Gas Walk-Behind Mower

Model # 917378021 Official Craftsman 22" power-propelled side-discharge lawn mower

Here are the diagrams and repair parts for Official Craftsman 917378021 22" power-propelled side-discharge lawn mower, as well as links to manuals and error code tables, if available.

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Browse Parts for
917378021 Walk-Behind Mowers
Selctr Sprng 84888
#34

Main frame diagram

Selctr sprng

Part #84888

Replaced by #532401621

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Manufacturer substitution
This part replaces 84888. Substitute parts can look different from the original.
In Stock
Washer 86114
#36

Main frame diagram

Washer

Part #86114

Replaced by #532062335

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Manufacturer substitution
This part replaces 86114. Substitute parts can look different from the original.
In Stock
Washer 59289
#20

Main frame diagram

Washer

Part #59289

Replaced by #532059289

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Manufacturer substitution
This part replaces 59289. Substitute parts can look different from the original.
This item is not returnable
In Stock
Washer 74232
#34

Drive assembly diagram

Washer

Part #74232

Replaced by #819171912

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Manufacturer substitution
This part replaces 74232. Substitute parts can look different from the original.
This item is not returnable
In Stock
Lawn Mower Retainer Clip, 4-pack 55015
#27

Main frame diagram

Lawn mower retainer clip, 4-pack

Part #55015

Replaced by #582934801

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Manufacturer substitution
This part replaces 55015. Substitute parts can look different from the original.
This item is not returnable
In Stock
Bracket, Left 85664
#18

Main frame diagram

Bracket, left

Part #85664

Replaced by #532192983

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Manufacturer substitution
This part replaces 85664. Substitute parts can look different from the original.
In Stock
Blade 69334
#54

Main frame diagram

Blade

Part #69334

Replaced by #532406713

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Manufacturer substitution
This part replaces 69334. Substitute parts can look different from the original.

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$33.31
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Spacer 84920
#35

Main frame diagram

Spacer

Part #84920

Replaced by #532401629

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Manufacturer substitution
This part replaces 84920. Substitute parts can look different from the original.
This item is not returnable
$4.31
19% OFF Was : $5.31
In Stock
Hairpin 51793
#11

Main frame diagram

Hairpin

Part #51793

Replaced by #532051793

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Manufacturer substitution
This part replaces 51793. Substitute parts can look different from the original.
This item is not returnable
$8.64
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In Stock
Clip 85827
#10

Drive assembly diagram

Clip

Part #85827

Replaced by #582940401

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Manufacturer substitution
This part replaces 85827. Substitute parts can look different from the original.
This item is not returnable
In Stock

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

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

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

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.

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…

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

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…

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

How to replace a lawn mower starter rope

These step-by-step instructions show how to replace a broken starter pull rope on a walk-behind lawn mower.…

Repair difficulty
Time required
 30 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.

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.…

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

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