Robin EY20 PARTS LIST

PARTS
MANUAL

Model

EY20
ENGINE

PUB-EP5705A
Rev. 03/00

940 Lively Blvd.  Wood Dale, IL 60191  Phone: [phone]  Fax: [phone]

e-mail: [e-mail] • www.robinamerica.com

© Copyright 2000 Robin America, Inc.

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 specifica­tion 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.

PRODUCT NUMBER LABEL

PRODUCT NUMBER LABEL LOCATIONS

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:

E Y 2 0 0

SPEC NO. (11 digits) CODE NO. (4 digits)

PRODUCT NO. (15 digits)

- 3 - '00-03

X X X X

MANUAL LAYOUT

1. SECTION NAME 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.

- 4 - '00-03

GROUP INDEX

Group Name Page

CRANKCASE GROUP ............................................................................... 6

CRANKSHAFT GROUP.............................................................................. 8

INT AKE and EXHAUST GROUP ............................................................... 10

GOVERNOR GROUP ............................................................................... 14

COOLING and STARTING GROUP ......................................................... 18

FUEL, LUBRICANT GROUP ..................................................................... 22

CARBURETOR GROUP ........................................................................... 24

ELECTRIC DEVICE GROUP .................................................................... 26

OIL SENSOR ............................................................................................ 30

6:1 REDUCTION ....................................................................................... 34

INDEX OF DESCRIPTION SYMBOLS

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

- 5 - '00-03

SECTION 1 CRANKCASE GROUP

FIG. 100

EY20 - 6 - '00-03

SECTION 1 CRANKCASE GROUP

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 10 0
40 060-02500-10 BALL BEARING 1 10 0
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 RUBBER PLUG 1 100
210 227-11002-31 MAIN BEARING COVER, compl. 1 100
220 044-02501-60 OIL SEAL 1 100
230 060-02500-10 BALL BEARING 1 100
250 227-45003-01 GOVERNOR GEAR, compl. 1 100
260 205-41901-03 GOVERNOR SLEEVE 1 100
270 227-63601-03 OIL GAUGE 2 10 0
280 021-31600-20 GASKET 2 100
290 227-16001-03 GASKET, bearing cover 1 100
300 013-00600-40 BOLT and W ASHER, AY 8 100
610 227-13001-13 CYLINDER HEAD 1 100
620 227-15001-1 1 GASKET , head 1 100
630 011-00800-10 FLANGE BOLT 8 100
810 227-14301-01 TAPPER COVER, compl. 1 100
820 227-14401-01 BREATHER PLATE, compl. 1 10 0
830 261-16006-03 GASKET, tappet cover 1 100
840 261-16007-03 GASKET , breather plate 1 100
850 085-10800-00 RUBBER PIPE 1 8 X 11 X M 100
860 011-00600-20 FLANGE BOLT 2 100
900 226-75501-03 GROMMET 1 100

*960 227-99001-07 GASKET SET 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

EY20 - 7 - '00-03

SECTION 2 CRANKSHAFT GROUP

FIG. 200

EY20 - 8 - '00-03

SECTION 2 CRANKSHAFT GROUP

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 T aper 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 SPRING WASHER 1 200
70 032-30300-10 WOODRUFF KEY 1 200

310 227-22501-10 CONNECTING ROD AY 1 200
320 227-23001-13 CONNECTING ROD BOLT 2 200
330 227-23101-03 OIL SCRAPER 1 200
350 214-23301-13 PISTON PIN 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 PISTON RING SET 1 ST D 200

227-23512-07 PISTON RING SET 1 0.25 Oversize 200

227-23513-07 PISTON RING SET 1 0.50 Oversize 200

380 056-51400-10 CLIP 2 200

EY20 - 9 - '00-03

SECTION 3 INTAKE and EXHAUST GROUP

FIG. 300

COMPRESSION RELEASE

TYPE

EY20 - 10 - '00-03

SECTION 3 INTAKE and EXHAUST GROUP

REF. PART NO. DESCRIPTION QTY. REMARKS FROM-TO FIG.

10 227-31901-21 CAMSHAFT 1 300

227-31702-11 CAMSHAFT 1 Compression Release Type 30 0
35 227-36405-03 RELEASE LEVER 1 Compression Release Type 30 0
36 005-19041-00 SPRING PIN 1 Compression Release T ype 300
37 003-15220-00 SNAP RING, outer 1 Compression Release T ype 300
50 227-33301-03 TAPPET 2 300
60 227-33601-03 V AL VE SPRING 2 300
70 227-33701-03 SPRING RETAINER 2 300
80 227-33401-03 INTAKE VALVE 1 300
90 227-33501-13 EXHAUST VA LVE 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 30 0

317 227-37001-01 MUFFLER BRACKET 1 Low Noise only 300
318 011-00600-20 FLANGE BOLT 1 300
319 011-00600-10 FLANGE BOLT 1 300
320 227-34201-1 1 MUFFLER COVER, compl. 1 Standard, 5 1/8" tall 300

227-34210-21 MUFFLER COVER, 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 FLANGE BOLT 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 - 11 - '00-03