How do I know what engine is in my lawn mower?
On your Craftsman riding mower model 247270421, the most reliable way to identify the engine is to read the engine identification label or stamping on the engine itself, then match that engine model/type code to the correct engine operator’s manual and tune-up parts. Use the 247270421 owner’s manual for the mower’s model and serial number locations and operating details.
Where to look for the engine ID
Check these common spots on riding mower engines (clean the area first so the numbers are readable):
- On the blower housing/shroud (often near the recoil area or top cover)
- On the valve cover or a nearby flat metal surface
- Near the spark plug area on the engine block
- On a sticker/plate near the muffler heat shield area (not on the muffler)
- Sometimes on the engine mounting base (requires a flashlight and mirror)
What numbers you need (and what they mean)
Most engines list multiple identifiers. Write them down exactly as shown.
| What you see on the engine | What it’s used for | Example of why it matters |
|---|---|---|
| Engine model / type | Identifies the engine family | Ensures the correct air filter and spark plug style |
| Code / spec number | Narrows to the exact build | Matches carburetor and ignition parts |
| Serial number | Production tracking | Helpful when two engines share a model number |
Quick tips to avoid misidentifying the engine
- Use the engine tag, not the tractor hood/deck decals.
- Record characters carefully (letters like O vs 0 are commonly mixed up).
- If the label is missing, check for a stamped pad on the block.
- Take a clear photo before ordering maintenance parts.
Why it matters
Your 247270421 mower manual covers tractor systems (starting procedure, safety interlocks, maintenance intervals), but engine service items like oil type, spark plug gap, and air filter style are set by the engine manufacturer. Correct engine ID prevents wrong tune-up parts and hard-starting issues.
Last updated: February 2026
Is it worth replacing a lawn mower engine?
Yes, it’s worth replacing the engine on your Craftsman riding tractor model 247270421 when the rest of the tractor (deck, steering, frame, wiring) is in good shape and the total repair cost stays well below the price of a comparable replacement tractor. If the tractor also has major drive or safety issues, replacement usually makes more sense.
Quick decision checklist
- Compare costs: If engine replacement plus labor is over about 50% of the tractor’s current value, replacement is typically the better buy.
- Check the drivetrain: If the transaxle is slipping or noisy, you may be stacking expensive repairs.
- Inspect the deck and spindles: A solid 46-in deck and good spindles make an engine swap more worthwhile.
- Confirm safety systems work: The manual warns not to tamper with safety interlocks; if they are unreliable, fix those first.
- Look for root cause: Overheating, poor idle, or vibration can come from maintenance issues, not a failed engine.
Before you replace the engine, rule out common “engine is bad” problems
Our manual troubleshooting guidance for this tractor points to several fixable causes:
- Overheating: low oil level or restricted airflow; clean debris from cooling fins and blower housing.
- Poor idle/hesitation: dirty air cleaner or incorrect spark plug gap.
- Excessive vibration: loose/unbalanced blades or a bent blade.
A worn or damaged blade is a common vibration culprit; if you need a correct replacement for the 46-in deck, use the OEM-style blade listed for this model such as the lawn tractor 46-in deck premium 2-in-1 blade 942-04290a.
Cost and outcome comparison
| Option | Upfront cost | What you gain | Best when |
|---|---|---|---|
| Tune-up and maintenance | Low | Restores starting, power, cooling | Engine runs but performs poorly |
| Engine replacement | Medium to high | Extends tractor life significantly | Tractor is otherwise solid |
| Replace tractor | Highest | New warranty, updated features | Multiple major systems are worn |
Why it matters
A riding mower engine swap is a big investment, and the manual emphasizes safe operation and proper maintenance (tight fasteners, intact safety devices, correct blade condition). If the tractor is structurally sound, a new engine can be a smart way to extend service life; if multiple systems are failing, costs add up fast.
For model-specific maintenance intervals, safety checks, and troubleshooting steps, use the 247270421 owner’s manual.
Last updated: February 2026
What brand engine does Craftsman use?
Craftsman riding lawn tractors like model 247270421 are commonly equipped with engines supplied by major small-engine manufacturers; the exact engine brand varies by the specific tractor configuration. For your mower, we recommend confirming the engine make and model directly on the engine label and in the 247270421 operator’s manual.
How to identify the engine brand on your Craftsman 247270421
Look for the engine identification label (usually a sticker or metal tag) and record the key fields.
- Check the top of the engine shroud or near the valve cover
- Look around the starter area or blower housing
- Record the engine model, type, and code (or spec number)
- Match that information to the engine section in the manual
- Use the engine model when ordering tune-up parts (spark plug, air filter, oil filter)
Common engine brands used on Craftsman lawn tractors
Craftsman has used several engine suppliers across different model families and years. These are the most common brands you will see on front-engine lawn tractors.
| Engine brand | Where you’ll usually see it | What to use for parts lookup |
|---|---|---|
| Briggs & Stratton | Many Craftsman riders | Engine model/type/code from the label |
| Kohler | Some mid to higher output riders | Engine model/spec number |
| Kawasaki | Some premium configurations | Engine model/spec number |
Why it matters
The tractor model number (247270421) helps us find chassis and deck parts, but the engine brand and engine model determine the correct maintenance parts and service specs (oil type, spark plug, air filter, valve settings). The operator’s manual also notes that you should follow both the tractor manual and the engine operator’s manual for proper operation and maintenance.
Related maintenance tip for this model
Because this tractor family uses Smart Lawn Technology, you can also track maintenance items like oil, blade, and air filter through the Craftsman Smart Lawn App once paired.
If you are replacing cutting components, match the deck size and blade style; for many 46-inch deck setups, a common replacement is the Craftsman lawn tractor 46-in deck premium 2-in-1 blade 942-04290a.
Last updated: February 2026
What model number is a Craftsman 6.75 lawn mower?
“6.75” on a Craftsman mower is an engine power class, not a mower model number. For the Craftsman front-engine lawn tractor covered here, the model number is 247270421; use it to match the correct parts diagrams and specifications in the 247270421 operator’s manual.
How to identify the correct model number (and why “6.75” is not enough)
If you are trying to look up parts for a Craftsman mower, the model number comes from the equipment ID label, not the engine rating.
- Use the equipment model number to find chassis and deck parts (belts, blades, pulleys, steering parts)
- Use the engine model/type/code only for engine-specific parts (carburetor, ignition, air filter)
- Treat “6.75” as a power class that appears on many different Craftsman machines
- Record the full model and serial exactly as printed on the label
- For this tractor, use 247270421 when ordering parts
Where to find the ID label on a front-engine lawn tractor
On Craftsman riding tractors like model 247270421, the ID label is typically on the tractor frame, not on a walk-behind mower deck.
- Under the seat on the seat pan or frame
- On the frame rail near the engine compartment
- Near the rear hitch plate or rear frame area
- Sometimes near the footrest area on the frame
Quick reference: what number to use
| What you see | What it identifies | What to use it for |
|---|---|---|
| Model number 247270421 | The tractor (chassis and deck system) | Parts diagrams, belts, blades, electrical, steering |
| Engine model/type/code | The engine only | Engine tune-up and engine components |
| “6.75” marking | Engine power class | Not reliable for parts lookup |
Why it matters
Ordering parts by “6.75” often leads to the wrong belt, blade, or electrical part because many Craftsman models share similar engine ratings. Using the exact model number (like 247270421) ensures the parts match your tractor’s configuration.
Last updated: February 2026
What year did Craftsman make the 247270421?
Craftsman model 247270421 is part of the Craftsman lawn tractor family covered by an Operator’s Manual dated November 27, 2017, so this tractor series was in production by 2017. For the exact build year of your specific unit, match the serial number format shown in the 247270421 operator’s manual.
What we can confirm for model 247270421
The Operator’s Manual for this model group lists 247.27042* (the asterisk indicates the last digit varies by version) and shows a publication date of November 27, 2017. That date is the most reliable timestamp tied to this model family.
- The manual covers multiple related models, including 247.27042*
- Features can vary by model within the same manual
- The manual date indicates the series existed by late 2017
- Your tractor’s serial number is the best way to pinpoint the build timeframe
How to find the exact year for your specific tractor
Use the ID label on the tractor (commonly under the seat, on the frame, or near the engine area) and record both the model and serial.
- Locate the product ID tag and write down the serial number
- Compare the serial number pattern to the identification guidance in the manual
- Keep the serial number handy when ordering parts or scheduling service
- If the tag is damaged, check for a secondary label on the frame or under the hood
Quick guide: “manual date” vs “build year”
| Item | What it tells you | Best use |
|---|---|---|
| Manual publication date (11/27/2017) | When the documentation was issued for the model family | Confirms the series timeframe |
| Serial number | When your specific tractor was built | Identifies exact year/production run |
| Model number (247270421) | The configuration family | Ensures correct parts fit |
Why it matters
Craftsman tractors often have mid-year design changes (belts, pulleys, wiring, deck hardware). Using the correct build information helps you avoid ordering the wrong drive belt, blade drive belt, or electrical parts.
Last updated: February 2026
Where can I find the Craftsman riding mower model number?
On Craftsman riding lawn tractor model 247270421, the model number is on the product identification label on the tractor (commonly under the seat area). Use that model number and the serial number when ordering parts, checking the operator information, or pairing the mower to the Smart Lawn app; see the 247270421 operator’s manual.
Where to look on the tractor
Check these common label locations first (clean off grass and dirt so the print is readable):
- Underside of the seat or the seat mounting pan
- Frame rail near the seat base
- Rear fender area near the seat
- Under the hood near the engine compartment (less common)
- On a metal or heavy-duty sticker label (not a paper tag)
What you should write down
Record the full identification exactly as printed.
- Model number (for this tractor, it will match 247270421)
- Serial number (needed for correct part variations)
- Any date code or additional numbers on the same label
Why it matters
The operator’s manual notes that it covers multiple models and that features can vary by model. Having the exact model and serial helps us match the correct deck parts, belts, blades, and electrical components for your specific build.
Quick reference
| Item | What it’s used for | Example for this tractor |
|---|---|---|
| Model number | Identifies the tractor family and configuration | 247270421 |
| Serial number | Identifies the exact production run | Printed on the same label |
| Manual model list | Confirms the manual covers a model series | 247.27042* series |
If you are using the Smart Lawn app
The manual explains the app will prompt you to enter the mower’s model number and serial number, then connect via Bluetooth when the engine is running and the phone is within range. Use the same label information you found under the seat.
Last updated: February 2026





