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Poulan
Gas Walk-Behind Mower

Model # PR55N21CB Official Poulan rotary lawn mower

Here are the diagrams and repair parts for Official Poulan PR55N21CB 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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ALL PARTS
Showing 10 of 60 parts  |
Belt, 21-in 175064
#56

Rotary lawn mower 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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Discharge Guard 165760
#31

Rotary lawn mower diagram

Discharge guard

Part #165760

Replaced by #589482402

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Manufacturer substitution
This part replaces 165760. Substitute parts can look different from the original.
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$11.98 | 
14% OFF Phone Price : $13.98
In Stock
Lawn Mower Blade Adapter 851514
#57

Rotary lawn mower diagram

Lawn mower blade adapter

Part #851514

Replaced by #581547901

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Manufacturer substitution
This part replaces 851514. Substitute parts can look different from the original.
BEST SELLER
$19.36 | 
9% OFF Phone Price : $21.36
In Stock
Nut 132004
#73

Rotary lawn mower 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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This item is not returnable
$2.64 | 
27% OFF Phone Price : $3.64
In Stock
Lawn & Garden Equipment Hinge Screw 88652
#41

Rotary lawn mower 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
Rope Guide 132001
#4

Rotary lawn mower diagram

Rope guide

Part #132001

Replaced by #586122501

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Manufacturer substitution
This part replaces 132001. Substitute parts can look different from the original.
This item is not returnable
$15.59 | 
11% OFF Phone Price : $17.59
In Stock
Mulcher Door 165754
#10

Rotary lawn mower 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 | 
13% OFF Phone Price : $15.31
In Stock
Torsion Spring 152124
#28

Rotary lawn mower diagram

Torsion spring

Part #152124

Replaced by #532152124

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

Rotary lawn mower diagram

Selector

Part #170143

Replaced by #532087877

?
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
Handle Bolt 131959
#6

Rotary lawn mower diagram

Handle bolt

Part #131959

Replaced by #532191574

?
Manufacturer substitution
This part replaces 131959. Substitute parts can look different from the original.
$7.98 | 
11% OFF Phone Price : $8.98
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. …

Read more
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…

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Repair difficulty
Time required
 45 minutes or less

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