Troy-Bilt 521, 721 manual Ref. No Description

Models 521 and 721

19

16 24

18

15 7

5

11

10

1517

8

6

25

23

4

22

1

Engine is for reference only and may not resemble the engine on your snow thrower.

9

	13
		3
		21
	13	14 2
3

20

Ref. No.	Part No.	Description
1.	629-0071	Extension Cord
2.	710-0157	Hex Bolt 5/16-24 x 0.75”
3.	710-0409	Hex Bolt 5/16-24 x 1.75”
4.	710-0502A	TT Sems Screw
5.	710-0751	Hex Screw 1/4-20 x 0.620”
6.	710-1003	B Screw #10-16 x 0.625”
7.	710-3013	Hex Screw 1/4-20 x 0.50”
8.	712-3006	Hex Nut 1/4-20
9.	719-0581	Spacer
10.	726-0205	Hose Clamp
11.	731-2825	Choke Knob
13.	736-0119	Lock Washer

Ref. No.	Part No.	Description
14.	736-0242	Beleville Washer
15.	736-0329	Lock Washer
16.	741-0475	Plastic Bushing
17.	751-0535	Fuel Line Hose
18.	751-0540A	Gas Tank
19.	751-0603	Fuel Cap
20.	754-0101A	V-Belt
21.	756-0416B	V-Pulley Half
22.	756-0475	Pulley
23.	784-0322	Engine Mount
24.	784-0323	Support Bracket
25.	784-0374	Support Plate: Engine Mount

14