Lawn & Garden Engine

Model # 143034504 Official Craftsman engine

Here are the diagrams and repair parts for Official Craftsman 143034504 engine, as well as links to manuals and error code tables, if available.

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143034504 Engine
Needle Valve 631021A
#30

Carburetor diagram

Needle valve

Part #631021A

Replaced by #631021B

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Manufacturer substitution
This part replaces 631021A. Substitute parts can look different from the original.
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$9.79
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Troybilt Lawn & Garden Equipment Engine Carburetor Rebuild Kit (replaces 632760a, 632809) 632760B
#60

Carburetor diagram

Troybilt lawn & garden equipment engine carburetor rebuild kit (replaces 632760a, 632809)

Part #632760B

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Lamination 34443C
#100

Tecumseh engine diagram

Lamination

Part #34443C

Replaced by #34443D

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Manufacturer substitution
This part replaces 34443C. Substitute parts can look different from the original.
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Lawn & Garden Equipment Engine Recoil Starter Rope, 98-in (replaces 1258, 28288, 28358, 28528, 30971, 31285, 31395, 31396, 31696, 590451a, 590456, 590527, 730608, 740032) 590535
Lawn & garden equipment engine recoil starter rope, 98-in (replaces 1258, 28288, 28358, 28528, 30971, 31285, 31395, 31396, 31696, 590451a, 590456, 590527, 730608, 740032)

Part #590535

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Lawn & Garden Equipment Engine Carburetor Float Bowl Washer (replaces 49-084) 27110A
#44

Carburetor diagram

Lawn & garden equipment engine carburetor float bowl washer (replaces 49-084)

Part #27110A

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Air Clnr Cvr B35065
#250

Tecumseh engine diagram

Air clnr cvr

Part #B35065

Replaced by #35065

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Manufacturer substitution
This part replaces B35065. Substitute parts can look different from the original.
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Troybilt Lawn & Garden Equipment Engine Fuel Line Clamp 26460
#292

Tecumseh engine diagram

Troybilt lawn & garden equipment engine fuel line clamp

Part #26460

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Troybilt Lawn & Garden Equipment Engine Air Filter Collar Gasket 34338
#239

Tecumseh engine diagram

Troybilt lawn & garden equipment engine air filter collar gasket

Part #34338

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Troybilt Lawn & Garden Equipment Engine Oil Seal 27897
#75

Tecumseh engine diagram

Troybilt lawn & garden equipment engine oil seal

Part #27897

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$7.02
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Troybilt Lawn & Garden Equipment Engine Carburetor O-ring 632547
#37

Carburetor diagram

Troybilt lawn & garden equipment engine carburetor o-ring

Part #632547

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$3.64
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Symptoms for gas walk-behind mowers

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

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

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

Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent…

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

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 drive cable

How to replace a lawn mower drive cable

The drive cable engages the transmission to spin the drive wheels and move the mower across the grass. Replace the drive…

Repair difficulty
Time required
 60 minutes or less
How to replace a lawn mower starter rope

How to replace a lawn mower starter rope

These step-by-step instructions show how to replace a broken starter pull rope on a walk-behind lawn mower.…

Repair difficulty
Time required
 30 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.…