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Craftsman
Gas Walk-Behind Mower

Model # 917378451 Official Craftsman gas walk-behind lawn mower

Here are the diagrams and repair parts for Official Craftsman 917378451 gas walk-behind lawn mower, as well as links to manuals and error code tables, if available.

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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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Owner’s manual
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Model diagram and schematic

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ALL PARTS
Showing 10 of 249 parts  |
Pipe Fitting 132010
#31

Wheels/tires/bag diagram

Pipe fitting

Part #132010

Replaced by #532409149

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Manufacturer substitution
This part replaces 132010. Substitute parts can look different from the original.
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Lock Nut 83923
#26

Engine/handle/housing diagram

Lock nut

Part #83923

Replaced by #532409149

?
Manufacturer substitution
This part replaces 83923. Substitute parts can look different from the original.
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Hex Flange Lock Nut 145212
#9

Wheels/tires/bag diagram

Hex flange lock nut

Part #145212

Replaced by #532409149

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Manufacturer substitution
This part replaces 145212. Substitute parts can look different from the original.
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Belt, 21-in 175064
#47

Engine/handle/housing diagram

Belt, 21-in

Part #175064

Replaced by #532406712

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Manufacturer substitution
This part replaces 175064. Substitute parts can look different from the original.
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$22.13 | 
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Handle Knob 136376
#6

Engine/handle/housing diagram

Handle knob

Part #136376

Replaced by #532185577

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Manufacturer substitution
This part replaces 136376. Substitute parts can look different from the original.
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Handle Bolt 131959
#5

Engine/handle/housing diagram

Handle bolt

Part #131959

Replaced by #532191574

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Manufacturer substitution
This part replaces 131959. Substitute parts can look different from the original.
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Lawn Mower Height Adjuster Knob 701037
#18

Wheels/tires/bag diagram

Lawn mower height adjuster knob

Part #701037

Replaced by #532701037

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Manufacturer substitution
This part replaces 701037. Substitute parts can look different from the original.
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Lawn Mower Blade Adapter 851514
#46

Engine/handle/housing diagram

Lawn mower blade adapter

Part #851514

Replaced by #581547901

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Manufacturer substitution
This part replaces 851514. Substitute parts can look different from the original.
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Nut 132004
Nut

Part #132004

Replaced by #582478602

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Manufacturer substitution
This part replaces 132004. Substitute parts can look different from the original.
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Tune-up Kit 5106A

#NI

All parts diagram

Tune-up kit

Part #5106A

Replaced by #5140B

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Manufacturer substitution
This part replaces 5106A. Substitute parts can look different from the original.
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$20.80 | 
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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 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…

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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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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

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.

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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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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.…

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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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