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MTD Lawn Mower Parts 1991
  MTD 121-838E000 (1991) Lawn Mower Parts
MTD Lawn Mower Replacement For Model 121-838E000 (1991)

MTD Lawn Mower Replacement Parts For Model 121-838E000 (1991)

We Sell Only Genuine MTD Parts

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Questions & Answers for MTD 121-838E000 (1991)

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MTD 121-838E000 (1991) Lawn Mower Page A Diagram
 Fig #
A1
Foam Grip - 9
 $9.14

Part Number:720-0294A

In Stock

In Stock

Note: (2 Required)
 $9.14
In Stock
 $9.14
A2
Control Handle Ass'y. L.H. Obsolete - Not Available
 $20.05

Part Number:731-0609

Discontinued

Discontinued
 $20.05
Discontinued
A2A
Control Handle Ass'y. L.H. Obsolete - Not Available
 $20.05

Part Number:731-0609

Discontinued

Discontinued
 $20.05
Discontinued
A3
Chute Assy Black Obsolete - Not Available
 $60.41

Part Number:731-1023

Discontinued

Discontinued

Note: (Rear Discharge Models 836r, 836r 837r & 838r Only)
 $60.41
Discontinued
A4
Screw-truss Mach
 $6.78

Part Number:710-0796

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: (Optional Parts)
 $6.78
Usually ships in 7 - 12 business days
 $6.78
A7
Control Panel Half Obsolete - Not Available
 $11.83

Part Number:731-0817A

Discontinued

Discontinued
 $11.83
Discontinued
A8
Control Disc Pin Obsolete - Not Available
 $4.99

Part Number:931-0524

Discontinued

Discontinued
 $4.99
Discontinued
A9
Clutch Panel Half Obsolete - Not Available
 $2.99

Part Number:731-0818

Discontinued

Discontinued
 $2.99
Discontinued
A10
Lever-throttle Con
 $10.18

Part Number:931-0972

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: (Attaching Throttle Wire to Lever Modles 466r, 469r, 476r and 479r: Use Upper Hole in Lever as Shown. All Other Models: Use Lowe
 $10.18
Usually ships in 7 - 12 business days
 $10.18
A11
Hub Cap Black (4-1/4-inch Dia.
 $3.99

Part Number:731-0354

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: (Optional)
 $3.99
Usually ships in 7 - 12 business days
 $3.99
A11A
Hub Cap Gray (4-1/4-inch Dia.)
 $4.99

Part Number:731-0355A

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: (Optional)
 $4.99
Usually ships in 7 - 12 business days
 $4.99
A12
Truss Screw 1/4-20 X .65
 $3.99

Part Number:710-0946

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: (Rear Discharge Models 836r, 836r 837r & 838r Only)
 $3.99
Usually ships in 7 - 12 business days
 $3.99
A14
Handle-upper Short
 $58.98

Part Number:749-0439E-0637

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: (Incl. Ref. No. 9)
 $58.98
Usually ships in 7 - 12 business days
 $58.98
A15
Bracket-panel Sup
 $11.19

Part Number:16129A-0637

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: (Optional Parts)
 $11.19
Usually ships in 7 - 12 business days
 $11.19
A16
Panel Assy-catcher Obsolete - Not Available
 $46.24

Part Number:16862

Discontinued

Discontinued
 $46.24
Discontinued
A17
Door-top Discharge Obsolete - Not Available
 $14.65

Part Number:17095A-0637

Discontinued

Discontinued
 $14.65
Discontinued
A18
Washer-fl Obsolete - Not Available
 $6.90

Part Number:936-0211

Discontinued

Discontinued

Note: (Not Shown)(46" Deck Models Only)
 $6.90
Discontinued
A19
Spring-torsion
 $10.48

Part Number:732-0483A

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: (Optional Parts)
 $10.48
Usually ships in 7 - 12 business days
 $10.48
A20
Pivot Pin .187" Dia. x 7.25" Lg. Obsolete - Not Available
 $2.99

Part Number:747-0514

Discontinued

Discontinued
 $2.99
Discontinued
A21
Bolt-carriage 1/4-
Minimum Quantity of 2 Required
 $5.28

Part Number:710-0134

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: If Equipped
 $5.28
Usually ships in 7 - 12 business days
 $5.28
A23
Screw-hex 1/4-20 X
 $3.99

Part Number:910-0289

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: for Faster Service Obtain Standard Nuts Locally. if These Items Cannot Be Obtained Locally, Order by Part Number and Size as Sho
 $3.99
Usually ships in 7 - 12 business days
 $3.99
A25
Screw-1/4-20 X .62
Minimum Quantity of 2 Required
 $4.18

Part Number:710-0751

In Stock

In Stock

Note: for Faster Service Obtain Standard Nuts, Bolts and Washers Locally. if These Items Cannot Be Obtained Locally, Order by Part Num
 $4.18
In Stock
 $4.18
A26
Nut-hex 1/4-20 Obsolete - Not Available
 $5.62

Part Number:912-0287

Discontinued

Discontinued

Note: for Faster Service Obtain Standard Nuts, Bolts and Washers Locally. if Items Cannot Be Obtained Locally, Order by Part Number an
 $5.62
Discontinued
A27
Washer-spring Bell
Minimum Quantity of 2 Required
 $4.18

Part Number:736-0270

In Stock

In Stock

Note: If Equipped
 $4.18
In Stock
 $4.18
A28
Washer-lock
Minimum Quantity of 2 Required
 $5.57

Part Number:936-0329

In Stock

In Stock

Note: (for Model E633e)
 $5.57
In Stock
 $5.57
A29
Frame-catcher-fr
 $53.74

Part Number:747-0705-0637

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: (Rear Discharge Models 836r, 836r 837r & 838r Only)
 $53.74
Usually ships in 7 - 12 business days
 $53.74
A30
Washer-fl-.385 X 1
Minimum Quantity of 2 Required
 $5.60

Part Number:736-0258

Backorder: No ETA

Backorder: No ETA

Note: (Once This Piece Is Put on Tractor, It Doesn’t Need to Be Removed When Snow Thrower Is Removed From Tractor)
 $5.60
Backorder: No ETA
 $5.60
A31
Kit-control Hsg.
 $54.53

Part Number:753-0833

In Stock

In Stock

Note: (Not Shown)
 $54.53
In Stock
 $54.53
A32
Spark Plug Boot Obsolete - Not Available
 $2.99

Part Number:735-0639

Discontinued

Discontinued

Note: (Optional)
 $2.99
Discontinued
A33
Key, 3/16" x 1" Obsolete - Not Available
 $2.99

Part Number:712-0109

Discontinued

Discontinued
 $2.99
Discontinued
A34
Cable-throttle
 $19.72

Part Number:946-0674A

In Stock

In Stock

Note: for Model 848c Only.
 $19.72
In Stock
 $19.72
A35
Use 749-0907b
 $54.42

Part Number:749-0907B-0637

In Stock

In Stock

Note: (Code: N)
 $54.42
In Stock
 $54.42
A38
Bag Grass Obsolete - Not Available
 $173.26

Part Number:964-0082

Discontinued

Discontinued

Note: For Model 808
 $173.26
Discontinued
A38A
21" Top Discharge Grass Bag- Gray Obsolete - Not Available
 $66.84

Part Number:764-0256

Discontinued

Discontinued
 $66.84
Discontinued
A39
Retaining Strip Obsolete - Not Available
 $4.99

Part Number:14835

Discontinued

Discontinued
 $4.99
Discontinued
A40
Truss Mach. Scr. 5/16-18 X .75
 $5.71

Part Number:710-0323

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: for Faster Service Obtain Standard Nuts, Bolts and Washers Locally. if Items Cannot Be Obtained Locally, Order by Part Number an
 $5.71
Usually ships in 7 - 12 business days
 $5.71
A41
Fl-wash. .344 I.d. X .62 O.d.
Minimum Quantity of 2 Required
 $4.48

Part Number:736-0204

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: (Optional)
 $4.48
Usually ships in 7 - 12 business days
 $4.48
A42
Chain- Axle Ass'y. Obsolete - Not Available
 $2.99

Part Number:17055B

Discontinued

Discontinued
 $2.99
Discontinued
A43
Screw-hex B-tap 1
 $5.76

Part Number:710-0352

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: Not Part of Transmission Complete
 $5.76
Usually ships in 7 - 12 business days
 $5.76
A44
Bearing-ball Obsolete - Not Available
 $19.26

Part Number:941-0180

Discontinued

Discontinued

Note: (106f)
 $19.26
Discontinued
A45
Hex Wash. Scr. 1/4-14 X .625
Minimum Quantity of 2 Required
 $4.44

Part Number:710-0896

In Stock

In Stock
 $4.44
In Stock
 $4.44
A46
Arm-catcher Suppor Obsolete - Not Available
 $11.34

Part Number:749-0778

Discontinued

Discontinued

Note: (Rear Discharge Models 836r, 836r 837r & 838r Only)
 $11.34
Discontinued
A47
Nut Hex Lock 3/8-2 Obsolete - Not Available
 $3.99

Part Number:912-0296

Discontinued

Discontinued

Note: Models 820 Thru 829
 $3.99
Discontinued
A48
#48 Chain .50" Pitch X 30 Links Obsolete - Not Available
 $8.01

Part Number:913-0353

Discontinued

Discontinued
 $8.01
Discontinued
A49
Nut- Hex Ins
Minimum Quantity of 2 Required
 $4.55

Part Number:712-0346

In Stock

In Stock
 $4.55
In Stock
 $4.55
A50
Plug Obsolete - Not Available
 $3.99

Part Number:731-0564

Discontinued

Discontinued

Note: (Models 420r Thru 429r Only)
 $3.99
Discontinued
A51
Flap-rr Obsolete - Not Available
 $33.04

Part Number:731-0672A

Discontinued

Discontinued
 $33.04
Discontinued
A52
Tie-cable 7
Minimum Quantity of 2 Required
 $3.99

Part Number:725-0157

In Stock

In Stock

Note: (W/ Heated Grips)
 $3.99
In Stock
 $3.99
A54
Screw-hex Ab-tap
 $7.95

Part Number:710-1025

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: for Models 460r Thru 468r Only.
 $7.95
Usually ships in 7 - 12 business days
 $7.95
A55
Kit-blade Adapter- Obsolete - Not Available
 $47.20

Part Number:753-0485

Discontinued

Discontinued

Note: Used With Splined Crankshaft
 $47.20
Discontinued
A56
Blade-21in
 $31.71

Part Number:942-0621

In Stock

In Stock

Note: (Optional)
 $31.71
In Stock
 $31.71
A58
Washer-bell Obsolete - Not Available
 $3.99

Part Number:936-0453

Discontinued

Discontinued

Note: Used With Splined Crankshaft
 $3.99
Discontinued
A59
Arm Connect-hgt-ad Obsolete - Not Available
 $17.55

Part Number:782-0521

Discontinued

Discontinued

Note: New Part
 $17.55
Discontinued
A60
Screw-hex 7/16-20
 $10.17

Part Number:710-0757

In Stock

In Stock

Note: (Units With Manual Pto.)
 $10.17
In Stock
 $10.17
A61
Spacer .513 I.d. X .703
 $6.05

Part Number:748-0190

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $6.05
Usually ships in 7 - 12 business days
 $6.05
A62
Pulley Half - 2 Reqd. Obsolete - Not Available
 $124.55

Part Number:956-0502

Discontinued

Discontinued

Note: (Used W/Splined Adapter)
 $124.55
Discontinued
A63
Washer-lock 5/16
Minimum Quantity of 2 Required
 $4.95

Part Number:936-0119

In Stock

In Stock

Note: for Faster Service Obtain Standard Nuts, Bolts and Washers Locally. if Items Cannot Be Obtained Locally, Order by Part Number an
 $4.95
In Stock
 $4.95
A64
Bracket Assy-rh Hn Obsolete - Not Available
 $26.37

Part Number:16136C-0637

Discontinued

Discontinued

Note: New Part
 $26.37
Discontinued
A65
Bracket Assy-hndl-lh Obsolete - Not Available
 $24.39

Part Number:16137C-0637

Discontinued

Discontinued

Note: New Part
 $24.39
Discontinued
A66
Bolt-carriage 5/16
Minimum Quantity of 2 Required
 $4.27

Part Number:710-0260A

In Stock

In Stock

Note: for Faster Service Obtain Standard Nuts, Bolts and Washers Locally. if Items Cannot Be Obtained Locally, Order by Part Number an
 $4.27
In Stock
 $4.27
A67
Hex Wash. Hd. B-tap Scr.5/16-1
 $5.97

Part Number:710-0603

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: For Models 147h and 149c Only.
 $5.97
Usually ships in 7 - 12 business days
 $5.97
A68
Screw-hex
Minimum Quantity of 2 Required
 $4.32

Part Number:710-0654A

In Stock

In Stock

Note: Code 665
 $4.32
In Stock
 $4.32
A69
Use 912-3010
Minimum Quantity of 2 Required
 $4.48

Part Number:712-3010

In Stock

In Stock
 $4.48
In Stock
 $4.48
A70
Grip
 $14.85

Part Number:720-0223

In Stock

In Stock
 $14.85
In Stock
 $14.85
A71
Lever-hgt Adj Obsolete - Not Available
 $7.56

Part Number:732-0606

Discontinued

Discontinued
 $7.56
Discontinued
A72
Spring-extension Obsolete - Not Available
 $8.17

Part Number:932-0362

Discontinued

Discontinued
 $8.17
Discontinued
A73
Washer-bell .337 X
Minimum Quantity of 2 Required
 $4.32

Part Number:736-0242

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: Not Used in This Application
 $4.32
Usually ships in 7 - 12 business days
 $4.32
A75
Spacer-shld .500 X Obsolete - Not Available
 $4.99

Part Number:750-0624

Discontinued

Discontinued
 $4.99
Discontinued
A77
Retainer-bolt 1/4x
Minimum Quantity of 2 Required
 $4.53

Part Number:726-0233

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $4.53
Usually ships in 7 - 12 business days
 $4.53
A78
Instruction Label Obsolete - Not Available
 $2.99

Part Number:777-5902

Discontinued

Discontinued
 $2.99
Discontinued
A79
Control Label-throttle
 $3.99

Part Number:777-5812

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $3.99
Usually ships in 7 - 12 business days
 $3.99
A80
Shld. Scr. .342" Dia. X .268 Obsolete - Not Available
 $4.99

Part Number:738-0137

Discontinued

Discontinued
 $4.99
Discontinued
A81
Pawl - Lh
 $11.83

Part Number:948-0188B

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $11.83
Usually ships in 7 - 12 business days
 $11.83
A82
8 X 1.75 T Tread
 $36.36

Part Number:734-1412

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: No Longer Available
 $36.36
Usually ships in 7 - 12 business days
 $36.36
A83
Clamp Obsolete - Not Available
 $3.99

Part Number:726-0175

Discontinued

Discontinued
 $3.99
Discontinued
A84
Hub Cap Obsolete - Not Available
 $7.06

Part Number:10647

Discontinued

Discontinued

Note: (Rear)
 $7.06
Discontinued
A85
Washer-bell 1.008x Obsolete - Not Available
 $3.99

Part Number:936-0450

Discontinued

Discontinued

Note: Used W/Splined Adapter
 $3.99
Discontinued
A86
Crankshaft Spacer
 $4.99

Part Number:748-0332

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: (Models 234r, 236r & 238r Only)
 $4.99
Usually ships in 7 - 12 business days
 $4.99
A87
Clip-panel Bag
 $3.99

Part Number:731-0880

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: (Top Discharge Models 175r, 176r & 177r Only)
 $3.99
Usually ships in 7 - 12 business days
 $3.99
A89
Screw-pan Hd Tapp Obsolete - Not Available
 $3.99

Part Number:710-0748

Discontinued

Discontinued

Note: (Used W/Ref. #22)
 $3.99
Discontinued
A90
Lower Battery Tray
 $10.36

Part Number:16542B

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $10.36
Usually ships in 7 - 12 business days
 $10.36
A91
Upper Battery Tray
 $22.01

Part Number:731-0891A

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $22.01
Usually ships in 7 - 12 business days
 $22.01
A92
Battery Pack
 $231.71

Part Number:925-1276

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: If Equipped
 $231.71
Usually ships in 7 - 12 business days
 $231.71
A93
Key-ign (set Of Tw
 $10.03

Part Number:925-0201

In Stock

In Stock

Note: Electric Start Models Only
 $10.03
In Stock
 $10.03
A94
Switch-key Obsolete - Not Available
 $17.73

Part Number:925-0873

Discontinued

Discontinued

Note: If Equipped
 $17.73
Discontinued
A95
Cable-clutch
 $41.00

Part Number:946-0710A

In Stock

In Stock

Note: Not Part of Transmission Complete
 $41.00
In Stock
 $41.00
A96
Belt-v 3/8 X 31.0
 $31.64

Part Number:954-0343

In Stock

In Stock

Note: 616e
 $31.64
In Stock
 $31.64
A96A
Screw-tap .215 X 1
Minimum Quantity of 2 Required
 $5.57

Part Number:710-0969

In Stock

In Stock

Note: If Equipped
 $5.57
In Stock
 $5.57
A98
Bag Handle Obsolete - Not Available
 $16.84

Part Number:731-0801

Discontinued

Discontinued

Note: (Models 460r Thru 469r Only)
 $16.84
Discontinued
A99
Charger-battery
 $83.16

Part Number:925-0727

In Stock

In Stock

Note: If Equipped
 $83.16
In Stock
 $83.16
A100
Wire Harness Obsolete - Not Available
 $58.35

Part Number:925-1442

Discontinued

Discontinued

Note: If Equipped
 $58.35
Discontinued
A101
Plug Obsolete - Not Available
 $9.95

Part Number:925-1206

Discontinued

Discontinued

Note: If Equipped
 $9.95
Discontinued
A102
Replaced And Merged With: Mtd9
 $51.66

Part Number:96859

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $51.66
Usually ships in 7 - 12 business days
 $51.66
A103
Screw-shld .500 Di
 $10.84

Part Number:738-0234

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: Special
 $10.84
Usually ships in 7 - 12 business days
 $10.84
A104
Bell Washer
 $4.13

Part Number:736-0253

In Stock

In Stock
 $4.13
In Stock
 $4.13
A105
Front Axle Ass'y Obsolete - Not Available
 $54.97

Part Number:982-7509-0637

Discontinued

Discontinued

Note: New Part
 $54.97
Discontinued
A106
Sleeve Obsolete - Not Available
 $3.99

Part Number:911-0313

Discontinued

Discontinued

Note: (Used on Tractors W/Serial No. 192,001 & Above)
 $3.99
Discontinued
A111
Washer-intern L 3/ Obsolete - Not Available
 $3.99

Part Number:736-0221

Discontinued

Discontinued

Note: for Faster Service Obtain Standard Nuts, Bolts and Washers Locally. if Items Cannot Be Obtained Locally, Order by Part Number an
 $3.99
Discontinued
A112
Screw-shld Obsolete - Not Available
 $8.92

Part Number:938-0705

Discontinued

Discontinued
 $8.92
Discontinued
A113
Wheel Assy W/tire
 $76.55

Part Number:734-1268

In Stock

In Stock

Note: (Shown)
 $76.55
In Stock
 $76.55
A114
Kit-control Hsg.
 $54.53

Part Number:753-0833

In Stock

In Stock

Note: (Not Shown)
 $54.53
In Stock
 $54.53
A115
Kit-control Hsg.
 $54.53

Part Number:753-0833

In Stock

In Stock

Note: (Not Shown)
 $54.53
In Stock
 $54.53
A116
Lever-control
 $19.33

Part Number:731-0620A

In Stock

In Stock

Note: (Not Shown)
 $19.33
In Stock
 $19.33
A117
Height Adjustment Kn
 $17.09

Part Number:731-13116-1

In Stock

In Stock

Note: (Optional Parts)
 $17.09
In Stock
 $17.09
A118
Screw-fl C-sunk Ab
 $4.55

Part Number:710-0841

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $4.55
Usually ships in 7 - 12 business days
 $4.55
A119
Nut-nylon Lk 1/4x2
Minimum Quantity of 2 Required
 $3.99

Part Number:712-0324

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: Part of Motor, Switch & Cord Ass\\\\\\\'y. Comp. (Ref. 49)
 $3.99
Usually ships in 7 - 12 business days
 $3.99
A121
Bolt-carriage-curv Obsolete - Not Available
 $3.99

Part Number:910-0671

Discontinued

Discontinued
 $3.99
Discontinued
A122
Pin-shld 3/8-24x1. Obsolete - Not Available
 $3.99

Part Number:711-0805

Discontinued

Discontinued
 $3.99
Discontinued
A123
Use 936-0169
Minimum Quantity of 2 Required
 $3.99

Part Number:736-0169

In Stock

In Stock
 $3.99
In Stock
 $3.99
A129
Cable-control Obsolete - Not Available
 $16.63

Part Number:946-0480A

Discontinued

Discontinued
 $16.63
Discontinued
A130
Ratchet
 $12.67

Part Number:948-0318

In Stock

In Stock

Note: Models 820 Thru 829
 $12.67
In Stock
 $12.67
A131
Cotter Pin 1/8" Dia.
 $3.99

Part Number:714-0115

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $3.99
Usually ships in 7 - 12 business days
 $3.99
A132
Jam Nut 3/8-24
Minimum Quantity of 2 Required
 $4.49

Part Number:712-0711

In Stock

In Stock

Note: for Faster Service Obtain Standard Nuts, Bolts and Washers Locally. if These Items Cannot Be Obtained Locally, Order by Part Num
 $4.49
In Stock
 $4.49
A133
Deflector-side Chu Obsolete - Not Available
 $24.51

Part Number:731-0884

Discontinued

Discontinued
 $24.51
Discontinued
A134
Use 941-0522
 $8.87

Part Number:741-0522

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $8.87
Usually ships in 7 - 12 business days
 $8.87
A135
Control Housing Comp. Obsolete - Not Available
 $21.99

Part Number:753-0430A

Discontinued

Discontinued
 $21.99
Discontinued
A136
Spring
Minimum Quantity of 2 Required
 $4.99

Part Number:10622B

In Stock

In Stock
 $4.99
In Stock
 $4.99
A138
Chain Cover Obsolete - Not Available
 $2.99

Part Number:17053A

Discontinued

Discontinued
 $2.99
Discontinued
A140
Screw-hex Wash Sf
Minimum Quantity of 2 Required
 $4.44

Part Number:710-0599

In Stock

In Stock

Note: Not Used on Units With Electric P.T.O.
 $4.44
In Stock
 $4.44
A144
Fl-wash. .385 I.d. X .87
Minimum Quantity of 2 Required
 $4.99

Part Number:736-0300

In Stock

In Stock
 $4.99
In Stock
 $4.99
A147
Rear Axle Ass'y. Obsolete - Not Available
 $62.61

Part Number:938-0719A

Discontinued

Discontinued
 $62.61
Discontinued
A148
Bearing-hex Flange
 $8.14

Part Number:741-0324A

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: Models 820 Thru 829
 $8.14
Usually ships in 7 - 12 business days
 $8.14
A149
Washer-fl
 $4.49

Part Number:936-0160

In Stock

In Stock

Note: (Not Part of Deck Assembly Complete)
 $4.49
In Stock
 $4.49
A151
Bearing-nyliner
 $6.26

Part Number:741-0491

In Stock

In Stock
 $6.26
In Stock
 $6.26
A152
Screw-1/4-20 X .62
Minimum Quantity of 2 Required
 $4.18

Part Number:710-0751

In Stock

In Stock

Note: for Faster Service Obtain Standard Nuts, Bolts and Washers Locally. if These Items Cannot Be Obtained Locally, Order by Part Num
 $4.18
In Stock
 $4.18
A153
Transmission-comp Obsolete - Not Available
 $239.49

Part Number:917-0417B

Discontinued

Discontinued

Note: (See Breakdown)
 $239.49
Discontinued
A154
Bearing-cup Hex Obsolete - Not Available
 $9.50

Part Number:16500A-0637

Discontinued

Discontinued

Note: Part of Transmission Complete, Ref. No. 36.
 $9.50
Discontinued
A155
Screw-hex B-tap #
 $3.99

Part Number:910-0429

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: (Optional Parts)
 $3.99
Usually ships in 7 - 12 business days
 $3.99
A156
Screw-hex 3/8-24 X
 $6.02

Part Number:710-1055

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: Blade 3 Bolt Mount
 $6.02
Usually ships in 7 - 12 business days
 $6.02
A157
Use 936-0169
Minimum Quantity of 2 Required
 $3.99

Part Number:736-0169

In Stock

In Stock
 $3.99
In Stock
 $3.99
A158
Nut-hex 3/8-24
Minimum Quantity of 2 Required
 $5.50

Part Number:712-0241

In Stock

In Stock

Note: for Faster Service Obtain Standard Nuts, Bolts and Washers Locally. if These Items Cannot Be Obtained Locally, Order by Part Num
 $5.50
In Stock
 $5.50
A160
Flat Washer, .510x .750 X .033
 $8.64

Part Number:936-0108

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $8.64
Usually ships in 7 - 12 business days
 $8.64
A161
Frame-catcher-rr
 $51.17

Part Number:749-0764A-0637

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: New Part
 $51.17
Usually ships in 7 - 12 business days
 $51.17
A162
Nut-jam Lock 3/8-1
Minimum Quantity of 2 Required
 $4.90

Part Number:712-0266A

In Stock

In Stock

Note: for Models 587b, 596 and 598.
 $4.90
In Stock
 $4.90
A163
Wire Harness Obsolete - Not Available
 $41.32

Part Number:725-1538

Discontinued

Discontinued
 $41.32
Discontinued
A164
Screw-tap .215 X 1
Minimum Quantity of 2 Required
 $5.57

Part Number:710-0969

In Stock

In Stock

Note: If Equipped
 $5.57
In Stock
 $5.57
A165
Holder-fuse Obsolete - Not Available
 $44.23

Part Number:925-1428

Discontinued

Discontinued

Note: If Equipped
 $44.23
Discontinued
A
Fuse-7.5 Amp Obsolete - Not Available
 $4.99

Part Number:925-0298

Discontinued

Discontinued

Note: If Equipped
 $4.99
Discontinued
Page B
MTD 121-838E000 (1991) Lawn Mower Page B Diagram
 Fig #
B1
Screw-hex
 $6.28

Part Number:710-1062

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: for Faster Service Obtain Standard Nuts, Bolts and Washers Locally. if Items Cannot Be Obtained Locally, Order by Part Number an
 $6.28
Usually ships in 7 - 12 business days
 $6.28
B2
Washer-lock
Minimum Quantity of 2 Required
 $5.57

Part Number:936-0329

In Stock

In Stock

Note: (for Model E633e)
 $5.57
In Stock
 $5.57
B3
Upper Hsg Hf Obsolete - Not Available
 $90.76

Part Number:717-0418A

Discontinued

Discontinued
 $90.76
Discontinued
B4
#48 Sprocket 7 Tooth X 1/2 Pitch Obsolete - Not Available
 $4.99

Part Number:713-0400

Discontinued

Discontinued
 $4.99
Discontinued
B5
Washer-fl
Minimum Quantity of 2 Required
 $4.49

Part Number:936-0336

In Stock

In Stock

Note: Use Applicable Flat Washers in This Application Allowing .006/.014 In. End-Play.
 $4.49
In Stock
 $4.49
B6
Bearing-hex Flange
 $10.48

Part Number:941-0413

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: Part of Transmission Complete, Ref. No. 36.
 $10.48
Usually ships in 7 - 12 business days
 $10.48
B7
Bearing-cup Hex Obsolete - Not Available
 $9.50

Part Number:16500A-0637

Discontinued

Discontinued

Note: Part of Transmission Complete, Ref. No. 36.
 $9.50
Discontinued
B8
Thrust Wash. .382" I.d. X
 $6.49

Part Number:736-0314

In Stock

In Stock
 $6.49
In Stock
 $6.49
B9
Bearing-thrust
 $14.21

Part Number:741-0479

In Stock

In Stock

Note: Part of Transmission Complete, Ref. No. 36.
 $14.21
In Stock
 $14.21
B11
Shaft-pinion 11 T Obsolete - Not Available
 $33.26

Part Number:917-1216

Discontinued

Discontinued

Note: Part of Transmission Complete, Ref. No. 36.
 $33.26
Discontinued
B12
Bearing-flange
 $5.60

Part Number:748-0208A

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: Part of Transmission Complete, Ref. No. 36.
 $5.60
Usually ships in 7 - 12 business days
 $5.60
B13
Seal-oil-.375 Id Obsolete - Not Available
 $9.72

Part Number:721-0212

Discontinued

Discontinued

Note: Part of Transmission Complete, Ref. No. 36.
 $9.72
Discontinued
B15
Pulley Obsolete - Not Available
 $30.64

Part Number:756-0330A

Discontinued

Discontinued

Note: Not Part of Transmission Complete - Not Part of Transmission Complete
 $30.64
Discontinued
B16
Washer-spring Bell
Minimum Quantity of 2 Required
 $4.18

Part Number:736-0270

In Stock

In Stock

Note: If Equipped - Not Part of Transmission Complete
 $4.18
In Stock
 $4.18
B17
Nut-jam 1/4-28 Lh
 $18.69

Part Number:712-04326

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: Not Part of Transmission Complete - Not Part of Transmission Complete
 $18.69
Usually ships in 7 - 12 business days
 $18.69
B18
Spacer-shld
 $6.28

Part Number:738-0440

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: Not Part of Transmission Complete - Not Part of Transmission Complete
 $6.28
Usually ships in 7 - 12 business days
 $6.28
B19
Washer, Flat, .385 X 1.0 X .03
Minimum Quantity of 2 Required
 $4.76

Part Number:736-0344

In Stock

In Stock

Note: Not Part of Transmission Complete - Not Part of Transmission Complete
 $4.76
In Stock
 $4.76
B20
Screw-shld
 $15.83

Part Number:938-0826

In Stock

In Stock

Note: Not Part of Transmission Complete - Not Part of Transmission Complete
 $15.83
In Stock
 $15.83
B21
Pulley
 $12.75

Part Number:956-0558

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: Not Part of Transmission Complete - Not Part of Transmission Complete
 $12.75
Usually ships in 7 - 12 business days
 $12.75
B22
Use 941-0556
 $18.26

Part Number:741-0556

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: Not Part of Transmission Complete
 $18.26
Usually ships in 7 - 12 business days
 $18.26
B23
Washer-spring Bell
Minimum Quantity of 2 Required
 $4.18

Part Number:736-0270

In Stock

In Stock

Note: If Equipped - Not Part of Transmission Complete
 $4.18
In Stock
 $4.18
B24
Bracket Assy-idler Obsolete - Not Available
 $30.51

Part Number:17052A

Discontinued

Discontinued

Note: Not Part of Transmission Complete - Not Part of Transmission Complete
 $30.51
Discontinued
B25
Hex Patch L-nut 1/4-28 Thd
 $6.03

Part Number:712-0138

In Stock

In Stock

Note: (Not Part of Transmission Complete) - Not Part of Transmission Complete
 $6.03
In Stock
 $6.03
B26
Extension Spring 1.12
Minimum Quantity of 2 Required
 $3.99

Part Number:732-0357A

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: New Part Not Part of Transmission Complete - Not Part of Transmission Complete
 $3.99
Usually ships in 7 - 12 business days
 $3.99
B27
Lower Hsg. Half
 $34.90

Part Number:717-0419B

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: New Part
 $34.90
Usually ships in 7 - 12 business days
 $34.90
B28
Bearing-flange
 $10.57

Part Number:941-0415

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: Part of Transmission Complete, Ref. No. 36.
 $10.57
Usually ships in 7 - 12 business days
 $10.57
B29
Shaft Assembly W Obsolete - Not Available
 $141.85

Part Number:717-0616A

Discontinued

Discontinued
 $141.85
Discontinued
B30
Bearing-flange
 $13.41

Part Number:741-0414

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: Part of Transmission Complete, Ref. No. 36.
 $13.41
Usually ships in 7 - 12 business days
 $13.41
B31
Seal-oil
 $11.44

Part Number:721-0213

In Stock

In Stock

Note: Part of Transmission Complete, Ref. No. 36.
 $11.44
In Stock
 $11.44
B32
Shaft Assembly W Obsolete - Not Available
 $141.85

Part Number:717-0616A

Discontinued

Discontinued
 $141.85
Discontinued
B33
Washer-lock #10 Obsolete - Not Available
 $6.69

Part Number:936-0722

Discontinued

Discontinued

Note: Part of Transmission Complete, Ref. No. 36.
 $6.69
Discontinued
B34
Screw-hex Wash Hd
 $3.99

Part Number:710-0651

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: Part of Transmission Complete, Ref. No. 36.
 $3.99
Usually ships in 7 - 12 business days
 $3.99
B35
Washer-hex Obsolete - Not Available
 $3.99

Part Number:936-0410

Discontinued

Discontinued

Note: Not Part of Transmission Complete - Not Part of Transmission Complete
 $3.99
Discontinued
B36
Transmission Belt Guard Obsolete - Not Available
 $2.99

Part Number:17718

Discontinued

Discontinued

Note: (Not Part of Transmission Complete) - Not Part of Transmission Complete
 $2.99
Discontinued
B37
Cover-belt Obsolete - Not Available
 $5.46

Part Number:17064-0637

Discontinued

Discontinued
 $5.46
Discontinued
B38
Screw-hex B-tap 1
 $5.76

Part Number:710-0352

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: Not Part of Transmission Complete - Not Part of Transmission Complete
 $5.76
Usually ships in 7 - 12 business days
 $5.76
B39
Screw-hex Wash Sf
Minimum Quantity of 2 Required
 $4.44

Part Number:710-0599

In Stock

In Stock

Note: Not Used on Units With Electric P.T.O. - Not Part of Transmission Complete
 $4.44
In Stock
 $4.44
B40
Hex Wash. Scr. 1/4-14 X .625
Minimum Quantity of 2 Required
 $4.44

Part Number:710-0896

In Stock

In Stock
 $4.44
In Stock
 $4.44
B41
Nut-hex 1/4-20 Obsolete - Not Available
 $5.62

Part Number:912-0287

Discontinued

Discontinued

Note: for Faster Service Obtain Standard Nuts, Bolts and Washers Locally. if Items Cannot Be Obtained Locally, Order by Part Number an - Not Part of Transmission Complete
 $5.62
Discontinued
B42
Washer-spring Bell
Minimum Quantity of 2 Required
 $4.18

Part Number:736-0270

In Stock

In Stock

Note: If Equipped - Not Part of Transmission Complete
 $4.18
In Stock
 $4.18
B43
Washer-lock
Minimum Quantity of 2 Required
 $5.57

Part Number:936-0329

In Stock

In Stock

Note: (for Model E633e) - Not Part of Transmission Complete
 $5.57
In Stock
 $5.57
B44
Cable-clutch
 $41.00

Part Number:946-0710A

In Stock

In Stock

Note: Not Part of Transmission Complete - Not Part of Transmission Complete
 $41.00
In Stock
 $41.00
B45
S.P. Belt Guard Obsolete - Not Available
 $3.60

Part Number:747-0549

Discontinued

Discontinued

Note: (Not Part of Transmission Complete) - Not Part of Transmission Complete
 $3.60
Discontinued
B
Transmission-comp Obsolete - Not Available
 $239.49

Part Number:917-0417B

Discontinued

Discontinued

Note: (See Breakdown)
 $239.49
Discontinued
 Fig #
Lawn Mower Parts

Repair Guides for MTD Lawn Mower 121-838E000 (1991)

Lawn and Garden Machines and Power Tools

This article lists the major categories of lawn and garden tools and machines, explaining the basic applications, types, and features of each.

How to Replace a Lawn Mower Blade

Lawn mower blades must be replaced after so many hours of cutting, and the steps in this article explain how to perform this simple parts replacement.

How to Winterize Power Tools and Machines

This video explains how to properly winterize power tools and machines for winter storage, increasing the life and performance of seasonal tools.

Cordless Power Tool Buying Guide: How to Choose Battery Type

A good cordless tool battery will help a tool perform its best, and this buying guide gives shoppers the info they need to get the most out of their cordless tools.

Questions & Answers for MTD 121-838E000 (1991)

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