Owner’s manual
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How to tell if mower deck spindles are bad?
Bad mower deck spindles on your Craftsman 247270491 typically show up as loud grinding or squealing, excessive deck vibration, an uneven cut, or a blade that feels loose or wobbles. Confirm by safely checking blade play and listening for bearing noise while the deck is disengaged (OFF); see the owner's manual.
Quick checks that point to a bad spindle
- Blade wobble or looseness: with the key removed, try rocking each blade tip up and down.
- Grinding or roughness: rotate the blade by hand; a bad bearing feels gritty or catches.
- Excessive vibration: vibration that persists after blade sharpening often traces to spindle bearings or a bent spindle shaft.
- Uneven cut: one side leaving taller grass can be a spindle issue (also check deck level and tire pressure).
- Heat at the spindle area: after mowing, a failing bearing often runs hotter than the others.
Safe inspection steps (what we do)
- Park on a flat surface, set the parking brake, shut the engine off, and remove the key.
- Disengage the PTO (OFF) and wait for all moving parts to stop.
- Use heavy gloves and inspect each blade and spindle area for cracks or damage.
- Spin each blade by hand and feel for roughness; then check for side-to-side or up-and-down play.
What symptoms usually mean
| Symptom | Most likely cause | What to check next |
|---|---|---|
| Grinding/squealing from deck | Spindle bearing failure | Spin blade by hand; listen/feel for roughness |
| Strong vibration | Unbalanced blade or worn spindle | Balance blade; check spindle play |
| Uneven cut | Deck out of level, tire pressure, or spindle issue | Level deck; verify tire pressure; inspect spindle |
| Blade won’t stay tight | Worn spindle shaft or mounting hardware | Inspect shaft, threads, and fasteners |
Why it matters
A worn spindle bearing can damage blades, belts, and the deck housing. The manual also warns to inspect the blade and/or spindle for cracks or damage, especially after striking an object, and to replace damaged components before operating.
Parts that often get replaced with spindle problems
If vibration or cut quality points to blade damage, replacing blades is a common first step. For this model, we often see customers replace the Craftsman lawn tractor 46-in deck premium 2-in-1 blade 942-04290a and then re-check vibration. You can order parts from the list for model 247270491, or search by model on Sears PartsDirect.
Last updated: February 2026
What year did Craftsman make the 247270491?
The Craftsman lawn tractor model 247270491 aligns with the Craftsman operator’s manual form dated November 27, 2017, so this model series is from the 2017 era. For the exact build year of your specific tractor, use the model and serial number information shown in the owner's manual.
How to identify the exact year for your specific tractor
We use the model number to match the correct documentation, but the serial number is what pinpoints the production run.
- Locate the model and serial number tag on the tractor (commonly under the seat area or on the frame near the seat pan).
- Write the serial number exactly as shown (letters and numbers).
- Compare the model family listed in the manual (247.27049* series) to confirm you are in the right group.
- Keep the tag information with your maintenance records for ordering belts, blades, and electrical parts.
What the manual date tells you (and what it does not)
The manual date is a reliable indicator of the time period the model family was sold, but it is not the same as the exact day your unit was assembled.
| Item | What it indicates | Best use |
|---|---|---|
| Manual form date (11/27/2017) | Model family timeframe | Dating the series |
| Serial number | Specific production run | Identifying exact year |
| Parts diagrams and part numbers | Correct fit for repairs | Ordering the right part |
Why it matters
Knowing the correct year and serial range helps us match the right Craftsman and MTD-style components (like deck blades, drive belts, and safety switches) so you avoid fit issues during repairs.
Common parts that vary by production run
Even within the same model family, these items often change by serial break:
- Deck blade style and mounting
- Ground drive belt length
- Blade drive belt routing
- Interlock (safety) switch configuration
- Wire harness connectors
When you are ready to order, start with the parts list for model 247270491, or search by model number on Sears PartsDirect.
Last updated: February 2026
What kind of engine does a Craftsman riding lawn mower have?
Craftsman riding lawn mowers use gasoline-powered, low-emission engines; the exact engine make, model, and horsepower depend on the specific tractor model. For Craftsman model 247270491, use the 247270491 owner's manual and the engine operator’s manual it references to identify the engine details and maintenance requirements.
How to identify the engine on model 247270491
Use these checks to confirm what engine your tractor has:
- Look for the engine ID label on the engine shroud or valve cover (often lists model, type, and code).
- Match the engine label information to the engine operator’s manual referenced in the 247270491 owner's manual.
- Record your tractor model and serial number (needed for Smart Lawn App setup and parts matching).
- Compare the engine’s air filter housing and muffler layout to diagrams in the manual.
- If you are ordering tune-up parts, confirm the engine family first so you get the correct spark plug, air filter, and oil filter.
What we can say from the manual (applies to this Craftsman tractor family)
The operator’s manual for this Craftsman lawn tractor series describes:
| Item | What to expect |
|---|---|
| Fuel type | Gasoline (fill to the bottom of the fuel tank neck) |
| Emissions | Low-emission engine design |
| Maintenance reference | Engine oil level and service steps are in the engine operator’s manual |
| Smart features | Bluetooth-enabled Smart Lawn App support |
Why it matters
Engine identification prevents wrong-part orders and helps you follow the correct service intervals. It also ensures you use the right oil type and capacity, which protects the engine from premature wear.
Parts that commonly relate to engine operation
If you are troubleshooting a no-start or safety shutoff issue, these model-related parts are often involved:
- Lawn tractor interlock switch 725-04363 (safety circuit that can prevent starting)
- Lawn tractor wire harness 725P06127C (wiring connections for starting and safety circuits)
For broader parts shopping by model number, we also offer search and ordering tools on Sears PartsDirect.
Last updated: February 2026
What are the parts of a tractor engine?
On the Craftsman 247270491 front-engine lawn tractor, the engine is built from core internal parts (like the cylinder, piston, crankshaft, and valves) plus supporting systems (fuel, ignition, cooling air flow, and lubrication) that let it start, run smoothly, and stay protected under load. For model-specific service points and safety steps, use the owner's manual.
Main engine parts (what they do)
These are the common components you will hear referenced in troubleshooting and tune-ups:
- Cylinder and cylinder head: forms the combustion chamber where power is made.
- Piston and piston rings: compress the fuel-air mix and transfer force to the crankshaft.
- Connecting rod and bearings: link piston motion to crank rotation while reducing friction.
- Crankshaft: converts up-and-down piston movement into rotating power.
- Camshaft, valves, and valve guides: control intake and exhaust timing.
- Gaskets and seals: keep compression, oil, and fuel where they belong.
Supporting systems you service most often
On a riding mower engine, these systems cause most “won’t start” and “runs rough” complaints:
- Ignition (key switch, safety interlocks, spark plug, wiring)
- Fuel delivery (tank, fuel line, filter, carburetion or injection depending on engine)
- Air intake (air filter and intake screens)
- Lubrication (engine oil, oil pump on some designs)
- Cooling air flow (cooling fins and intake screens that must stay clear of debris)
Quick reference: symptom to likely engine-area parts
| Symptom | Common engine-area suspects | First checks |
|---|---|---|
| Clicks but won’t crank | Battery, starter circuit, interlock switch | Brake set, PTO off, battery connections |
| Cranks but won’t start | Spark plug, fuel quality, choke/throttle setting | Fresh fuel, throttle in FAST, choke off after start |
| Runs rough | Choke left on, dirty air filter, stale fuel | Air filter clean, cap vent clear, fresh fuel |
Why it matters
Knowing which parts are “internal engine” versus “supporting systems” helps you diagnose faster and avoid replacing the wrong items. It also supports safer operation; for example, the manual calls out proper throttle/choke use and safe stopping steps.
Ordering parts for this model
We list common replacement items for the 247270491 on the parts list for this model, and you can also search by model number on Sears PartsDirect.
Last updated: February 2026
What model number is a Craftsman 6.75 lawn mower?
A Craftsman “6.75” walk-behind mower is not identified by the 6.75 engine rating; the correct model number is the full number printed on the mower’s ID label. On this page, the model number 247270491 is for a Craftsman front-engine lawn tractor, not a 6.75 walk-behind mower. Use the 247270491 owner's manual to see how Craftsman lists and records model and serial numbers.
How to find the model number on a Craftsman walk-behind mower
Check the mower for a model/serial label in these common locations:
- Rear of the mower deck near the bagging door
- Side or top of the deck near the engine mounting area
- Frame near a rear wheel
- Handle bracket or handle support area
- Paperwork that came with the mower (manual, quick-start sheet)
What the model number usually looks like
Craftsman walk-behind mower model numbers are typically a longer numeric code (often 9 to 11 digits) and may include a suffix. Write it down exactly as shown.
| Marking you see | What it means | Use it for parts lookup? |
|---|---|---|
| “6.75” | Engine power class | No |
| Model number | Exact mower identity | Yes |
| Serial number | Production identifier | Sometimes |
Why “6.75” is not enough for parts
Multiple Craftsman mowers can share the same engine rating but use different blades, wheels, drive systems, and deck designs. The model number is what matches the correct diagrams and replacement parts.
If you are ordering parts
Use this checklist before you buy:
- Model number from the mower label
- Serial number from the same label
- Deck size (commonly 21 in on walk-behind mowers)
- Engine brand and model (from the engine tag)
You can order parts for your Craftsman equipment from the parts list for the correct model, or search by model number on Sears PartsDirect.
Why it matters
Using the exact model number prevents ordering the wrong blade, belt, or hardware and speeds up troubleshooting because procedures and diagrams are model-specific.
Last updated: February 2026
