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Husqvarna
Gas Walk-Behind Mower

Model # 7021RB Official Husqvarna lawn mower

Here are the diagrams and repair parts for Official Husqvarna 7021RB lawn mower, as well as links to manuals and error code tables, if available.

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Owner’s manual

Model diagram and schematic

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ALL PARTS
Showing 10 of 113 parts  |
Lawn Mower Bolt (replaces 191574) 532191574
#7

Engine/housing/handle diagram

Lawn mower bolt (replaces 191574)

Part #532191574

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Lawn Tractor Hex Lock Nut 873800500
#24

Engine/housing/handle diagram

Lawn tractor hex lock nut

Part #873800500

Replaced by #596040501

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Manufacturer substitution
This part replaces 873800500. Substitute parts can look different from the original.
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Craftsman Lawn Mower Transmission Axle Pin (replaces 404845, 5324048-45) 532404845
#31

Drive control/gear case/wheels diagram

Craftsman lawn mower transmission axle pin (replaces 404845, 5324048-45)

Part #532404845

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Craftsman Lawn Mower Transmission Spring (replaces 406558) 532406558
#11

Drive control/gear case/wheels diagram

Craftsman lawn mower transmission spring (replaces 406558)

Part #532406558

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Lawn Mower 21-in Deck Blade (replaces 180459, 5321804-59) 532180459
#31

Engine/housing/handle diagram

Lawn mower 21-in deck blade (replaces 180459, 5321804-59)

Part #532180459

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Hex Nut 532132004
#5

Engine/housing/handle diagram

Hex nut

Part #532132004

Replaced by #582478602

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Manufacturer substitution
This part replaces 532132004. Substitute parts can look different from the original.
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Guide.rope.s 532194788
#4

Engine/housing/handle diagram

Guide.rope.s

Part #532194788

Replaced by #586122501

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This part replaces 532194788. Substitute parts can look different from the original.
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Lawn Mower Ground Drive Belt (replaces 406580) 532406580
#44

Drive control/gear case/wheels diagram

Lawn mower ground drive belt (replaces 406580)

Part #532406580

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E-ring 812000058
#28

Drive control/gear case/wheels diagram

E-ring

Part #812000058

This item is not returnable
$5.11
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Nut 873900400
#74

Engine/housing/handle diagram

Nut

Part #873900400

Replaced by #586668901

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Manufacturer substitution
This part replaces 873900400. Substitute parts can look different from the original.
This item is not returnable
$6.83
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Symptoms for gas walk-behind mowers

Choose a symptom to see related walk-behind mower repairs.

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Why does my lawn mower stall?

Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent…

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Why won't my lawn mower start?

Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba…

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Why does my lawn mower cut unevenly?

Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade…

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Why won't my lawn mower move?

Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel…

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Why does my lawn mower run rough?

Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key…

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Why does my lawn mower vibrate a lot?

Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up…

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Repair guides for gas walk-behind mowers

These step-by-step repair guides will help you safely fix what’s broken on your walk-behind lawn mower.

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How to rebuild a lawn mower carburetor

How to rebuild a lawn mower carburetor

The carburetor mixes air with fuel to drive the piston. Rebuild the carburetor if it's clogged or leaks.…

Read more
Repair difficulty
Time required
 60 minutes or less
How to replace a lawn mower recoil starter on an OHV engine

How to replace a lawn mower recoil starter on an OHV engine

Replace the recoil starter if it doesn't move when you pull the starter rope.…

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Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower wheel

How to replace a lawn mower wheel

Learn how replace a damaged wheel on a walk-behind lawn mower—it's a quick, easy fix.…

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Repair difficulty
Time required
 15 minutes or less

Effective articles & videos to help repair your walk-behind mowers

Use the advice and tips in these articles and videos to get the most out of your walk-behind lawn mower.

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How to enjoy all the online benefits we offer on our Sears PartsDirect website

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

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Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

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Types of walk-behind mower blades video

Types of walk-behind mower blades video

Learn about the different kinds of mower blades and how to maintain them.…

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