Subaru Robin Power Products PKX401 User Manual

PARTS
MANUAL

Model

PKX401
PUMP

PUB-PP
Rev. 06/02

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

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

© Copyright 2002 Robin America, Inc.

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:

PKX 401

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

PRODUCT NO. (15 digits)

PKX401 - 3 - 06-02

X X X X

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.

PKX401 - 4 - 06-02

GROUP INDEX

Group Name Page

PUMP FROUP ............................................................................................6

CRANKCASE GROUP ...............................................................................8

CRANKSHAFT GROUP ...........................................................................10

INTAKE and EXHAUST GROUP ..............................................................12

GOVERNOR GROUP ..............................................................................16

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

FUEL, LUBRICANT GROUP .................................................................... 20

CARBURETOR GROUP .......................................................................... 22

ELECTRIC DEVICE GROUP .................................................................. 24

ACCESSORY GROUP ............................................................................. 26

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

PKX401 - 5 - 06-02

SECTION 1 PUMP GROUP

FIG. 100

PKX401 - 6 - 06-02

SECTION 1 PUMP GROUP

REF PART NO DESCRIPTION QTY REMARKS FROM - TO FIG
110 470-01165-53 PUMP CASING 1 100
115 471-00000-41 O RING 1 100
120 470-01107-17 VOLUTE CASING 1 100
130 470-01156-64 IMPELLER 1 100
140 470-01157-64 MECHANICAL SEAL 1 100
145 470-01100-81 ADJUSTING WASHER 3 100
150 471-00000-40 O RING 1 100
170 470-01180-79 PLUG AY 2 100
180 471-00000-42 BOLT AND WASHER 12 100
210 470-01157-63 FLANGE BRACKET 1 100
280 471-00000-43 SOCKET BOLT 4 100
285 471-00000-02 SEAL WASHER 4 100
310 470-01113-65 SUCTION OR DELIVERY 1 100
320 470-01173-63 CHECK VALVE 1 100
410 471-01161-51 DELIVERY FLANGE 1 100
420 470-01107-50 DELIVERY FLANGE PACK 1 100
510 470-01112-17 STRAINER 1 100
520 471-00000-46 HOSE BAND 3 100
610 470-01177-47 FRAME AY 1 100
670 470-01105-15 CUSHION RUBBER 4 100
675 470-01159-23 CUSHION RUBBER 1 100
680 471-00000-61 BOLT AND WASHER 1 100
681 471-00000-71 BOLT AND WASHER 4 100
684 471-00000-68 SPRING WASHER 4 100
686 471-00000-66 WASHER 4 100
690 471-00000-38 NUT 4 100
691 471-00000-57 NUT 4 100
695 471-00000-36 BOLT AND WASHER 4 100
910 470-01165-69 LABEL 1 100

PKX401 - 7 - 06-02

SECTION 2 CRANKCASE GROUP

FIG. 200

PKX401 - 8 - 06-02

SECTION 2 CRANKCASE GROUP

REF. PART NO. DESCRIPTION QTY . REMARKS FROM-TO FIG.
10 279-10102-21 CRANKCASE CP 1 w/ Oil Sensor 200
20 237-14202-03 VALVE GUIDE 2 200
26 277-16010-01 STEM SEAL 1 200
30 044-03001-60 OIL SEAL 1 200
40 060-03003-40 BALL BEARING 1 200
50 277-15011-03 PIPE KNOCK 2 200
60 010-50802-50 STUD 2 200
70 010-50604-10 STUD 2 200
75 044-00600-20 OIL SEAL 1 200
80 040-11400-30 PLUG 2 200
90 021-11400-20 GASKET 2 200
210 279-11001-11 MAIN BEARING COVER CP 1 200
220 044-03001-60 OIL SEAL 1 200
230 060-03000-20 BALL BEARING 1 200
250 277-45004-11 GOVERNOR GEAR CP 1 200
260 263-41901-03 GOVERNOR SLEEVE 1 200
270 279-63601-03 OIL GAUGE 1 200
275 279-65001-03 FILLER PLUG 1 200
280 021-32000-50 GASKET 1 200
281 021-32000-50 GASKET 1 200
300 001-04083-50 FLANGE BOLT 7 200
610 279-13001-01 CYLINDER HEAD CP 1 200
620 279-15001-13 GASKET, head 1 200
630 011-00802-40 FLANGE BOLT 4 200
631 001-04083-50 FLANGE BOLT 1 200
680 277-15501-01 ROCKER COVER CP 1 200
690 277-16001-03 GASKET, rocker cover 1 200
700 277-15011-03 PIPE KNOCK 2 200
710 011-00600-20 FLANGE BOLT 4 200
850 085-10800-00 RUBBER PIPE 1 200
960 279-99001-07 GASKET SET 1 200
EX0-20000-01 GASKET IN A TUBE

Gasket Sets include the following:
Fig. 200 items 90, 280, 620 and 690
Fig. 400 items 340 and 550

PKX401 - 9 - 06-02

SECTION 3 CRANKSHAFT GROUP

FIG. 300

PKX401 - 10 - 06-02

SECTION 3 CRANKSHAFT GROUP

REF. PART NO. DESCRIPTION QTY. REMARKS FROM-TO FIG.
10 279-20301-11 CRANKSHAFT 1 300

50 018-01800-10 FLANGE NUT 1 300
70 032-30300-10 WOODRUFF KEY 1 300
310 279-22501-20 CONNECTING ROD AY 1 300
320 279-23001-03 CONNECTING ROD BOLT 2 300
350 279-23301-03 PISTON PIN 1 300
360 279-23401-03 PISTON 1 300
370 279-23511-07 PISTON RING SET 1 300
380 056-51800-10 CLIP 2 300

PKX401 - 11 - 06-02

SECTION 4 INTAKE and EXHAUST GROUP

FIG. 400

PKX401 - 12 - 06-02

SECTION 4 INTAKE and EXHAUST GROUP

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

10 279-31601-01 CAMSHAFT CP 1 400
25 277-35101-03 PIN, camshaft 1 400
27 024-00600-10 O RING 1 400
34 277-38601-03 PIN, spring 1 400
35 279-36401-03 RELEASE LEVER 1 400
37 277-36501-03 CLIP 1 400
38 277-38701-03 RETURN SPRING 1 400
60 279-33601-03 VALVE SPRING 2 400
70 132-09KA0-40 RETAINER VALVE SPRING 2 400
80 279-33401-13 INTAKE VALVE 1 400
90 279-33501-13 EXHAUST VALVE 1 400
95 132-10KA0-31 COLLET VALVE 4 400
150 279-35601-01 TIMING CHAIN CP 1 400
160 277-36911-03 TENTIONER 1 400
163 277-37101-03 SPRING, tentioner 1 400
166 277-36902-03 PIN, tentioner 1 400
170 277-36913-13 CHAIN GUIDE 1 400
200 277-35001-03 PIN, rocker 1 400
220 277-36101-00 ROCKER ARM AY, intake 1 400
225 277-36102-00 ROCKER ARM AY, exhaust 1 400
230 014-90500-10 ADJUST SCREW 1 400
231 014-90500-10 ADJUST SCREW 1 400
240 017-00500-20 NUT 1 400
241 017-00500-20 NUT 1 400
290 011-00600-20 FLANGE BOLT 1 400
310 279-30101-11 MUFFLER CP 1 400
320 279-34201-11 MUFFLER COVER CP 1 400
340 277-35201-03 GASKET, muffl er 1 400
350 980-20082-80 FLANGE NUT 2 400
360 015-20600-90 TAPPING BOLT 2 400
361 011-00600-10 FLANGE BOLT 1 400
365 011-00801-50 FLANGE BOLT 1 400
440 277-37001-03 DEFLECTOR 1 400
445 015-00400-60 TAPPING SCREW 2 400
510 279-32612-00 AIR CLEANER AY 1 400
540 279-32901-11 INSULATOR CP 1 400
550 279-35901-13 GASKET, insulator 1 400
570 002-38060-00 FLANGE NUT 2 400
580 011-00600-50 FLANGE BOLT 1 400

PKX401 - 13 - 06-02

SECTION 4 INTAKE and EXHAUST GROUP

FIG. 410

PKX401 - 14 - 06-02

SECTION 4 INTAKE and EXHAUST GROUP

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

510 279-32611-00 AIR CLEANER AY 1 410

-200 279-32630-08 CASE 1 410

-220 279-32650-08 GASKET 1 410

-250 279-32640-08 COVER 1 410

-260 279-32730-08 LABEL 1 410
520 279-32603-08 ELEMENT 1 410
570 002-38060-00 FLANGE NUT 1 410
580 011-00600-50 FLANGE BOLT 1 410

PKX401 - 15 - 06-02

SECTION 5 GOVERNOR GROUP

FIG. 500

PKX401 - 16 - 06-02

SECTION 5 GOVERNOR GROUP

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

10 279-42301-13 GOVERNOR LEVER 1 500
20 277-42201-13 GOVERNOR SHAFT 1 500
30 279-42701-01 GOVERNOR ROD CP 1 500
40 277-42801-13 ROD SPRING 1 500
50 003-13050-00 CLIP 1 500
60 001-14062-50 BOLT and WASHER AY 1 500
70 018-60600-20 NUT 1 500
80 279-42502-03 GOVERNOR SPRING 1 500
310 279-43302-01 SPEED CONTROL LEVER 1 500
340 277-43501-03 STOP PLATE 1 500
350 020-00601-70 WASHER 1 500
355 021-70600-70 FRICTION WASHER 1 500
360 004-31064-00 SCREW 1 500
365 237-45004-23 SPRING, adjust 1 500
370 002-17060-00 NUT 1 500
395 277-43901-03 CLAMP 1 500
396 004-36051-60 SCREW and WASHER AY 1 500
435 277-46001-01 SPEED CONTROL BRKT CP 1 500
440 004-31040-80 SCREW 1 500
450 002-35060-00 SELF LOCK NUT 1 500
480 267-45101-03 RETURN SPRING 1 500
485 011-00600-20 FLANGE BOLT 2 500

PKX401 - 17 - 06-02

SECTION 6 COOLING and STARTING GROUP

FIG. 600

PKX401 - 18 - 06-02

SECTION 6 COOLING and STARTING GROUP

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

10 279-51201-01 BLOWER HOUSING 1 Yellow 600
20 073-20051-40 LABEL, trademark 1 600
40 011-00600-20 FLANGE BOLT 4 600
60 279-52711-11 BAFFLE 1 CP, case 1 600
61 279-52702-03 BAFFLE 2, head 1 600
80 001-65081-20 BOLT 1 600
81 011-00600-20 FLANGE BOLT 1 600
210 279-50202-00 RECOIL STARTER AY 1 600

-1 226-50716-08 SPIRAL SPRING 1 600

-2 279-50120-08 REEL 1 600

-3 279-5010-08 STARTER ROPE 1 600

-4 226-50701-08 STARTER KNOB 1 600

-5 279-50125-08 RATCHET 2 600

-6 226-50731-08 FRICTION SPRING 1 600

-7 226-50752-08 RATCHET SPRING 2 600

-11 279-50145-08 STARTER PULLEY 1 600

-35 226-50741-08 FRICTION PLATE 1 600

-49 226-50753-08 CENTER SCREW 1 600
220 011-00600-10 FLANGE BOLT 4 600

PKX401 - 19 - 06-02

SECTION 7 FUEL, LUBRICATION GROUP

FIG. 700

50

PKX401 - 20 - 06-02

SECTION 7 FUEL, LUBRICATION GROUP

REF. PART NO. DESCRIPTION QTY. REMARKS FROM-TO FIG.
10 279-60101-11 FUEL TANK CP 1 Yellow 700

20 073-20051-80 LABEL, warning 1 700
23 279-95101-03 LABEL, model 1 700
30 043-04300-60 FUEL TANK CAP CP 1 leakproof 700
40 064-13600-10 FUEL FILTER 1 700
45 064-80007-00 FUEL GAUGE CP 1 700
46 014-50500-40 SCREW, countersink 2 700
48 050-51200-20 UNION 1 700
50 279-62102-00 FUEL STRAINER AY 1 700
60 002-38080-00 FLANGE NUT 2 700
63 011-00802-50 FLANGE BOLT 2 700
80 085-10600-00 RUBBER PIPE 1 700
90 056-11100-20 HOSE CLAMP 2 700
224 277-43801-01 CHOKE LEVER CP 1 700

PKX401 - 21 - 06-02

SECTION 7 FUEL, LUBRICATION GROUP

FIG. 710

PKX401 - 22 - 06-02

SECTION 7 FUEL, LUBRICATION GROUP

REF. PART NO. DESCRIPTION QTY. REMARKS FROM-TO FIG.
210 279-62301-00 CARBURETOR AY 1 710

-1 279-62535-08 THROTTLE VALVE 1 710

-2 251-62450-08 SCREW 2 710

-3 279-62525-08 CHOKE VALVE 1 710

-5 279-62420-08 SLOW JET 1 710

-6 279-62354-08 SCREW, idle adjusting 1 710

-7 251-62449-08 SPRING 1 710

-8 279-62520-08 CHOKE SHAFT 1 710

-11 279-62530-08 SHAFT AY 1 710

-12 251-62453-08 SCREW 1 710

-15 279-62515-08 PIN FLOAT LEVER 1 710

-16 279-62550-08 CHAMBER FLOAT 1 710

-17 251-62350-08 GASKET 1 710

-18 279-62540-08 GASKET CHAMBER 1 710

-19 279-62505-08 FLOAT AY 1 710

-22 279-62400-08 MAIN JET 1 710

-28 279-62355-08 DRAIN SCREW 1 710

-32 279-62561-08 BUSH 1 710

-40 279-62353-08 ADJUSTING SCREW 1 710

-41 279-62445-08 SPRING 1 710

-60 279-62562-08 COLLAR 1 710

-104 279-62552-08 GASKET 1 710

-121 251-62480-08 CAP 1 710

-151 279-62452-08 O-RING 1 710

-152 279-62451-08 O-RING 1 710

PKX401 - 23 - 06-02

SECTION 8 ELECTRIC DEVICE GROUP

FIG. 800

PKX401 - 24 - 06-02

SECTION 8 ELECTRIC DEVICE GROUP

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

10 279-79230-01 FLYWHEEL CP 1 800
11 279-79430-01 IGNITION COIL CP 1 800
12 279-79301-01 LAMP COIL CP 1 800
30 001-14062-50 BOLT and WASHER AY 2 800
35 004-35062-00 SCREW and WASHER AY 2 800
50 277-73102-01 WIRE 2 CP 1 800
60 066-00003-71 SWITCH AY 1 800
70 015-00400-90 TAPPING SCREW 2 800
100 065-01401-50 SPARK PLUG 1 800
110 065-50002-70 SPARK PLUG CAP 1 800

PKX401 - 25 - 06-02

SECTION 8 ELECTRIC DEVICE GROUP

FIG. 810

PKX401 - 26 - 06-02

SECTION 8 ELECTRIC DEVICE GROUP

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

700 279-76301-21 OIL SENSOR CP 1 810
705 KU3-11043-01 FLOAT 1 810
740 001-14061-60 BOLT and WASHER AY 2 810
741 011-00600-20 FLANGE BOLT 1 810
770 214-79006-01 CLAMP CP 1 810
775 011-00600-10 FLANGE BOLT 1 810

PKX401 - 27 - 06-02

SECTION 9 ACCESSORY GROUP

FIG. 900

PKX401 - 28 - 06-02

SECTION 9 ACCESSORY GROUP

REF. PART NO. DESCRIPTION QTY. REMARKS FROM-TO FIG.
10 227-90301-H0 ACCESSORY TOOL KIT 1 900

PKX401 - 29 - 06-02

PRINTED IN THE USA