Troy-bilt 521 User Manual

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Single Stage
Snow Thrower
Models 521 & 721
PRINTED IN U.S.A.
Operator’s Manual
FORM NO
.
769-00309.fm
(8/2002)
IMPORTANT: Read safety rules and instructions carefully before operating equipment.
TROY-BILT LLC. P.O. BOX 361131 CLEVELAND, OHIO 44136-0019
Warning: This unit is equipped with an internal combustion engine and should not be used on or near any unimproved forest-
covered, brush-covered or grass-covered land unless the engine’s exhaust system is equipped with a spark arrester meeting
applicable local or state laws (if any). If a spark arrester is used, it should be maintained in effective working order by the operator.
In the State of California the above is required by law (Section 4442 of the California Public Resources Code). Other states may have
similar laws. Federal laws apply on federal lands. A spark arrester for the muffler is available through your nearest engine authorized
service dealer or contact the service department, P.O. Box 361131 Cleveland, Ohio 44136-0019.
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Summary of Contents

Page 1 - Operator’s Manual

Single StageSnow ThrowerModels 521 & 721PRINTED IN U.S.A.Operator’s ManualFORM NO. 769-00309.fm(8/2002)IMPORTANT: Read safety rules and instructio

Page 2 - ENGINE INFORMATION

10SECTION 6: MAINTAINING YOUR SNOW THROWERReplacing Belt• Remove the belt cover by removing five hex screws. See Figure 12.Figure 12• Pull up on the

Page 3 - Preparation

11SECTION 8: TROUBLESHOOTING GUIDENOTE: For repairs beyond the minor adjustments listed above, contact your nearest authorized servicerepresentative

Page 4 - Maintenance & Storage

12SECTION 9: PARTS LIST FOR MODELS 521 AND 7211592166216214201624141723382210132125607181111191255526272829303132333435363738394033414243444546474849

Page 5

13Ref. No. Part No. Part Description1.684-0174 Upper Chute Crank Assemby2.684-0177 Lower Chute Crank Assembly3.684-0178 Bracket Assembly: Mitten Grip4

Page 6 - Assembling Discharge Chute

14Models 521 and 721Ref. No. Part No. Description1.629-0071 Extension Cord 2.710-0157 Hex Bolt 5/16-24 x 0.75”3.710-0409 Hex Bolt 5/16-24 x 1.75”4.71

Page 7 - To Start Engine

15Models 521 and 721Ref. No. Part No. Description1.710-0487 Carriage Screw 5/16-18 x 2.0”2.710-1270 Machine Screw3.712-0324 Hex Lock Nut 1/4-204.720-

Page 8 - Operating Tips

MANUFACTURER’S LIMITED WARRANTY FOR:The limited warranty set forth below is given by Troy-Bilt LLC with respect to new merchandise purchased and used

Page 9 - Carburetor

2TABLE OF CONTENTSContent PageImportant Safe Operation Practices ... 3A

Page 10 - Lubrication

3SECTION 1: IMPORTANT SAFE OPERATION PRACTICESDANGER: This machine was built to be operated according to the rules for safe operation in this manual.

Page 11

44. Never operate with a missing or damaged discharge chute. Keep all safety devices in place and working.5. Never run an engine indoors or in a poorl

Page 12

5SECTION 2: ASSEMBLING YOUR SNOW THROWERUnpacking From Carton• Cut along corners of the carton and lay it down flat. Remove packing material. • Remov

Page 13 - Models 521 & 721

6handle. Hold the “Z” fitting with the pliers, not the cable, to avoid damaging the cable.NOTE: The upper hole in the control handle providesfor adjus

Page 14 - Models 521 and 721

7Discharge Chute The angle of the discharge chute controls the distance that the snow is thrown. Tilt the discharge chute up for greater distance; til

Page 15

8• If you have a grounded three-prong receptacle, proceed as follows. • Rotate choke lever to FULL position.• Connect power cord to switch box on dash

Page 16

9SECTION 5: MAKING ADJUSTMENTSShave Plate • To check the adjustment of the shave plate, place the unit on a level surface. See Figure 8. The wheels,

Related models: 721

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