Lawn & Garden Engine

Model # 143304012 Official Craftsman 4-cycle engine

Here are the diagrams and repair parts for Official Craftsman 143304012 4-cycle engine, as well as links to manuals and error code tables, if available.

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143304012 4-Cycle Engine
Lamination 34443
#90

Replacement parts diagram

Lamination

Part #34443

Replaced by #34443D

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Manufacturer substitution
This part replaces 34443. Substitute parts can look different from the original.
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Line 34357
#105

Replacement parts diagram

Line

Part #34357

Replaced by #29774

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Manufacturer substitution
This part replaces 34357. Substitute parts can look different from the original.
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Carburetor 632053
Carburetor

Part #632053

Replaced by #632795A

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Manufacturer substitution
This part replaces 632053. Substitute parts can look different from the original.
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Troybilt Lawn & Garden Equipment Engine Fuel Line Clamp 26460
#103

Replacement parts diagram

Troybilt lawn & garden equipment engine fuel line clamp

Part #26460

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Primer Line 32180B
#116

Replacement parts diagram

Primer line

Part #32180B

Replaced by #32180C

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Manufacturer substitution
This part replaces 32180B. Substitute parts can look different from the original.
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Troybilt Lawn & Garden Equipment Engine Flywheel Key (replaces 02-403) 611004
#42

Replacement parts diagram

Troybilt lawn & garden equipment engine flywheel key (replaces 02-403)

Part #611004

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$2.49
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Generac Lawn & Garden Equipment Engine Breather Filter 31410
#54

Replacement parts diagram

Generac lawn & garden equipment engine breather filter

Part #31410

This item is not returnable
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Fuel Fitting 631775
#26

Replacement parts diagram

Fuel fitting

Part #631775

Replaced by #632527

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Manufacturer substitution
This part replaces 631775. Substitute parts can look different from the original.
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$9.59
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Troybilt Carburetor Float 631024
#15

Replacement parts diagram

Troybilt carburetor float

Part #631024

This item is not returnable
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Drain Plug 27244
#28

Replacement parts diagram

Drain plug

Part #27244

Replaced by #36083

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Manufacturer substitution
This part replaces 27244. Substitute parts can look different from the original.
This item is not returnable
$7.89
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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.

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.…