Owner’s manual
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Should I use 87 or 91 gas for lawn mower?
For the Craftsman 917376081 gas walk-behind mower, we recommend using fresh, clean regular unleaded gasoline (typically 87 octane). Using 91 octane does not improve performance in a mower engine designed for regular fuel; fuel freshness and proper storage matter far more.
What to use (and what to avoid)
- Use fresh, clean unleaded gasoline; buy only what you will use in about 30 days.
- 87 octane is the right choice for most walk-behind mower engines.
- Avoid old fuel; the manual lists stale fuel and water in fuel as common no-start causes.
- Keep the gas can clean and replace it if it starts to rust (rust and dirt can cause problems).
- If the mower will sit, use a fuel stabilizer and follow the storage steps in the 917376081 owner's manual.
Quick comparison: 87 vs 91 for a walk-behind mower
| Fuel choice | What you get | Best use case |
|---|---|---|
| 87 octane (regular) | Normal starting and power for mower engines | Everyday mowing |
| 91 octane (premium) | No meaningful benefit if the engine is designed for regular | Only if required by the engine manufacturer (uncommon for this type) |
If your mower is hard to start after fueling
We see fuel issues show up as “won't start” symptoms. Check these items first:
- Drain and refill with fresh gasoline if fuel is old.
- Inspect the fuel for water contamination.
- Check the air filter and spark plug condition.
- Confirm the spark plug wire is firmly connected.
- If equipped, make sure the fuel valve lever is in the ON position.
Why it matters
Using the correct fuel is less about octane and more about preventing varnish, corrosion, and starting problems. Fresh gasoline, a clean gas can, and proper off-season storage reduce no-start troubleshooting and help protect the carburetor and fuel system.
Last updated: January 2026
What model number is the Craftsman 917376081?
The model number for this Craftsman walk-behind gas lawn mower is 917.376081 (often written without the dot as 917376081). You can confirm it on the model tag and in the 917376081 owner's manual.
Where to find the model number on the mower
Look in these common spots first; the model tag is usually a sticker or metal plate:
- Rear of the deck near the discharge chute
- Top of the deck behind the engine
- Near the handle mounting brackets
- Under the rear door (bagging area)
- On the frame near the height adjuster
How to confirm you have the right number
Use the model number exactly as shown on the tag when ordering parts (numbers and punctuation matter).
| What you see | What it means | What to use for parts lookup |
|---|---|---|
| 917.376081 | Full model number with dot | 917.376081 or 917376081 |
| 917376081 | Same model number without dot | 917376081 |
Why it matters
The model number ensures we match the correct parts and diagrams for your exact mower configuration (deck, drive system, and handle controls). For example, parts like the lawn mower engine control cable 532183567 are model-specific and can vary by series.
Last updated: January 2026
Where is Craftsman's model number?
On the Craftsman walk-behind mower model 917376081, the model and serial numbers are printed on a decal on the rear of the lawn mower housing. Use that decal information when ordering parts like a blade, drive wheel, or control cable. See the 917376081 owner's manual for the exact decal location illustration.
How to find it quickly
- Shut the engine off and let the muffler cool completely.
- Stand behind the mower at the handle.
- Look at the rear of the mower deck (housing) for a sticker/decal.
- Write down both the model number and serial number.
- Record the date of purchase if you still have it (helpful for service and maintenance tracking).
What you should see on the decal
Most Craftsman decals list these fields:
| Item on decal | What it’s used for |
|---|---|
| Model number (example: 917.376081) | Matching the correct parts diagrams and assemblies |
| Serial number | Identifying the exact production run/version |
| Date of purchase (your record) | Maintenance history and service reference |
Why it matters
Craftsman walk-behind mowers can look similar across multiple model numbers, but parts can differ (blade, drive system, wheels, and control cables). Using the decal information helps us match the correct parts for your exact mower.
Last updated: January 2026
