Owner’s manual
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Does it matter what gas I put in my lawn mower?
Yes, it matters. For your Craftsman walk-behind mower model 917387580, use fresh, clean unleaded gasoline; the wrong fuel (or old, contaminated fuel) commonly causes hard starting, rough running, and stalling. Follow the fuel guidance and storage steps in the 917387580 owner's manual.
What fuel to use (and what to avoid)
Most walk-behind mower engines are designed to run best on regular unleaded gasoline.
- Use fresh, clean unleaded gasoline from a clean fuel can
- Avoid stale fuel (gas left sitting for weeks or months)
- Avoid fuel contaminated with water, rust, or dirt
- Do not store gasoline from one season to the next
- If your gas can is rusting, replace it to prevent debris getting into the tank
Quick troubleshooting: when gas is the problem
The manual’s troubleshooting chart points to fuel issues as a top cause of “does not start.” If your mower won’t start or runs poorly, check these fuel-related items first:
- Fuel tank is empty
- Fuel is stale
- Water got into the fuel
- Dirt or rust entered the fuel system
- Primer use on a cold engine is inconsistent (if equipped)
What to do if you suspect bad gas
If the mower has been sitting or the fuel smells sour/varnish-like, treat it as stale.
| Situation | Best next step |
|---|---|
| Fuel is older from last season | Drain/empty tank and refill with fresh gasoline |
| Gas can shows rust or debris | Replace the can, then refill with clean fuel |
| Engine ran in heavy grass and now runs rough | Check fuel freshness, then clean underside of deck (after disconnecting spark plug wire) |
Why it matters
Fuel quality directly affects starting and combustion. Stale or contaminated gasoline is specifically called out in the mower’s troubleshooting guidance because it can prevent starting and create ongoing performance problems.
Last updated: January 2026
What model number is the Craftsman 917387580?
The model number for this Craftsman walk-behind mower is 917.387580 (often written without the dot as 917387580). You can confirm it on the model tag and in the 917387580 owner's manual.
Where to find the model number on the mower
Look in these common spots on Craftsman walk-behind mowers:
- On a label or plate on the rear of the deck near the discharge chute
- On the deck surface near the engine mounting area
- Near the handle mounting brackets
- In the paperwork that came with the mower (manual and warranty pages)
Model number vs. engine model number (common mix-up)
This mower has a Craftsman mower model number and a separate Briggs and Stratton engine model number.
| What you’re identifying | Example for this mower | Used for |
|---|---|---|
| Mower model number | 917.387580 (917387580) | Ordering deck, handle, wheel, and blade-related parts |
| Engine model number | 123K02-0312-E1 | Ordering engine-specific parts like carburetor or recoil starter components |
Why it matters
Using the correct model number helps us match the right parts diagrams and hardware for your exact deck and handle setup. For example, the blade and blade mounting parts can vary by model even when the engine is similar.
Parts examples tied to the mower model
- Lawn mower blade 532406713 (blade selection depends on the mower deck)
- Lawn mower blade adapter 532418373 (must match the blade mounting pattern)
- Walk-behind lawn mower engine cable 532176556 (control cable length and ends vary)
Last updated: January 2026
What model number is the Craftsman 917387580?
The model number for this Craftsman walk-behind lawn mower is 917.387580 (often written without the dot as 917387580). You’ll see it printed on the mower’s model tag and on the cover page of the 917387580 owner's manual.
Where to find the model number on the mower
Look for the model tag in common walk-behind mower locations:
- On the rear of the mower deck near the discharge area
- On the top of the deck near the engine mounting area
- Near the handle mounting brackets
- On a label that also lists engine information (such as Briggs and Stratton details)
Why the dot matters (917.387580 vs 917387580)
Both formats refer to the same mower; the dot is just a formatting style used on some labels and manuals.
| You might see it as | What it means | When it’s used |
|---|---|---|
| 917.387580 | Same model number | Common in printed manuals and some ID tags |
| 917387580 | Same model number | Common on parts sites and search fields |
Related identifiers you may also see
This mower’s documentation also references key specs and engine details that help confirm you have the right unit:
- Craftsman rotary lawn mower model number: 917.387580
- Deck size: 22-inch (side discharge)
- Engine family: Briggs and Stratton
- Engine model number shown in the manual parts breakdown: 123K02-0312-E1
Why it matters
Using the exact model number helps us match the correct parts diagrams and hardware (blade, blade adapter, control cable, wheels) so you get parts that fit and install correctly.
Last updated: January 2026
Where to find model number on Craftsman lawn mower?
On the Craftsman walk-behind mower model 917387580, we find the model and serial numbers on a decal on the rear of the lawn mower housing. Use that decal information when ordering parts like a blade adapter, control cable, or mower blade; it ensures the correct fit.
Where to look on model 917387580
Check these common spots first:
- Rear of the mower deck (housing), typically facing the operator position
- Near the back wheels on the deck area
- On the deck surface close to the engine mounting area
- On a label that includes both the model number and serial number
If the decal is dirty or faded, wipe it with a damp rag and mild soap, then dry it and re-check.
What to write down (and why)
Record the key details exactly as shown on the decal:
- Model number (for this mower: 917387580)
- Serial number
- Date of purchase (helpful for maintenance records)
- Engine model information (useful when buying engine-specific parts)
Quick reference table
| Item on decal | What it’s used for |
|---|---|
| Model number | Matching the correct parts diagrams and part lists |
| Serial number | Identifying production variations within the same model |
| Engine model | Selecting engine tune-up parts (spark plug, air filter, carb parts) |
Why it matters
Many Craftsman walk-behind mowers share similar decks and handles, but small changes (blade adapter style, control cable length, wheel hardware) can vary by model and serial range. Using the decal info helps us match parts accurately, such as the lawn mower blade 532406713 or the walk-behind lawn mower engine cable 532176556.
For diagrams and the exact label location callouts, use the 917387580 owner's manual.
Last updated: January 2026
