Craftsman
Gas Walk-Behind Mower

Model #917907885 Craftsman 20" rotary lawn mower

Here are the repair parts and diagrams for your Craftsman 917907885 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 67 parts

Lawn Mower Spacer

#59

Replacement parts Diagram

Lawn mower spacer

Part #82876
This item is not returnable

$2.39

In Stock

Spring

#24

Replacement parts Diagram

Spring

Part #77527
This item is not returnable

$4.02

In Stock

Lawn Mower Screw

#57

Replacement parts Diagram

Lawn mower screw

Part #82128
This item is not returnable

$2.49

In Stock

Washer

#61

Replacement parts Diagram

Washer

Part #59285
This item is not returnable

$2.16

In Stock

Lock Washer, 8-pack

#58

Replacement parts Diagram

Lock washer, 8-pack

Part #STD551137
?This is a manufacturer substitution. Part may differ in appearance but is a functional equivalent to prior parts including  STD551137
This part replaces STD551137
This item is not returnable

$2.75

Back Order

Screw

#11

Replacement parts Diagram

Screw

Part #78186

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

Bolt

#8

Replacement parts Diagram

Bolt

Part #STD523117

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

Screw

#26

Replacement parts Diagram

Screw

Part #STD512505

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

Lawn Tractor Decal

#18

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

#32

Replacement parts Diagram

Screw

Part #73845

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

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.