PARTS
MANUAL
Models
EH722
ENGINES
PUB-EP
Rev. 03/10
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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:
E H 7 2 2
X X X X
SPEC NO. (11 digits)
CODE NO. (4 digits)
PRODUCT NO. (15 digits)
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MANUAL LAYOUT
1
4
3
2
1
3
9
6
7
2
5
4
8
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
6. DESCRIPTION
7. QTY.
It is the number assigned for sales unit. Use the PART No. when making an order.
It is designation of the part.
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:
-
2101-
- 2100
The part is used in the product irrespective of CODE No.
The part is used in the products with CODE No. of 2101 and after this number.
The part is used in the products with CODE No. of 2100 and before this number.
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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 .................................................................. 24
ACCESSORY GROUP............................................................................. 26
INDEX OF DESCRIPTION SYMBOLS
SYMBOL
DESCRIPTION
SYMBOL
DESCRIPTION
AY...........................ASSEMBLY
CP...........................COMPLETE
EX...........................EXPORT (from Japan)
FIG..........................FIGURE
P=...........................PITCH (in mm)
P.T.O. (PTO) ...........POWER TAKE OFF
REF.........................REFERENCE
R.H. (RH)................RIGHT HAND SIDE
RR. .........................REAR
FR...........................FRONT
" ..............................INCH
INCL. ......................INCLUDE
~L............................LITER
L= ...........................LENGTH (in. mm)
L.H. (LH).................LEFT-HAND SIDE
MECH.....................MECHANICAL
NO (NON)...............NONE
STD. .......................STANDARD
SW..........................SWITCH
T= ...........................THICKNESS (in mm)
UN ..........................UNIT
U.S..........................UNDER SIZE
~V...........................VOLTAGE
~W..........................WATT
OPT.........................OPTIONAL
O.S. ........................OVER SIZE
W/ ...........................WITH
W/O ........................WITHOUT
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SECTION 1
CRANKCASE GROUP
FIG. 100
EH722
- 6 -
03-10
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SECTION 1
CRANKCASE GROUP
Ref. Part Number Description
Qty Remarks
To-From
Fig.
10
20
21
22
23
26
27
28
29
40
50
55
60
61
75
80
280-10101-C1 Crankcase Cp
263-14211-03 Valve Guide
056-51000-50 Clip
263-14211-03 Valve Guide
056-51000-50 Clip
132-11AA1-10 Seal, exhaust valve
132-11AA1-10 Seal, exhaust valve
263-35341-03 Retainer Plate
263-35341-03 Retainer Plate
263-15802-03 Main Bearing
X31-00800-80 Dowel Pin
263-55601-03 Pipe
010-50802-90 Stud
010-50802-90 Stud
044-00800-10 Oil Seal
X40-11400-30 Plug
263-15911-A1 Blind Plug Cp
021-11400-20 Gasket
159-65401-03 Pipe, pulse
263-76102-H1 Oil Pressure Switch
263-11004-E1 Main Bearing Cover Cp
044-04200-30 Oil Seal
X60-04500-10 Ball Bearing
263-45001-C1 Governor Gear Cp
263-46215-A3 Thrust Bearing
263-46214-A3 Washer
277-41901-03 Governor Sleeve
263-16002-A3 Gasket, main bearing cover
X11-00802-20 Flange Bolt
20K-13001-A1 Cylinder Head 1 Cp
20K-13101-A1 Cylinder Head 2 Cp
280-15001-13 Gasket 1, cylinder head
280-15101-13 Gasket 2, cylinder head
X11-01000-70 Flange Bolt
280-15501-A3 Rocker Cover
263-15501-A3 Rocker Cover
263-16101-A3 Gasket, rocker cover
X31-00600-20 Dowel Pin
1
2
1
2
1
1
1
1
1
1
2
2
4
4
1
2
1
2
1
1
1
1
1
1
1
2
1
1
10
1
1
1
1
8
1
1
2
4
8
2
1
1
2
2
1
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
85
90
130
200
210
220
230
250
255
257
260
290
300
610
615
620
621
630
680
681
690
700
710
800
810
820
830
860
960
X11-00601-01 Flange Bolt
280-19001-A3 Hook
263-14301-03 Breather Cover
280-14401-A1 Breather Plate Cp
263-16006-03 Gasket, breather plate
X11-00600-30 Flange Bolt
280-99001-17 Gasket Set
EH722
- 7 -
03-10
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SECTION 2
CRANKSHAFT GROUP
FIG. 200
EH722
- 8 -
03-10
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SECTION 2
CRANKSHAFT GROUP
Ref. Part Number Description
Qty Remarks
To-From
Fig.
10
40
41
42
50
65
70
280-21101-C1 Crankshaft Cp
263-25012-A3 Spacer
263-25013-A3 Spacer
1
1
1
1
1
1
1
2
2
4
2
2
2
2
2
2
2
4
200
200
200
200
200
200
200
200
200
200
200
200
200
200
200
200
200
200
263-25014-A3 Spacer
X18-01800-10 Flange Nut
003-10180-00 Washer
005-32054-01 Woodruff Key
310 263-22601-20 Connecting Rod Ay
311 263-22602-10 Connecting Rod Ay
320 001-05084-00 Flange Bolt
350 263-23301-33 Piston Pin
360 280-23411-H3 Piston
361 280-23412-H3 Piston
362 280-23413-H3 Piston
370 280-23501-07 Piston Ring Set
371 280-23502-07 Piston Ring Set
372 280-23503-17 Piston Ring Set
380 056-52100-20 Clip
Undersize 0.25mm
Std
Oversize 0.25mm
Oversize 0.50mm
Std
Oversize 0.25mm
Oversize 0.50mm
EH722
- 9 -
03-10
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SECTION 3
INTAKE and EXHAUST GROUP
FIG. 300
EH722
- 10 -
03-10
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SECTION 3
INTAKE and EXHAUST GROUP
Ref. Part Number Description
Qty Remarks
To-From
Fig.
10
50
60
70
80
90
95
280-31801-03 Camshaft
263-33301-A3 Tappet
1
4
4
4
2
2
8
4
4
4
4
4
2
1
4
4
1
1
1
2
3
4
1
1
2
1
1
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
246-33611-03 Valve Spring
246-33711-13 Spring Retainer
263-33401-03 Intake Valve
263-33502-13 Exhaust Valve
246-35501-03 Collet Valve
210 263-35322-A1 Push Rod Cp
220 267-36102-03 Rocker Arm
230 263-35801-03 Bolt, pivot
235 267-35701-03 Pivot
240 X17-00601-10 Nut
260 263-37002-A3 Guide Plate
500 280-33005-H1 Intake Manifold Cp
505 010-50601-91 Stud
507 002-38060-00 Flange Nut
530 280-35622-03 Gasket, cleaner
538 280-35501-03 Gasket, adapter
550 280-66202-03 Gasket, carburetor
555 263-35503-A3 Gasket, intake manifold
580 X11-00600-20 Flange Bolt
590 002-38080-00 Flange Nut
700 280-38001-03 Cleaner Adapter
850 280-18001-03 Breather Pipe
853 263-68512-A3 Hose Clamp
866 X42-30600-30 Cap, vinyl
920 20K-91701-A3 Label, trademark
EH722
- 11 -
03-10
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SECTION 3
INTAKE and EXHAUST GROUP
FIG. 330
EH722
- 12 -
03-10
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SECTION 3
INTAKE and EXHAUST GROUP
Ref. Part Number Description
Qty Remarks
To-From
Fig.
510 20K-32601-A0 Air Cleaner Ay
512 280-32626-A1 Cleaner Base Cp
514 263-32630-03 Cleaner Cover
516 263-32640-01 Wing Nut
1
1
1
1
1
315
315
315
315
315
520 263-32610-A1 Cleaner Element CP
EH722
- 13 -
03-10
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SECTION 4
GOVERNOR GROUP
FIG. 400
EH722
- 14 -
03-10
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SECTION 4
GOVERNOR GROUP
Ref. Part Number Description
Qty Remarks
To-From
Fig.
10
20
25
26
30
40
50
60
263-42301-B3 Governor Lever
263-42201-A3 Governor Shaft
X23-00801-50 Spacer
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
1
2
2
1
1
2
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
003-10080-00 Washer
20K-42701-A3 Governor Rod
20K-42801-B3 Governnor Rod Spring
005-11060-01 Snap Pin
001-14063-00 Bolt and Washer Ay
X18-60600-20 Nur
263-42501-A3 Governor Spring
280-46011-A3 Choke Control Rod
261-45201-03 Return Spring
280-46001-03 Choke Control Link
226-43101-A1 Link Pivot
263-43901-A3 Choke Knob
263-46010-03 Clamp, choke knob
X15-20500-10 Tapping Screw
20K-43301-A3 Sped Control Lever
227-43501-13 Stop Plate
70
80
130
140
170
180
190
195
197
310
340
350
355
360
370
381
395
396
435
465
485
263-45002-03 Spring Washer
021-70600-30 Friction Washer
X11-50500-20 Bolt
002-27050-00 Nut
X17-60600-20 Self Lock Nut
261-43901-03 Clamp, choke knob
001-17052-00 Bolt and Washer Ay
263-45011-A2 Bracket Un, speed control
X84-14320-00 Rubber Foam
X11-00600-20 Flange Bolt
EH722
- 15 -
03-10
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SECTION 5
COOLING and STARTING GROUP
FIG. 500
EH722
- 16 -
03-10
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SECTION 5
COOLING and STARTING GROUP
Ref. Part Number Description
Qty Remarks
To-From
Fig.
500
500
500
500
500
500
500
500
500
500
500
500
10
25
40
280-51202-A2 Blower Housing Un
073-20057-60 Label, warning
X11-00600-30 Flange Bolt
1
1
8
1
1
1
1
6
1
1
4
2
60
61
62
63
263-52612-A1 Cylinder Baffle 1 Cp
280-52701-C1 Cylinder Baffle 2 Cp
280-52801-A2 Cylinder Baffle 3 Un
263-52912-A2 Cylinder Baffle 4 Un
X11-00600-20 Flange Bolt
80
81
X11-00600-20 Flange Bolt
110
113
145
263-54101-A2 Cooling Blower Un
001-14061-60 Bolt and Washer Ay
X11-00600-10 Flange Bolt
EH722
- 17 -
03-10
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SECTION 6
FUEL, LUBRICATION GROUP
FIG. 600
EH722
- 18 -
03-10
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SECTION 6
FUEL, LUBRICATION GROUP
Ref. Part Number Description
Qty Remarks
To-From
Fig.
55
80
81
90
263-65012-A3 Fuel Filter
X85-10615-42 Rubber Pipe
X85-10613-81 Rubber Pipe
263-68501-03 Hose Clamp
263-68501-03 Hose Clamp
085-10301-10 Rubber Pipe
206-75501-A1 Clamp Cp
263-63604-11 Gauge Cp, oil level
263-63622-01 Guide Cp
1
1
1
2
2
1
1
1
1
2
1
1
1
2
9
1
1
1
1
1
4
1
1
1
1
1
1
1
1
1
600
600
600
600
600
600
600
600
600
600
600
600
600
600
600
600
600
600
600
600
600
600
600
600
600
600
600
600
600
600
91
230
235
270
272
280
510
515
522
523
540
610
615
620
623
625
640
650
653
660
670
673
677
680
714
718
024-01000-10 O ring
267-62201-10 Fuel Pump Ay
263-65002-A3 Bracket, fuel pump
X85-10616-30 Rubber Pipe
263-68501-03 Hose Clamp
X11-00600-20 Flange Bolt
263-63901-13 Inner Rotor
263-63902-13 Outer Rotor
263-64002-A1 Oil Pump Cover Cp
044-03501-70 Oil Seal
X24-08900-30 O ring
X11-00600-30 Flange Bolt
263-64302-02 Oil Pump Filter Un
263-65011-A3 Flange Bolt
248-65801-00 Oil Filter Ay
X40-11400-50 Plug, oil relief
003-70140-00 Gasket, aluminum
263-66001-03 Spring, relief valve
006-90308-00 Steel Ball
280-63602-A1 Oil Filler Cap Cp
263-64414-A3 O ring
EH722
- 19 -
03-10
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SECTION 6
FUEL, LUBRICATION GROUP
FIG. 640
EH722
- 20 -
03-10
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SECTION 6
FUEL, LUBRICATION GROUP
Ref. Part Number Description
Qty Remarks
To-From
Fig.
210 20K-62301-10 Carburetor Ay
1
2
6
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
3
1
1
1
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
-1
-2
-3
-8
20K-62536-08 Valve, throttle
258-62555-08 Screw Set, valve
20K-62525-08 Valve, choke
20K-62520-08 Shaft Ay, choke
20K-62530-08 Shaft Cp, throttle
20K-62500-08 Valve, float
-11
-14
-15
-16
-18
-19
-28
-29
-40
-41
-57
-61
-62
20K-62515-08 Pin, float
20K-62556-08 Chamber Ay, float
20K-62540-08 Gasket, float chamber
263-62505-08 Float
215-62353-08 Screw, drain
215-62446-08 Spring, drain
20K-62553-08 Screw, throttle adjust
258-62445-08 Spring, adjust screw
20B-62453-08 Screw
20K-62560-08 Collar, choke
263-62574-08 Seal, throttle shaft
-102 20K-62550-08 Seal, throttle
-103 20K-62551-08 Collar, throttle
-125 20K-62557-08 Valve Cp, solenoid
-126 20B-62556-08 Gasket
-165 20B-62541-08 O ring
-166 20K-62541-08 Gasket, spacer
-167 20K-62554-08 Spacer, carburetor
-168 20K-62542-08 O ring
-176 20K-62559-08 Cover, slow passage
-177 20K-62558-08 Gasket, slow passage
-178 107-62462-08 Screw
-993 20K-62400-08 Main Jet Cp, left
-994 20K-62401-08 Main Jet Cp, right
-996 20K-62555-08 Chamber Cp, float
EH722
- 21 -
03-10
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SECTION 6
FUEL, LUBRICATION GROUP
FIG. 685
EH722
- 22 -
03-10
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SECTION 6
FUEL, LUBRICATION GROUP
Ref. Part Number Description
752 280-65011-A1 Adapter Cp
754 280-65025-A3 Elbow Adapter 1
758 280-65050-A3 O ring
Qty Remarks
To-From
Fig.
1
2
1
3
1
1
1
4
1
685
685
685
685
685
685
685
685
685
765 X11-00601-01
Flange Bolt
810 280-65001-C1 Oil Cooler Cp
822 280-65037-03
824 280-65038-03
Hose 1, oil cooler
Hose 2, oil cooler
826 X56-10900-30 Hose Clamp
840 280-65030-01 Bracket Cp, oil cooler
EH722
- 23 -
03-10
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SECTION 7
ELECTRIC DEVICE GROUP
FIG. 700
EH722
- 24 -
03-10
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SECTION 7
ELECTRIC DEVICE GROUP
Ref. Part Number Description
Qty Remarks
To-From
Fig.
10
11
15
20
30
35
50
95
263-77203-11
263-78203-01
263-79411-A1
263-71002-03
001-14062-50
001-16052-00
Flywheel Cp
1
2
1
1
4
4
1
2
2
2
1
2
1
1
2
1
3
1
1
1
2
1
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
Ignition Coil Cp
Charge Coil Cp
Ring Gear
Bolt and Washer Ay
Bolt and Washer Ay
263-73126-H1 Wire Cp, ignition coil
X65-91000-10 Plug Terminal
100 X65-01407-30 Spark Plug
110
112
130 X11-00801-00
216 002-38080-00
291 263-71903-A1 Regulator Cp
301 X11-00601-40 Flange Bolt
330 280-73101-A1 Wiring Harness
384 X56-30000-80 Wire Band
410 056-60002-50
760 263-73102-11
761 280-73102-01
NGK BPR4EY
X65-51000-10 Spark Plug Cap
279-55201-03
Grommet, plug cap
Flange Bolt
Flange Nut
Clamp
Wire Ay, oil pressure switch
Wire Cp, fuel cut
770 206-75501-A1 Clamp Cp
775 X11-00600-10 Flange Bolt
EH722
- 25 -
03-10
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SECTION 7
ELECTRIC DEVICE GROUP
FIG. 770
EH722
- 26 -
03-10
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SECTION 7
ELECTRIC DEVICE GROUP
Ref. Part Number Description
Qty Remarks
To-From
Fig.
120 263-70503-00 Starting Motor Ay
1
1
1
1
1
1
1
1
1
2
1
1
1
1
3
1
1
1
731
731
731
731
731
731
731
731
731
731
731
731
731
731
731
731
731
731
-1
-4
-6
-7
-9
-11
263-70561-08 Yoke Ay
245-70503-08 Brush Holder Ay
263-70512-08 Armature Ay
263-70522-08 Pinion Ay
263-70503-08 Gear Case Cy
263-70507-08 Rear Cover Ay
-14 245-70518-08 Shift Lever Set
-15 263-70515-08 Magnetic Switch Ay
-17 207-70524-08 Through Bolt
-23 245-70516-08 Washer Stopper Set
-30 245-70520-08 Dust Cover Kit
-77 207-70526-08 Rubber Cap
-80 263-70596-08 Internal Gear
-82 263-70576-08 Planet Gear
-85 245-70509-08 Center Bracket, P
-86 263-70591-08 Center Bracket, A
-95 263-70571-08 Pinion Shaft
EH722
- 27 -
03-10
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PRINTED IN THE USA
Robin America, Inc
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