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15
9
V-BELTS are specially designed to engage and
disengage safely. A substitute (non-OEM) V-Belt can
be dangerous by not disengaging completely.
† Optional
NOTE: Specifications are
subject to change without
notification or obligation.
Images my not reflect your
exact model and are for
reference purposes only.
Ref Part Number Part Description
1 710-0870 Hex Head Screw 3/8-16
2 711-04362 Axle .50 x 3.8
3 711-04440 Axle .50 x 9.25
4 726-0299 Push Cap 1/2” rod
5 732-04045 Torsion Spring
6 734-1987 Wheel 8x1.8
7 734-1988 Wheel 7x1.8
8 736-0232 Wave Washer
9 738-0929 Shoulder Screw, 3/8-16
10 750-04129 Spacer
11 750-04427 Spacer, .525 x .775 x .1125
12 750-04428 Spacer, .525 x .775 x .3125
13 787-01240 Wheel Bracket
14 710-0191 Screw 3/8-24
15 710-0411 Screw 3/8-16
16 710-0654A Screw, 3/8-16
17 712-04065 Flange Lock Nut, 3/8-16
18 731-05063 Debris Guard
19 736-0452 Bell Washer, .396 x 1.140
20 750-04142 Pulley Mount Spacer
21 756-04148 Flat Idler Pulley, 2.5 OD
22 756-1150A Combination Flywheel Pulley
23 787-01304 Frame
24 710-0726 Hex Screw, 5/16-12
25 710-1174 Carriage Bolt, 5/16-18
26 710-1205 Rope Guide (Eye Bolt)
27 710-3180 Hex Screw, 5/16-18
28 712-04063 Lock Flange Nut, 5/16-18
29 720-0142 Grip
30 720-0279 Wing Nut
31 720-04072 Hand Knob
Ref Part Number Part Description
32 732-0369 Compression Spring
33 746-04052 Control Cable (Tecumseh)
34 746-04036 Wheel Adjustment Cable
35 747-0976A Blade Control
36 749-04183 Upper Handle
37 749-04234 Lower Handle
38 781-0741A Depth Index Bracket
39 781-0742 Depth Index Lever
40 687-02126 Blade Plate Assembly
41 710-04389 Hex Screw, 5/16-18
42 710-0599 Self-tapping Screw, 1/4-20
43 710-1143A Hex Screw, 5/8-18
44 712-0417A Flange Nut, 5/8-18
45 714-0104 Cotter Pin
46 711-1017 Clevis Pin
47 718-04012 Bearing Cup
48 731-04207 Bearing Block
49 731-05064 Blade Guard
50 732-04169 Compression Spring
51 736-0342 Flat Washer, .260 x.72
52 736-04088 Flat Washer .635x1.24x.181
53 738-0706C Shoulder Screw
54 741-0524 Bearing, .625 ID x 1.57 OD
55 750-04105 Spacer, .63 x 1.12 x 1.06
56 750-0547 Spacer, .64 x.88 x .50
57 754-04032B Belt
58 756-0449 Sheave
59 781-0080 Blade
60 781-0427 Belt Guard
61 787-01075A Cover Plate
For parts and/or
accessories please call
1-330-220-4683, or
1-800-800-7310
www.mtdproducts.com
Part List:
Handle/Frame/
Wheel Assembly
Model 521