Craftsman
Gas Walk-Behind Mower

Model #917388521 Craftsman gas walk-behind lawn mower

Here are the diagrams and repair parts for Craftsman 917388521 gas walk-behind lawn mower, as well as links to manuals and error code tables, if available.

There are a couple of ways to find the part or diagram you need:

  • Click a diagram to see the parts shown on that diagram.
  • In the search box below, enter all or part of the part number or the part’s name.

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

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

For DIY troubleshooting advice and repair guides, visit our repair help section.

Owner’s manual

    Showing 10 of 211 parts

    Lawn Mower Lock Nut, 3/8-in#39

    Engine/housing/handle/bag/blade Diagram

    Lock nut

    Part #83923
    Replaced by #532409149
    ?
    Manufacturer substitution
    This part replaces 83923. Substitute parts can look different from the original.
    BEST SELLER
    This item is not returnable
    In Stock
    $3.59
    Lawn Mower Blade#56

    Engine/housing/handle/bag/blade 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
    $17.29
    Lawn Mower Rear Skirt#21

    Engine/housing/handle/bag/blade 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 Handle Knob#14

    Engine/housing/handle/bag/blade Diagram

    Handle knob

    Part #181254
    Replaced by #532185577
    ?
    Manufacturer substitution
    This part replaces 181254. Substitute parts can look different from the original.
    BEST SELLER
    This item is not returnable
    In Stock
    $2.69 | 
    10% OFF 
    MSRP: $3.00
    Lawn & Garden Equipment Engine Oil, SAE 30, 20-oz

    #(NI)

    All parts Diagram

    Lawn & garden equipment engine oil, 20-oz

    Part #33000
    Replaced by #40020
    ?
    Manufacturer substitution
    This part replaces 33000. Substitute parts can look different from the original.
    BEST SELLER

    Get free shipping with Automatic Reorder

    In Stock
    $13.79
    Lawn Mower Bolt#6

    Engine/housing/handle/bag/blade 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
    In Stock
    $2.89 | 
    17% OFF 
    MSRP: $3.50
    Lawn & Garden Equipment Hex Head Bolt, 3/8-24 x 1-1/8-in#53

    Engine/housing/handle/bag/blade 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
    Lawn Tractor Hex Lock Nut#51

    Engine/housing/handle/bag/blade Diagram

    Nut lck 5/16

    Part #73990500
    Replaced by #596040501
    ?
    Manufacturer substitution
    This part replaces 73990500. Substitute parts can look different from the original.
    BEST SELLER
    This item is not returnable
    In Stock
    $2.16
    Lawn & Garden Equipment Washer#55

    Engine/housing/handle/bag/blade Diagram

    Lawn & garden equipment washer

    Part #851074
    BEST SELLER
    This item is not returnable
    Back Order
    $2.79 | 
    7% OFF 
    MSRP: $3.00
    Lawn Mower Wheel, 8 x 2-in#37

    Engine/housing/handle/bag/blade Diagram

    Lawn mower wheel, 8 x 2-in

    Part #150339
    BEST SELLER
    In Stock
    $19.29 | 
    20% OFF 
    MSRP: $24.00

    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.

    October 1, 2019

    Types of walk-behind mower blades video

    By Sears PartsDirect staff

    Learn about the different kinds of mower blades and how to maintain them.