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Husqvarna
Gas Walk-Behind Mower

Model # 5521BBC Official Husqvarna lawn mower

Here are the diagrams and repair parts for Official Husqvarna 5521BBC 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 143 parts  |
Lawn Mower Drive Pinion Torsion Spring (replaces 188291) 532188291
#46

Wheels/tires/gearcase diagram

Lawn mower drive pinion torsion spring (replaces 188291)

Part #532188291

BEST SELLER
This item is not returnable
$5.31 | 
16% OFF Phone Price : $6.31
In Stock
Hex Nut 532132004
#5

Engine/housing/handle/bag 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.
BEST SELLER
This item is not returnable
$2.64 | 
27% OFF Phone Price : $3.64
In Stock
Lawn Mower Screw (replaces 88652) 532088652
#28

Engine/housing/handle/bag diagram

Lawn mower screw (replaces 88652)

Part #532088652

BEST SELLER
This item is not returnable
$5.31 | 
16% OFF Phone Price : $6.31
In Stock
Wheel.9x2.pr 532180774
#32

Wheels/tires/gearcase diagram

Wheel.9x2.pr

Part #532180774

Replaced by #532193139

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Manufacturer substitution
This part replaces 532180774. Substitute parts can look different from the original.
$54.98 | 
10% OFF Phone Price : $60.98
In Stock
Rope Guide 532179585
#4

Engine/housing/handle/bag diagram

Rope guide

Part #532179585

Replaced by #586122501

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Manufacturer substitution
This part replaces 532179585. Substitute parts can look different from the original.
This item is not returnable
$15.59 | 
11% OFF Phone Price : $17.59
In Stock
E-ring 812000058
#28

Wheels/tires/gearcase diagram

E-ring

Part #812000058

This item is not returnable
$5.11
In Stock
Nut 873900400
#74

Engine/housing/handle/bag 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
In Stock
Pawl.drive.21.ez-walk 532175098
#45

Wheels/tires/gearcase diagram

Pawl.drive.21.ez-walk

Part #532175098

$8.54
In Stock
Lawn Mower Nut 532088349
#47

Engine/housing/handle/bag diagram

Lawn mower nut

Part #532088349

This item is not returnable
$6.83
In Stock
Idler Pulley 532166043
#55

Engine/housing/handle/bag diagram

Idler pulley

Part #532166043

$37.31
In Stock

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 run rough?

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

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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 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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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 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 move?

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

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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 replace a lawn mower spark plug

How to replace a lawn mower spark plug

Take a few minutes to replace the spark plug during your lawn mower's annual tune-up or if the spark plug is burnt or cr…

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

How to replace a lawn mower blade

Check your lawn mower blade regularly and replaced it if it's bent or damaged. …

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Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower flywheel key on a flathead engine

How to replace a lawn mower flywheel key on a flathead engine

When you hit a hard object with your mower, the flywheel can shear to protect more expensive components. Learn how to re…

Read more
Repair difficulty
Time required
 45 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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Introducing new technical repair content that we’re developing for the Sears Technical Institute

Introducing new technical repair content that we’re developing for the Sears Technical Institute

Learn about Sears Technical Institute and the advanced technical content being developed for aspiring appliance techs.…

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Top questions about Sears and Sears PartsDirect

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