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Poulan
Gas Walk-Behind Mower

Model # PR55R21AC Official Poulan rotary lawn mower

Here are the diagrams and repair parts for Official Poulan PR55R21AC rotary lawn mower, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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Showing 10 of 130 parts  |
Lock Nut 83923
#42

Wheels/tires diagram

Lock nut

Part #83923

Replaced by #532409149

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Manufacturer substitution
This part replaces 83923. Substitute parts can look different from the original.
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Pipe Fitting 132010
#8

Wheels/tires diagram

Pipe fitting

Part #132010

Replaced by #532409149

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Manufacturer substitution
This part replaces 132010. Substitute parts can look different from the original.
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Hex Flange Lock Nut 145212
Hex flange lock nut

Part #145212

Replaced by #532409149

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Manufacturer substitution
This part replaces 145212. Substitute parts can look different from the original.
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Dust Cover 180504
#29

Wheels/tires diagram

Dust cover

Part #180504

Replaced by #581840401

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Manufacturer substitution
This part replaces 180504. Substitute parts can look different from the original.
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Nut Lck 5/16 73990500
#11

Engine/housing/handle/bag diagram

Nut lck 5/16

Part #73990500

Replaced by #596040501

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Manufacturer substitution
This part replaces 73990500. Substitute parts can look different from the original.
BEST SELLER
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Lock Nut 73800500
#24

Engine/housing/handle/bag diagram

Lock nut

Part #73800500

Replaced by #596040501

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Manufacturer substitution
This part replaces 73800500. Substitute parts can look different from the original.
BEST SELLER
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$5.11
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Torsion Spring 175267
#52

Wheels/tires diagram

Torsion spring

Part #175267

Replaced by #532188291

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Manufacturer substitution
This part replaces 175267. Substitute parts can look different from the original.
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Washer 67725
#57

Wheels/tires diagram

Washer

Part #67725

Replaced by #532067725

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Manufacturer substitution
This part replaces 67725. Substitute parts can look different from the original.
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Washer 52160
#60

Wheels/tires diagram

Washer

Part #52160

Replaced by #596040101

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Manufacturer substitution
This part replaces 52160. Substitute parts can look different from the original.
This item is not returnable
$5.11
In Stock
Lawn Mower Wheel 172323
#40

Wheels/tires diagram

Lawn mower wheel

Part #172323

Replaced by #532150339

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Manufacturer substitution
This part replaces 172323. Substitute parts can look different from the original.
$32.98 | 
15% OFF Phone Price : $38.98
In Stock

Symptoms for gas walk-behind mowers

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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

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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 transmission

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Learn how to replace the transmission on your lawn mower if it's locked up or won't drive the wheels.…

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Repair difficulty
Time required
 60 minutes or less
How to replace a lawn mower carburetor

How to replace a lawn mower carburetor

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

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Time required
 15 minutes or less

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Types of walk-behind mower blades video

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