Page 1
PARTS
MANUAL
Model
EX170D50042
ENGINE
PUB-EPMK
Rev. 11/06
Page 2
940 Lively Blvd. • Wood Dale, IL 60191 • Phone: 630-350-8200 • Fax: 630-350-8212
e-mail: sales@robinamerica.com • www.robinamerica.com
© Copyright 2006 Robin America, Inc.
EX170D50042 - 2 - 11-06
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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 dif ference 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:
E X 1 7 0
SPEC NO. (11 digits) CODE NO. (4 digits)
PRODUCT NO. (15 digits)
EX170D50042 - 3 - 11-06
X X X X
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MANUAL LAYOUT
1
2
1
6
4
3
7
9
2
3
5
4
8
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.
EX170D50042 - 4 - 11-06
Page 5
GROUP INDEX
Group Name Page
CRANKCASE GROUP ...............................................................................6
CRANKSHAFT GROUP .............................................................................8
INTAKE and EXHAUST GROUP ..............................................................10
GOVERNOR GROUP ..............................................................................18
COOLING and STARTING GROUP ......................................................... 22
FUEL, LUBRICANT GROUP .................................................................... 26
CARBURETOR GROUP .......................................................................... 28
ELECTRIC DEVICE GROUP .................................................................. 32
ACCESSORY GROUP ............................................................................. 38
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 ...........................VOLT AGE
~W ..........................WA TT
W/ ...........................WITH
W/O ........................WITHOUT
EX170D50042 - 5 - 11-06
Page 6
SECTION 1 CRANKCASE GROUP
FIG. 100
EX170D50042 - 6 - 11-06
Page 7
SECTION 1 CRANKCASE GROUP
REF. PART NO. DESCRIPTION QTY. REMARKS FROM-TO FIG.
10 277-10102-41 CRANKCASE CP 1 100
20 237-14202-03 VALVE GUIDE 2 100
26 277-16010-01 STEM SEAL 1 100
30 044-02502-00 OIL SEAL 1 100
40 060-02800-21 BALL BEARING 1 100
50 277-15011-03 PIPE KNOCK 1 100
60 010-50802-50 STUD 2 100
70 010-50603-51 STUD 2 100
75 044-00600-20 OIL SEAL 1 100
80 040-11400-30 PLUG 1 100
90 021-11400-20 GASKET 1 100
210 277-11002-21 MAIN BEARING COVER 1 100
220 044-02502-10 OIL SEAL 1 100
230 060-02501-40 BALL BEARING 1 100
250 277-45004-J1 GOVERNOR GEAR 1 100
260 277-41901-03 GOVERNOR SLEEVE 1 100
270 277-63601-13 OIL GAUGE 2 100
280 021-31600-20 GASKET 1 100
300 001-04083-50 FLANGE BOLT 6 100
610 277-13001-11 CYLINDER HEAD CP 1 100
620 277-15001-23 GASKET, head 1 100
630 011-00802-40 FLANGE BOLT 4 100
631 011-00803-10 FLANGE BOLT 1 100
380 277-15503-01 ROCKER COVER 1 100
390 277-16001-13 GASKET, rocker cover 1 100
700 277-15011-03 PIPE KNOCK 2 100
710 011-00600-20 FLANGE BOLT 4 100
960 277-99001-27 GASKET SET 1 100
EX170D50042 - 7 - 11-06
Page 8
SECTION 2 CRANKSHAFT GROUP
FIG. 200
EX170D50042 - 8 - 11-06
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SECTION 2 CRANKSHAFT GROUP
REF. PART NO. DESCRIPTION QTY. REMARKS FROM-TO FIG.
10 277-20901-51 CRANKSHAFT CP 1 200
50 018-01400-20 FLANGE NUT 1 200
70 032-30300-10 WOODRUFF KEY 1 200
80 206-26001-13 KEY 1 200
310 277-22501-10 CONNECTNG ROD AY 1 STD 200
311 277-22502-10 CONNECTNG ROD AY 1 Undersize 0.25 200
320 277-23001-03 CONNECTING ROD BOLT 1 200
350 277-23301-13 PISTON PIN 1 200
360 277-23401-J3 PISTON 1 STD 200
361 277-23403-J3 PISTON 1 Oversize 0.25mm 200
362 277-23404-J3 PISTON 1 Oversize 0.50mm 200
370 277-23511-37 PISTON RING SET 1 STD 200
371 277-23512-17 PISTON RING SET 1 Oversize 0.25mm 200
372 277-23513-17 PISTON RING SET 1 Oversize 0.50mm 200
380 056-51600-10 CLIP 2 200
EX170D50042 - 9 - 11-06
Page 10
SECTION 3 INTAKE and EXHAUST GROUP - New Style
FIG. 300
240
230
EX170D50042 - 10 - 11-06
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SECTION 3 INTAKE and EXHAUST GROUP - New Style
REF. PART NO. DESCRIPTION QTY. REMARKS FROM-TO FIG.
10 277-31601-31 CAMSHAFT 1 300
25 277-35101-03 PIN, camshaft 1 300
27 024-00600-10 O RING 1 300
34 277-38601-03 PIN, spring 1 300
35 277-36401-03 RELEASE LEVER 1 300
37 277-36501-03 CLIP 1 300
38 277-38702-03 RETURN SPRING 1 300
60 279-33601-03 VALVE SPRING 2 300
70 269-33701-03 SPRING RETAINER 2 300
80 277-33401-H3 INTAKE VALVE 1 300
90 277-33501-H3 EXHAUST VALVE 1 300
95 132-10KA0-31 COLLET VALVE 4 300
150 277-35601-11 TIMING CHAIN 1 300
160 277-36911-03 TENTIONER 1 300
163 277-37101-03 SPRING, tentioner 1 300
166 277-36902-03 PIN, tentioner 1 300
170 277-36913-13 CHAIN GUIDE 1 300
200 277-35002-01 PIN, rocker 1 300
202 003-13050-00 CLIP 1 300
220 277-36201-00 ROCKER ARM, intake 1 300
225 277-36202-00 ROCKER ARM, exhaust 1 300
230 014-90500-20 ADJUST SCREW 1 300
231 014-90500-20 ADJUST SCREW 1 300
240 017-00500-30 NUT 1 300
241 017-00500-30 NUT 1 300
290 011-00600-20 FLANGE BOLT 1 300
310 277-30111-J1 MUFFLER CP 1 7000~ 300
277-30111-H1 MUFFLER CP 1 ~6999 300
315 277-37601-01 SPARK ARRESTER 1 300
317 015-00400-60 TAPPING SCREW 1 300
320 277-34201-21 MUFFLER COVER 1 7031~ 300
277-34201-11 MUFFLER COVER 1 ~7030 300
340 277-35201-13 GASKET, muffl er 1 300
350 980-20082-80 FLANGE NUT 2 300
360 015-20600-90 TAPPING BOLT 2 300
361 011-00600-10 FLANGE BOLT 1 300
365 011-00803-20 FLANGE BOLT 1 300
387 015-00400-60 TAPPING SCREW 2 300
440 277-37001-H1 DEFLECTOR 1 300
540 277-32902-J1 INSULATOR 1 300
550 277-32903-J3 GASKET 2, insulator 1 300
560 277-35902-J3 GASKET 1, insulator 1 300
570 002-38060-00 FLANGE NUT 2 300
580 011-00600-50 FLANGE BOLT 1 300
EX170D50042 - 11 - 11-06
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SECTION 3 INTAKE and EXHAUST GROUP
FIG. 320
-272
-315
-250
-210
-260
-220
-310
-270
520
-200
510
EX170D50042 - 12 - 11-06
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SECTION 3 INTAKE and EXHAUST GROUP
REF. PART NO. DESCRIPTION QTY. REMARKS FROM-TO FIG.
510 277-32613-20 AIR CLEANER AY 1 7092~ 315
277-32613-10 AIR CLEANER AY 1 ~7091 315
-200 277-32630-18 BASE CP 1 315
-210 277-32610-08 PACKING 1 315
-220 277-32604-08 PACKING 1 315
-250 277-32641-08 COVER CP 1 315
-260 277-32609-08 LABEL 1 315
-270 277-32741-08 WING NUT 1 7092~ 315
277-32741-18 WING NUT 1 ~7091 315
-272 277-32607-08 WING NUT 1 315
-310 77-32770-08 ROTARY BLADE 1 315
-315 277-32705-08 CROSS RECESSED SCREW 2 315
-520 277-32611-07 ELEMENT SET 1 315
EX170D50042 - 13 - 11-06
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SECTION 4 GOVERNOR GROUP - New Style
FIG. 400
486
EX170D50042 - 14 - 11-06
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SECTION 4 GOVERNOR GROUP - New Style
REF. PART NO. DESCRIPTION QTY. REMARKS FROM-TO FIG.
10 277-42301-23 GOVERNOR LEVER 1 400
20 277-42201-33 GOVERNOR SHAFT 1 400
30 277-42701-11 GOVERNOR ROD CP 1 400
40 277-42801-23 ROD SPRING 1 400
50 003-13050-00 CLIP 1 400
60 013-00602-40 BOLT and WASHER 1 400
70 018-60600-20 NUT 1 400
80 277-42510-13 GOVERNOR SPRING 1 400
310 277-43303-01 SPEED CONTROL LEVER 1 400
322 277-43701-01 LINK ROD 1 400
340 277-43502-03 STOP PLATE 1 400
350 277-44501-03 WASHER 1 400
355 021-70600-70 FRICTION WASHER 1 400
360 004-31062-50 SCREW 1 400
365 237-45004-23 SPRING, adjust 1 400
395 277-43902-03 CLAMP 1 400
396 013-10500-30 SCREW and WASHER 1 400
435 277-46002-01 SPEED CONTROL BRACKET 1 400
440 004-31040-80 SCREW 1 400
450 002-35060-00 SELF LOCK NUT 1 400
480 277-45103-03 RETURN SPRING 1 7031~ 400
267-45101-03 RETURN SPRING 1 ~7030 400
485 011-00600-20 FLANGE BOLT 2 400
EX170D50042 - 15 - 11-06
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SECTION 5 COOLING and STARTING GROUP
FIG. 500
EX170D50042 - 16 - 11-06
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SECTION 5 COOLING and STARTING GROUP
REF. PART NO. DESCRIPTION QTY. REMARKS FROM-TO FIG.
10 277-51202-01 BOWER HOUSING 1 500
20 073-20054-70 LABEL, trademark 1 500
40 011-00600-30 FLANGE BOLT 4 500
60 277-52711-21 BAFFLE 1, case 1 500
61 277-52702-03 BAFFLE 2, head 1 500
80 001-04061-60 FLANGE BOLT 1 500
81 011-00600-20 FLANGE BOLT 1 500
210 269-50201-30 RECOIL STARTER AY 1 500
-1 270-50115-08 SPIRAL SPRING 1 500
-2 269-50120-08 REEL 1 500
-3 282-50111-18 STARTER ROPE 1 500
-4 261-50100-08 STARTER KNOB 1 500
-5 270-50125-08 RATCHET 2 500
-6 227-50131-08 FRICTION SPRING 1 500
-7 227-50135-08 RETURN SPRING 2 500
-8 270-50261-08 RATCHET GUIDE 1 500
-11 269-50145-18 STARTER PULLEY 1 500
-49 227-50152-08 SET SCREW 1 500
220 011-00600-10 FLANGE BOLT 1 500
EX170D50042 - 17 - 11-06
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SECTION 5 COOLING and STARTING GROUP
FIG. 510
EX170D50042 - 18 - 11-06
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SECTION 5 COOLING and STARTING GROUP
REF. PART NO. DESCRIPTION QTY. REMARKS FROM-TO FIG.
EX170D50042 - 19 - 11-06
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SECTION 6 FUEL, LUBRICATION GROUP
FIG. 600
70
EX170D50042 - 20 - 11-06
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SECTION 6 FUEL, LUBRICATION GROUP
REF. PART NO. DESCRIPTION QTY. REMARKS FROM-TO FIG.
10 277-60102-01 FUEL TANK 1 600
20 073-20051-81 LABEL, warning 1 600
23 277-95111-03 LABEL, model 1 600
30 043-04400-50 FUEL TANK CAP 1 600
40 X64-13600-10 FULE FILTER 1 600
48 X50-51200-20 UNION 1 600
60 002-38060-00 FLANGE NUT 2 600
63 011-00601-30 FLANGE BOLT 1 600
70 277-62601-01 FUEL PIPE 1 600
80 X85-10613-50 RUBBER PIPE 1 600
90 056-11100-50 HOSE CLAMP 2 6972~ 600
X56-11100-20 HOSE CLAMP 2 ~6971 600
224 277-43801-01 CHOKE LEVER CP 1 600
EX170D50042 - 21 - 11-06
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SECTION 6 FUEL, LUBRICATION GROUP
FIG. 610
-304
EX170D50042 - 22 - 11-06
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SECTION 6 FUEL, LUBRICATION GROUP
REF. PART NO. DESCRIPTION QTY. REMARKS FROM-TO FIG.
210 277-62303-20 CARBURETOR 1 640
- 1 277-62535-08 THROTTLE VALVE 1 #160 640
- 2 209-62351-08 SCREW 1 640
- 3 277-62525-08 CHOKE VALVE 1 640
- 5 246-62420-08 PILOT JET 1 #40 640
- 8 277-62520-08 CHOKE LEVER 1 640
- 11 277-62531-18 THROTTLE SHAFT-A 1 640
- 12 227-62451-08 BOLT 1 640
- 14 277-62500-08 NEEDLE 1 640
- 15 277-62515-08 PIN 1 640
- 16 277-62506-08 FLOAT BODY AY 1 640
- 17 214-62450-08 PACKING 1 640
- 18 214-62540-08 CHAMBER PACKING 1 640
- 19 226-62506-08 FLOAT 1 640
- 20 277-62440-08 MAIN NOZZLE 1 640
- 22 227-62412-08 JET 1 #78.8 640
- 24 226-62701-18 CLIP 1 640
- 28 277-62360-08 BOLT 1 640
- 40 106-62556-08 SCREW 1 640
- 41 283-62357-08 SPRING 1 640
- 44 248-62410-08 AIR JET 1 640
- 45 106-62410-08 AIR JET(PILOT) 1 640
- 62 236-62680-08 SEAL 1 640
- 79 236-62541-08 PACKING 1 640
-102 246-62390-08 SEAL 1 640
-144 277-62553-08 NUT 1 640
-300 279-62103-10 COCK BODY-A 1 640
-302 277-62110-18 PACKING 1 640
-303 277-62100-18 CUP 1 640
-325 277-62552-08 O-RING 1 640
-327 165-62377-08 SCREW 2 640
EX170D50042 - 23 - 11-06
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SECTION 7 ELECTRIC DEVICE GROUP
FIG. 700
23
EX170D50042 - 24 - 11-06
Page 25
SECTION 7 ELECTRIC DEVICE GROUP
REF. PART NO. DESCRIPTION QTY. REMARKS FROM-TO FIG.
10 277-79230-11 FLYWHEEL 1 700
11 277-79431-01 IGNITION COIL 1 700
30 001-14062-50 BOLT and WASHER 2 700
50 277-73102-H1 WIRE 2 CP 1 700
60 X66-00003-61 SWITCH AY 1 700
70 015-00400-90 TAPPING SCREW 2 700
100 065-01401-50 SPARK PLUG 1 700
110 065-50002-70 SPARK PLUG CAP 1 700
700 277-76301-211 OIL SENSOR 1 700
705 KU3-11043-11 FLOAT C/U CP3 1 700
740 001-14061-60 BOLT and WASHER 2 700
741 015-20500-10 TAPPING SCREW 1 700
EX170D50042 - 25 - 11-06
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SECTION 9 ACCESSORY GROUP
FIG. 900
EX170D50042 - 26 - 11-06
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SECTION 9 ACCESSORY GROUP
REF. PART NO. DESCRIPTION QTY. REMARKS FROM-TO FIG.
10 277-90301-H0 ACCESSORY KIT 1 900
EX170D50042 - 27 - 11-06
Page 28
PRINTED IN THE USA
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