Craftsman
Lawn & Garden Engine

Model # 143640020B Official Craftsman carburetor

Here are the diagrams and repair parts for Official Craftsman 143640020B carburetor, 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 21 parts  |

Lawn & Garden Equipment Engine Spring 632545
#38

Carburetor 640020b diagram

Lawn & garden equipment engine spring

Part #632545

This item is not returnable
In Stock
Tecumseh Lawn & Garden Equipment Engine Carburetor Main Jet 640021
#40

Carburetor 640020b diagram

Tecumseh lawn & garden equipment engine carburetor main jet

Part #640021

This item is not returnable
In Stock
Tecumseh Lawn & Garden Equipment Engine Nozzle Tube 640022
#34

Carburetor 640020b diagram

Tecumseh lawn & garden equipment engine nozzle tube

Part #640022

This item is not returnable
In Stock
Lawn & Garden Equipment Engine Carburetor Float 632543
#28

Carburetor 640020b diagram

Lawn & garden equipment engine carburetor float

Part #632543

In Stock
Tecumseh Lawn & Garden Equipment Engine Carburetor Rebuild Kit (replaces 730637) 730637A
#(NI)

Carburetor 640020b diagram

Tecumseh lawn & garden equipment engine carburetor rebuild kit (replaces 730637)

Part #730637A

$38.27
14% OFF Phone Price : $44.27
In Stock
Tecumseh Retainer 632549
#39

Carburetor 640020b diagram

Tecumseh retainer

Part #632549

This item is not returnable
In Stock
Lawn & Garden Equipment Engine Carburetor Valve Seat Gasket 632709
#30

Carburetor 640020b diagram

Lawn & garden equipment engine carburetor valve seat gasket

Part #632709

This item is not returnable
In Stock
Walton Lawn & Garden Equipment Engine Screw 650506
#7

Carburetor 640020b diagram

Walton lawn & garden equipment engine screw

Part #650506

This item is not returnable
In Stock
Tecumseh Shutter 632541
#6

Carburetor 640020b diagram

Tecumseh shutter

Part #632541

This item is not returnable
In Stock
Welch Plug 632554
#47

Carburetor 640020b diagram

Welch plug

Part #632554

This item is not returnable
In Stock

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.…