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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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ALL PARTS
Showing 10 of 130 parts  |
Belt, 21-in 175064
#31

Engine/housing/handle/bag diagram

Belt, 21-in

Part #175064

Replaced by #532406712

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Manufacturer substitution
This part replaces 175064. Substitute parts can look different from the original.
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$22.79 | 
21% OFF Phone Price : $28.79
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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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This item is not returnable
$5.31 | 
16% OFF Phone Price : $6.31
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Nut 132004
#5

Engine/housing/handle/bag diagram

Nut

Part #132004

Replaced by #582478602

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Manufacturer substitution
This part replaces 132004. Substitute parts can look different from the original.
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$2.64 | 
27% OFF Phone Price : $3.64
In Stock
Lawn & Garden Equipment Hinge Screw 88652
#28

Engine/housing/handle/bag diagram

Lawn & garden equipment hinge screw

Part #88652

Replaced by #532088652

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Manufacturer substitution
This part replaces 88652. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$5.31 | 
16% OFF Phone Price : $6.31
In Stock
Wheel.9x2.je 180763
#32

Wheels/tires diagram

Wheel.9x2.je

Part #180763

Replaced by #532193139

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Manufacturer substitution
This part replaces 180763. Substitute parts can look different from the original.
$54.98 | 
10% OFF Phone Price : $60.98
In Stock
Rope Guide 179585
#4

Engine/housing/handle/bag diagram

Rope guide

Part #179585

Replaced by #586122501

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Manufacturer substitution
This part replaces 179585. Substitute parts can look different from the original.
This item is not returnable
$15.59 | 
11% OFF Phone Price : $17.59
In Stock
Lawn Mower E-ring (replaces 12000057) 12000058
#28

Wheels/tires diagram

Lawn mower e-ring (replaces 12000057)

Part #12000058

Replaced by #812000058

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Manufacturer substitution
This part replaces 12000058. Substitute parts can look different from the original.
This item is not returnable
$5.11
In Stock
Lawn Mower Drive Pawl (replaces 532175098, 5321750-98) 175098
#51

Wheels/tires diagram

Lawn mower drive pawl (replaces 532175098, 5321750-98)

Part #175098

Replaced by #532175098

?
Manufacturer substitution
This part replaces 175098. Substitute parts can look different from the original.
$8.54
In Stock
Lock Nut 88349
#68

Engine/housing/handle/bag diagram

Lock nut

Part #88349

Replaced by #532088349

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Manufacturer substitution
This part replaces 88349. Substitute parts can look different from the original.
This item is not returnable
$6.83
In Stock
Lawn Mower Idler Pulley 166043
#64

Engine/housing/handle/bag diagram

Lawn mower idler pulley

Part #166043

Replaced by #532166043

?
Manufacturer substitution
This part replaces 166043. Substitute parts can look different from the original.
$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 vibrate a lot?

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

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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 run rough?

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

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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 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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Repair guides for gas walk-behind mowers

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

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

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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

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Types of walk-behind mower blades video

Types of walk-behind mower blades video

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