Owner’s manual
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Should I use 87 or 91 gas for lawn mower?
For the Craftsman rotary lawn mower model 917376582, we recommend using fresh, clean regular unleaded gasoline (87 octane). Higher octane (like 91) is not required for normal mowing and typically does not improve performance in small mower engines.
What fuel to use (and what to avoid)
Use fuel that helps the engine start easily and run cleanly.
- Use 87 octane regular unleaded gasoline
- Use fresh fuel; don’t keep gas from one season to the next
- Keep fuel clean and dry; water or dirt in fuel can cause no-start and rough-running issues
- Avoid using gas from a rusty gas can (rust and debris can contaminate fuel)
- If you store fuel, use a stabilizer and rotate it often (fresh is best)
Quick comparison: 87 vs 91 for this mower
| Fuel choice | Works in model 917376582? | Best use case | What you’ll notice |
|---|---|---|---|
| 87 octane (regular) | Yes | Everyday mowing | Normal power and starting |
| 91 octane (premium) | Yes, but unnecessary | Only if it’s the only fresh fuel available | Usually no performance gain |
If the mower won’t start after fueling
Stale or contaminated fuel is a common cause of a no-start condition.
- Drain old fuel and refill with fresh, clean gasoline
- Check the air filter for heavy dirt buildup
- Make sure the spark plug wire is firmly connected
- Inspect for water in fuel (often shows up after long storage)
- Review the fuel and starting steps in the 917376582 owner's manual
Why it matters
Using the right fuel (and keeping it fresh) prevents hard starting, surging, and carburetor problems. The manual also warns against storing the mower indoors with gasoline in the tank where fumes could reach an ignition source, so good fuel habits also support safer storage.
Last updated: January 2026
What is the best walk behind a gas mower?
For most yards, the “best” gas walk-behind mower is the one that matches your lawn size and terrain, starts reliably, and cuts cleanly without clogging. Your Craftsman model 917376582 is a rotary, self-propelled style mower; use the 917376582 owner's manual to confirm features and operating setup for your exact unit.
What to look for in the best gas walk-behind mower
We recommend prioritizing these factors because they directly affect cut quality, ease of use, and maintenance:
- Deck size and blade system: Most walk-behind mowers are 21 to 22 inches; a sharp blade improves cut quality and mulching.
- Drive type: Self-propelled is best for slopes or larger yards; push mowers fit smaller, flatter lawns.
- Cut options: Mulch, bag, and side discharge flexibility helps with seasonal conditions.
- Height adjustment range: More positions make it easier to follow the “top one-third” cutting rule.
- Serviceability: Easy access to the air filter, spark plug, and blade hardware saves time.
How your Craftsman 917376582 fits the “best” criteria
Your manual describes key features typical of a strong all-around gas mower: an operator presence control bar (engine stops when released), a drive control lever for self-propelled forward motion, and a mulcher door for switching between mulching and discharge or bagging. These are the same features many homeowners look for when choosing a “best” walk-behind mower.
| Need | Best match | Why |
|---|---|---|
| Flat, small yard | Push mower | Lower cost, simpler drive system |
| Slopes or larger yard | Self-propelled mower | Less fatigue, steadier pace |
| Cleaner lawn appearance | Bagging capable mower | Reduces visible clippings |
| Low-fuss fertilizing | Mulching mower | Re-cuts clippings to feed turf |
Quick tips to get “best” performance from this mower
These steps align with the operating guidance in the manual and common mower best practices:
- Mow only in daylight or good artificial light.
- Clear the yard of rocks, wire, sticks, and other debris before mowing.
- Avoid mowing wet grass to reduce clumping and improve mulching.
- Set cutting height so you remove only the top one-third of the grass.
- Keep the underside of the mower housing clean to prevent buildup and poor airflow.
Why it matters
The “best” mower is the one that cuts safely and consistently for your conditions. A sharp blade, correct cutting height, and clean deck reduce engine strain, improve mulching, and help your lawn recover faster.
Last updated: January 2026
What model number is the Craftsman 917376582?
The model number for this Craftsman walk-behind rotary lawn mower is 917.376582 (often written without the dot as 917376582). You’ll see it printed on the mower’s model tag and on the cover page of the 917.376582 owner's manual.
Where to confirm the model number
Use these quick checks to match your mower to the correct parts list and diagrams:
- Check the model tag/label on the mower deck or rear housing
- Match the number to the manual cover: Model No. 917.376582
- Use the full model number when ordering parts like a blade, wheel, or drive belt
- If your tag is dirty or faded, clean it gently and re-check the digits
Why the dot matters (917.376582 vs 917376582)
Both formats refer to the same mower; the dot is a formatting style used in many Craftsman manuals.
| You might see it as | What it means | When it’s used |
|---|---|---|
| 917.376582 | Same model number | Common in printed manuals and decals |
| 917376582 | Same model number | Common in online parts lookups |
Why it matters for parts and repairs
Using the exact model number helps us show the correct exploded-view diagrams and ensures parts like the lawn mower blade, drive control cable, and drive belt match your mower’s build.
If you’re replacing common wear items, confirm the model first, then match the part by description and location in the diagrams (for example, the lawn mower blade 532406713).
Last updated: January 2026
