Bolens 721 manual Models 521

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Models 521 and 721

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REF.	PART
NO.	NO.	DESCRIPTION
1	710-04071	Carriage Screw, 5/16-18 x 1.0
2	710-0451	Carriage Bolt, 5/16-18 x.075 GR 1
3	712-3068	Hex Patch I-Nut 5/16-18‘
4	720-0284	Handle Knob Assembly 5/16-18
5	731-04127	Lower Chute 5” Dia
6	731-04353	Ring-Lower Chute
7	731-04373	Chute, Adapter 5” Dia
8	731-04388	Handle-Chute 5” Dia
9	731-04429	Upper Chute w/Export Label
10	732-04111	Chute Adjustment Spring
11	736-0159	Flat Washer,.349 ID x .879 OD x .063
12	684-04049	Lower Chute Ass’y (Incl. #5-7 and 10)

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Contents Operator’s Manual Table of Contents Preparation Important Safe Operation PracticesTraining Maintenance & Storage Your ResponsibilityAssembling Your Snow Thrower Items Required For AssemblyBefore Assembly Raising Upper Handle Unpacking From CartonKnow Your Snow Thrower Auger Control HandleGas and Oil Fill-Up Operating Your Snow ThrowerBefore Starting To Start EngineOperating Tips To Stop EngineOperating the Snow Thrower Shave PlateControl Cable Maintaining Your Snow ThrowerCarburetor Replacing BeltReplacing the Auger’s Rubber Paddles EngineLubrication Troubleshooting Guide Problem Cause RemedyParts List for Models 521 Models 521 Models 521 Models 521 MANUFACTURER’S Limited Warranty for