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Cub Cadet
Gas Walk-Behind Mower

Model # 12A-379I100 Official Cub Cadet gas lawn mower

Here are the diagrams and repair parts for Official Cub Cadet 12A-379I100 gas 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:

  • Click a diagram to see the parts shown on that diagram.
  • 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

Model diagram and schematic

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ALL PARTS
Showing 10 of 113 parts  |
Yard Machines Lawn & Garden Equipment Wing Nut (replaces 01002925, 920-0279) 720-0279
#5

Deck/bag/handle/wheels/engine diagram

Yard machines lawn & garden equipment wing nut (replaces 01002925, 920-0279)

Part #720-0279

This item is not returnable
$6.87
| 
13% OFF Phone Price : $7.87
In Stock
Sears Lawn & Garden Equipment Plastic Plug 721-0325
#25

Transmission diagram

Sears lawn & garden equipment plastic plug

Part #721-0325

This item is not returnable
$6.75
| 
13% OFF Phone Price : $7.75
In Stock
Yard Machines Lawn & Garden Equipment Guide Bolt 710-1205
#13

Deck/bag/handle/wheels/engine diagram

Yard machines lawn & garden equipment guide bolt

Part #710-1205

This item is not returnable
$5.01
| 
17% OFF Phone Price : $6.01
In Stock
Sears Lawn & Garden Equipment Cotter Pin (replaces 914-0474) 714-0474
#92

Deck/bag/handle/wheels/engine diagram

Sears lawn & garden equipment cotter pin (replaces 914-0474)

Part #714-0474

$8.09
In Stock
Lawn & Garden Equipment Hex Bolt (replaces 01000943, 910-1257) 710-1257
#75

Deck/bag/handle/wheels/engine diagram

Lawn & garden equipment hex bolt (replaces 01000943, 910-1257)

Part #710-1257

This item is not returnable
$9.85
| 
9% OFF Phone Price : $10.85
In Stock
Toro Lawn & Garden Equipment Hex Screw 710-1026
#129

Deck/bag/handle/wheels/engine diagram

Toro lawn & garden equipment hex screw

Part #710-1026

This item is not returnable
$10.46
| 
16% OFF Phone Price : $12.46
In Stock
Ryobi Lawn Tractor Screw 710-0604A
#85

Deck/bag/handle/wheels/engine diagram

Ryobi lawn tractor screw

Part #710-0604A

This item is not returnable
$5.62
| 
15% OFF Phone Price : $6.62
In Stock
Yard Machines Lawn & Garden Equipment Washer (replaces 936-0105) 736-0105
#6

Front axle assembly/height adjuster diagram

Yard machines lawn & garden equipment washer (replaces 936-0105)

Part #736-0105

This item is not returnable
$6.29
In Stock
Yard-man Lawn & Garden Equipment Self-tapping Screw 710-0351
#25

Deck/bag/handle/wheels/engine diagram

Yard-man lawn & garden equipment self-tapping screw

Part #710-0351

This item is not returnable
$7.71
In Stock
Lawn & Garden Equipment Screw 710-0924
#124

Deck/bag/handle/wheels/engine diagram

Lawn & garden equipment screw

Part #710-0924

This item is not returnable
$6.37
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 vibrate a lot?

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

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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 does my lawn mower run rough?

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

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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 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 stall?

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

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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 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 transmission

How to replace a lawn mower transmission

Learn how to replace the transmission on your lawn mower if it's locked up or won't drive the wheels....

Read more
Repair difficulty
Time required
60 minutes or less
How to replace a lawn mower carburetor

How to replace a lawn mower carburetor

The carburetor mixes air with fuel to drive the piston. Replace the carburetor if it's clogged or damaged....

Read more
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....

Read more