Lawn & Garden Engine

Model # 143989003 Official Craftsman engine

Here are the diagrams and repair parts for Official Craftsman 143989003 engine, as well as links to manuals and error code tables, if available.

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143989003 Engine
Repair Kit 632760
#NI

Carburetor 640051 diagram

Repair kit

Part #632760

Replaced by #632760B

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Manufacturer substitution
This part replaces 632760. Substitute parts can look different from the original.
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$25.02
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Gasket 27110
#44

Carburetor 640051 diagram

Gasket

Part #27110

Replaced by #27110A

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Manufacturer substitution
This part replaces 27110. Substitute parts can look different from the original.
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This item is not returnable
$2.49
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Troybilt Lawn & Garden Equipment Engine Fuel Line Clamp 26460
Troybilt lawn & garden equipment engine fuel line clamp

Part #26460

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$2.49
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Cook Top Side Trim Kit Lawn & Garden Equipment Engine Air Filter (replaces 28424l) 28424
#171

Engine 143.989003 diagram

Cook top side trim kit lawn & garden equipment engine air filter (replaces 28424l)

Part #28424

This item is not returnable
$4.14
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Cook Top Side Trim Kit Lawn & Garden Equipment Engine Air Filter 33268
#245

Engine 143.989003 diagram

Cook top side trim kit lawn & garden equipment engine air filter

Part #33268

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$16.59
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Troybilt Lawn & Garden Equipment O-ring 35499
#307

Engine 143.989003 diagram

Troybilt lawn & garden equipment o-ring

Part #35499

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$2.49
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Lawn & Garden Equipment Engine Throttle Control Bracket 34677
#200

Engine 143.989003 diagram

Lawn & garden equipment engine throttle control bracket

Part #34677

$46.81
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Generac Lawn & Garden Equipment Engine Stop Wire Terminal 610973
#206

Engine 143.989003 diagram

Generac lawn & garden equipment engine stop wire terminal

Part #610973

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$4.11
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Lamination 35135
#100

Engine 143.989003 diagram

Lamination

Part #35135

Replaced by #35135B

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Manufacturer substitution
This part replaces 35135. Substitute parts can look different from the original.
$58.79
9% OFF Phone Price : $64.79
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Generac Lawn & Garden Equipment Engine Air Filter Housing Gasket 27272A
#239

Engine 143.989003 diagram

Generac lawn & garden equipment engine air filter housing gasket

Part #27272A

This item is not returnable
$3.64
22% OFF Phone Price : $4.64
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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.

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Top questions about Sears and Sears PartsDirect

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What are the main components of a lawn mower?

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