Owner’s manual
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Should I use 87 or 91 gas for lawn mower?
For the Craftsman 917375010 gas walk-behind mower, we recommend using fresh regular unleaded gasoline (87 octane) for normal operation. Higher octane (like 91) does not add power or improve reliability in a mower engine; fuel freshness and proper storage matter more (see the 917375010 owner's manual).
What to use (and what to avoid)
- Use 87 octane regular unleaded from a clean, approved gas can.
- Use fresh fuel; old fuel is a common no-start cause.
- Avoid fuel that smells sour or looks dark (stale fuel).
- Avoid gas contaminated with water or dirt.
- Do not “upgrade” to 91 octane expecting better performance; it typically provides no benefit in small engines.
Quick comparison: 87 vs 91 for a walk-behind mower
| Fuel choice | Best for | What you’ll notice |
|---|---|---|
| 87 octane (regular) | Everyday mowing | Normal starting and power when fuel is fresh |
| 91 octane (premium) | Not required for this mower | Usually no performance gain; costs more |
Why it matters
Most mower problems blamed on “bad gas” are really stale fuel, water in fuel, or dirty storage containers. The manual troubleshooting list specifically calls out stale fuel and water in fuel as reasons the mower may not start, so focusing on fuel quality and storage prevents downtime.
Fuel handling tips that prevent no-start issues
- Empty and replace old fuel if the mower has been sitting.
- Store gasoline in a clean, non-rusting container.
- Keep the cap tight to reduce moisture entry.
- If you store fuel for weeks, use stabilizer and rotate stock.
- If the mower won’t start after refueling, check basics like the air filter and spark plug connection per the 917375010 owner's manual.
Last updated: January 2026
What are the most common issues with 917375010?
The most common issues we see on the Craftsman 917375010 walk-behind mower involve self-propel drive problems, uneven cutting, and wheel or handle hardware loosening over time. These symptoms usually trace back to normal wear items like the drive belt, drive components, blade mounting parts, and fasteners; use the 917375010 owner's manual for model-specific adjustments and safety steps.
Common problems and what they usually mean
- Mower will not self-propel or slips under load: worn or stretched drive belt, worn drive pawls, or transmission wear.
- Uneven cut or vibration: bent or dull blade, damaged blade adapter, or loose blade hardware.
- Wheels wobble or do not track straight: worn wheel, missing dust cover, or loose axle hardware.
- Handle feels loose or drive control is hard to hold: loose handle knobs, worn control bar linkage, or cable issues.
- Discharge guard not closing: worn hinge area or damaged guard.
Parts on this model that commonly fix these symptoms
If your symptoms match, these are frequent replacement items for Craftsman 917375010:
- Belt 532157769 (self-propel drive slipping or not engaging)
- Drive pawl 532404845 (drive wheel grabs intermittently)
- Lawn mower transmission assembly 532415226 (drive system worn or noisy)
- Lawn mower mulching blade 532406707 and lawn mower blade adapter 532421176 (vibration, poor cut)
- Lawn mower drive wheel 532403111 or lawn mower wheel 532433121 (wobble, traction issues)
Quick checks we recommend before ordering parts
- Tip the mower safely (spark plug wire disconnected) and inspect the blade and adapter for damage.
- Check the drive belt for glazing, cracking, or slack.
- Confirm the drive control bar fully engages and the cable is not kinked or stretched.
- Tighten wheel and handle fasteners; replace worn nuts/washers if they will not stay tight.
Symptom-to-part starting points
| Symptom | Most likely area | Good first part to inspect |
|---|---|---|
| No self-propel | Drive system | Belt 532157769 |
| Vibration | Blade mount | Lawn mower blade adapter 532421176 |
| Wheel wobble | Wheel/hub | Lawn mower wheel 532433121 |
| Intermittent drive | Drive wheel internals | Drive pawl 532404845 |
Why it matters
Catching drive and blade-mount wear early helps prevent bigger failures (like stripped hubs or damaged crankshaft components) and keeps cutting performance consistent.
Last updated: March 2026
What model number is the Craftsman 917375010?
The model number is 917.375010; it is also commonly written without the dot as 917375010. This is the correct Craftsman walk-behind mower model identifier to use when matching diagrams, manuals, and replacement parts; see the 917375010 owner's manual.
Where to find the model number on the mower
Check the model and serial tag in these common walk-behind mower locations:
- Rear of the mower deck near the discharge area
- Top of the deck near the engine mounting area
- Handle mounting bracket area
- Near the wheel height adjuster
How we confirm the model number
The model number appears in multiple places for this unit, including the manual cover and the illustrated parts list headers.
| Source | What it should show |
|---|---|
| Model/serial tag on mower | 917.375010 (or 917375010) |
| Manual cover | 917.375010 |
| Parts list header | 917.375010 |
Parts examples that match this model
Once you confirm 917375010, you can match common wear items by diagram callout and part ID, such as:
- Lawn mower mulching blade 532406707 (blade replacement)
- Belt 532157769 (drive belt kit)
- Lawn mower drive control cable 532194653 (self-propel control)
Why it matters
Using the exact model number prevents ordering the wrong blade, belt, wheels, or drive components; Craftsman walk-behind mowers can look similar across model series, but parts and hardware often differ.
Last updated: January 2026
