
Ref  | Part Number | 
  | Part Description | 
  | 
  | 
  | Hex Head Screw   | 
  | |
1  | 
  | 
  | ||
  | 
  | 
  | 
  | 
  | 
2  | 
  | Axle .50 x 3.8  | 
  | |
  | 
  | 
  | 
  | 
  | 
3  | 
  | Axle .50 x 9.25  | 
  | |
  | 
  | 
  | 
  | 
  | 
4  | 
  | Push Cap 1/2” rod  | 
  | |
  | 
  | 
  | 
  | 
  | 
5  | 
  | Torsion Spring  | 
  | |
  | 
  | 
  | 
  | 
  | 
6  | 
  | Wheel 8x1.8  | 
  | |
  | 
  | 
  | 
  | 
  | 
7  | 
  | Wheel 7x1.8  | 
  | |
  | 
  | 
  | 
  | 
  | 
8  | 
  | Wave Washer  | 
  | |
  | 
  | 
  | 
  | 
  | 
9  | 
  | Shoulder Screw,   | 
  | |
  | 
  | 
  | 
  | 
  | 
10  | 
  | Spacer  | 
  | |
  | 
  | 
  | 
  | 
  | 
11  | 
  | Spacer, .525 x .775 x .1125  | 
  | |
  | 
  | 
  | 
  | 
  | 
12  | 
 | 
  | Spacer, .525 x .775 x .3125  | 
  | 
  | 
  | 
  | 
  | 
  | 
13  | 
  | Wheel Bracket  | 
  | |
  | 
  | 
  | 
  | 
  | 
14  | 
  | Screw   | 
  | |
  | 
  | 
  | 
  | 
  | 
15  | 
  | Screw   | 
  | |
  | 
  | 
  | 
  | 
  | 
16  | 
  | Screw,   | 
  | |
  | 
  | 
  | 
  | 
  | 
17  | 
  | Flange Lock Nut,   | 
  | |
  | 
  | 
  | 
  | 
  | 
18  | 
  | Debris Guard  | 
  | |
  | 
  | 
  | 
  | 
  | 
19  | 
  | Bell Washer, .396 x 1.140  | 
  | |
  | 
  | 
  | 
  | 
  | 
20  | 
  | Pulley Mount Spacer  | 
  | |
  | 
  | 
  | 
  | 
  | 
21  | 
  | Flat Idler Pulley, 2.5 OD  | 
  | |
  | 
  | 
  | 
  | 
  | 
22  | 
  | Combination Flywheel Pulley  | 
  | |
  | 
  | 
  | 
  | 
  | 
23  | 
  | Frame  | 
  | |
  | 
  | 
  | 
  | 
  | 
24  | 
  | Hex Screw,   | 
  | |
  | 
  | 
  | 
  | 
  | 
25  | 
  | Carriage Bolt,   | 
  | |
  | 
  | 
  | 
  | 
  | 
26  | 
  | Rope Guide (Eye Bolt)  | 
  | |
  | 
  | 
  | 
  | 
  | 
27  | 
  | Hex Screw,   | 
  | |
28  | 
  | Lock Flange Nut,   | 
  | |
29  | 
  | Grip  | 
  | |
30  | 
  | Wing Nut  | 
  | |
31  | 
  | Hand Knob  | 
  | 
Ref  | Part Number  | 
  | Part Description  | 
  | 
  | 
  | Compression Spring  | 
  | |
32  | 
  | 
  | ||
  | 
  | 
  | 
  | 
  | 
33  | 
  | Control Cable (Tecumseh)  | 
  | |
  | 
  | 
  | 
  | 
  | 
34  | 
  | Wheel Adjustment Cable  | 
  | |
  | 
  | 
  | 
  | 
  | 
35  | 
  | Blade Control  | 
  | |
  | 
  | 
  | 
  | 
  | 
36  | 
  | Upper Handle  | 
  | |
  | 
  | 
  | 
  | 
  | 
37  | 
  | Lower Handle  | 
  | |
  | 
  | 
  | 
  | 
  | 
38  | 
  | Depth Index Bracket  | 
  | |
  | 
  | 
  | 
  | 
  | 
39  | 
  | Depth Index Lever  | 
  | |
  | 
  | 
  | 
  | 
  | 
40  | 
  | Blade Plate Assembly  | 
  | |
  | 
  | 
  | 
  | 
  | 
41  | 
  | Hex Screw,   | 
  | |
  | 
  | 
  | 
  | 
  | 
42  | 
  | 
  | ||
  | 
  | 
  | 
  | 
  | 
43  | 
  | Hex Screw,   | 
  | |
  | 
  | 
  | 
  | 
  | 
44  | 
  | Flange Nut,   | 
  | |
  | 
  | 
  | 
  | 
  | 
45  | 
  | Cotter Pin  | 
  | |
  | 
  | 
  | 
  | 
  | 
46  | 
  | Clevis Pin  | 
  | |
  | 
  | 
  | 
  | 
  | 
47  | 
  | Bearing Cup  | 
  | |
  | 
  | 
  | 
  | 
  | 
48  | 
  | Bearing Block  | 
  | |
  | 
  | 
  | 
  | 
  | 
49  | 
  | Blade Guard  | 
  | |
  | 
  | 
  | 
  | 
  | 
50  | 
  | Compression Spring  | 
  | |
  | 
  | 
  | 
  | 
  | 
51  | 
  | Flat Washer, .260 x.72  | 
  | |
  | 
  | 
  | 
  | 
  | 
52  | 
  | Flat Washer .635x1.24x.181  | 
  | |
  | 
  | 
  | 
  | 
  | 
53  | 
 | 
  | Shoulder Screw | 
  | 
  | 
  | 
  | 
  | 
  | 
54  | 
 | 
  | Bearing, .625 ID x 1.57 OD  | 
  | 
  | 
  | 
  | 
  | 
  | 
55  | 
  | Spacer, .63 x 1.12 x 1.06  | 
  | |
  | 
  | 
  | 
  | 
  | 
56  | 
  | Spacer, .64 x.88 x .50  | 
  | |
  | 
  | 
  | 
  | 
  | 
57  | 
  | Belt  | 
  | |
  | 
  | 
  | 
  | 
  | 
58  | 
  | Sheave  | 
  | |
  | 
  | 
  | 
  | 
  | 
59  | 
  | Blade  | 
  | |
  | 
  | 
  | 
  | 
  | 
60  | 
  | Belt Guard  | 
  | |
  | 
  | 
  | 
  | 
  | 
61  | 
  | Cover Plate  | 
  | |
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
9
Part List:
Handle/Frame/ Wheel Assembly
Model 521
For parts and/or
accessories please call
www.mtdproducts.com
NOTE: Specifications are subject to change without notification or obligation.
Images my not reflect your exact model and are for reference purposes only.
disengage safely. A substitute 
15