Craftsman 247374860 lawn mower Parts

For the Craftsman 247374860 walk-behind mower, the ground drive belt listed for this model is 3/8-inch wide by 31-1/4 inches long. Use your owner's manual to confirm routing and tensioning so the self-propel drive engages smoothly.

Walk-behind mowers can have more than one belt type; this model’s parts list calls out a ground drive belt (self-propel belt), not a 42-inch deck belt used on riding mowers.

• Ground drive belt: drives the transmission/wheels for self-propel
• Deck belt: common on riding mowers; not the same application
• Correct fit matters: width and length affect speed, traction, and belt life

Here is the belt specification from the model’s available parts:

If you’re replacing the belt because the mower will not self-propel, we also recommend inspecting the drive system for binding and checking the transmission input pulley area for debris.

• Disconnect the spark plug wire before working near the blade or belt path
• Verify the belt is seated in all pulleys and guides (no twists)
• Check for worn belt guides, bent brackets, or loose fasteners
• Confirm the drive control cable moves freely and returns fully
• Test on flat ground first; then test under light load

A belt that is even slightly off-size can cause constant slipping (premature wear) or over-tension (hard engagement and extra load on the transmission). Using the correct 954-04282 size helps restore normal self-propel performance.

Last updated: February 2026

For your Craftsman 247374860 gas walk-behind mower, we recommend using fresh, regular unleaded gasoline (87 octane). Higher-octane “premium” fuel does not improve performance in typical small mower engines; using clean, fresh fuel matters most for easy starting and smooth running.

• Use regular unleaded 87 octane from a busy station (fresher fuel).
• Use fresh fuel; most mower fuel is best used within about 30 days.
• If fuel will sit, mix in a fuel stabilizer before storage.
• Avoid old gas (stale fuel is a top cause of hard starting).
• Avoid spills on hot parts; let the engine cool before refueling.

Fuel quality affects the carburetor, starting, and idle stability. Fresh 87 octane helps prevent gum and varnish buildup that can lead to no-start symptoms and rough running.

• Follow the fueling and storage instructions in the owner's manual.
• If the mower struggles to move after it has been sitting, inspect the drive system and belt condition; the lawn mower ground drive belt, 3/8 x 31-1/4-in 954-04282 is a common wear item.
• For seasonal storage, use our guide: how to winterize a lawn mower.

Last updated: February 2026

Most gas walk-behind mowers, including Craftsman model 247374860, are designed to run on gasoline blended with up to 10% ethanol (E10). Using fuel with more than 10% ethanol (such as E15 or E85) commonly causes hard starting, rough running, and fuel-system damage.

Ethanol percentage is the amount of alcohol blended into gasoline:

We recommend these practical rules for day-to-day mowing:

• Use fresh gasoline (older fuel is a top cause of no-start issues).
• Choose E10 or lower; avoid E15 and higher blends.
• If the mower will sit more than a few weeks, buy smaller amounts of fuel more often.
• Keep the fuel container sealed and stored in a cool, dry place.
• If you suspect bad fuel, drain the tank and refill with fresh gas before troubleshooting ignition or compression.

For any model-specific fuel notes (and any storage or maintenance steps), follow the 247374860 owner's manual.

Higher-ethanol fuel attracts moisture and can separate during storage; that leads to varnish in the carburetor, swollen fuel lines, and poor performance. Sticking with E10 or lower helps protect the fuel system and keeps starting and power consistent.

Last updated: February 2026

Common problems on the Craftsman 247374860 gas walk-behind mower usually fall into a few buckets: starting issues (fuel, spark, air), poor cutting (blade and deck condition), and self-propel problems (belt, cable, transmission). We use the owner's manual to match symptoms to the correct checks and adjustments.

• Won’t start or starts then dies: old fuel, dirty carburetor, fouled spark plug, clogged air filter
• Runs rough or surges: stale fuel, partially clogged carburetor, restricted airflow
• Hard to pull the starter rope: blade obstruction, bent blade, engine hydro-lock from overfilled oil
• Poor cut quality or uneven cut: dull/bent blade, grass buildup under deck, incorrect cutting height
• Self-propel won’t move or slips: worn drive belt, stretched/misadjusted drive cable, transmission wear
• Excessive vibration: loose blade hardware, damaged blade adapter, bent crankshaft (after impact)

1. Safety first: disconnect the spark plug wire before working near the blade.
2. Fuel: drain old gas and refill with fresh fuel; check for water or varnish smell.
3. Air and spark: clean/replace the air filter; inspect and replace the spark plug if fouled.
4. Oil level: verify the oil is at the correct mark (too much oil can cause hard starting and smoke).
5. Deck and blade: clean packed grass from the underside; sharpen/replace the blade.
6. Drive system: if it won’t move, inspect the belt and linkage; a worn belt is a top cause.

If your symptom points to a worn or broken component, these model-matched parts are commonly involved:

Catching the simple issues early (fresh fuel, clean airflow, correct oil level, sharp blade) prevents hard starting, reduces engine strain, and protects the transmission and drive components from premature wear.

Last updated: February 2026

For a Craftsman 247374860 walk-behind mower, it’s cheaper to repair when the problem is routine wear (blade issues, belts, cables, fasteners). Replacement makes more sense when a major assembly (engine or transmission) fails or when the repair total approaches about half the cost of a comparable new mower.

Use this simple decision check before you buy parts:

• Repair if the mower starts reliably and you’re fixing a single wear item (belt, cable, wheel, chute, handle hardware).
• Repair if the deck and handle structure are solid (no major cracks, severe rust-through, or bent mounting points).
• Replace if the engine has low compression, heavy smoking, or repeated no-start issues after basic tune-up steps.
• Replace if the drive system needs multiple big-ticket parts (transmission plus wheels plus cables).
• Replace if you need a shop to do the work and labor pushes the total near 50% of a new mower.

These are typical, cost-effective fixes that restore performance quickly:

• Replace a worn self-propel belt like the ground drive belt 954-04282.
• Replace a stretched or sticking control cable like the throttle control cable 946-04850.
• Fix bagging and discharge issues with the side chute deflector 731-07486 or grass bag 964-05024.
• Restore drive and cut quality by replacing damaged wheels (for example, wheel assemblies).

A walk-behind mower like the Craftsman 247374860 is designed around replaceable wear parts. Keeping up with small repairs (belt tension, cable operation, discharge components) prevents bigger failures and keeps cut quality consistent.

• Confirm the correct procedure and adjustments in the owner's manual.
• Price out the parts you need and add estimated labor time (even for DIY).
• If self-propel is the issue, start with the belt and cable before considering a transmission.

Last updated: February 2026