrade ! I r- #20 1 t i f 3 0 1 I i _ 1 #40 When the peripheral temparature is more than 4OoC, use the oil of viscosity and quality fitted to the local conditions. I " The oil consumption is apt to increase. 1OW-30 when used under high peripheral tempa- 1 1 rature, so it is necessary to check every 1 I day. -20 -10 0 10 20 30 40°C If quality and quantity of the engine oil bemrne lower or less, burning might be caused. - 47 -
Page 2 and 3: ROBIN ROBIN AMERICA, INC. ROBIN TO
Page 4 and 5: Section Title Page 7 . GOVERNOR ADJ
Page 6 and 7: 2. PERFORMANCE 2-1 MAXIMUM OUTPUT T
Page 8 and 9: 4. GENERAL DESCRIPTION of ENGINE CO
Page 10 and 11: 4-7 CYLINDER HEAD The cylinder head
Page 12 and 13: 4-14 SECTIONAL VIEW of ENGINE MODEL
Page 14 and 15: ’piston Pin Main Bearing Cover Oi
Page 16 and 17: ~ 5. DISASSEMBLY and REASSEMBLY 5-
Page 18 and 19: ~ ~~ ~ ~~ 5-3 HOW TO DISASSEMBLE *L
Page 20 and 21: Order Procedures Remarks Tool exhau
Page 22 and 23: 5-4 MOW TO REASSEMBLE 0 Precaution
Page 24 and 25: 5-4-2 PISTON and PISTON RING 1) If
Page 26 and 27: ~ 5-4-5 MAIN BEARING COVER Install
Page 28 and 29: 5-4-7 TAPPET ADJUSTMENT Lower the t
Page 30 and 31: After measuring the air gap between
Page 32 and 33: 6. MAGNETO 6-1 MAGNETO The spark fo
Page 34 and 35: 5) Remove the flywheel without turn
Page 36 and 37: 2) With a screwdriver in the groove
Page 38 and 39: 8- 1 -2 PILOT SYSTEM The pilot syst
Page 40 and 41: 9. BREAK-IN OPERATION of REASSEMBLE
Page 42 and 43: The following three conditions must
Page 44 and 45: 11-5 ENGINE KNOCKS. % 2) 1) Low-qua
Page 46 and 47: 12-5 WIRING Wire as shown in the wi
Page 48 and 49: 14. TABLE of CORRECTION STANDARDS I
Page 52 and 53: ~~ ~ I ITEM I MODEL I FREQUENCY OF
Page 54: 15-5 EVERY 500 - 600 HOURS (SEMIANN

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