Craftsman
Lawn & Garden Engine

Model # 143105040 Official Craftsman 4-cycle gas engine

Here are the diagrams and repair parts for Official Craftsman 143105040 4-cycle gas engine, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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Showing 10 of 237 parts  |

Breather Element Air Filter 28424
#55

Basic engine diagram

Breather element air filter

Part #28424

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

/carb Float 27105
#14

Carburetor no. 29993 diagram

/carb float

Part #27105

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

Groove Pin 29783
#12

Basic engine diagram

Groove pin

Part #29783

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

Bolt 21718
#18

Basic engine diagram

Bolt

Part #21718

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

Washer 28563
#78

Basic engine diagram

Washer

Part #28563

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

Spring 27114
#8

Carburetor no. 29993 diagram

Spring

Part #27114

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

Washer 8345
#99

Basic engine diagram

Washer

Part #8345

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

Clip 27793
#114

Basic engine diagram

Clip

Part #27793

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

Gear Assembly 30117
#111

Basic engine diagram

Gear assembly

Part #30117

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

Lifter 27893
#21

Basic engine diagram

Lifter

Part #27893

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

Symptoms for gas walk-behind mowers

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

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

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

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

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

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 blade

How to replace a lawn mower blade

Check your lawn mower blade regularly and replaced it if it's bent or damaged. …

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…

Repair difficulty
Time required
 45 minutes or less

Effective articles & videos to help repair your lawn & garden engines

Use the advice and tips in these articles and videos to get the most out of your walk-behind lawn mower.

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.…

What are the main components of a lawn mower?

What are the main components of a lawn mower?

Learn about the main parts of a lawn mower and when to replace parts.…