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Is it cheaper to repair or replace a lawn mower?
For a Craftsman 247370370 walk-behind mower, it’s usually cheaper to repair when the fix is routine maintenance or a single worn part; replacement makes more sense when repair costs approach about half the price of a comparable new mower or the engine has major internal damage.
This model’s documentation points to a typical useful life of 7 years or about 140 operating hours, which is a practical benchmark when deciding whether to invest in repairs. For maintenance intervals and tune-up items, use the Craftsman 247370370 operator’s manual.
Repair is typically the better value when:
- The mower starts and runs, but needs a tune-up (spark plug, air filter, oil change)
- The cut quality is poor due to a dull or damaged blade
- The mower vibrates because the blade is loose or unbalanced
- The issue is fuel-related (stale gas, dirty carburetor) and not internal engine damage
- You have no recurring failures after the repair
Replace is typically the better value when:
- The engine has low compression, heavy smoking, or internal knocking
- The deck is rusted through or structurally damaged
- Multiple major systems need work at the same time (engine + wheels/height adjusters + controls)
- Repairs are frequent and downtime is becoming a problem
| Situation | Typical recommendation | Why |
|---|---|---|
| Basic maintenance or one common wear issue | Repair | Lowest cost, restores performance quickly |
| Several small issues at once | Repair if total is under ~50% of new mower cost | Bundling repairs can still be economical |
| Major engine failure | Replace (most cases) | Engine work often exceeds the mower’s value |
| Near or past expected useful life (7 years/140 hours) | Lean toward replace unless repair is minor | You’re more likely to see additional wear-out failures |
A walk-behind mower’s value is tied to safe, reliable operation. Spending on maintenance items (oil, air filter, spark plug, blade) usually pays back in easier starting, cleaner cutting, and longer engine life, while major engine repairs can quickly exceed the mower’s practical value.
Last updated: January 2026
What are the common problems with Craftsman lawn mowers?
On the Craftsman walk-behind mower model 247370370, the most common problems we see are no-start or hard-start conditions, rough running or surging, overheating, excessive vibration, and poor cutting or mulching performance. Many of these trace back to fuel quality, spark plug condition, airflow, or blade and deck issues; see the troubleshooting section in the 247370370 operator’s manual.
- Won’t start: blade control not held, stale fuel, disconnected spark plug boot, fouled spark plug, blocked fuel line
- Runs rough or surges: dirty air filter, stale fuel, venting gas cap issue, debris in fuel system
- Overheats: low engine oil level, restricted airflow from grass buildup around the engine
- Vibrates too much: loose or unbalanced blade, bent blade, damaged blade adapter
- Uneven cut or won’t mulch well: dull blade, wet or overgrown grass, cutting height set unevenly
- Verify you’re holding the blade control handle fully against the upper handle.
- Drain and refill with fresh unleaded gasoline (avoid old fuel).
- Inspect and replace the spark plug if it’s fouled; this model’s manual specifies Champion RJ2YXLE.
- Check and clean or replace the air filter.
- Tip the mower safely (air filter and carburetor side up) and inspect the blade and blade adapter for damage.
| Problem | Most common fix | What to inspect |
|---|---|---|
| Won’t start | Fresh fuel + spark plug service | Spark plug boot, fuel, plug condition |
| Rough running | Air filter and fuel system check | Air filter, gas cap vent, carburetor |
| Excess vibration | Blade service | Blade balance, blade bolt tightness, adapter |
| Poor mulching | Blade sharpen/replace + mowing technique | Blade edge, grass height/moisture |
Catching small issues early (stale fuel, dirty air filter, dull blade) prevents hard starting, engine strain, and deck damage. It also improves cut quality and reduces vibration that can loosen hardware over time.
For mowing and maintenance habits that prevent many of these issues, use pre-summer mower check: how’s it holding up?.
Last updated: January 2026
What year is my Craftsman mower serial number lookup?
For Craftsman model 247370370, the mower’s serial number format does not reliably encode the build year in a simple “MMDDYY” pattern; the year is typically identified by matching the serial number (and sometimes the engine numbers) to Craftsman/MTD production records. Use the 247370370 operator’s manual to confirm where the serial number label is located and which numbers to record.
On this Craftsman walk-behind mower, the model and serial information is recorded on the mower’s identification label; the engine also has its own model and type numbers.
- Record the mower model number (247370370) and serial number from the mower label
- Record the engine model information (Briggs & Stratton engine numbers are separate from the mower’s serial)
- Write down the numbers exactly as shown, including any letters
- Take a clear photo of the label in case characters are hard to read
Some online videos suggest the first digits of a serial number equal month/day/year. That pattern is not consistent across Craftsman walk-behind mowers, including model 247370370, so using it can give the wrong year.
| What you have | What it tells you | What to do next |
|---|---|---|
| Mower serial number | Identifies the unit in production records | Use it for a manufacturer date lookup |
| Engine model/type/code | Often includes an engine build date code | Use it to estimate engine build date |
| Purchase receipt | Confirms in-service date | Use as the most accurate “in use since” date |
Knowing the correct year helps us match the right parts (blade, blade adapter, wheels, control cable) and avoid ordering look-alike parts that do not fit your exact Craftsman 247370370 deck and handle configuration.
For parts matching, the model number 247370370 is usually more important than the mower’s build year.
- Use the model number to select diagrams and parts lists
- Use the serial number only when a parts list breaks by serial range
- Use engine numbers when ordering engine-specific parts (spark plug, air filter)
Last updated: January 2026
Where is the model number on a Craftsman self-propelled lawn mower?
For the Craftsman walk-behind mower model 247370370, the model and serial number are found on a label attached to the mower deck or frame (not under a seat). Because label placement can vary by production run, we use the 247370370 operator's manual to confirm what identifiers to record once you find the tag.
Look for a sticker or metal tag in these common walk-behind mower spots:
- On top of the steel deck near the rear discharge door opening
- On either side of the deck near a wheel or cutting-height adjuster
- On the rear of the deck near where the lower handle brackets bolt on
- Under the grass bag area on the deck surface (remove the bag to see)
- Near the engine mounting area on the deck (not on the plastic engine cover)
Record every identifier you see; it helps us match the correct parts list and diagrams.
| Identifier | What it helps with |
|---|---|
| Mower model number (247370370) | Matches the correct deck, handle, and blade system parts |
| Mower serial number | Helps distinguish production variations |
| Engine model/type/code (Briggs and Stratton) | Matches engine parts like spark plug and air filter |
Craftsman walk-behind mowers can look similar across model numbers, but small differences in the deck, blade adapter, or control cable routing can change which replacement parts fit.
- Clean the deck and rear frame area with a damp rag (avoid pressure washing labels)
- Use a flashlight at a low angle to read faded printing
- Check both sides of the deck and the rear discharge area again after removing the grass bag
Last updated: January 2026
