What brand engine does Craftsman use?
Craftsman uses engines from several manufacturers, and the brand depends on the specific Craftsman model. For Craftsman engine model 143961005, the parts list includes Tecumseh-labeled components (such as a pre-filter), which points to a Tecumseh-built small engine for this model.
What you will see on Craftsman equipment
Across Craftsman lawn and garden equipment, common engine suppliers include:
- Briggs & Stratton
- Kohler
- Kawasaki
- Tecumseh (especially on many older Craftsman engines)
How to confirm the engine brand on model 143961005
Use the engine ID information on the engine itself to match parts correctly.
- Find the engine ID tag or stamped numbers on the blower housing or shroud
- Record the full model and specification numbers
- Use those numbers to select the correct tune-up and repair parts for 143961005
- Match maintenance parts by shape and mounting style (air filter, pre-filter, fuel line)
Parts on this model page that support the Tecumseh match
These items are typical Tecumseh small-engine service parts and are listed for model 143961005:
- Tecumseh lawn & garden equipment engine pre-filter 35881 (air intake pre-filter)
- Craftsman lawn & garden equipment engine air filter 28424 (main air filter)
- Craftsman lawn & garden equipment engine fuel line 30962 (fuel delivery)
| What you are checking | Why it helps identify the engine | Example from this model page |
|---|---|---|
| Air intake parts | Filter style often matches a specific engine family | Pre-filter and air filter listings |
| Fuel system parts | Line sizes and routing are engine-specific | Fuel line |
| Ignition parts | Module style varies by OEM | Ignition module listings |
Why it matters
Engine brand and spec numbers determine the exact air filter, carburetor parts, ignition module, and gaskets that fit. Matching parts to Craftsman 143961005 prevents hard starting, surging, and repeat repairs.
Last updated: February 2026
What model number is a Craftsman 6.75 lawn mower?
Many Craftsman mowers described as “6.75” use different model numbers depending on the exact mower and engine combination; one common example is Craftsman model 917377911 (21-inch 6.75-hp rotary mower). To match yours correctly, we use the model number from the mower’s ID tag, not the horsepower label.
Where to find the correct model number
Look for a sticker or metal tag on the mower, then match the full number exactly.
- Under the seat area or rear deck (walk-behind: near the back of the deck)
- On the side of the deck near the rear wheel
- Near the handle mount brackets
- On the frame by the engine mounting area
- Sometimes on the bagger frame (if equipped)
“6.75” is not a model number (why that matters)
“6.75” is typically an engine power description used across multiple Craftsman mower models. The model number is what we use to pull the correct illustrated parts list for items like the air filter, fuel line, and carburetor.
| What you see | What it tells us | What to do |
|---|---|---|
| “6.75” on the shroud/decal | Engine power family | Keep looking for the ID tag |
| Craftsman mower model number (often starts with 917.) | Exact mower configuration | Use this to find the right parts |
| Engine model number (often Tecumseh-style numbers) | Exact engine build | Use this for engine-specific parts |
If you are working on the engine (model 143961005)
If your engine tag shows 143961005, you are already on the correct engine parts list for that Craftsman engine. Common maintenance and fuel/air issues on this engine often involve the air filter, pre-filter, fuel line, or carburetor.
- Replace a dirty filter with Craftsman lawn & garden equipment engine air filter 28424
- If equipped with foam, service the tecumseh lawn & garden equipment engine pre-filter 35881
- Fix cracked or leaking fuel supply with Craftsman lawn & garden equipment engine fuel line 30962
- Address hard-starting or surging with Craftsman lawn and garden equipment engine carburetor 632242
Why it matters
Using the exact model number prevents ordering the wrong parts and helps ensure correct fit, fuel delivery, and safe engine operation after repair.
Last updated: February 2026
Where can I find my lawn mower engine model number?
On your Craftsman lawn and garden engine, the engine model number is typically stamped directly into the metal on the engine shroud or cylinder area. For model 143961005, start by checking the top of the cylinder and the sides of the engine block for a stamped or engraved number.
Where to look on the engine
Check these common locations first (wipe dirt and oil off before reading):
- Top of the cylinder head or near the spark plug area
- Side of the engine block, near the muffler or carburetor
- Recoil starter housing or blower housing (often near the pull-start)
- Valve cover area (if equipped)
- A metal tag or decal on the shroud (if still present)
How to read it and avoid mix-ups
Engine identification is often grouped together. Here is what you may see and what it means.
| What you see | What it usually means | Why it matters |
|---|---|---|
| Model number | The engine family/series identifier | Ensures parts diagrams match your engine |
| Spec number | The exact configuration (governor, carb, crank) | Prevents ordering the wrong carburetor or gasket |
| Serial number | Production run identifier | Helps confirm revisions and production changes |
Why it matters for parts and repairs
Using the correct engine model number helps us match the right tune-up and fuel system parts for your Craftsman engine, such as the Craftsman lawn & garden equipment engine air filter 28424 or the Craftsman lawn and garden equipment engine carburetor 632242. A close-looking engine can still use different gaskets, linkages, or ignition parts depending on the spec.
Quick prep checklist before you search parts
- Let the engine cool completely
- Disconnect the spark plug wire to prevent accidental starting
- Clean the stamping area with a rag and a little degreaser
- Write down the full model and any spec/serial numbers exactly as shown
Last updated: February 2026
Where can I get Craftsman replacement parts?
You can get replacement parts for your Craftsman engine model 143961005 directly from the parts list for that model on Sears PartsDirect; matching the model number first is the fastest way to ensure the part fits and functions correctly.
Best way to buy the right part for model 143961005
We recommend starting with the model-specific parts list, then choosing the exact part by name and ID.
- Confirm the engine model number is 143961005 on the ID tag
- Match the part by function (air intake, fuel, ignition, starter)
- Replace gaskets and seals when you remove a carburetor or intake part
- Use the same maintenance type parts (oil, air filter, pre-filter) at regular intervals
- If your engine is hard to start, check air, fuel, and spark before ordering major parts
Common replacement parts customers order for this engine
These are examples of model-matched parts available for Craftsman 143961005:
| What you are fixing | Part to check first | What it affects |
|---|---|---|
| Runs rough, lacks power | Craftsman lawn & garden equipment engine air filter 28424 | Airflow and fuel mixture |
| Fuel smell, leaks, won’t stay running | Craftsman lawn & garden equipment engine fuel line 30962 | Fuel delivery and safety |
| Won’t start, fuel issues suspected | Craftsman lawn and garden equipment engine carburetor 632242 | Starting and throttle response |
| No spark or intermittent spark | Lamination 35135B | Ignition spark timing |
Why the model number matters
Craftsman outdoor power equipment engines can have similar-looking parts that mount differently or use different linkages. Using the exact model number 143961005 helps prevent ordering an air filter, carburetor, or ignition module that does not seal correctly or connect to your throttle and fuel system.
If you are shopping for parts beyond the basics
If you do not see what you need in the featured list, use the full model parts breakdown for 143961005 to locate assemblies such as the starter, flywheel, muffler, fuel tank, and internal engine components.
Last updated: February 2026




