Craftsman
Lawn & Garden Engine

Model # 143975508 Official Craftsman engine

Here are the diagrams and repair parts for Official Craftsman 143975508 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 133 parts  |

Troybilt Lawn & Garden Equipment Engine Air Filter 35066
#245

Engine 143.975508 (71/143) diagram

Troybilt lawn & garden equipment engine air filter

Part #35066

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Lawn Mower O-ring 631028
#29

Carburetor 640026 (71/143) diagram

Lawn mower o-ring

Part #631028

Replaced by #631028A

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Manufacturer substitution
This part replaces 631028. Substitute parts can look different from the original.
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Needle Seat 631021
#30

Carburetor 640026 (71/143) diagram

Needle seat

Part #631021

Replaced by #631021B

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This part replaces 631021. Substitute parts can look different from the original.
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Starter 590694
#390

Engine 143.975508 (71/143) diagram

Starter

Part #590694

Replaced by #590785

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This part replaces 590694. Substitute parts can look different from the original.
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Lamination 34443A
#100

Engine 143.975508 (71/143) diagram

Lamination

Part #34443A

Replaced by #34443D

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This part replaces 34443A. Substitute parts can look different from the original.
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Generac Lawn & Garden Equipment Engine Fuel Line (replaces 14306, 34357) 29774
#290

Engine 143.975508 (71/143) diagram

Generac lawn & garden equipment engine fuel line (replaces 14306, 34357)

Part #29774

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Cap 36246
#301

Engine 143.975508 (71/143) diagram

Cap

Part #36246

Replaced by #37844

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This part replaces 36246. Substitute parts can look different from the original.
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Troybilt Lawn & Garden Equipment Engine Air Filter Collar Gasket 34338
#239

Engine 143.975508 (71/143) diagram

Troybilt lawn & garden equipment engine air filter collar gasket

Part #34338

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Carburetor 640026
Carburetor

Part #640026

Replaced by #640262A

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This part replaces 640026. Substitute parts can look different from the original.
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Float 632019
#28

Carburetor 640026 (71/143) diagram

Float

Part #632019

Replaced by #632019A

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Symptoms for gas walk-behind mowers

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

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

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

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

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

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…

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 rebuild a lawn mower carburetor

How to rebuild a lawn mower carburetor

The carburetor mixes air with fuel to drive the piston. Rebuild the carburetor if it's clogged or leaks.…

Repair difficulty
Time required
 60 minutes or less
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.…

Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower wheel

How to replace a lawn mower wheel

Learn how replace a damaged wheel on a walk-behind lawn mower—it's a quick, easy fix.…

Repair difficulty
Time required
 15 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

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What are the main components of a lawn mower?

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