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Craftsman
Gas Walk-Behind Mower

Model # 917378421 Official Craftsman gas walk-behind lawn mower

Here are the diagrams and repair parts for Official Craftsman 917378421 gas walk-behind lawn mower, as well as links to manuals and error code tables, if available.

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Owner’s manual
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Model diagram and schematic

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ALL PARTS
Showing 10 of 252 parts  |
Belt, 21-in 175064
#47

Rotary lawn mower 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 | 
21% OFF Phone Price : $28.13
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Handle Knob 136376
#6

Rotary lawn mower 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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$10.64 | 
16% OFF Phone Price : $12.64
In Stock
Lawn Mower Height Adjuster Knob 701037
#18

Wheels and tires 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.
BEST SELLER
This item is not returnable
$6.64 | 
13% OFF Phone Price : $7.64
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Nut 132004
#18

Rotary lawn mower diagram

Nut

Part #132004

Replaced by #582478602

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Manufacturer substitution
This part replaces 132004. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$2.64 | 
27% OFF Phone Price : $3.64
In Stock
Rope Guide 153638
#19

Rotary lawn mower diagram

Rope guide

Part #153638

Replaced by #586122501

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Manufacturer substitution
This part replaces 153638. Substitute parts can look different from the original.
This item is not returnable
$15.59 | 
11% OFF Phone Price : $17.59
In Stock
Nut 63124
#33

Rotary lawn mower diagram

Nut

Part #63124

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

Weed Eater Lawn & Garden Equipment Screw, 14-20 X 5/8-in 17060410
#13

Rotary lawn mower diagram

Weed eater lawn & garden equipment screw, 14-20 x 5/8-in

Part #17060410

Replaced by #817060410

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Manufacturer substitution
This part replaces 17060410. Substitute parts can look different from the original.
This item is not returnable
$6.83
In Stock
Lawn Mower Ground Drive Belt, 3/8 X 32-1/2-in (replaces 532175436) 175436
#5

Wheels and tires diagram

Lawn mower ground drive belt, 3/8 x 32-1/2-in (replaces 532175436)

Part #175436

Replaced by #532175436

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Manufacturer substitution
This part replaces 175436. Substitute parts can look different from the original.

Get free shipping with Automatic Reorder

$26.64
In Stock
Lawn & Garden Equipment Pan Head Screw 158755
#4

Wheels and tires diagram

Lawn & garden equipment pan head screw

Part #158755

This item is not returnable
$4.19
In Stock
Lawn & Garden Equipment Washer (replaces 532851074, 5328510-74) 851074
#48

Rotary lawn mower diagram

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

Part #851074

Replaced by #532851074

?
Manufacturer substitution
This part replaces 851074. Substitute parts can look different from the original.
This item is not returnable
$6.83
In Stock

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 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 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 cut unevenly?

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

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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 does my lawn mower run rough?

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

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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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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 rebuild a lawn mower carburetor

How to rebuild a lawn mower carburetor

The carburetor mixes air with fuel to drive the piston. Rebuild the carburetor if it's clogged or leaks.…

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Repair difficulty
Time required
 60 minutes or less
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 wheel

How to replace a lawn mower wheel

Learn how replace a damaged wheel on a walk-behind lawn mower—it's a quick, easy fix.…

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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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