Owner’s manual
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Should I use 87 or 91 gas for lawn mower?
For the Craftsman lawn mower model 917374150, use regular unleaded 87-octane gasoline for normal operation. Higher octane (like 91) is not required for performance; the most important thing is using clean, fresh fuel and storing it correctly per the 917374150 owner's manual.
What to use (and what to avoid)
- Use fresh, regular unleaded 87 octane.
- Avoid old gas (stale fuel is a top cause of hard starting and rough running).
- Avoid fuel contaminated with water or dirt.
- If your area offers ethanol-free fuel, it can help reduce storage issues, but 87 octane is still the right octane level.
- Use a fuel stabilizer when fuel will sit (the manual lists stabilizer as a recommended accessory).
Quick comparison
| Fuel choice | Works in 917374150? | When it makes sense | What it helps most |
|---|---|---|---|
| 87 octane regular | Yes | Everyday mowing | Reliable starting and normal power |
| 91 octane premium | Yes, but unnecessary | Only if it is the freshest fuel available | Not octane; freshness and cleanliness |
Why it matters
Octane is mainly about preventing knock in high-compression engines. Most walk-behind mower engines are designed to run correctly on regular fuel, so paying for premium usually does not improve power, starting, or engine life. Fuel quality and storage habits matter more than octane.
Fuel habits that prevent common problems
- Buy gas in small amounts so you use it up quickly.
- Add stabilizer if the mower will sit for more than a short period.
- Keep the gas can sealed and stored in a cool, dry place.
- If the mower starts running poorly, check maintenance items like the spark plug and air filter (the manual calls for spark plug replacement at the start of each season or every 100 hours).
Last updated: January 2026
What model number is the Craftsman 917374150?
The model number for this Craftsman walk-behind lawn mower is 917.374150 (often written without the dot as 917374150). You’ll see it printed on the mower’s model tag and on the cover page of the 917374150 owner's manual.
Where to find the model number on the mower
Look for a model and serial number label on the mower body. Common locations include:
- On the rear of the deck near the discharge opening
- On the back panel near the rear wheels
- Near the handle mounting brackets
- Under the rear door area (bagging opening)
Why the dot matters (917.374150 vs 917374150)
Both formats refer to the same mower; the dot is just a formatting style used in some manuals and parts lists.
| You might see it as | What it means | When it’s used |
|---|---|---|
| 917.374150 | Same model number | Owner’s manual, diagrams |
| 917374150 | Same model number | Online parts lookup, model pages |
Tips to make sure you’re matching the right parts
When ordering parts for a Craftsman mower, we recommend confirming the full model number from the label because small differences can change the blade, drive system, or handle parts.
- Match the model number exactly: 917374150
- Use the mower’s product label, not the engine label (Briggs & Stratton numbers are different)
- If you’re replacing cutting parts, confirm deck size (this model uses a 22-inch blade)
- If you’re working on the self-propel system, verify drive components like the lawn mower drive control cable 588479201
Why it matters
The model number is the key to getting the correct diagrams, hardware, and replacement parts (blade, drive cable, wheels, and transmission). Using the exact model number prevents ordering parts that do not fit.
Last updated: January 2026
What year is Craftsman Model 917374150?
Craftsman model 917374150 is a model number (not a date code), so it does not directly tell the year. To identify the year, we use the mower’s product label date code or the engine identification details shown in the 917374150 owner's manual.
Where to find the year on the mower
Look for a product label on the mower (commonly on the rear of the deck, near the handle brackets, or on the housing). The label typically includes a serial number or date code.
Common places to check:
- Rear of the mower deck (near the discharge opening)
- Under the rear door or near the rear skirt
- Handle bracket area
- Engine shroud label (Briggs & Stratton engine tag)
What the manual confirms about this model
The documentation identifies this as a Craftsman rotary lawn mower, power-propelled, 22-inch multi-cut, using a Briggs & Stratton 675 Series engine (model family shown as 126L02-xxxx in the parts listing).
Quick reference table
| Item | What it tells you | Where to look |
|---|---|---|
| Mower model number | Identifies the mower family and parts | On the mower product label |
| Serial/date code | Indicates build date or production period | On the mower product label |
| Engine model/type/code | Helps date the engine | On the Briggs & Stratton engine shroud/tag |
Why it matters
Knowing the year helps us match the correct parts and diagrams for wear items like the blade, drive system, and rear door components. For example, this model uses a 22-inch blade listed as lawn mower 22-in deck 3-in-1 blade 532420463.
Last updated: January 2026
