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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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$22.13
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21% OFF Phone Price : $28.13
In Stock
Handle Bolt 131959
#7

Engine/housing/handle/bag diagram

Handle bolt

Part #131959

Replaced by #532191574

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Manufacturer substitution
This part replaces 131959. Substitute parts can look different from the original.
BEST SELLER
$7.98
| 
11% OFF Phone Price : $8.98
In Stock
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
This item is not returnable
$5.11
In Stock
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.
BEST SELLER
This item is not returnable
$2.64
| 
27% OFF Phone Price : $3.64
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

?
Manufacturer substitution
This part replaces 12000058. Substitute parts can look different from the original.
This item is not returnable
$5.11
In Stock
Lock Nut 73800500
#24

Engine/housing/handle/bag diagram

Lock nut

Part #73800500

The manufacturer no longer makes this part, and there's no substitute part

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
Poulan Bracket Handle 181021X479
#20

Engine/housing/handle/bag diagram

Poulan bracket handle

Part #181021X479

$9.99
In Stock
Plate Trigger 181363X479
#47

Wheels/tires diagram

Plate trigger

Part #181363X479

$15.99
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 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....

Read more
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

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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