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How old is my mower by serial number?
On Craftsman gas walk-behind mower model 917378430, the serial number is printed on a decal attached to the rear of the lawn mower housing. That serial number identifies your mower, but the build date is not encoded in a single universal format; we use the serial number to match the correct parts and documentation for your exact unit. See the 917378430 owner's manual for the serial number location and recording details.
We look for the decal on the mower housing (rear of the deck). Once you find it, write down the full model and serial number exactly as shown.
- Check the rear of the lawn mower housing for the decal
- Record the model number (917378430) and the serial number
- Also record the date of purchase (helpful for maintenance history)
- Clean grass and dirt off the rear deck area so the decal is readable
- Take a clear photo of the decal before it fades further
Many outdoor power equipment serial numbers include a date code, but the position and format vary by manufacturer and engine supplier. Use these common patterns as a quick check.
| Common date-code pattern | What it usually means | Example (illustration only) |
|---|---|---|
| YYMMDD | Year, month, day | 230615 = June 15, 2023 |
| MMDDYY | Month, day, year | 061523 = June 15, 2023 |
| YYWW | Year and production week | 2342 = week 42 of 2023 |
If the serial number does not clearly show a date code, we narrow the timeframe by matching the mower configuration and key wear items.
- Compare your mower to the parts diagrams in the 917378430 owner's manual
- If the mower is self-propelled and slips or will not drive, check the ground drive belt and pulleys; the lawn mower wont move troubleshooting video motion drive failure guide helps confirm symptoms
- If you are doing a tune-up, confirm the correct maintenance specs (oil type, spark plug gap, blade bolt torque) in the manual
Knowing the approximate age helps us recommend the right maintenance schedule and the most likely wear parts (blade adapter, drive belt, control cable, wheels) for your Craftsman 917378430.
Last updated: January 2026
What are the most common issues with 917378430?
The most common issues we see on the Craftsman 917378430 gas walk-behind lawn mower involve starting and running problems (fuel or ignition related), self-propel/drive issues (belt or gears), and uneven cutting (blade mounting or height adjustment). Your 917378430 owner's manual helps confirm the correct adjustments and maintenance intervals.
- Won’t start or starts then dies: stale fuel, dirty carburetor passages, fouled spark plug, clogged air filter
- Runs rough or surges: partially clogged carburetor, air leak, old fuel, restricted fuel flow
- Self-propel won’t pull or slips: worn or stretched drive belt, damaged drive gears, loose drive cable adjustment
- Uneven cut or vibration: bent blade, loose blade hardware, worn blade adapter, debris packed under deck
- Hard to change cutting height: seized adjusters, worn knobs/springs, debris in height mechanism
- Fuel: drain old gas; refill with fresh fuel (use the correct octane per the manual).
- Spark: inspect/replace spark plug; confirm the plug wire is firmly seated.
- Airflow: clean or replace the air filter; clear grass from cooling fins and under the deck.
- Drive system (self-propel models): inspect belt condition and tension; check cable free play.
- Cutting system: check blade tightness and condition; inspect the blade mounting parts.
| Symptom | Part to inspect | What it does |
|---|---|---|
| Self-propel slips or won’t move | Lawn mower ground drive belt, 3/8 x 32-1/2-in 532175436 | Transfers power to the drive system |
| Vibration or poor cut quality | Lawn mower blade adapter 581547901 | Centers and drives the blade on the shaft |
| Height won’t hold or adjust smoothly | Husqvarna lawn mower height adjuster knob 532701037 | Helps set and retain cutting height |
Catching belt wear, blade mounting looseness, or fuel-related problems early prevents bigger failures like stripped drive gears, damaged pulleys, and excessive engine wear.
Last updated: March 2026
What model number is the Craftsman 917378430?
The model number is 917.378430 (often written without the dot as 917378430) for this Craftsman gas walk-behind lawn mower. You can confirm it on the model tag and in the Craftsman 917378430 owner's manual, where it appears on the cover page.
We recommend checking these common locations before ordering parts like a control cable or wheel components:
- On the rear of the mower deck near the discharge area
- On the deck top surface near the engine mounting area
- On a label near the handle mounting brackets
- In the manual cover and parts diagrams
Both formats refer to the same mower; the dot is just a formatting style used on some labels and manuals.
| You see this | It means | Use it for |
|---|---|---|
| 917.378430 | Same model number | Reading the model tag or manual |
| 917378430 | Same model number | Searching parts online and ordering |
To avoid getting the wrong Craftsman walk-behind mower parts, match these details:
- Model number: 917378430
- Product type: gas walk-behind lawn mower
- Part description and diagram location (handle, drive, deck, wheels)
- Part identifiers when applicable (for example, control cable 532168552)
Craftsman model numbers can look similar across different mower builds. Using the exact model number ensures the parts list and diagrams match your mower’s handle controls, drive system, and deck hardware.
Last updated: January 2026
