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Poulan
Gas Walk-Behind Mower

Model # PR55N21CHE Official Poulan rotary lawn mower

Here are the diagrams and repair parts for Official Poulan PR55N21CHE rotary lawn mower, as well as links to manuals and error code tables, if available.

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Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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Model diagram and schematic

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Showing 10 of 69 parts  |
Belt, 21-in 175064
#56

Engine/housing/wheels/handle 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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Handle Bolt 131959
#6

Engine/housing/wheels/handle 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.
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$7.98
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11% OFF Phone Price : $8.98
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Nut Lck 5/16 73990500
#35

Engine/housing/wheels/handle 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.
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$5.11
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Nut 132004
#73

Engine/housing/wheels/handle 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
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Lawn & Garden Equipment Lock Nut 73800400
#5

Engine/housing/wheels/handle diagram

Lawn & garden equipment lock nut

Part #73800400

Replaced by #582478602

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Manufacturer substitution
This part replaces 73800400. Substitute parts can look different from the original.
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$2.64
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Mulcher Door 165754
#10

Engine/housing/wheels/handle diagram

Mulcher door

Part #165754

Replaced by #532165754

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Manufacturer substitution
This part replaces 165754. Substitute parts can look different from the original.
This item is not returnable
$13.31
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13% OFF Phone Price : $15.31
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Rope Guide 179585
#4

Engine/housing/wheels/handle 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
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11% OFF Phone Price : $17.59
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Torsion Spring 152124
#28

Engine/housing/wheels/handle diagram

Torsion spring

Part #152124

Replaced by #532152124

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Manufacturer substitution
This part replaces 152124. Substitute parts can look different from the original.
This item is not returnable
$7.98
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11% OFF Phone Price : $8.98
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Selector 170143
#33

Engine/housing/wheels/handle diagram

Selector

Part #170143

Replaced by #532087877

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Manufacturer substitution
This part replaces 170143. Substitute parts can look different from the original.
This item is not returnable
$5.31
| 
16% OFF Phone Price : $6.31
In Stock
Lock Nut 73800500
#24

Engine/housing/wheels/handle diagram

Lock nut

Part #73800500

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

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

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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....

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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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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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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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