Craftsman
Gas Walk-Behind Mower

Model #917378121 Craftsman 22" lawn mower

Here are the diagrams and repair parts for Craftsman 917378121 22" 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.

Save to my profile

    Showing 10 of 118 parts

    Nut

    #33

    Drive assembly Diagram

    Nut

    Part #63601

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

    E-Ring

    #30

    Drive assembly Diagram

    E-ring

    Part #STD581037

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

    Washer

    #20

    Main frame Diagram

    Washer

    Part #532059289
    ?
    Manufacturer substitution
    This part replaces 59289. Substitute parts can look different from the original.
    This part replaces 59289
    This item is not returnable
    $3.37

    In Stock

    Screw

    #6

    Main frame Diagram

    Screw

    Part #85436

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

    Lawn Mower Wheel

    #25

    Main frame Diagram

    Lawn mower wheel

    Part #33781
    ?
    Manufacturer substitution
    This part replaces 78890. Substitute parts can look different from the original.
    This part replaces 78890
    $9.87

    In Stock

    Pin

    #48

    Main frame Diagram

    Pin

    Part #STD560607

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

    Lawn & Garden Equipment Washer

    #34

    Drive assembly Diagram

    Lawn & garden equipment washer

    Part #19171912
    ?
    Manufacturer substitution
    This part replaces 74232. Substitute parts can look different from the original.
    This part replaces 74232
    This item is not returnable
    $3.92 | 
    7% OFF MSRP:$4.20

    In Stock

    Carriage Bolt

    #28

    Drive assembly Diagram

    Carriage bolt

    Part #STD532505

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

    Screw

    #25

    Drive assembly Diagram

    Screw

    Part #86314

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

    Lawn Tractor Decal

    #17

    Main frame Diagram

    Lawn tractor decal

    Part #539913010
    ?
    Manufacturer substitution
    This part replaces 85463. Substitute parts can look different from the original.
    This part replaces 85463
    This item is not returnable
    $3.51

    In Stock

    Symptoms for gas walk-behind mowers

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

    Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel
    Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade
    Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent
    Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up
    Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key
    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.

    How to replace a lawn mower flywheel key on an OHV engine

    The flywheel key couples the flywheel to the engine crankshaft. Replace the flywheel key if it's broken.

    Repair difficulty
    Time required
     60 minutes or less
    April 1, 2013
    By Lyle Weischwill
    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.

    Repair difficulty
    Time required
     15 minutes or less
    April 1, 2013
    By Lyle Weischwill
    How to replace a lawn mower safety switch

    The safety switch stops the engine when you release the lever on the handle. This repair guide explains how to replace it if it's not working correctly.

    Repair difficulty
    Time required
     30 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.