Craftsman
Gas Walk-Behind Mower

Model #917251050 Craftsman 42" rotary lawn mower

Here are the diagrams and repair parts for Craftsman 917251050 42" rotary 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 125 parts

|

Lawn Tractor Grease Fitting

#12

Mandrel assembly Diagram

Lawn tractor grease fitting

Part #6855M
This item is not returnable
$2.60 | 
11% OFF MSRP:$2.92

In Stock

Lock Washer, 8-pack

#44

Lift assembly Diagram

Lock washer, 8-pack

Part #STD551143
?
Manufacturer substitution
This part replaces 131100. Substitute parts can look different from the original.
This part replaces 131100
This item is not returnable
$2.31

Back Order

Lawn Tractor Deck Lift Lever Torsion Spring

#27

Lift assembly Diagram

Lawn tractor deck lift lever torsion spring

Part #532002876
?
Manufacturer substitution
This part replaces 2876H. Substitute parts can look different from the original.
This part replaces 2876H
This item is not returnable
$4.68

In Stock

Bolt

#34

Lift assembly Diagram

Bolt

Part #122040

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

Roll Pin, 5-pack

#5

Lift assembly Diagram

Roll pin, 5-pack

Part #STD571810
?
Manufacturer substitution
This part replaces 1572H. Substitute parts can look different from the original.
This part replaces 1572H
This item is not returnable
$2.10

In Stock

Flat Washer, 8-pack

#2

Lift assembly Diagram

Flat washer, 8-pack

Part #STD551050
?
Manufacturer substitution
This part replaces 19171710. Substitute parts can look different from the original.
This part replaces 19171710
This item is not returnable
$2.15

In Stock

Screw

#50

Lift assembly Diagram

Screw

Part #120571

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

Timken Cup

#17

Mandrel assembly Diagram

Timken cup

Part #1553H

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

Hex Nut, 8-pack

#47

Mandrel assembly Diagram

Hex nut, 8-pack

Part #STD541025
?
Manufacturer substitution
This part replaces 120375. Substitute parts can look different from the original.
This part replaces 120375
This item is not returnable
$2.36

Back Order

Woodruff Key

#19

Mandrel assembly Diagram

Woodruff key

Part #8330H

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

Showing 10 of 125 parts

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.