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Craftsman
Lawn & Garden Engine

Model # 143639012 Official Craftsman 4-cycle engine

Here are the diagrams and repair parts for Official Craftsman 143639012 4-cycle 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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ALL PARTS
Showing 10 of 185 parts  |
Starter Rope 30971
#13

Rewind starter diagram

Starter rope

Part #30971

Replaced by #590535

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Manufacturer substitution
This part replaces 30971. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$2.49 | 
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In Stock
Gasket 27110
#20

Carburetor diagram

Gasket

Part #27110

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

Screw 30564
#32

Basic engine diagram

Screw

Part #30564

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

/carb Float 27105
#14

Carburetor diagram

/carb float

Part #27105

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

Washer 30590A
#52

Basic engine diagram

Washer

Part #30590A

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

Lawn & Garden Equipment Engine Recoil Starter Pawl 590148
#5

Rewind starter diagram

Lawn & garden equipment engine recoil starter pawl

Part #590148

This item is not returnable
$3.66
In Stock
Tractor Accessories Spring 28289
#12

Rewind starter diagram

Tractor accessories spring

Part #28289

$14.91
In Stock
Lawn & Garden Equipment Washer 32024
#2

Rewind starter diagram

Lawn & garden equipment washer

Part #32024

This item is not returnable
$2.16
In Stock
Handle 590387
#14

Rewind starter diagram

Handle

Part #590387

This item is not returnable
$2.99
In Stock
Pin 20810
#10

Basic engine diagram

Pin

Part #20810

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

Symptoms for gas walk-behind mowers

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

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

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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 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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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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Repair guides for gas walk-behind mowers

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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…

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Repair difficulty
Time required
 15 minutes or less
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Check your lawn mower blade regularly and replaced it if it's bent or damaged. …

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Repair difficulty
Time required
 15 minutes or less
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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…

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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.

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What are the main components of a lawn mower?

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