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Craftsman
Gas Walk-Behind Mower

Model # 917251021 Official Craftsman 42" rotary lawn mower

Here are the diagrams and repair parts for Official Craftsman 917251021 42" rotary lawn mower, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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Showing 10 of 111 parts  |
1641-zerk 6855M
#12

Housing assembly diagram

1641-zerk

Part #6855M

Replaced by #532183226

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Manufacturer substitution
This part replaces 6855M. Substitute parts can look different from the original.
This item is not returnable
$6.64
| 
13% OFF Phone Price : $7.64
In Stock
Gripco Nut 1685H
#3

Housing assembly diagram

Gripco nut

Part #1685H

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

Cotter Pin 187988
#12

Hanger assembly diagram

Cotter pin

Part #187988

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

Hanger Comp 606A249
#30

Hanger assembly diagram

Hanger comp

Part #606A249

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

Lift Arm 634A229
#9

Hanger assembly diagram

Lift arm

Part #634A229

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

Bolt Cover 606A351
#6

Housing assembly diagram

Bolt cover

Part #606A351

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

Bushing 1689E
#37

Hanger assembly diagram

Bushing

Part #1689E

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

Nut 120375
#47

Housing assembly diagram

Nut

Part #120375

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

Bolt 181652
#52J

Housing assembly diagram

Bolt

Part #181652

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

Bolt 456754
#52A

Housing assembly diagram

Bolt

Part #456754

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.

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Why does my lawn mower vibrate a lot?

Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up...

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Why does my lawn mower cut unevenly?

Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade...

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Why does my lawn mower run rough?

Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key...

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Why won't my lawn mower move?

Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel...

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Why won't my lawn mower start?

Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba...

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Why does my lawn mower stall?

Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent...

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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.

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How to replace a lawn mower recoil starter on an OHV engine

How to replace a lawn mower recoil starter on an OHV engine

Replace the recoil starter if it doesn't move when you pull the starter rope....

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Repair difficulty
Time required
15 minutes or less
How to replace a lawn mower transmission

How to replace a lawn mower transmission

Learn how to replace the transmission on your lawn mower if it's locked up or won't drive the wheels....

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Repair difficulty
Time required
60 minutes or less
How to replace a lawn mower carburetor

How to replace a lawn mower carburetor

The carburetor mixes air with fuel to drive the piston. Replace the carburetor if it's clogged or damaged....

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Repair difficulty
Time required
15 minutes or less

Effective articles & videos to help repair your walk-behind mowers

Use the advice and tips in these articles and videos to get the most out of your walk-behind lawn mower.

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How to enjoy all the online benefits we offer on our Sears PartsDirect website

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier....

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Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect....

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Types of walk-behind mower blades video

Types of walk-behind mower blades video

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

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