Robin America EY15-3 Reference manual

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e-mail: [email protected] • www.robinamerica.com
RS 307 - REVISED
May, 2001
•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 2001 production.
The starting serial numbers are: EY15-3 ; #6000001
EY20-3 ; #6000001
MODEL SUBJECT
EY15-3, EY20-3
SERVICE BULLETIN
Model change of EY15 and EY20

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•DETAIL OF THE CHANGE:
1.) ENGINE DIMENSION
1) EY15-3 STD specification
After the Change
Before the Change

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2) EY15-3 Generator and Pump specification
•DETAIL OF THE CHANGE:
After the Change
Before the Change

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•DETAIL OF THE CHANGE:
Before the Change
After the Change
3) EY20-3 STD specification

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•DETAIL OF THE CHANGE:
2.)CRANKCASE
1) The oil seal will be added in the hole for governor shaft.
After the Change
Before the Change

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•DETAIL OF THE CHANGE:
2) The material of intake valve seat will be changed (EY20-3)
3) The material of exhaust valve seat will be changed (EY15-3, 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.
After the Change
Before the Change

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•DETAIL OF THE CHANGE:
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.
After the Change Before the Change
After the Change Before the Change

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•DETAIL OF THE CHANGE:
9.) TOP RING
The shape of the top ring will be changed.
10.) OIL RING
The specification of the oil ring will be changed.
11.) CAMSHAFT
The material will be changed.
12.) INTAKE VALVE
The distinction mark on vlalve surfaces will be elinimated.
13.) EXHAUST VALVE
The distinction mark on valve surface will be eliminated.
After the Change Before the Change
After the Change Before the Change
After the Change Before the Change

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•DETAIL OF THE CHANGE:
14.) 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).
After the Change Before the Change

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•DETAIL OF THE CHANGE:
15.) 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.
After the Change Before the Change