Gas Walk-Behind Mower

Model # 9178372 Official Craftsman lawn mower

Here are the diagrams and repair parts for Official Craftsman 9178372 lawn mower, as well as links to manuals and error code tables, if available.

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9178372 Walk-Behind Mowers
Ret Spring 4939M
#54

Mower housing diagram

Ret spring

Part #4939M

Replaced by #532003146

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Manufacturer substitution
This part replaces 4939M. Substitute parts can look different from the original.
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$4.31
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E-ring 98000071
E-ring

Part #98000071

Replaced by #812000029

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Manufacturer substitution
This part replaces 98000071. Substitute parts can look different from the original.
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$4.51
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Hub Bolt 1304H
#65

Seat and drive assembly diagram

Hub bolt

Part #1304H

Replaced by #596218701

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Manufacturer substitution
This part replaces 1304H. Substitute parts can look different from the original.
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$4.37
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Washer 19252016
Washer

Part #19252016

Replaced by #532121749

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Manufacturer substitution
This part replaces 19252016. Substitute parts can look different from the original.
This item is not returnable
$4.31
19% OFF Phone Price : $5.31
In Stock
Ground Strap 5114H
#25

(electric starter) diagram

Ground strap

Part #5114H

Replaced by #532004207

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Manufacturer substitution
This part replaces 5114H. Substitute parts can look different from the original.
This item is not returnable
$7.20
12% OFF Phone Price : $8.20
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Seal 788009
#60

Transaxle diagram

Seal

Part #788009

Replaced by #788009

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Manufacturer substitution
This part replaces 788009. Substitute parts can look different from the original.
In Stock
Screw 792007
#49

Transaxle diagram

Screw

Part #792007

Replaced by #792007

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Manufacturer substitution
This part replaces 792007. Substitute parts can look different from the original.
This item is not returnable
In Stock
Shifter Stop 784074
#29

Transaxle diagram

Shifter stop

Part #784074

Replaced by #784074

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Manufacturer substitution
This part replaces 784074. Substitute parts can look different from the original.
In Stock
Coupling 786028
Coupling

Part #786028

Replaced by #786028

?
Manufacturer substitution
This part replaces 786028. Substitute parts can look different from the original.
This item is not returnable
$21.89
22% OFF Phone Price : $27.89
In Stock
Idler 778016
#66

Transaxle diagram

Idler

Part #778016

Replaced by #778016

?
Manufacturer substitution
This part replaces 778016. Substitute parts can look different from the original.
In Stock

Symptoms for gas walk-behind mowers

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

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

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

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

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

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

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

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 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.…

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.…

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.…

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.

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.…

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.…

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.…