Yamaha 20d Manual

							20D’03
(6L32)
25MHB
(6L22)
20MHB
(
6L32
)
25N’03
(6L22)
A
1
2B6L2−100E1 
						

							A
2
FOREWORD
This Parts Catalogue is related to the parts for the model(s) in the below frame. When you are ordering replace-
mentparts, please refer to this Parts Catalogue and quote both part numbers and part names correctly.
20MHB(6L32), 25MHB(6L22),
20D’03(6L32), 25N’03(6L22)
1. Modifications or additions which have been madeafter issue of the Parts Catalogue will
be announced in the YamahaParts News.
It is advisable that youmake necessary corrections to theParts Catalogue according to
the YamahaParts News.
2. Abbreviations
The Following abbreviations are used inthis Parts Catalogue.
“UR” Use specified parts number.
“UN” Use asmany as needed.
“AP” Alternate Parts
“LM” Local Made
(Partsneed to be orderedlocally)
“O/S” Over Size
3. Parts, which are to be supplied in an assembly, are listed with a dot(.) in front of the part
name as shown below.
EXAMPLE
CARBURETOR ASSY
.JET, PILOT
.NOZZLE, MAIN
4. Number of component for assembly
The numeral appearing to the right ofeach componentpart indicates the quantity of
parts foreach assemblyunit.
EXAMPLE
PART NO. DESCRIPTION REMARKS
6E0−85500−70 C.D.I. MAGNETO ASSY 1
6E0−85550−70 .ROTOR ASSY 1
6E0−15723−00−94..PULLY, STARTER 15. Quantity Column Information
NAME for Q’TY COLUMN
APPLICABLE MODEL
20MH
20MHB, 20DMH
25MH
25MHB, 25NMH
25WC
25NWC
6. Applicable Starting Serial No. and ColorCode
1) Engine Starting Serial No.
20MSHB 6L3K : 1000001
20MLHB 6L3K : 1000001
25MSHB 6L2K : 1000001
25MLHB 6L2K : 1000001
20DMH S/L 6L3K : 1000001
25NMH S/L 6L2K : 1000001
25NWC L 6L2K : 1000001
2) Color Code
ColorCode
Color Name
Abbreviation
004D
DARK BLUISH GRAY METALLIC 2
DBNM2
7. Note that the illustrations for reference in finding parts numbers, not to beused for as-
sembling. When assembling, please use the applicable service manual.
8. The asterisk (*) before a reference number indicates modification items after the first
edition.
E
EHT EH 
						

							A
3
CONTENTS
SHEET
1/2
TOP COWLING A4.....................................
CYLINDER. CRANKCASE A5............................
CRANKSHAFT. PISTON A7..............................
INTAKE B2............................................
CARBURETOR B4.....................................
FUEL 1 B6............................................
FUEL 2 B7............................................
STARTER C1..........................................
GENERATOR C3.......................................
ELECTRICAL 1 C5.....................................
ELECTRICAL 2 C6.....................................
STARTING MOTOR D1..................................
BOTTOM COWLING D2.................................
STEERING D4.........................................
CONTROL 1 D6........................................
CONTROL 2 E1........................................
BRACKET 1 E2........................................
BRACKET 2 E5........................................
UPPER CASING E7....................................
LOWER CASING. DRIVE 1 F1...........................
LOWER CASING. DRIVE 2 F4...........................
FUEL TANK F6........................................
REMOTE CONTROL BOX F7............................
INDEX
NUMERICAL INDEX G1.................................SHEET
2/2
REMOTE CONTROL ASSY A4*...........................
SWITCH. PANEL A6*....................................
REPAIR KIT 1 A7*.......................................
REPAIR KIT 2 B1*.......................................
INDEX
NUMERICAL INDEX G1*................................. 
						

							A
4
FIG. 1 TOP COWLING1 6L2−42610−50−4D TOP COWLINGASSY 1 1
6L3−42610−50−4D TOP COWLINGASSY 1
2 6L2−42615−00 .SEAL 1 1 1
3 6G1−42651−71 .HOOK 1 1 1
4 6L2−42647−00 .HOLDER, CLAMP BAND 1 1 1
5 90266−04M00 .RIVET 2 2 2
6 6L2−42613−01−4D .MOLDING, AIR DUCT 1 1 1
7 97095−06016 .BOLT 4 4 4
8 92995−06600 .WASHER 4 4 4
9 6L2−W0070−30 .GRAPHIC SET 1 1 1
10 6L2−42677−30 .GRAPHIC, FRONT 1 1
6L3−42677−30 .GRAPHIC, FRONT 1
11 6L2−42678−30 .GRAPHIC, REAR 1 1
6L3−42678−30 .GRAPHIC, REAR 1
12 90266−04M04 .RIVET 2 2 2
13 6L2−13437−00 .MARK, CAUTION 1 1 1
PART NO. DESCRIPTION REMARKS REF.
NO.
20MH
25MH
25WC 
						

							A
5
FIG. 2 CYLINDER. CRANKCASE1 6L2−W0090−04−1S CRANK CYLINDERASSY 1 1 1 FORUSA,
OCEANIA−N.O/I
6L2−W0090−54−1S CRANK CYLINDERASSY 1 1 FORCANADA−N.O/I
2 6L2−15100−00−1S CRANKCASEASSY 1 1 1 FORUSA,
OCEANIA−N.O/I
6L2−15100−50−1S CRANKCASEASSY 1 1 FORCANADA−N.O/I
3 6E5−11372−01 .NIPPLE, HOSE 4 4 4 FOR 6L2−15100−00−1S
4 90445−07M15 HOSE (L40) 2 2 2 FOR 6L2−15100−00−1S
5 90467−06016 CLIP 4 4 4 FOR 6L2−15100−00−1S
6 93604−12M07 PIN, DOWEL 4 4 4
7 95617−08645 BOLT, STUD 2 2 2
8 90201−08086 WASHER, PLATE 2 2 2
9 95333−08600 NUT 2 2 2
10 90119−08M65 BOLT, WITH WASHER 4 4 4
11 90119−06M14 BOLT, WITH WASHER 4 4 4
12 6J8−11325−00 ANODE 1 1 1
13 6H3−11327−00−1S COVER, ANODE 1 1 1
14 6H3−11328−00 GROMMET, ANODE 1 1 1
15 97013−06016 BOLT 1 1 1
16 92903−06600 WASHER, PLATE 1 1 1
17 6L2−11111−01−1S HEAD, CYLINDER 1 1 1 1
18 6L2−11181−A2 GASKET, CYLINDER HEAD 1 1 1 1
19 6L2−11191−00−1S COVER, CYLINDER HEAD 1 1 1 1
20 6L2−11193−A1 GASKET, HEAD COVER 1 1 1 1
21 90119−08M91 BOLT, WITH WASHER 10 10 10
22 90119−06023 BOLT, WITH WASHER 2 2 2
23 6E5−12411−30 THERMOSTAT 1 1 1
24 6H4−12413−00−1S COVER, THERMOSTAT 1 1 1
25 6J8−12414−A0 GASKET, COVER 1 1 1
PART NO. DESCRIPTION REMARKS REF.
NO.
20MH
25MH
25WC 
						

							A
6
FIG. 2 CYLINDER. CRANKCASE26 90119−06MA3 BOLT, WITH WASHER 2 2 2
27 6L2−4 1111−00−1S INNER COVER, EXHAUST 1 1 1
28 6L2−41112−A1 GASKET, EXHAUST INNER COVER 1 1 1
29 6L2−41113−00−1S OUTER COVER, EXHAUST 1 1 1
30 676−11372−00 .NIPPLE, HOSE 1 1 1
31 6L2−41114−A1 GASKET, EXHAUST OUTER COVER 1 1 1
32 90119−06MA4 BOLT, WITH WASHER 10 10 10
33 90445−10M40 HOSE (L330) 1 1 1
34 6L2−45113−A1 GASKET, UPPER CASING 1 1 1
35 94702−00217 PLUG, SPARK (NGK B7HS−10) 2 FOR USA
94702−00271 PLUG, SPARK (NGK BR7HS−10) 2 2 2 FOR CANADA,
OCEANIA
PART NO. DESCRIPTION REMARKS REF.
NO.
20MH
25MH
25WC 
						

							A
7
FIG. 3 CRANKSHAFT. PISTON1 6L2−11400−00 CRANKSHAFTASSY 1 1 1N.O/I
2 6L2−11412−00 .CRANK 1 1 1 1
3 6L2−11422−00 .CRANK 2 1 1 1
4 6L2−11432−00 .CRANK 3 1 1 1
5 6L2−11442−00 .CRANK 4 1 1 1
6 93311−632U7 .BALL BEARING 1 1 1
7 93102−26M27 ..OIL SEAL 1 1 1
8 93210−42159 .O−RING 1 1 1
9 93306−305U3 .BEARING 2 2 2
10 6L2−11651−00 .ROD, CONNECTING 2 2 2
11 6L2−11681−00 .PIN, CRANK 1 2 2 2
12 93310−424W9 .BEARING 2 2 2
13 90209−24M15 .WASHER 4 4 4
14 6L2−11515−00 .SEAL, LABYRINTH 1 1 1 1
15 91690−30010.PIN, SPRING 1 1 1
16 6J8−11445−00 .SPACER 1 1 1 N.O/I
17 90387−28M00 .COLLAR 1 1 1
18 90201−50306 WASHER, PLATE 1 1 1
19 6L2−11631−00−97 PISTON (STD) 2 2 2
6L2−11635−00 PISTON (0.25MM O/S) 2 2 2 AP
6L2−11636−00 PISTON (0.50MM O/S) 2 2 2 AP
20 6L2−11610−00 PISTON RING SET (STD) 2 2 2
6L2−11610−10 PISTON RING SET (0.25MM O/S) 2 2 2 AP
6L2−11610−20 PISTON RING SET (0.50MM O/S) 2 2 2 AP
21 648−11633−00 PIN, PISTON 2 2 2
22 93602−18M12 PIN, DOWEL 62 62 62
23 93450−20026 CIRCLIP 4 4 4
PART NO. DESCRIPTION REMARKS REF.
NO.
20MH
25MH
25WC 
						

							B
1
FIG. 3 CRANKSHAFT. PISTON24 90201−18522 WASHER, PLATE 4 4 4
25 6L2−15396−00−1S HOUSING, OIL SEAL 1 1 1
26 93102−25142 OIL SEAL 1 1 1
27 93101−13M37 OIL SEAL 1 1 1
28 93210−56M80 O−RING 1 1 1
29 97095−06016 BOLT 2 2 2
30 92995−06600 WASHER 2 2 2
PART NO. DESCRIPTION REMARKS REF.
NO.
20MH
25MH
25WC 
						

							B
2
FIG. 4 INTAKE1 6L2−13610−00 REED VALVEASSY 2 2 2
2 6L2−W0004−00 .REED SET 1 1 1
3 97880−05016 SCREW, PAN HEAD 4 4 4
4 92990−05600 WASHER, PLATE 4 4 4
5 6L2−13641−00−94 MANIFOLD 1 1 1 1
6 6L2−13621−00 GASKET, VALVE SEAT 1 1 1
7 97013−06025 BOLT 6 6 6
8 92903−06600 WASHER, PLATE 6 6 6
9 90445−09012 HOSE (L70) 1 1 1
10 90467−08004 CLIP 2 2 2
11 6L2−14198−00 GASKET 2 2 2
12 6L2−14417−00−94 COVER 1 1 1 1
13 6L2−14476−00 SEAL 1 1 1
14 93210−35M86 O−RING 2 2 2
15 97013−05012 BOLT 4 4 4
16 92903−05600 WASHER, PLATE 4 4 4
17 97513−06585 BOLT, WITH WASHER 4 4 4
18 6L2−14476−11 SEAL 1 1 1
19 6L2−14418−00 COVER 2 1 1 1
20 97880−05016 SCREW, PAN HEAD 4 4 4
21 92990−05600 WASHER, PLATE 4 4 4
22 6J8−41259−00 ROD, CHOKE 3 1 1 1
23 661−41262−02 JOINT, CHOKE LEVER 3 3 3
24 6J8−41271−01 KNOB, CHOKE 1 1 1
25 6L2−41257−00 ROD, CHOKE 2 1 1 1
26 6L2−41217−00 ROD, ACCEL. LEVER 1 1 1
27 6A1−83625−41 MARK 5 1 1 1
PART NO. DESCRIPTION REMARKS REF.
NO.
20MH
25MH
25WC 
						

							B
3
FIG. 4 INTAKE28 6A1−83625−51 MARK 5 1 1 FOR CANADA
PART NO. DESCRIPTION REMARKS REF.
NO.
20MH
25MH
25WC