Robin America EY20 User manual

PARTS
MANUAL
EY20
ENGINE
Model
PUB-EP5705A
Rev. 03/00

© Copyright 2000 Robin America, Inc.
940 Lively Blvd.  Wood Dale, IL 60191  Phone: [phone]  ax: 630-350-8212
e-mail: [email protected] • www.robinamerica.com

- 3 - '00-03
HOW TO USE THIS MANUAL
Robin engines are identified by MODEL, SPECIFICATION, and CODE NUMBER. For each
model there may be many different versions called specifications. Each specification will be
unique in some way. The difference may only be the paint color or it may have a different
type of PTO or some other significant difference.
In order the identify the correct service part number, it is important to confirm the specifica-
tion and code numbers for your engine. The specification and code number together are
know as the PRODUCT NUMBER.
All Robin 4 cycle engines have a Product Number label similar to the label illustrated below.
The Product Number Label has a 15 digit alphanumeric string that consists of the
SPECIFICATION (SPEC) number (11 digits) and the CODE number (4 digits). Please
note the illustration below:
PRODUCT NUMBER LABEL LOCATIONS
PRODUCT NUMBER LABEL
X X X X
SPEC NO. (11 digits) CODE NO. (4 digits)
PRODUCT NO. (15 digits)
E Y 2 0 0

MANUAL LAYOUT
- 4 - '00-03
1. SECTIONNAME Parts are broadly classified according to their functions.
Refer to the Group Index (table of contents) for respective section name.
2. FIG. No. The FIG. number indexes the reference and part numbers to the illustration. Figure numbers
that vary only in the tens place (i.e..: 700 and 710) are in a group of the same section
(i.e..:Electrical Device Group).
3. REF. No . The Reference number identifies the part illustration with the corresponding part number in the
part list.
4. SUBASSEMBLY SUBASSEMBLY parts of part assembly are listed below the assembly part. The subassembly
part reference number is indicated by the number led by "-" such as "-1", "-2".
5. PART NUMBER It is the number assigned for sales unit. Use the PART No. when making an order.
6. DESCRIPTION It is designation of the part.
7. QTY. Quantity of each part used for each product.
8. REMARKS This gives a distinctive feature and/or a supplementary comment for the type, the specification,
and the part concerned. It also shows part number(s) interchangeable for the part.
9. FROM-TO This section shows the CODE No. to indicate the history of progress in which improved parts
have been introduced in the product. The FROM-TO CODE No. helps to identify PART No.
being employed in the product concerned. See the examples below:
- The part is used in the product irrespective of CODE No.
2101- The part is used in the products with CODE No. of 2101 and after this number.
- 2100 The part is used in the products with CODE No. of 2100 and before this number.

GROUP INDEX
Group Name Page
CRANKCASE GROUP ............................................................................... 6
CRANKSHAFT GROUP.............................................................................. 8
INTAKEand EXHAUST GROUP ............................................................... 10
GOVERNOR GROUP ............................................................................... 14
COOLING and STARTING GROUP ......................................................... 18
FUEL,LUBRICANTGROUP ..................................................................... 22
CARBURETORGROUP ........................................................................... 24
ELECTRIC DEVICE GROUP .................................................................... 26
OIL SENSOR ............................................................................................ 30
6:1REDUCTION ....................................................................................... 34
- 5 - '00-03
SYMBOL DESCRIPTION
AY .......................... ASSEMBLY
CP .......................... COMPLETE
EX .......................... EXPORT (from Japan)
FIG......................... FIGURE
FR. ......................... FRONT
" .............................. INCH
INCL.......................INCLUDE
~L ........................... LITER
L= ........................... LENGTH (in. mm)
L.H. (LH) ................LEFT-HAND SIDE
MECH ....................MECHANICAL
NO (NON) .............. NONE
OPT. ....................... OPTIONAL
O.S......................... OVER SIZE
SYMBOL DESCRIPTION
P= .......................... PITCH (in mm)
P.T.O. (PTO) ..........POWER TAKE OFF
REF. .......................REFERENCE
R.H. (RH) ...............RIGHT HAND SIDE
RR. .........................REAR
STD........................ STANDARD
SW .........................SWITCH
T=........................... THICKNESS (in mm)
UN .......................... UNIT
U.S. ........................UNDER SIZE
~V .......................... VOLTAGE
~W .........................WATT
W/ .......................... WITH
W/O........................WITHOUT
INDEX OF DESCRIPTION SYMBOLS

SECTION 1 CRANKCASE GROUP
EY20 - 6 - '00-03
FIG. 100

SECTION 1 CRANKCASE GROUP
EY20 - 7 - '00-03
REF. PART NO. DESCRIPTION QTY. REMARKS FROM-TO FIG.
10 227-10101-21 CRANKCASE, compl. 1 100
20 227-14202-03 VALVE GUIDE 2 100
30 044-02501-50 OIL SEAL 1 100
40 060-02500-10 BALLBEARING 1 100
50 031-00600-20 DOWEL PIN 2 100
60 010-50802-50 STUD 2 100
70 010-50601-20 STUD 2 100
80 040-11400-30 PLUG 2 100
90 021-11400-20 GASKET 2 100
100 050-21000-10 UNION 1 100
110 021-81400-10 SEAL WASHER 1 100
120 040-11000-11 PLUG 1 100
125 021-81000-10 SEAL WASHER 1 100
420 042-01800-10 RUBBERPLUG 1 100
210 227-11002-31 MAIN BEARING COVER, compl. 1 100
220 044-02501-60 OIL SEAL 1 100
230 060-02500-10 BALLBEARING 1 100
250 227-45003-01 GOVERNORGEAR,compl. 1 100
260 205-41901-03 GOVERNORSLEEVE 1 100
270 227-63601-03 OILGAUGE 2 100
280 021-31600-20 GASKET 2 100
290 227-16001-03 GASKET, bearing cover 1 100
300 013-00600-40 BOLT and WASHER, AY 8 100
610 227-13001-13 CYLINDERHEAD 1 100
620 227-15001-11 GASKET,head 1 100
630 011-00800-10 FLANGEBOLT 8 100
810 227-14301-01 TAPPER COVER, compl. 1 100
820 227-14401-01 BREATHERPLATE, compl. 1 100
830 261-16006-03 GASKET,tappet cover 1 100
840 261-16007-03 GASKET, breatherplate 1 100
850 085-10800-00 RUBBERPIPE 1 8 X 11 X M 100
860 011-00600-20 FLANGEBOLT 2 100
900 226-75501-03 GROMMET 1 100
*960 227-99001-07 GASKETSET 1 100
* Gasket Set 227-99001-07 includes the following:
Fig. 100 items 280, 290, 620, 830 and 840
Fig. 300 items 340, 550 and 560
Fig. 310 item 510-2

SECTION 2 CRANKSHAFT GROUP
EY20 - 8 - '00-03
FIG. 200

SECTION 2 CRANKSHAFT GROUP
EY20 - 9 - '00-03
REF. PART NO. DESCRIPTION QTY. REMARKS FROM-TO FIG.
10 227-20905-01 CRANKSHAFT,compl. 1 3/4" key - 5/16 tap 200
227-20904-01 CRANKSHAFT,compl. 1 3/4" key - 3/8 tap 200
227-21002-01 CRANKSHAFT,compl. 1 SAE Pump 200
227-21202-01 CRANKSHAFT,compl. 1 SAE Taper 200
227-20203-01 CRANKSHAFT,compl. 1 Metric Keyed, 20mm 200
227-20302-01 CRANKSHAFT,compl. 1 Metric Pump 200
227-20702-01 CRANKSHAFT,compl. 1 Metric Taper 200
40 023-02501-10 SPACER, T = 0.6 1 Select one piece only 200
023-02501-20 SPACER, T = 0.8 1 Select one piece only 200
023-02501-30 SPACER, T = 1.0 1 Select one piece only 200
50 002-18140-00 NUT 1 200
60 003-20140-00 SPRINGWASHER 1 200
70 032-30300-10 WOODRUFF KEY 1 200
310 227-22501-10 CONNECTINGRODAY 1 200
320 227-23001-13 CONNECTINGRODBOLT 2 200
330 227-23101-03 OILSCRAPER 1 200
350 214-23301-13 PISTONPIN 1 200
360 227-23401-03 PISTON 1 STD 200
227-23402-03 PISTON 1 0.25 Oversize 200
227-23403-03 PISTON 1 0.50 Oversize 200
370 227-23511-07 PISTONRING SET 1 STD 200
227-23512-07 PISTONRINGSET 1 0.25 Oversize 200
227-23513-07 PISTONRINGSET 1 0.50 Oversize 200
380 056-51400-10 CLIP 2 200

SECTION 3 INTAKE and EXHAUST GROUP
EY20 - 10 - '00-03
FIG. 300
COMPRESSION RELEASE
TYPE

SECTION 3 INTAKE and EXHAUST GROUP
EY20 - 11 - '00-03
REF. PART NO. DESCRIPTION QTY. REMARKS FROM-TO FIG.
10 227-31901-21 CAMSHAFT 1 300
227-31702-11 CAMSHAFT 1 CompressionRelease Type 300
35 227-36405-03 RELEASELEVER 1 CompressionRelease Type 300
36 005-19041-00 SPRINGPIN 1 Compression ReleaseType 300
37 003-15220-00 SNAPRING,outer 1 CompressionRelease Type 300
50 227-33301-03 TAPPET 2 300
60 227-33601-03 VALVE SPRING 2 300
70 227-33701-03 SPRINGRETAINER 2 300
80 227-33401-03 INTAKE VALVE 1 300
90 227-33501-13 EXHAUSTVALVE 1 300
310 227-30101-01 MUFFLER,compl. 1 Standard, 6" tall 300
227-30203-01 MUFFLER,compl. 1 Low Noise, 8 3/4" tall 300
317 227-37001-01 MUFFLERBRACKET 1 Low Noise only 300
318 011-00600-20 FLANGEBOLT 1 300
319 011-00600-10 FLANGEBOLT 1 300
320 227-34201-11 MUFFLERCOVER,compl. 1 Standard, 5 1/8" tall 300
227-34210-21 MUFFLERCOVER, compl. 1 Low Noise, 6 3/4" tall 300
340 214-35201-11 GASKET,exhaust 1 300
350 002-19080-00 NUT 2 300
360 011-00600-10 FLANGEBOLT 4 300
540 227-32901-13 INSULATOR 1 300
550 227-35901-03 GASKET, insulator 1 300
560 227-35904-03 GASKET 2, insulator 1 300

EY20 - 12 - '00-03
SECTION 3 INTAKE and EXHAUST GROUP
FIG. 310
520
590
A
BC
-2
Premium - Top Inlet Cyclone
Standard - Cyclone Foam Element

SECTION 3 INTAKE and EXHAUST GROUP
EY20 - 13 - '00-03
REF. PART NO. DESCRIPTION QTY. REMARKS FROM-TO FIG.
510 227-32614-00 AIR CLEANER AY 1 Premium 310A
227-32613-00 AIR CLEANER AY 1 Standard 310B
227-32603-00 AIR CLEANER AY 1 Foam 310C
-2 227-3603-13 GASKET, air cleaner 1 310
520 227-32610-08 ELEMENTSET 1 Premium 310A
226-32610-08 ELEMENTSET 1 Standard 310B
227-36002-03 ELEMENT 1 Foam 310C
570 002-38060-00 FLANGENUT 2 300C
580 001-10061-20 BOLT and WASHER AY 1 310
590 002-17060-00 NUT 2 310
610 227-36501-01 LOCK WASHER 1 310

SECTION 4 GOVERNOR GROUP
EY20 - 14 - '00-03
FIG. 400
MANUAL CONTROL ONLY
MANUAL WITH UPPER REMOTE CABLE CONTROL

SECTION 4 GOVERNOR GROUP
EY20 - 15 - '00-03
REF. PART NO. DESCRIPTION QTY. REMARKS FROM-TO FIG.
10 227-42301-11 GOVERNORLEVER,compl. 1 400
20 227-42201-03 GOVERNORSHAFT 1 400
30 227-42701-01 GOVERNORROD 1 400
40 227-42801-01 RODSPRING, compl. 1 400
50 003-13060-00 CLIP 2 400
60 004-35062-50 BOLT and WASHER AY 1 400
70 018-60600-20 NUT 1 400
80 227-42501-13 GOVERNORSPRING 1 400
310 227-43302-20 SPEEDCONTROL AY 1 400
320 227-43302-01 SPEEDCONTROL 1 400
227-43301-01 SPEEDCONTROL 1 ManualControl Only 400
330 227-43601-03 KNOB 1 400
340 227-43501-13 STOP PLATE 1 400
350 227-45002-03 SPRINGWASHER 1 400
360 004-31063-00 SCREW 1 400
370 002-27060-00 NUT 1 400
380 011-00600-50 FLANGEBOLT 1 400
410 227-44203-13 WIRE BRACKET 1 400
440 004-31040-80 SCREW 1 400
450 002-27060-00 NUT 1 400

SECTION 4 GOVERNOR GROUP
EY20 - 16 - '00-03
FIG. 410 LOWER REMOTE CABLE CONTROL

SECTION 4 GOVERNOR GROUP
EY20 - 17 - '00-03
REF. PART NO. DESCRIPTION QTY. REMARKS FROM-TO FIG.
10 227-42301-11 GOVERNORLEVER,compl. 1 410
20 227-42201-03 GOVERNORSHAFT 1 410
30 227-42701-01 GOVERNORROD 1 410
40 227-42801-01 RODSPRING 1 410
50 003-13060-00 CLIP 2 410
60 001-14062-50 BOLT and WASHER AY 1 410
70 018-60600-20 NUT 1 410
80 226-42503-03 GOVERNORSPRING 1 410
200 226-43301-20 SPEED CONTROLAY 1 410
210 011-60400-10 BOLT 1 410
230 004-31053-00 SCREW 1 410
240 002-17050-00 NUT 1 410
280 226-43101-01 LINKPIVOT 1 410
390 226-44201-13 WIRE BRACKET 1 410
420 011-00600-30 FLANGEBOLT 1 410

SECTION 5 COOLING and STARTING GROUP
EY20 - 18 - '00-03
FIG. 500

REF. PART NO. DESCRIPTION QTY. REMARKS FROM-TO FIG.
10 227-51538-06 BLOWERHOUSING 1 Black 500
227-51350-07 BLOWERHOUSING 1 Primer 500
227-51328-06 BLOWERHOUSING 1 Orange 500
227-51304-06 BLOWERHOUSING 1 Yellow 500
20 227-91529-03 LABEL, trademark 1 500
40 011-00600-30 FLANGEBOLT 4 500
60 227-52601-03 CYLINDER BAFFLE 1 500
80 011-00600-10 FLANGEBOLT 1 500
90 227-52701-03 HEADCOVER 1 500
95 001-65062-00 FLANGEBOLT 1 500
SECTION 5 COOLING and STARTING GROUP
EY20 - 19 - '00-03

SECTION 5 COOLING and STARTING GROUP
EY20 - 20 - '00-03
FIG. 510
NEW STYLE
OLD STYLE