Owner’s manual
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How to find Craftsman model number?
On the Craftsman walk-behind mower model 917377011, the model number is typically printed on a product label on the mower deck; check the rear area of the deck near the lower handle mounting points. Confirm the full number exactly as shown in the 917377011 owner's manual.
Where to look on the mower
Check these common label locations first (clean the area if needed):
- Back of the mower deck, between or near the lower handle mounts
- Rear of the deck, just above the discharge opening or rear door area
- Side of the deck near the rear wheel height adjuster
- Under the rear flap or grass bag door area (if equipped)
Tips to read the label correctly
Dirt, grass residue, and sun fading can make the sticker hard to read. These steps usually help:
- Wipe the label with a damp rag and mild soap; avoid harsh solvents
- Use a flashlight at an angle to make faint printing stand out
- Take a close-up photo and zoom in to read worn characters
- Write down the full model number and any serial number on the same label
Model number vs. serial number (quick guide)
| Item | What it’s used for | What to record |
|---|---|---|
| Model number | Identifies the exact mower design and parts breakdown | Full model (example: 917377011) |
| Serial number | Identifies the production unit and date range | Full serial exactly as printed |
Why it matters
We use the model number to match the correct Craftsman parts diagrams and ensure you get the right drive components, wheels, blade adapter, and hardware for your exact deck and transmission setup.
Last updated: January 2026
Should I use 87 or 91 gas for lawn mower?
For Craftsman lawn mower model 917377011, use fresh, clean, regular unleaded gasoline with a minimum of 87 octane. Using 91 octane is not required for normal operation; fuel freshness and proper storage matter more than higher octane for this mower (see the 917377011 owner's manual).
What fuel to use (and what to avoid)
- Use regular unleaded gasoline (87 octane minimum).
- Buy fuel you can use within 30 days to keep it fresh.
- Do not mix oil with gasoline.
- Avoid old fuel and contaminated fuel (water, dirt, rust).
- Be cautious with alcohol-blended fuels (ethanol/methanol); they can attract moisture during storage.
When higher octane helps (and when it does not)
Higher octane does not add power in a mower designed for regular fuel. It mainly helps prevent knock in high-compression engines.
| Fuel choice | Works in 917377011? | Best use case |
|---|---|---|
| 87 octane (regular) | Yes (recommended minimum) | Everyday mowing |
| 89 to 91 octane | Yes, but unnecessary | Only if it is the freshest fuel available |
| Stale/old gas | No | Causes hard starting and rough running |
If the mower runs poorly after fueling
If you have hard starting, surging, or stalling, fuel quality is a top suspect.
- Drain the tank and refill with fresh 87+ octane fuel
- Check the air filter and spark plug condition
- Inspect for water in fuel (milky look, phase separation)
- If the engine won’t start and the blade area is involved, check for a loose blade or damaged adapter
If you’re servicing the blade area, a worn adapter can cause vibration and starting issues; match parts by model and diagram, such as the lawn mower blade adapter 532186766.
Why it matters
Using the correct fuel (87+ octane) and keeping it fresh helps prevent carburetor varnish, corrosion from moisture, and no-start problems after storage. For seasonal storage steps, follow the fuel system guidance in the 917377011 owner's manual.
Last updated: January 2026
What model number is the Craftsman 917377011?
The model number for this Craftsman walk-behind gas lawn mower is 917.377011 (often written without the dot as 917377011). You can confirm it on the mower’s model tag and in the 917377011 owner's manual.
Where to find the model number on the mower
We recommend checking these common locations first:
- On the rear of the deck near the discharge opening or rear door
- On the handle bracket area near the height adjusters
- Near the engine mounting area on the deck
- On a sticker or metal tag that also lists serial information
How to confirm you have the right model (fast checks)
Use these quick identifiers to match the mower to the manual and parts diagrams:
- Model format: 917.377011 (or 917377011)
- Mower type: rotary lawn mower, power-propelled
- Deck size: 21-inch multi-cut
- Engine family shown in manual: 675 Series Briggs & Stratton
Model number vs. product name (what each means)
| Item | What it tells you | Example for this mower |
|---|---|---|
| Model number | The exact mower version used to match parts | 917.377011 |
| Brand | Who sold/marketed the mower | Craftsman |
| Description | General features, not unique identifiers | 21" multi-cut, power-propelled |
Why it matters
We use the model number to match the correct parts list and diagrams for your mower. Even small model changes can affect items like the drive control assembly, wheels, blade adapter, and hardware.
Last updated: January 2026
