Can’t find your part?   Contact us:
+1-309-603-4777
Sears Parts Direct
Orders

  • Keep track of the models you own in your profile

    Sign in or Register to view or add models

Schedule a repair
Craftsman
Gas Walk-Behind Mower

Model # 917378403 Official Craftsman gas walk-behind lawn mower

Here are the diagrams and repair parts for Official Craftsman 917378403 gas walk-behind 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.

Owner’s manual
  View engine

Model diagram and schematic

SEARCH WITHIN THIS MODEL

?

This is the number corresponding to the part on the diagram / schematic

Search
ALL PARTS
Showing 10 of 281 parts  |
Pipe Fitting 132010
#31

Wheels/tires/bag diagram

Pipe fitting

Part #132010

Replaced by #532409149

?
Manufacturer substitution
This part replaces 132010. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$5.31 | 
16% OFF Phone Price : $6.31
In Stock
Lock Nut 83923
#26

Engine/housing/handle diagram

Lock nut

Part #83923

Replaced by #532409149

?
Manufacturer substitution
This part replaces 83923. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$5.31 | 
16% OFF Phone Price : $6.31
In Stock
Hex Flange Lock Nut 145212
#9

Wheels/tires/bag diagram

Hex flange lock nut

Part #145212

Replaced by #532409149

?
Manufacturer substitution
This part replaces 145212. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$5.31 | 
16% OFF Phone Price : $6.31
In Stock
Handle Knob 181254
#6

Engine/housing/handle diagram

Handle knob

Part #181254

Replaced by #532185577

?
Manufacturer substitution
This part replaces 181254. Substitute parts can look different from the original.
BEST SELLER
$10.64 | 
16% OFF Phone Price : $12.64
In Stock
Lawn Mower Drive Wheel, 8 X 2-in (replaces 180767, 532180775, 5321807-75) 180775
#11

Wheels/tires/bag diagram

Lawn mower drive wheel, 8 x 2-in (replaces 180767, 532180775, 5321807-75)

Part #180775

BEST SELLER
$23.63 | 
20% OFF Phone Price : $29.63
In Stock
Dust Cover 180504
#14

Wheels/tires/bag diagram

Dust cover

Part #180504

Replaced by #581840401

?
Manufacturer substitution
This part replaces 180504. Substitute parts can look different from the original.
BEST SELLER
$7.98 | 
11% OFF Phone Price : $8.98
In Stock
Spring 188291
#20

Wheels/tires/bag diagram

Spring

Part #188291

Replaced by #532188291

?
Manufacturer substitution
This part replaces 188291. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$5.31 | 
16% OFF Phone Price : $6.31
In Stock
Return Spring 182226
#40

Wheels/tires/bag diagram

Return spring

Part #182226

Replaced by #532406558

?
Manufacturer substitution
This part replaces 182226. Substitute parts can look different from the original.
BEST SELLER
$9.31 | 
10% OFF Phone Price : $10.31
In Stock
Molded Ignition Key 180331
#83

Engine/housing/handle diagram

Molded ignition key

Part #180331

Replaced by #532180331

?
Manufacturer substitution
This part replaces 180331. Substitute parts can look different from the original.
BEST SELLER
$7.98 | 
11% OFF Phone Price : $8.98
In Stock
Cable.mzr.60 182755
#4

Engine/housing/handle diagram

Cable.mzr.60

Part #182755

Replaced by #532183567

?
Manufacturer substitution
This part replaces 182755. Substitute parts can look different from the original.
$19.98 | 
9% OFF Phone Price : $21.98
In Stock

Symptoms for gas walk-behind mowers

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

View all

Why does my lawn mower run rough?

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

Read more

Why does my lawn mower cut unevenly?

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

Read more

Why does my lawn mower vibrate a lot?

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

Read more

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…

Read more

Why does my lawn mower stall?

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

Read more

Why won't my lawn mower move?

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

Read more

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.

View all
How to replace a lawn mower spark plug

How to replace a lawn mower spark plug

Take a few minutes to replace the spark plug during your lawn mower's annual tune-up or if the spark plug is burnt or cr…

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower blade

How to replace a lawn mower blade

Check your lawn mower blade regularly and replaced it if it's bent or damaged. …

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower flywheel key on a flathead engine

How to replace a lawn mower flywheel key on a flathead engine

When you hit a hard object with your mower, the flywheel can shear to protect more expensive components. Learn how to re…

Read more
Repair difficulty
Time required
 45 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.

View all
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.…

Read more
Introducing new technical repair content that we’re developing for the Sears Technical Institute

Introducing new technical repair content that we’re developing for the Sears Technical Institute

Learn about Sears Technical Institute and the advanced technical content being developed for aspiring appliance techs.…

Read more
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.…

Read more

Parts & More

Vacuum Cleaner
Vacuum Cleaner Parts