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How to look up Craftsman model number?
To look up the correct parts for your Craftsman model 842240721 (40" snow blower accessory), start by finding the model number on the equipment’s ID label, then enter that exact number when searching for parts. Using the full model number prevents ordering the wrong belts, shear pins, or hardware.
Model-number labels vary by product type, but these are the most common locations to check:
- On the rear of the housing or frame (near the wheels or handle mount)
- On the side of the frame, close to the engine or attachment mount
- Near the chute or auger housing area (snow equipment)
- Under a seat or on the frame rail (riding equipment)
- On a sticker or metal tag near the control panel
If the label is dirty or faded, wipe it with a damp rag first; then use a flashlight to read stamped characters.
Record the information exactly as shown on the label.
| Label item | What it’s used for | Example format |
|---|---|---|
| Model number | Primary identifier for parts lookup | 842240721 |
| Serial number | Helps confirm production run and revisions | Letters and numbers |
| Product name/type | Helps narrow category | 40" snow blower |
Craftsman equipment can have multiple versions that look similar but use different components. Entering the exact model number (and keeping the serial number handy) helps match the correct diagrams and compatible replacement parts.
If you are unsure whether you copied the label correctly, use our guide: how to find your appliance model number (and what it means for parts).
Last updated: February 2026
Where can I get Craftsman replacement parts?
For your Craftsman model 842240721 (40" snow blower accessory), we recommend buying replacement parts through Sears PartsDirect or other authorized Craftsman parts sellers. The most important step is matching the exact model number 842240721 so the part fits and performs correctly.
- Sears PartsDirect (model-based lookup for diagrams and compatible parts)
- Craftsman-authorized retailers (online or in-store)
- The official Craftsman parts channel for your product line
- Reputable small-engine and outdoor power equipment parts dealers (helpful for belts, shear pins, cables, and hardware)
Use this checklist before ordering:
- Confirm the model number is 842240721 (not just “Craftsman 40 inch”)
- Identify the part by name and location on the machine (auger area, chute, drive system, controls)
- Compare the old part’s measurements when applicable (belt width/length, cable length, fastener size)
- Check whether your snow blower uses a separate engine brand (common on outdoor power equipment) because engine parts can be brand-specific
- If the part is safety-related (shear pins, guards, shields), match it exactly
| Part type | What it affects | Typical symptom when worn |
|---|---|---|
| Shear pins | Auger protection | Auger stops turning after jam |
| Drive belt | Self-propel/auger drive | Slipping, no movement, squeal |
| Friction wheel/rubber | Drive traction | Poor drive, surging movement |
| Skid shoes/scraper bar | Clearing height and wear | Uneven scraping, poor pickup |
Outdoor power equipment parts are fit-sensitive. Using the correct model number helps you avoid returns, prevents premature wear, and keeps your Craftsman snow blower operating safely in heavy snow.
For help confirming the exact model number format and where to find it on the unit, use how to find your appliance model number (and what it means for parts).
Last updated: February 2026
What is the average lifespan of 842240721?
A Craftsman 842240721 40-inch snow blower typically lasts 10 to 15 years with normal residential use and consistent maintenance. Lifespan depends most on off-season storage, shear pin events, belt condition, and keeping the auger and chute clear of packed snow.
- Light use (small driveway, dry snow, stored indoors): 12 to 15 years
- Moderate use (mixed snow, seasonal tune-ups): 10 to 12 years
- Heavy use (wet snow, frequent clogging, stored outdoors): 7 to 10 years
- Neglected maintenance (old fuel, worn belts, rust): 5 to 8 years
These items usually determine whether the machine feels “worn out” even if the engine still runs:
- Drive and auger belts (slipping, squealing, weak throwing)
- Shear pins/bolts (break to protect the auger gearbox)
- Friction disc or drive system components (poor self-propel)
- Skid shoes and scraper bar (uneven clearing, excessive housing wear)
- Cables and chute controls (stiff, seized, or out of adjustment)
- Change engine oil on schedule; check level before each storm
- Use fresh fuel and stabilizer; run the carburetor dry for storage
- Inspect belts each season; replace at the first signs of cracking or glazing
- Keep the auger area clear; shut off the engine before clearing jams
- Store dry and covered to prevent rust on the housing and chute
| If you see this symptom | Most common cause | Usually worth doing |
|---|---|---|
| Weak throwing distance | Belt slip, clogged chute, worn paddles/auger issues | Clean, adjust, then replace wear parts |
| No self-propel or surging drive | Friction disc wear, cable adjustment | Service drive system |
| Frequent stalling | Fuel/carburetor maintenance | Tune-up and fuel system service |
A snow blower can run for many years, but performance drops fast when wear parts are ignored. Staying ahead of belts, drive wear, and rust prevention keeps your Craftsman 842240721 clearing like it should and reduces mid-storm breakdowns.
For help confirming you have the correct model number before ordering maintenance items, use [how to find your appliance model number (and what it means for parts)].
Last updated: March 2026
