Subaru EX40 Parts Manual EP6516 Rev 06 12 User To The 31061a7a B23f 4734 Bfc4 8ce7411517b8
User Manual: Subaru EX40 to the manual
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PARTS 
MANUAL 
Models 
EX40 
ENGINES 
PUB-EP6516 
Rev. 04/14 
© Copyright 2009 Robin America, Inc.
Robin America, Inc.
905 Telser Road, Lake Zurich, IL 60047 • Phone: 847-540-7300 • Fax:847-438-5012
e-mail: sales@robinamerica.com • www.subarupower.com

HOW TO USE THIS MANUAL
Robin engines are identifi ed by MODEL, SPECIFICATION, and CODE NUMBER. For each 
model there may be many different versions called specifi cations. Each specifi cation 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 signifi cant difference.
In order the identify the correct service part number, it is important to confi rm the specifi ca-
tion and code numbers for your engine. The specifi cation 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:
X X X X
SPEC NO. (11 digits) CODE NO. (4 digits)
PRODUCT NO. (15 digits)
E X 4 0 0

MANUAL LAYOUT
1.  SECTION NAME  Parts are broadly classifi ed 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 identifi es 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 specifi cation, 
      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.
1
23
4
16792
8
3
5
4

GROUP INDEX
Group Name  Page
CRANKCASE GROUP ............................................................................... 6
CRANKSHAFT GROUP ............................................................................. 8
INTAKE and EXHAUST GROUP .............................................................. 10
GOVERNOR GROUP .............................................................................. 14
COOLING and STARTING GROUP ......................................................... 16
FUEL, LUBRICANT GROUP .................................................................... 18
CARBURETOR GROUP .......................................................................... 20
ELECTRIC DEVICE GROUP  .................................................................. 22
ACCESSORY GROUP ............................................................................. 24
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

EX40  - 6 -  08-09
SECTION 1  CRANKCASE GROUP
FIG. 100
260
250
270
280
220
210
230
240
300
10
50
40
45
75 30
700
90
80
70 20 28
27 26
60
620
631 630
690 680
710
610

EX40  - 7 -  08-09
Ref. Part Number  Description  Qty Remarks  To-From  Fig.
SECTION 1  CRANKCASE GROUP
10 20B-10102-11 Crankcase Cp  1     100
20 20B-14202-03 Valve Guide  2     100
26  132-07AA0-50  Seal, intake valve  1      100
27 056-51000-50 Clip  1     100
28 263-35341-03 Retainer Plate  1     100
30 044-03500-90 Oil Seal  1     100
40 060-03502-40 Ball Bearing  1     100
45 X60-01500-11 Ball Bearing  1     100
50 277-15011-03 Pipe Knock  2     100
60 010-50603-51 Stud, intake  2     100
70 010-50802-90 Stud, exhaust  2     100
75 044-00800-10 Oil Seal  1     100
80 040-11400-30 Plug  1     100
90 021-11400-20 Gasket  1     100
210  20B-11002-11  Main Bearing Cover Cp  1      100
220 044-03500-90 Oil Seal  1      100
230 060-03502-40 Ball Bearing  1      100
240 X60-01500-11 Ball Bearing  1      100
250  20B-45003-01  Governor Gear Cp  1      100
260 277-41901-03 Governor Sleeve  1      100
270 279-63601-30 Oil Gauge Ay  1    8157-  100
 224-63601-03 Oil Gauge  1   -8156  100
280 021-32000-50 Gasket  1      100
300 011-00803-40 Flange Bolt  8      100
610  20B-13001-01  Cylinder Head Cp  1      100
620  20B-15001-03  Gasket, cylinder head  1      100
630 011-01000-40 Flange Bolt  4      100
631 001-04083-50 Flange Bolt  2      100
680  20B-15501-01  Rocker Cover Cp  1      100
690  20B-16001-03  Gasket, rocker cover  1      100
700 031-00600-20 Dowel Pin  2      100
710 011-00600-20 Flange Bolt  4      100
960 20B-99001-07 Gasket Set  1      100

EX40  - 8 -  08-09
SECTION 2  CRANKSHAFT GROUP
FIG. 200
310
320
360 370
380
350
10
70
390

EX40  - 9 -  08-09
Ref. Part Number  Description  Qty Remarks  To-From  Fig.
SECTION 2  CRANKSHAFT GROUP
10  20B-20901-01  Crankshaft Cp  1  1" Key    200
 20B-21201-01 Crankshaft Cp  1 7/8" Taper    200
  20B-21001-01  Crankshaft Cp  1  1" Pump    200
70 005-32054-01 Woodruff Key  1     200
310 20B-22501-00 Connecting Rod Ay  1      200
320  001-05084-00  Connecting Rod Bolt  2      200
350 263-23301-33 Piston Pin  1      200
360  20B-23401-H3  Piston    1  Std    200
360  20B-23403-H3  Piston   1  Oversize 0.25mm    200
360  20B-23404-H3  Piston   1  Oversize 0.50mm    200
370  20B-23501-07  Piston Ring Set  1  Std    200
370  20B-23502-07  Piston Ring Set  1  Oversize 0.25mm    200
370  20B-23503-07  Piston Ring Set  1  Oversize 0.50mm    200
380 056-52100-20 Clip  2      200
390 20B-24101-03 Balancer Shaft  1      200

EX40  - 10 -  08-09
SECTION 3  INTAKE and EXHAUST GROUP 
FIG. 300
350
310
365
315
317
340
80
90
290
225
241 231
210
240
230
60
70
220
95
320
361
170
25
27
37 35 34 38
166 163 160
10
150
370

SECTION 3        INTAKE and EXHAUST GROUP
Ref. Part Number Description Qty Remarks To-From Fig.
10 20B-31601-01 Camshaft Cp 1300
25 20B-35101-03 Pin, camshaft 1300
27 024-00700-20 O ring 1300
34 005-19041-00 Pin, spring 2300
35 277-36401-03 Release lever 1300
37 20B-36501-03 Clip 1300
38 277-38702-03 Return Spring 1300
60 246-33611-03 Valve Spring 2300
70 246-33711-13 Spring Retainer 2300
80 20B-33401-H3 Intake Valve 1300
90 20B-33501-H3 Exhaust Valve 1300
95 246-35501-03 Collet Valve 4300
150 20B-35601-H1 Timing Chain 1300
160 277-36911-03 Tentioner 1300
163 277-37101-03 Spring, tentioner 1300
166 277-36902-03 Pin, tentioner 1300
170 277-36913-13 Chain Guide 1300
200 20B-35001-01 Pin, rocker 1300
210 003-13060-00 Clip 1300
220 20B-36101-00 Rocker Arm Ay, intake 1300
225 20B-36102-10 Rocker Arm Ay, exhaust 1300
230 014-90500-20 Adjust Screw 1300
231 014-90500-20 Adjust Screw 1300
240 017-00500-30 Nut 1300
241 017-00500-30 Nut 1300
290 011-00600-20 Flange Bolt 1300
310 20B-30101-J2 Muffler 1300
315 20B-37001-01 Deflector Cp 1300
317 015-00400-60 Tapping Screw 3300
320 20B-34201-11 Muffler Cover Cp 1300
340 20B-35201-03 Gasket, muffler 1300
350 980-20082-80 Flange Nut 2300
361 011-00600-10 Flange Bolt 5300
365 011-00803-20 Flange Bolt 1300
370 267-37601-01 Spark Arrestor 1300
EX40                                                                                             - 11 -                                                                              04-14

EX40  - 12 -  08-09
SECTION 3  INTAKE and EXHAUST GROUP
FIG. 310$
200 290
295
280
250
510
520
270
220
260


SECTION 3        INTAKE and EXHAUST GROUP
Ref. Part Number Description Q1ty Remarks To-From Fig.
510 20B-32611-H0 Air Cleaner Ay 1Dual 310A
510 20B-32651-H0 Air Cleaner Ay 1310B
200 20B-32630-H8 Cleaner Body 1310A
220 20B-32720-H8 Gasket, packing 1310A&B
250 20B-32640-H8 Cover 1310A
250 20B-32641-H8 Cover 1310B
254 20B-32680-H8 Clip1 2310B
260 20B-32850-H8 Cap 1310A
270 20B-32650-H8 Bolt 1310A
280 X85-11001-80 Rubber Pipe, breather 1310A
290 002-38060-00 Flange Nut 2310A
295 001-04061-60 Flange Bolt 1310A
520 20B-32610-H7 Element 1310A&B
EX40                                                                     - 13 -                                                                        04-14

EX40  - 14 -  08-09
SECTION 4  GOVERNOR GROUP 
FIG. 400
80
30
40
450
340
345
310
311
355
480
10
70
60
485
360
370
435 396
395
436
50
90
20 50
490

EX40  - 15 -  08-09
Ref. Part Number  Description  Qty Remarks  To-From  Fig.
SECTION 4  GOVERNOR GROUP  
10  20B-42301-03  Governor Lever   1      400
20 20B-42201-13 Governor Shaft  1     400
30 20B-42701-01 Governor Rod  1     400
40 20B-42801-13 Rod Spring  1     400
50 003-13060-00 Clip  2     400
60  001-14062-50  Bolt and Washer  1      400
70 018-60600-20 Nut  1     400
80 20B-42503-13 Governor Spring  1     400
90 003-11080-00 Washer  1     400
310  20B-43301-01  Speed Control Lever Cp  1  Std    400
  20B-43351-03  Speed Control Lever  1  Generator    400
311 011-60400-30 Bolt, swivel  1     400
340 227-43501-13 Stop Plate  1      400
345 227-45002-03 Spring Washer  1      400
355 021-70600-30 Friction Washer  2      400
360 004-31061-80 Screw, panhead  1      400
370 002-27060-00 Nut  1      400
395 277-43902-03 Clamp  1      400
396  013-10500-30  Screw and Washer  1      400
435  20B-46001-11  Speed Control Bracket Cp  1      400
436 20B-35903-03 Gasket 3  1      400
450  002-35060-00  Self Lock Nut  1      400
480 267-45101-03 Return Spring  1      400
485 011-00600-20 Flange Bolt  1      400

EX40  - 16 -  08-09
SECTION 5  COOLING and STARTING GROUP   
FIG. 500
707
705
706
220
210
20
80
60 40
16
10
15
17
61
81
18

EX40  - 17 -  08-09
Ref. Part Number  Description  Qty Remarks  To-From  Fig.
SECTION 5   COOLING and STARTING GROUP 
490 277-96107-03 Label, hi-low  1      400
10 20B-51201-H1 Blower Housing  1     500
15  20B-55101-02  Recoil Bracket Un  1      500
16 010-00804-40 Bolt  2     500
17 010-00804-50 Bolt  2     500
18 002-38060-00 Flange Nut  4     500
20 073-20054-70 Label, trademark  1     500
40 001-04061-60 Flange Bolt  5     500
60 001-65081-20 Bolt  1     500
61 20B-52702-H1 Baffl e 2, head  1      500
80 279-52711-11 Baffl e 1, case  1      500
81 011-00600-20 Flange Bolt  3     500
220  013-00602-81  Bolt and Washer Ay  4      500
705  KU3-11077-01  Float C/U Cp11  1      500
706  20B-73102-01  Wire 2 Cp  1      500

EX40  - 18 -  08-09
SECTION 5  COOLING and STARTING GROUP   
FIG. 520
-1
-4
-7
210
-5
-9
-6
-11
-8
-2
-3
-10

EX40  - 19 -  08-09
Ref. Part Number  Description  Qty Remarks  To-From  Fig.
SECTION 5   COOLING and STARTING GROUP 
210 20B-50301-00 Recoil Starter Ay  1      520
-1 20B-50145-08 Starter Pulley  1     520
-2 261-50100-08 Starter Knob  1     520
-3 20B-50110-08 Starter Rope  1     520
-4 20B-50101-08 Set Screw  1     520
-5 161-50150-08 Ratchet Guide  1     520
-6 227-50135-08 Return Spring  2     520
-7 227-50131-08 Friction Spring  1     520
-8 277-50155-08 Spiral Spring  1     520
-9  161-50125-08  Ratchet    2      520
-10 20B-50120-08 Reel  1     520
-11 20B-50150-08 Starter Case  1     520

EX40  - 20 -  08-09
SECTION 6  FUEL, LUBRICATION GROUP 
FIG. 600
40 23
30
10
20
52
60 63
59
53
51
54
50
58
55 56
57
210
560 550
540

EX40  - 21 -  08-09
Ref. Part Number  Description  Qty Remarks  To-From  Fig.
SECTION 6  FUEL, LUBRICATION GROUP
707  004-36041-20  Screw and Washer Ay  2      500
10 20B-60102-01 Fuel Tank Cp  1     600
20 073-20051-81 Label, warning  1     600
23 20B-95101-03 Label, model  1     600
30  X43-04401-61  Fuel Tank Cap Cp  1      600
40 X64-13600-10 Fuel Filter  1     600
50 X64-20122-00 Fuel Strainer Ay  1     600
51  267-62604-11  Fuel Pipe Cp  1  fuel tank strainer    600
52 X85-10614-91 Rubber Pipe  1     600
53  X56-11100-60  Hose Clamp  1  fuel pipe, strainer    600
54  056-11200-40  Hose Clamp  1  fuel pipe, tank    600
55  20B-62601-01  Fuel Pipe Cp  1  strainer, carb    600
56 085-10620-90 Rubber Pipe  1     600
57  056-11000-30  Hose Clamp  2  fuel pipe    600
58 011-00600-20 Flange Bolt  1     600
59 056-81200-10 Clamp  1     600
60 002-38080-00 Flange Nut  2     600
63 011-00802-50 Flange Bolt  2     600
540 20B-32901-J1 Insulator Cp  1      600
550  20B-35901-H3  Gasket 1, insulator  1      600

EX40  - 22 -  08-09
SECTION 6  FUEL, LUBRICATION GROUP 
FIG. 610

EX40  - 23 -  08-09
Ref. Part Number  Description  Qty Remarks  To-From  Fig.
SECTION 6  FUEL, LUBRICATION GROUP
560  20B-35902-H3  Gasket 2, insulator  1      600
210 20B-62301-00 Carburetor Ay  1  Std    640

EX40  - 24 -  08-09
SECTION 7  ELECTRIC DEVICE GROUP  
FIG. 700
770
775
740
700
733
385
384
15 16
10
785
780
100
30
50
110
11
35
12
20

EX40  - 25 -  08-09
Ref. Part Number  Description  Qty Remarks  To-From  Fig.
SECTION 7  ELECTRIC DEVICE  GROUP  
 20B-62302-00 Carburetor Ay  1 Generator    640
10 20B-79230-H1 Flywheel Cp  1 Std    700
  20B-79241-H1  Flywheel Cp  1  15 Watt    700
11 20B-79430-H1 Ignition Coil  1     700
12  20B-79301-H1  Charge Coil  1  15 Watt    700
15 20B-54101-H3 Cooling Blower  1     700
16 018-01800-10 Flange Nut  1     700
20 20B-71002-03 Ring Gear  1     700
30  001-14062-50  Bolt and Washer Ay  2      700
35  004-35062-00  Screw and Washer Ay  2      700
50 20B-73101-01 Wire 1  1     700
100 065-01401-50 Spark Plug  1      700
110  065-50003-11  Spark Plug Cap  1      700
384 056-60002-50 Clamp  1      700
385 011-00600-10 Flange Bolt  1      700
700 279-76301-51 Oil Sensor  1      700
733 277-75801-03 Shield Plate  1      700
740  013-00602-60  Bolt and Washer  2      700
770 20B-75501-03 Wire Clamp  1      700
775 015-20600-50 Tapping Bolt  1      700
780  214-79006-01  Clamp Cp  1  stop wire    700
785 011-00600-10 Flange Bolt  1  clamp    700

EX40  - 26 -  08-09
SECTION 7  ELECTRIC DEVICE GROUP - ELECTRIC STARTER  
FIG. 710
1
13
19
20 12
18
6
4
3
5
10
11
17
15
9
14 8
7
16
2
120

EX40  - 27 -  08-09
Ref. Part Number  Description  Qty Remarks  To-From  Fig.
SECTION 7  ELECTRIC DEVICE  GROUP - ELECTRIC STARTER  
120 279-70502-00 Starting Motor Ay  1      710
-1 209-70550-08 Yoke Cp  1     710
-2 209-70551-08 Brush  4     710
-3 209-70545-08 Brush Spring  4     710
-4 209-70530-08 Brush Holder  1     710
-5 209-70552-08 Insulator   1     710
-6 209-70554-08 Armature Ay  1     710
-7  209-70521-08  Over Running Clutch Cp  1      710
-8 279-70550-08 Housing Cp  1     710
-9 209-70511-08 Bush  1     710
-10 209-70505-18 Frame Cp  1     710
-11 209-70510-08 Bush  1     710
-12 209-70525-08 Lever  1     710
-13  279-70515-18  Magnet Switch Cp  1      710
-14 234-70555-08 Pinion Stopper  1     710
-15 209-70557-18 Snap Ring  1     710
-16 209-70558-08 Through Bolt  2     710
-17 949-29970-02 Nut  2     710
-18 209-70560-08 Nut  1     710
-19 107-70652-08 Spring Washer  1     710
-20 211-70584-08 Nut  1     710

EX40  - 28 -  08-09
SECTION 7  ELECTRIC DEVICE GROUP - CONTROL BOX
FIG. 720
387
386
200
388
210
385
55
220
335
260
190
130
131
387
385
230
240

EX40  - 29 -  08-09
Ref. Part Number  Description  Qty Remarks  To-From  Fig.
SECTION 7  ELECTRIC DEVICE  GROUP - CONTROL BOX
55 277-73105-01 Wire 5  1      720
130 214-79007-01 Bolt, starter  2      720
131 003-10080-00 Washer  2      720
190 073-20044-80 Label, battery  1      720
200  20B-75101-01  Control Box Cp  1      720
210  073-20044-70  Label, starter switch  1      720
220 066-00003-30 Switch Ay  1      720
-1 066-00099-80 Key  1      720
230 277-71401-01 Diode Rectifi er Cp  1      720
240  044-35061-00  Screw and Washer Ay  1      720
260  277-73103-11  Wire 3 Cp  1      720
335  277-73104-01  Wire 4 Cp  1      720
385 056-30000-60 Wire Band  1      720
385  20B-76511-01  Bracket Cp, SEL  1      720
386 056-60002-50 Clamp, sel  1      720
387 011-00600-20 Flange Bolt  3      720
388  013-50600-10  Bolt and Washer Ay  2      720

EX40  - 30 -  08-09
SECTION 9  ACCESSORY GROUP 
FIG. 900

EX40  - 31 -  08-09
Ref. Part Number  Description  Qty Remarks  To-From  Fig.
SECTION 9  ACCESSORY GROUP
10 224-90303-00 Accessory Tool Kit  1      900

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