Poulan
Gas Walk-Behind Mower

Model # PO4QN20SC Official Poulan rotary lawn mower

Here are the diagrams and repair parts for Official Poulan PO4QN20SC 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 50 parts  |

Lawn Mower Blade Adapter 850977
#53

Engine/housing/handle/wheels diagram

Lawn mower blade adapter

Part #850977

Replaced by #581547901

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Manufacturer substitution
This part replaces 850977. Substitute parts can look different from the original.
BEST SELLER
$19.36
9% OFF Phone Price : $21.36
In Stock
Nut 132004
#57

Engine/housing/handle/wheels 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
#2

Engine/housing/handle/wheels 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
Walk-behind Lawn Mower Selector Knob 87877
#32

Engine/housing/handle/wheels diagram

Walk-behind lawn mower selector knob

Part #87877

Replaced by #532087877

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Manufacturer substitution
This part replaces 87877. Substitute parts can look different from the original.
This item is not returnable
$5.31
16% OFF Phone Price : $6.31
In Stock
Spring 700331X004
#31

Engine/housing/handle/wheels diagram

Spring

Part #700331X004

Replaced by #532401621

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Manufacturer substitution
This part replaces 700331X004. Substitute parts can look different from the original.
In Stock
Lawn Mower Cable Bracket 86899X004
#8

Engine/housing/handle/wheels diagram

Lawn mower cable bracket

Part #86899X004

Replaced by #532430034

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Manufacturer substitution
This part replaces 86899X004. Substitute parts can look different from the original.
In Stock
Tapping Screw 750097
#9

Engine/housing/handle/wheels diagram

Tapping screw

Part #750097

Replaced by #817021008

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Manufacturer substitution
This part replaces 750097. Substitute parts can look different from the original.
This item is not returnable
In Stock
Handle Bolt 131959
#7

Engine/housing/handle/wheels 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.
$7.98
11% OFF Phone Price : $8.98
In Stock
Screw, 5/16-in 149741
#41

Engine/housing/handle/wheels diagram

Screw, 5/16-in

Part #149741

Replaced by #532171877

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Manufacturer substitution
This part replaces 149741. Substitute parts can look different from the original.
In Stock
Lawn & Garden Equipment Pop Rivet 128415
#16

Engine/housing/handle/wheels diagram

Lawn & garden equipment pop rivet

Part #128415

Replaced by #532128415

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Manufacturer substitution
This part replaces 128415. Substitute parts can look different from the original.
This item is not returnable
In Stock

Symptoms for gas walk-behind mowers

Choose a symptom to see related walk-behind mower repairs.

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

Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade…

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

Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba…

Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent…

Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel…

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.

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…

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. …

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…

Repair difficulty
Time required
 45 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

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Introducing new technical repair content that we’re developing for the Sears Technical Institute

Introducing new technical repair content that we’re developing for the Sears Technical Institute

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