Craftsman 143025501 engine Parts

Craftsman lawn mowers have been built with engines from multiple manufacturers over the years; the engine maker depends on the specific mower model and engine family. For Craftsman engine model 143025501, the parts list (carburetor, ignition, starter) aligns with a Tecumseh-style engine design, so you should match parts by model number and part ID.

What you will typically see on Craftsman mowers

Craftsman has commonly used engines from several major suppliers across different mower lines and production years:

• Briggs & Stratton
• Kohler
• Kawasaki
• Tecumseh (common on many older Craftsman mower and snow engine platforms)
• Other private-label or OEM variants depending on the mower series

How to identify the engine manufacturer on your mower

Use the engine ID information, not the mower deck branding, to confirm what you have.

• Look for an engine model and specification code stamped on the blower housing, valve cover, or recoil starter shroud
• Match the engine model number exactly (for this page, 143025501)
• Use the illustrated parts breakdown to confirm key assemblies (carburetor, ignition, starter)
• If the engine has hard-starting, no-spark, or fuel-leak symptoms, confirm the exact part by ID before ordering

Parts on this model page that help confirm fit

These are common “identity” parts that are frequently replaced and are specific to the engine family:

System	Example part on this model	What it affects
Fuel	Carburetor 640084B	Starting, surging, fuel delivery
Ignition	Ignition module 34443D	Spark, no-start, misfire
Starting	Starter 590787	Cranking speed, engagement
Fuel sealing	Needle seat 631021B	Flooding, fuel leaking into carb

Why it matters

Engine makers use different mounting patterns, linkages, and ignition air gaps; ordering by “Craftsman mower” alone often leads to the wrong carburetor or ignition coil. Matching parts to Craftsman 143025501 keeps repairs accurate and prevents repeat no-start or fuel issues.

Last updated: February 2026

Craftsman lawn mowers use several different engine types depending on the mower model; for Craftsman engine model 143025501, you are looking at a Tecumseh-built small gas lawn and garden engine (common features include an OHV or L-head design, a carburetor, and a magneto ignition system). To identify the exact engine family and specs, match the engine shroud tag numbers and then cross-check the parts list.

How to identify the exact engine type on your mower

Use these quick checks on the mower and engine:

• Confirm the engine model number on the blower housing tag: 143025501
• Look for a separate mower model number on the deck (the mower model determines what engine it shipped with)
• Note whether you have electric start or recoil start
• Check for a carburetor bowl drain and primer bulb (if equipped)
• Verify ignition style by locating the coil/module near the flywheel

What “kind of engine” usually means (and what to look for)

Most customers mean one of these identifiers:

What you want to know	Where to find it	Why it helps
Engine manufacturer/family	Engine model tag (143.xxxxx)	Confirms Tecumseh family and parts fit
Displacement (cc)	Engine label or spec decal	Helps match carburetor and tune-up parts
Starting system	Recoil starter or electric starter	Determines starter parts and wiring
Ignition type	Coil/module at flywheel	Helps diagnose no-spark issues

Parts that commonly define the engine system

If you are troubleshooting or confirming what you have, these parts are the “tells” for this engine platform:

• Fuel system: carburetor 640084B and needle seat 631021B
• Ignition system: ignition module 34443D
• Starting system: starter 590787 (recoil) or electric starter 33290H (electric start setups)

Why it matters

Engine type drives parts compatibility. For example, a carburetor, ignition module, or starter that fits one Craftsman mower engine may not fit another, even if the mower decks look similar.

Last updated: February 2026

You can get replacement parts for your Craftsman lawn and garden engine model 143025501 directly from the parts list for that model, so you can match the exact engine configuration and avoid fit issues. Common replacements include carburetor and ignition parts.

Best way to buy the right part for model 143025501

When you shop by the exact model number, you can quickly narrow down to the correct carburetor, starter, fuel system, and ignition components.

• Confirm the model number on the engine shroud or ID tag is 143025501
• Identify the system you are repairing (fuel, ignition, starting, sealing)
• Match symptoms to the most likely part (for example, no-start vs. fuel leak)
• Replace gaskets and O-rings when you disturb the carburetor or fuel fittings
• Use the part ID on the listing to avoid ordering the wrong revision

Popular Craftsman 143025501 parts customers replace

These are examples of parts available for this model that cover common no-start, hard-start, and fuel leak complaints:

Symptom	Common part to check	Example part for this model
Starts then dies, surges, runs lean	Carburetor and seals	Carburetor 640084B, Craftsman lawn and garden equipment engine carburetor gasket 26756
Fuel leaking from carburetor	Needle/seat, inlet fitting, O-ring	Needle seat 631021B, Craftsman lawn & garden equipment engine carburetor fuel inlet fitting 631807, Craftsman lawn & garden equipment engine carburetor o-ring 632547
No spark, intermittent spark	Ignition module	Ignition module 34443D
Starter will not crank engine	Starter assembly	Starter 590787

Why it matters

Craftsman engine parts can vary by engine family and production run, even when the equipment looks similar. Using the 143025501 model-based parts list helps ensure the carburetor, ignition module, and gaskets you order are the correct match.

Last updated: February 2026

Most lawn mower engines (including the Craftsman 143025501 lawn and garden engine) use the same core systems: fuel delivery, ignition, starting, and internal moving parts. On this model, common serviceable parts include the carburetor, ignition module, starter components, fuel tank parts, and engine gaskets.

Main engine systems (what they do)

• Fuel system: stores fuel and meters it into the engine (tank, cap, carburetor, inlet fitting, needle and seat)
• Air and fuel mixing: blends fuel with air for combustion (carburetor and its gaskets and O-rings)
• Ignition system: creates spark timing so the engine runs (ignition module, flywheel, spark plug on most engines)
• Starting system: spins the engine to begin running (starter or electric starter)
• Sealing and compression: keeps compression and oil where they belong (head gasket, oil seals)
• Internal engine parts: convert combustion into rotation (piston rings, connecting rod, valves)

Parts you will commonly see on Craftsman 143025501

Here are examples of real, replaceable parts for this engine model:

• Fuel metering and carburetion: carburetor 640084B, needle seat 631021B
• Ignition: ignition module 34443D, lawn & garden equipment engine flywheel 611199
• Fuel storage: Craftsman lawn & garden equipment engine fuel tank 35584, lawn & garden equipment engine fuel tank cap 37845
• Sealing and gaskets: Craftsman lawn and garden equipment engine cylinder head gasket 36443, Craftsman lawn & garden equipment engine oil seal 27897

Quick “what part is that?” cheat sheet

Engine area	What it affects	Common symptom when it fails
Carburetor and needle/seat	Fuel delivery and mixture	Hard starting, surging, flooding
Ignition module and flywheel	Spark timing	No-start, weak spark, misfire
Starter (recoil/electric)	Cranking speed	Won’t crank, grinding, intermittent start
Head gasket and oil seals	Compression and oil control	Low power, oil leaks, hard starting

Why it matters

Knowing which system you are troubleshooting helps you avoid replacing the wrong part. For example, a no-start is often ignition (coil/module) or fuel delivery (carburetor), while oil leaks point more toward seals and gaskets.

Last updated: February 2026