EY15V, EY20V - Small Engine Discount

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14. TABLE of CORRECTION STANDARDS ITEM Flatness of cylinder head L-l= EY20 Cylindricity 1 EY2O ENGINE MODEL I SIZE I TOLERANCE LIMIT EY15 EY20 EY15 Less than 0.1 1 67 dia. 1 0.01 0.1 0.1 5 rnax. & min. 0.1 5 T -. USE LIMIT 0.65 0.1 5 - 0.1 0.1 5 Surface plate, CORRECTION METHOD Correct Boring 0.015 I Valve seat contact width Valve guide I.D. I O.D.at skirt, in thrust direction (incl. over size) B 0.25 C 0.5 Width of ring groove 1 I portion 1 EY15 EY15 EY2O 1.2-1.5 i S.T.D.66.98 dia. - 0.02 EY 20 67.23 dia. :Top,6;:8;a. +0.025 Oil 2.8 +O .03 5 2.5 0.1 5 - 0.1 0.1 5 gauge Micrometer Vernier calipers Correct Replace Replace Replace Piston pin hole 1 Clearance between piston and cylinder E:;: EY15 EY20 1 EY15 Clearance between pisition ring and ring groove I Fit between piston ~y15 k and piston pin EY20 Ring gap Replace k Mircro- Ring width 14 dia. TOP 2n d Oil TOP 2nd Oil I +o ,002 - 0.009 0.035 0.035 Max. cylinder dia. and Cylinder 0.020-0.059 0.025 0.25 piston dia. gauge, at skert in Micro- Replace thrust direc- meter tion 0.090--0,135 0.060-0.705 0.01 0-0.065 Feeler 0.15 0.1 5 0.050-0.095 gauge Replace 0.010-0.055 0.010-0.065 Cylinder -0.009-0.010 gauge. 0.06L 0.06L Micrometer TOP 2nd 0.20 - 0.40 Oil TOP 2nd 0.05 - 0.25 Oil Top 2.0 -0.090--0.110 2nd 2.0 -0.060--0.000 Oil 2.8 -0.0 10--0.030 TOP 2.0 -0.050--0.070 2nd 2.0 -0.010--0.030 011 2.8 -o.a10--0.030 1.5 -0.1 1.5 -0.1 Cylinder gauge Feeler gauge 1 meter Replace - 44 -
~ REMARKS ~ I ITEM Piston pin 0. D. ENGINE STANDARD CORRECTION USE CORRECTIOP TOOL MODEL SIZE TOLERANCE I LIMIT LIMIT METHOD I I EY15 Micro- 0 - 0.04 - 0.04 EY20 ’* - -0.008 meter Replace 1 Large end I. D. EY15 EY 20 24 dia. 26 dia. +0.013 0 0.1 0.1 Replace Clearance between rod large end I.D. and crankpin EY15 EY20 0.037-0.063 0.2 0.2 Cylinder gauge, Micrometer Replace <strong>Small</strong> end I.D. Clearance between small end I.D. and pinston pin 1 I Large end side clearance Parallelism between large end and small end bores EY15 EY20 EY15 1 EY 20 EY15 I EY15 EY 20 1 Distance between large end and small end bores Re-machine i: 1 0.010-0.021 0.010-0.029 0.08 0.12 0.08 0.12 0.1 - 0.3 1 .o 1 .o 0.05 0.1 0.1 ? 0.1 0.15 Cylinder PU9e Cylinder gauge. Micrometer Test bar and Dial gauge Replace Replace or Replace Re-machine or Replace Crankpin O.D. Crankpin O.D. roundness 1 1 Crankpin O.D. cylindricity Crankpin O.D. parallelism Crankshaft journal O.D. EY20 EY20 EY15 1 1 EY15 24 dia. 26 dia. Less Less I I I Drive s. 25 dia. EY15 Mag. s. 25 dia. Drive s. 25 dia. Mag. s. 25 dia. -0.037 -0.050 than 0.005 than 0.005 Less than 0.008 0.1 5 0.5 Micrometer Micrometer Micrometer Dial gauge Re-machine or Reolace -0.003 Micro- - 0.05 - 0.05 Replace -0.01 2 meter 1 1 ~;~~ Drive Cam lobe height 20.1 EY20 1 s. 15 dia. Journal O.D. -0.016--0.027 Mag. s. 15 dia. - 0.25 -0.05 Micro- - 0.25 meter Replace -0.05 Micro. meter Replace - 45 -
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 50 and 51: ~~~ ~ ~ I ENGINE MODEL ITEM 1 Free
Page 52 and 53: ~~ ~ I ITEM I MODEL I FREQUENCY OF
Page 54: 15-5 EVERY 500 - 600 HOURS (SEMIANN

EY15V, EY20V - Small Engine Discount

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