Thank you for purchasing an MTD Snow Thrower. It was carefully
engineered to provide excellent performance when properly
operated and maintained.
All information in this manual is relative to the most recent
product information available at the time of printing. Please be
aware that this Illustrated Part’s Manual may cover a range of
product specifications for various models.
Drive System & Auger Assembly ............................ 6
Record Product Information
To ease in ordering replacement parts, please locate the model
plate on the equipment and record the information in the
provided area to the right. You can locate the model plate by
looking beneath the seat.
Components listed and/or illustrated in this manual may not be
applicable to all models. We reserve the right to change product
specifications, designs and equipment without notice and
without incurring obligation.
Throughout this manual, all references to right (RH) and left (LH)
are observed from the operating position.
Engine Model 161-JWA 123cc ................................. 8
Engine Model 270-SU 208cc ..................................12
Mo d e l nu M b e r
se r I a l nu M b e r
Painted Parts
When ordering painted service parts, a four digit color suffix must be added to the part number (e.g. 783-XXXXX-0637).
Please refer to the table below for current color codes:
0637Black
0709Dark Green (Bolens, Yard-Man)
0662Oyster Gray (MTD Gold)
0638Red (Yard Machines, Huskee, Troy-Bilt, MTD)
0691Black Jack (MTD Gold, MasterCut)
0674Yellow (Yard-Man)
0650Metallic Red (White Outdoor)
0629Silver Flake (MTD Platinum)
04038Day Orange (Daedong)
04033Flint Mica (Troy-Bilt XP)
2
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3
3
Shroud, Chute, & Handle
1
2
13
12
20
14
19
4
27
21
3
13
17
7
6
10
23
26
5
24
24
25
23
22
9
23
26
8
6
16
11
15
18
28
4
4
Ref.
Part NumberDescription
1.731- 06 551Shroud
68 4- 042 36A†Shroud
2.710-04 669Hex Washer Screw, 10-16 x .625
3.71 0-12 05Eye Bolt, ⁄-20
4.720-0279Knob Handle
5.710 -0895Hex Washer Screw, ⁄-15 x .750
6.712 -0 4 06 3Flange Lock Nut, ⁄-18
7.710 -109 0Hex Screw, ⁄-18 x 1.25
8.931- 043 53Lower Chute Ring
9.9 3 2- 04 111Chute Adjustment Spring
10.931-04886Chute Adapter
11.931 -0 4127Lower Chute, 5” Diameter
12 .731-04 426AUpper Chute
13.720-04072AWing Knob
14.731- 04388 AChute Handle
15.710 -0 451Carriage Bolt, ⁄-18 x .750
16.710- 04071Carriage Bolt, ⁄-18 x 1.00
17.72 5- 0157Cable Tie, ⁄ x .05 x 7.4
18.74 9 - 0 4 114 BLower Handle
19.710-04532Carriage Screw, ⁄-18 x 2.00
20.74 9- 0 4106 AGullwing Handle
21.747- 0 4159AGullwing Control Bail
22.7 31-1033Shave Plate, 21”
23.7 12- 04 06 4Flange Lock Nut, ⁄-20
24.710 -0 134Carriage Screw, ⁄-20 x .62
25.710- 3008Hex Screw, ⁄-18 x .75
26.93 6 -0 176Flat Washer, .265 x .938 x .120
27.746-04237Clutch Cable
28.7 10-18 82†Hex Screw, ⁄-18 x 1.50
Shroud, Chute, & Handle
† Model 2M5
5
5
Drive System & Auger Assembly
43
34
35
16
13
11
12
23
14
10
3
27
28
24
25
32
31
26
4
5
21
20
6
7
6
8
9
15
30
33
37
40
38
39
41
36
37
29
42
18
19
17
1
22
2
2
47
50
51
48
49
46
46
52
45
44
6
6
Drive System & Auger Assembly
Ref.
Part NumberDescription
1.734-04033Wheel, 8 x 2 (Gray)
73 4- 040 63A†Wheel, 7 x 1.5 (Gray)
2.936-0326Flat Washer, .510 x 1.000 x .125
3.710 -0599Hex Screw, ⁄-14 x .500
4.710 -10 44Hex Screw, ⁄-24 x 1.50
710-0627†Hex Bolt, ⁄-24 x .75
5.736- 0247Flat Washer, .406 x 1.25 x .157
73 6 -0 371†Bell Washer, .343 x .880 x .062
6.756-0 4353Pulley Half, 4L-V x 2.30 OD
95 6- 0416B †Pulley Half, .625 ID x .225 OD
7.954- 04204V-Belt
954 -0101A†V-Belt
8.
750-0 4303††
9.
750-05084††
10.756-0 4232V-Type Pulley, ⁄ x 35.7
11.710-04 09Hex Screw, ⁄-24 x 1.75
12 .9 36 - 0119Lock Washer, ⁄
13.9 26 -015 4Cable Tie, 7.5
14.790-00334Engine Support Bracket
790-0 0216†Engine Bracket
15.710 -0 623Hex Washer Screw, ⁄-16 x .50
16.750-04297BSpacer, .875 x .320 x 1.027
17.710-0896Hex Washer Screw, ⁄-14 x .625
18.710 -0653Hex Washer Screw, ⁄-20 x .375
19.790-00045CBelt Cover
684-04357†Belt Cover
20.710- 0106Hex Screw, ⁄-20 x 1.25
21.750-0 4571Shoulder Spacer, .260 x .785 x .538
22.684-04168Pulley Assembly, 1.917 OD
23.7 12- 04 06 3Flange Lock Nut, ⁄-18
24.74 8- 02 34Shoulder Spacer
Spacer, .875 ID x 1.185 OD
Spacer, .88 ID x 1.18 OD x .74 Lg.
Ref.
Part NumberDescription
25.790-00238AIdler Bracket w/ Brake
26.712 -0 4 06 4Flange Lock Nut, ⁄-2 0
27.790-00249Bearing Cup
28.741 -0 4188 ABall Bearing, 1.25 x 37 x 12.6301
29.710 -0642Hex Screw, ⁄-20 x .750
30.936-0329Lock Washer, ⁄
31.738 -0924AShoulder Screw, .340 x .335 x ⁄-28
32.756 -0625Cable Roller
33.9 36 - 0176Flat Washer, .265 x .938 x .120
34.712-0896Hex Lock Nut, ⁄-28
35.93 2- 035 7AExtension Spring, .33 OD x 1.12
36.684 -04252Auger Assembly, 21”
684- 04227†Auger Assembly, 21”
37.710-05058Hex Screw, ⁄-14 x .75
38.735-04033Rubber Pad
39.735-04032Spiral Crescent
40.750 -04758RH Spacer
41.750 -04757LH Spacer
42.726 -0299Push Cap, ⁄
43.684 -04 314Auger Housing
44.7 10- 07 51†Hex Bolt, ⁄-20 x .620
45.712 -0 4 06 4†Flange Lock Nut, ⁄-20
46.726-0205†Hose Clamp, .490
47.726-0233†Push Nut, .25 ID x .50 OD
48.747-0 4236†Fuel Tank Support Wire
49.951-10 023 †Fuel Tank, 2 Qt.
50.7 51-104 87†Fuel Cap
51.79 0 -0 0134 †Fuel Tank Bracket
52.751 -1034 9†Fuel Line Hose
NS
92 9- 00 71A^††
Extension Cord
† Model 2M5
†† Model 2P5
^ Not Shown
7
7
123cc 161-JWA Engine
97
1
5
31
34
4
9
80
8
6
10
92
38
36
89
41
37
20
29
30
32
33
96
39
87
90
94
69
68
56
58
59
57
52
53
70
72
82
48
73
77
71
50
51
71
12
75
108
11
55
54
76
79
62
40
78
93
7
14
13
60
17
16
61
74
81
47
45
15
64
63
84
79
95
40
22
46
44
43
85
110
23
24
83
67
65
64
66
18
20
21
88
19
25
91
28
26
106
103
109
105
102
98
100
99
104
101
107
42
41
8
123cc 161-JWA Engine
Ref.
No.
1710-04920Flange Bolt
8715 -0 40 92Dowel Pin, 7 x 14
12714 - 04 074Governor Arm Clip
16710-04906Drain Plug Bolt
17736-04440Drain Plug Washer
18951-10958Ignition Coil
1995 1- 1110 2Flywheel Bae
20710 -04 919Flange Bolt
219 51-1090 8Flywheel
22951-10910Cooling Fan
2395 1- 10 9 11Starter Cup
247 12- 042 09Nut
2595 1- 1110 7Blower Housing
26710 -04 914Flange Bolt
28731-05696Recoil Starter Handle
2971 2- 04 211Nut
309 51 -1110 6Governor Arm Bracket
31710- 049 08Bolt
32951-10954Throttle Return Spring
339 51 -1115 2Governor Rod
34951-10953Governor Return Spring
369 51 -1110 3Cover Shield
379 51 -111 0 4Governor Spring Bracket
38710-04921Flange Bolt
3995 1-109 01Muer Assembly
41712 -0 4212Nut
429 51-109 62Intake Heater Box Base
4395 1-109 61Intake Heater Box
4471 0- 0 4913Bolt
469 51-106 39Primer
47951-10956Carburetor Assembly
50710-049 02Pivot Bolt
527 51 -1112 3Valve Adjusting Nut
537 51 -1112 4Pivot Locking Nut
61951 -10913Push Rod Kit
68710- 04916Bolt
699 51 -110 5 4 AValve Cover
71710 -0 4922Bolt
72731- 07059Breather Hose
73951-10292Spark Plug
Part No.Description
Ref.
No.
759 51-106 57Muer Stud Assembly
77715 -0 40 90Dowel Pin, 10 x 16
78710 -0490 9Carburetor Studs
807 15- 04 08 9Dowel Pin, 9 x 14
8272 6- 041 01Hose Clamp
83710 -04916Bolt
859 51 -1110 5Cylinder Bae
87712 - 042 10Nut
88710-0 4918Flange Bolt
90951-10959Muer Gasket
91951-10955Recoil Starter Assembly
92951-10307Flywheel Key
96951-10957Dipstick Assembly
1089 51-10 912Valve Kit
110710 -04928Bolt
NS731- 0563 2Ignition Key
—951-11095Crankcase Cover Kit
4—Crankcase Cover
9—Case Cover Gasket
96951-10957Dipstick Assembly
—951-10951AGasket Kit - Complete
5—Oil Seal
9—Crankcase Cover Gasket
11—O-ring, 5.2 x 1.9
45—Carburetor Gasket
70—Head Cover Gasket
76—Cylinder Head Gasket
79—Carburetor Insulator Gasket
81—Packing
84—Oil Seal, 22 x 35 x 7
90951-10959Muer Gasket
95951 -10370Oil Drain Plug and Washer Assembly
96951-10957Dipstick Assembly
—951-10952AGasket Kit - External
70—Head Cover Gasket
79—Carburetor Insulator Gasket
81—Packing
90951-10959Muer Gasket
95951 -10370Oil Drain Plug and Washer Assembly
96951-10957Dipstick Assembly
Part No.Description
9
123cc 161-JWA Engine
Ref.
No.
—9 51 -11 09 7Crankcase Kit
14—Bearing
15—Crankcase Complete
84—Oil Seal
—9 51 -11 09 6Crankshaft Kit
6—Bearing
7—Crankshaft Assembly
14—Bearing
92951-10307Flywheel Key
9395 1-109 48Carburetor Kit - Major
98—Float Pin
99—Needle Valve Spring
100—Needle Valve
101—Bowl Gasket
102—Main Jet
103—Fuel Drain Plug Gasket
104—Float
105—Main Nozzle
106—Idle Speed Adjusting Screw
107—O-Ring- Main Cup Bolt
109—Throttle Shaft Dust Seal
949 51-109 49ACylinder Head Assembly
40—Carburetor Insulator Plate
50710-049 02Pivot Bolt
51—Rocker Arm
527 51 -1112 3Valve Adjusting Nut
537 51 -1112 4Pivot Locking Nut
56—Valve Spring
57—Intake Valve Spring Seat
58—Exhaust Valve Spring Seat
59—Exhaust Valve Adjuster
62—Push Rod Guide Plate
70—Head Cover Gasket
74—Cylinder Head - Complete
76—Cylinder Head Gasket
77715 -0 40 90Dowel Pin, 10 x 16
79—Carburetor Insulator Gasket
90951-10959Muer Gasket
1089 51-10 912Valve Kit
Part No.Description
Ref.
No.
—9 51 -11 06 3 AValve Cover Kit
699 51 -110 5 4 AValve Cover
70—Valve Cover Gasket
95951 -10370Oil Drain Plug and Washer Assembly
16710-04906Oil Drain Plug
17736-04440Oil Drain Plug Washer
97951-10950AShort Block Assembly
1710-04920Flange Bolt
4—Crankcase Cover
5—Oil Seal
6—Bearing
7—Crankshaft Assembly
8715 -0 40 92Dowel Pin, 7 x 14
9—Case Cover Gasket
10—Governor Assembly
11—O-ring Gov. Shaft
12714 - 04 074Pin Lock
13—Governor Arm Shaft
14—Bearing
15—Crankcase Complete
16710-04906Oil Drain Plug
17736-04440Oil Drain Plug Washer
40—Carburetor Insulator Plate
45—Heat Pipe Intake Gasket
48—Camshaft Assembly
60—Valve Lifter
61951 -10913Push Rod Kit
63—Piston Ring Set - Oil
64—Piston Pin Clip
65—Piston
66—Piston Pin
67—Connecting Rod Complete
70—Head Cover Gasket
76—Cylinder Head Gasket
79—Carburetor Insulator Plate Gasket
807 15- 04 08 9Dowel Pin
84—Oil Seal
90951-10959Muer Gasket
92951-10307Flywheel Key
96951-10957Dipstick Assembly
Part No.Description
10
This page left intentionally blank.
11
208 cc 270-SU Engine
115
122
68
55
87
34
127
43
66
88
62
60
25
25
58
89
25
65
36
53
45
64
26
92
129
45
124
126
126
67
26
44
128
123
125
125
37
57
37
26
77
38
80
26
39
76
78
85
79
95
40
93
26
26
93
94
81
45
45
143
94
96
113
49
47
130
110
109
72
90
47
32
33
156
26
110
98
99
98
101
97
83
26
26
23
26
23
26
24
22
22
15
13
12
11
150
141
132
5
149
133
158
135
137
140
6
13
7
3
148
1
1
1
1
2
33
151
152
153
159
130
100
14
8
7
146
147
138
131
105
84
10
134
136
139
154
142
8
4
27
19
21
145
104
20
9
10
102
26
15
28
56
16
155
26
15
30
18
29
26
84
74
15
73
75
72
72
72
46
17
31
63
71
69
53
34
121
117
64
48
118
119
86
157
52
35
104
70
61
59
54
82
12
208 cc 270-SU Engine
Ref.
No.
1710-0 4968Bolt
29 5 1- 110 5 4Valve Cover
37 31-0 7059Breather Hose
47 26 -0 4101Hose Clamp
77 5 1-111 24Pivot Locking Nut
87 5 1-111 23Valve Adjusting Nut
10710- 049 02Pivot Bolt
15710 -04933Bolt
18951-10292Spark Plug
199 51 -112 8 2Muer Assembly
20710-05001Stud
219 5 1- 112 89Muer Gasket
22712 -0 4214Nut
23710 -0 4914Bolt
249 51 -11111Exhaust Pipe Shield
25710-0 4940Bolt
26710 - 04 915Bolt
27951-10 642 AMuer Shroud
28710-049 39Stud, M6 x117
29710 -04 910Stud, M6 x 105
33951-10 638 ACarburetor Assembly
359 51 -11112Choke Control Bracket
36951-106 34Engine Shroud
377 12- 04 213Nut
389 51 -112 8 4Choke Knob
3995 1-10757Throttle Control Knob
40951-10 637Ignition Switch
4395 1-106 40Choke Push Rod
449 51-10635Heater Box
45710 - 04919Bolt
479 51-106 48Push Rod Kit (incl. intk and exhst rod)
49715 - 04 09 0Dowel Pin
579 51 -11113Air Shield
599 51 -11 35 6Governor Arm Shaft
60736-04461Washer
62714 - 04 074Cotter Pin
649 5 1- 113 69Radial Ball Bearing
65951 -1030 7Flywheel Key
68715- 04 092Dowel Pin, 7 x 14
69715 -0 40 96Dowel Pin, 9 x 14
Part No.Description
Ref.
No.
709 51 -113 7 1Crankcase Cover Gasket
72710-04932Bolt
759 51 -11 36 8Oil Seal
78736-04440Washer
8095 1- 1137 0Oil Seal
819 51-1064 6Ignition Coil
829 51 -11110Air Flow Shield
83951 -1065 0Fuel Line Kit (incl. clmps and fuel line)
8495 1-11 73 1Hose Clamp
85951 -106 41Oil Drain Ass’y, includes 77, 78, 79
86951-10805Flywheel
87951-10909Cooling Fan
8895 1- 10 911Starter Cup
89712 -0 42 09Nut
90951-10 647Valve Kit (incl. intk and exhst valve)
92951-10 663 ABlower Housing
93736 -04 455Washer
94710 -0 49 74Bolt
95951 -1065 8Recoil Starter Assembly
96731- 05632Key
9795 1-1075 8Throttle Control Assembly
98710- 05103Bolt
9995 1- 1110 8Governor Shield
100751-1193 5Governor Spring
101951-1 066 4Throttle Return Spring
102951-1 066 5Governor Rod
104712 -0 4212Nut
105710-0 4908Bolt
109951-1 066 2Engine/Dipstick Cover
110710 -0 4905Bolt
11375 1-11913Dipstick Tube
11575 1-11912Dipstick
1179 51-106 49Fuel Cap Assembly
1189 51-11933Fuel Level Indicator
1199 51-106 53BFuel Tank
1219 5 1-1111 4Switch Housing Mounting Bracket
1227 51-11934O-Ring
123710 -0 4965Bolt, M4 x 55
124710 -0 4935Bolt, M4 x 60
125710-0 5182Bolt
Part No.Description
13
208 cc 270-SU Engine
Ref.
No.
126715-04088Dowel Pin
1279 51-1064 5AElectric Starter
128710 -0 4979Bolt
1299 5 1-111 0 9Blower Housing Shield
1309 51-106 39APrimer
131710 -0 4945Bolt
132710 -0 4938Drain Bolt
143731-05696Starter Handle
1559 51 -111 0 6Governor Arm Bracket
1569 51-11903O-Ring
1579 51 -11 6 8 0Wire Clip
—951-10 651Fuel Tank Nipple (Not Shown)
—952Z270-SUEngine, Complete
33951-10 63 8ACarburetor Assembly
130951 -1063 9APrimer
131710-04945Bolt
132710-04938Drain Bolt
133—Gasket, Throttle Plate
134—Float Pin
135—Emulsion Tube
136—Needle Valve
137—Main Jet
138—Needle Valve Spring
139—Float
140951-11589Fuel Bowl Gasket
14195 1- 113 4 9Fuel Drain Plug Gasket
1429 5 1- 113 4 8Fuel Bowl Gasket
146—Choke Shaft
147—Choke Plate
148—Throttle Shaft
149—Throttle Plate
150—Screw, M3×5
151—Lock Washer
152—Idle Jet Assembly
153—Idle Speed Adjusting Screw
154—Fuel Bowl
158751-119 06Hose Clamp
159751 -120 06Primer Hose
Part No.Description
Ref.
No.
—9 5 1- 110 6 0AShort Block Assembly (Not Shown)
59 51 -11 56 5Head Cover Gasket
219 51 -11 28 9Muer Gasket
309 51 -11 56 7Carburetor Insulator Gasket
317 51 -11 89 6Carburetor Insulator Plate
469 51 -115 7 2Cylinder Head Gasket
4875 1- 118 9 9Ta pp et
497 15- 04 09 0Dowel Pin
529 51 -112 5 3Piston Ring Set
539 51 -116 3 2Piston Pin Snap Ring
5475 1-120 07Piston
559 51 -116 3 3Piston Pin
589 51 -11 57 3Connecting Rod Assembly
599 51 -113 5 6Governor Arm Shaft
60736-04461Washer
617 51-11902Governor Seal
627 14- 0 4074Cotter Pin
639 5 1-11 57 5Camshaft Assembly
649 51 -113 6 9Radial Ball Bearing
659 51-103 07Flywheel Key
66—Crankshaft Assembly
679 51 -115 7 6Governor Gear/Shaft Assembly
68715 - 04 092Dowel Pin, 7 x 14
697 15- 04 09 6Dowel Pin, 9 x 14
709 51 -113 71Crankcase Cover Gasket
71—Case Cover
72710 -0 4932Bolt
739 5 1-11 57 7O-Ring
74—Oil Fill Plug
759 51 -113 6 8Oil Seal
76—Crankcase
779 51 -11 35 0Oil Drain Pipe
78736-04440Washer
79710-04906Oil Drain Plug
809 51 -113 7 0Oil Seal
14595 1-106 57Muer Stud Assembly
20710-05001Stud
Part No.Description
14
208 cc 270-SU Engine
Ref.
No.
—9 5 1- 110 21Carburetor Kit, Major (Not Shown)
133—Gasket, Throttle Plate
134—Float Pin
135—Emulsion Tube
136—Needle Valve
137—Main Jet
138—Needle Valve Spring
139—Float
140—Fuel Bowl Gasket
141—Fuel Drain Plug Gasket
142—Fuel Bowl Gasket
—9 51-10 661BGasket Kit, External (Not Shown)
59 51 -11 56 5Head Cover Gasket
219 51 -11 28 9Muer Gasket
309 51 -11 56 7Carburetor Insulator Gasket
317 51 -11 89 6Carburetor Insulator Plate
3275 1 -115 6 9ACarburetor Gasket
347 51 -118 9 7Carburetor Gasket Plate
78736-04440Washer
—9 5 1- 1124 6Crankcase Cover Kit (Not Shown)
649 51 -113 6 9Radial Ball Bearing
709 51 -113 71Crankcase Cover Gasket
71—Case Cover
72—Cover Bolts
73—O-Ring
74—Oil Fill Plug
759 51 -113 6 8Oil Seal
—9 5 1- 1124 7Crankshaft Kit (Not Shown)
649 51 -113 6 9Radial Ball Bearing
659 51-103 07Flywheel Key
66—Crankshaft Assembly
759 51 -113 6 8Oil Seal
809 51 -113 7 0Oil Seal
—9 5 1- 1124 9Crankcase Kit (Not Shown)
617 51-11902Governor Seal
649 51 -113 6 9Radial Ball Bearing
709 51 -113 71Crankcase Gasket
76—Crankcase
809 51 -113 7 0Oil Seal
Part No.Description
Ref.
No.
—9 51-10 668 ACylinder Head Assembly (Not Shown)
59 51 -11 56 5Head Cover Gasket
6751-12000Intake Valve Spring Seat
77 51 -1112 4Pivot Locking Nut
87 51 -1112 3Valve Adjusting Nut
97 51 -11 89 3Rocker Arm
10710 -0 4902Pivot Bolt
117 51-12 00 2Exhaust Valve Adjuster
12751 -120 03Exhaust Valve Spring Seat
13751 -120 04Valve Spring
147 51 -11 8 94Intake Valve Seal
167 51 -11 89 5Push Rod Guide Plate
17—Cylinder Head - Complete
219 51 -11 28 9Muer Gasket
309 51 -11 56 7Carburetor Insulator Gasket
317 51 -11 89 6Carburetor Insulator Plate
469 51 -115 7 2Cylinder Head Gasket
90951 -106 47Valve Kit
—9 5 1- 110 59 AGasket Kit, Complete (Not Shown)
59 51 -11 56 5Head Cover Gasket
219 51 -11 28 9Muer Gasket
309 51 -11 56 7Carburetor Insulator Gasket
317 51 -11 89 6Carburetor Insulator Plate
3275 1 -115 6 9ACarburetor Gasket
347 51 -118 9 7Carburetor Gasket Plate
469 51 -115 7 2Cylinder Head Gasket
60736-04461Washer
617 51-11902Governor Seal
627 14- 0 4074Cotter Pin
709 51 -113 71Crankcase Cover Gasket
759 51 -113 6 8Oil Seal
78736-04440Washer
809 51 -113 7 0Oil Seal
—9 5 1- 110 6 3Valve Cover Kit (Not Shown)
29 51 -11 0 54Valve Cover
59 51 -11 56 5Head Cover Gasket
569 51 -11 28 3Oil FIll Plug Assembly
739 5 1-11 57 7O-Ring
74—Oil FIll Plug
Part No.Description
15
To order replacement parts or locate your nearest service dealer call Customer Support at (800) 828-5500.
or visit www.troybilt.com to find the nearest authorized dealer in your area.