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Craftsman
Gas Walk-Behind Mower

Model # 917378644 Official Craftsman gas walk-behind lawn mower

Here are the diagrams and repair parts for Official Craftsman 917378644 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:

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  • 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”.

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For DIY troubleshooting advice and repair guides, visit our repair help section.

Owner’s manual
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Model diagram and schematic

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PART LIST
Showing 10 of 256 parts  |
Lawn Mower Lock Nut, 3/8-in (replaces 409149, 532409148)
#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
$4.64 | 
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In Stock
Lawn Mower Lock Nut, 3/8-in (replaces 409149, 532409148)
#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
$4.64 | 
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In Stock
Lawn Mower Lock Nut, 3/8-in (replaces 409149, 532409148)
#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
$4.64 | 
18% OFF Phone Price : $5.64
In Stock
Lawn Mower Wheel Dust Cover (replaces 189403, 532189403, 5321894-03)
#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
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$3.89 | 
20% OFF Phone Price : $4.89
Back Order
Lawn Mower Bolt (replaces 191574)
#5

Engine/housing/handle diagram

Handle bolt

Part #131959

Replaced by #532191574

?
Manufacturer substitution
This part replaces 131959. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$2.89 | 
26% OFF Phone Price : $3.89
In Stock
Engine Fuel Stabilizer, 12-oz (replaces 33500)

#NI05

All parts diagram

Fuel stabilizer

Part #33500

Replaced by #95012

?
Manufacturer substitution
This part replaces 33500. Substitute parts can look different from the original.
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This item is not returnable

Get free shipping with Automatic Reorder

$4.99 | 
17% OFF Phone Price : $5.99
In Stock
Lawn & Garden Equipment Washer (replaces 532851074, 5328510-74)
#48

Engine/housing/handle diagram

Lawn & garden equipment washer (replaces 532851074, 5328510-74)

Part #851074

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$2.79 | 
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Lawn Mower Height Adjuster Knob (replaces 701037, 701037X421)
Selector knob

Part #180912

Replaced by #532701037

?
Manufacturer substitution
This part replaces 180912. Substitute parts can look different from the original.
BEST SELLER
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$3.69 | 
21% OFF Phone Price : $4.69
In Stock
Lawn Mower Drive Pawl (replaces 532175098, 5321750-98)
#51

Wheels/tires/bag diagram

Lawn mower drive pawl (replaces 532175098, 5321750-98)

Part #175098

BEST SELLER
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$2.20 | 
31% OFF MSRP : $3.20
In Stock
Lawn Mower Throttle Control Assembly (replaces 5327006-44, 700644)
#29

Engine/housing/handle diagram

Lawn mower throttle control

Part #700644

Replaced by #532700644

?
Manufacturer substitution
This part replaces 700644. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$10.49 | 
16% OFF Phone Price : $12.49
In Stock

Symptoms for gas walk-behind mowers

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

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April 19, 2023

Why does my lawn mower run rough?

By Lyle Weischwill

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

Read more
April 19, 2023

Why does my lawn mower stall?

By Lyle Weischwill

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

Read more
April 19, 2023

Why does my lawn mower cut unevenly?

By Lyle Weischwill

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

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April 19, 2023

Why does my lawn mower vibrate a lot?

By Lyle Weischwill

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

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April 19, 2023

Why won't my lawn mower move?

By Lyle Weischwill

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

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April 19, 2023

Why won't my lawn mower start?

By Lyle Weischwill

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

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.

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How to replace a lawn mower spark plug
March 01, 2016
By Lyle Weischwill

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
March 01, 2016
By Lyle Weischwill

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
April 01, 2013
By Lyle Weischwill

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…

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Repair difficulty
Time required
 45 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.

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Tapping into a new feature in the Search Bar on Sears PartsDirect
August 11, 2022
By Lyle Weischwill

Tapping into a new feature in the Search Bar on Sears PartsDirect

Learn about a new feature added to the Search Bar on Sears PartsDirect…

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Introducing new technical repair content that we’re developing for the Sears Technical Institute
August 05, 2022
By Lyle Weischwill

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.…

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Top questions about Sears and Sears PartsDirect
June 29, 2022
By Lyle Weischwill

Top questions about Sears and Sears PartsDirect

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

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