Poulan
Gas Walk-Behind Mower

Model #PR55N21CB Official Poulan rotary lawn mower

Here are the diagrams and repair parts for 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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For DIY troubleshooting advice and repair guides, visit our repair help section.

    Showing 10 of 60 parts

    Lawn Mower Rear Skirt#21

    Rotary lawn mower Diagram

    Skirt

    Part #165858
    Replaced by #413160
    ?
    Manufacturer substitution
    This part replaces 165858. Substitute parts can look different from the original.
    BEST SELLER
    In Stock
    $7.79 | 
    35% OFF 
    MSRP: $12.00
    Lawn Mower Blade#56

    Rotary lawn mower Diagram

    Belt, 21-in

    Part #175064
    Replaced by #532406712
    ?
    Manufacturer substitution
    This part replaces 175064. Substitute parts can look different from the original.
    BEST SELLER
    In Stock
    $15.09 | 
    12% OFF 
    Phone Price: $17.09
    Lawn Mower Bolt#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.
    BEST SELLER
    This item is not returnable
    Back Order
    $2.89 | 
    26% OFF 
    Phone Price: $3.89
    Lawn & Garden Equipment Hex Head Bolt, 3/8-24 x 1-1/8-in#53

    Rotary lawn mower Diagram

    Lawn & garden equipment screw

    Part #851084
    Replaced by #532435345
    ?
    Manufacturer substitution
    This part replaces 851084. Substitute parts can look different from the original.
    BEST SELLER
    This item is not returnable
    In Stock
    $3.49 | 
    22% OFF 
    Phone Price: $4.49
    Lawn & Garden Equipment Washer#55

    Rotary lawn mower Diagram

    Lawn & garden equipment washer

    Part #851074
    BEST SELLER
    This item is not returnable
    In Stock
    $2.79 | 
    26% OFF 
    Phone Price: $3.79
    Lawn Mower Blade Adapter#57

    Rotary lawn mower Diagram

    Lawn mower blade adapter

    Part #851514
    Replaced by #581547901
    ?
    Manufacturer substitution
    This part replaces 851514. Substitute parts can look different from the original.
    BEST SELLER
    In Stock
    $14.39 | 
    12% OFF 
    Phone Price: $16.39
    Lawn Mower Deflector Shield#31

    Rotary lawn mower Diagram

    Discharge guard

    Part #165760
    Replaced by #589482402
    ?
    Manufacturer substitution
    This part replaces 165760. Substitute parts can look different from the original.
    BEST SELLER
    This item is not returnable
    Back Order
    $5.69 | 
    15% OFF 
    Phone Price: $6.69
    Lawn Mower Zone Control Cable#11

    Rotary lawn mower Diagram

    Lawn mower zone control cable

    Part #130861
    BEST SELLER
    In Stock
    $14.39 | 
    12% OFF 
    Phone Price: $16.39
    Lawn Mower Screw#41

    Rotary lawn mower Diagram

    Lawn & garden equipment hinge screw

    Part #88652
    Replaced by #532088652
    ?
    Manufacturer substitution
    This part replaces 88652. Substitute parts can look different from the original.
    BEST SELLER
    This item is not returnable
    In Stock
    $4.19 | 
    19% OFF 
    Phone Price: $5.19
    Lawn Mower Mulching Door#10

    Rotary lawn mower Diagram

    Mulcher door

    Part #165754
    Replaced by #532165754
    ?
    Manufacturer substitution
    This part replaces 165754. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $8.99 | 
    10% OFF 
    Phone Price: $9.99

    Symptoms for gas walk-behind mowers

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

    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: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent
    Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key
    Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel
    Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, bad ignition coil

    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.

    March 1, 2016
    By Lyle Weischwill
    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 ignition coil on an OHV engine

    Replace the ignition coil if it isn't sending electric current to the spark plug when you pull the recoil starter rope.

    Repair difficulty
    Time required
     30 minutes or less
    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 replace this tiny but essential part.

    Repair difficulty
    Time required
     45 minutes or less

    Articles and videos common to all 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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    Introducing new technical repair content that we’re developing for the Sears Technical Institute

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