Craftsman
Gas Walk-Behind Mower

Model #917921332 Craftsman 20" rotary lawn mower

Here are the repair parts and diagrams for your Craftsman 917921332 20" rotary lawn mower. 

The diagram(s) below can help you find the right part.  If you’d like help, we invite you to call our customer service number at the top of the page, or click chat.

On this page, you can also find any manuals, installation guides and error code tables associated with this model.

For advice on diagnosing problems with appliances, lawn & garden equipment and other products, check out the videos, repair guides and articles in our DIY section.

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Showing 10 of 57 parts

Lawn & Garden Equipment Washer

#50

Replacement parts Diagram

Lawn & garden equipment washer

Part #69385
This item is not returnable

$2.91

In Stock

Pin

#45

Replacement parts Diagram

Pin

Part #STD560607

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

Screw

#9

Replacement parts Diagram

Screw

Part #59943

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

Lawn & Garden Equipment Flat Washer

#33

Replacement parts Diagram

Lawn & garden equipment flat washer

Part #539990692
?This is a manufacturer substitution. Part may differ in appearance but is a functional equivalent to prior parts including  61537
This part replaces 61537
This item is not returnable

$4.90

Back Order

Machine Screw, 8-pack

#38

Replacement parts Diagram

Machine screw, 8-pack

Part #STD511005
?This is a manufacturer substitution. Part may differ in appearance but is a functional equivalent to prior parts including  75136
This part replaces 75136
This item is not returnable

$2.21

Back Order

Bolt

#11

Replacement parts Diagram

Bolt

Part #STD523117

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

Screw

#46

Replacement parts Diagram

Screw

Part #STD512505

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

Lawn Tractor Decal

#23

Replacement parts Diagram

Lawn tractor decal

Part #539913010
?This is a manufacturer substitution. Part may differ in appearance but is a functional equivalent to prior parts including  78850
This part replaces 78850
This item is not returnable

$3.51

In Stock

Screw

#53

Replacement parts Diagram

Screw

Part #650837
?This is a manufacturer substitution. Part may differ in appearance but is a functional equivalent to prior parts including  650837
This part replaces 650837
This item is not returnable

$2.16

In Stock

Hinge Rod

#42

Replacement parts Diagram

Hinge rod

Part #73687
?This is a manufacturer substitution. Part may differ in appearance but is a functional equivalent to prior parts including  77636
This part replaces 77636

$14.07

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.

March 1, 2016
By Lyle Weischwill
How to replace a lawn mower drive cable

The drive cable engages the transmission to spin the drive wheels and move the mower across the grass. Replace the drive cable if it's broken or frozen up inside the sheath.

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.