Craftsman
Lawn & Garden Engine

Model # 143105051 Official Craftsman 4-cycle engine

Here are the diagrams and repair parts for Official Craftsman 143105051 4-cycle engine, 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”.

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

For DIY troubleshooting advice and repair guides, visit our repair help section.

Model diagram and schematic

SEARCH WITHIN THIS MODEL

?

This is the number corresponding to the part on the diagram / schematic

Search
ALL PARTS
Showing 10 of 213 parts  |

Gasket 27110
#20

Carburetor no. 30108(lmg-155) diagram

Gasket

Part #27110

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

Gasket 27930
#91

Basic engine diagram

Gasket

Part #27930

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

Tube 27627
#57

Basic engine diagram

Tube

Part #27627

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

Pipe Plug 27642
#37

Basic engine diagram

Pipe plug

Part #27642

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

Spool 30116
#113

Basic engine diagram

Spool

Part #30116

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

Spring 27113
#5

Carburetor no. 30108(lmg-155) diagram

Spring

Part #27113

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

Pin 20810
#10

Basic engine diagram

Pin

Part #20810

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

/brether Asy 28423
#54

Basic engine diagram

/brether asy

Part #28423

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

Ex Valve 27878
#6

Basic engine diagram

Ex valve

Part #27878

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.…