Owner’s manual
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How to find Craftsman model number?
On the Craftsman walk-behind mower model 917388955, the model and serial number are printed on a decal on the rear of the mower housing (back of the deck). Use that model number when ordering parts and checking specifications in the 917388955 owner's manual.
Where to look on the mower
Check these common spots on Craftsman walk-behind mowers, starting with the most likely location:
- Rear of the deck (rear mower housing), typically centered or slightly offset
- Back edge of the deck between the lower handle mounts
- Near the rear discharge door area (if equipped)
- On the side of the deck near a wheel bracket (less common)
What the label looks like
Most decals include both identifiers and may be formatted with punctuation.
| What you may see | What it means | Example format |
|---|---|---|
| Model number | Identifies the mower design | 917.388955 or 917388955 |
| Serial number | Identifies your exact unit | A longer letter/number code |
| Date of purchase (written by owner) | Helps with records | Handwritten |
Tips to read the decal successfully
If the decal is dirty or faded, these steps usually make it readable again:
- Brush off dry grass and debris first
- Wipe with a damp rag and mild soap, then dry
- Use a flashlight at a low angle to highlight faint printing
- Take a close-up photo and zoom in to read small characters
Why it matters
The model number ensures you get the correct Craftsman parts for your exact deck and handle setup (for example, the correct upper handle 532194179 or lawn mower zone control cable 532183281). The serial number helps confirm production variations when parts changed during a run.
Last updated: January 2026
Should I use 87 or 91 gas for lawn mower?
For the Craftsman walk-behind mower model 917388955, we recommend using fresh 87-octane unleaded gasoline for normal operation. Higher octane (like 91) does not add power in small mower engines; fuel freshness and clean storage matter more for reliable starting and smooth running (see the 917388955 owner's manual).
What to use (and what to avoid)
- Use 87 octane unleaded from a clean, non-rusting gas can.
- Buy fuel in small amounts so it stays fresh.
- Avoid using old fuel; the manual lists stale fuel and water in fuel as common no-start causes.
- Keep gasoline off rubber parts like tires.
- Never store the mower indoors with gasoline in the tank where fumes could reach a flame or spark.
Quick comparison: 87 vs 91 octane
| Fuel choice | Best for | What you will notice |
|---|---|---|
| 87 octane (regular) | Everyday mowing | Normal power and starting when fuel is fresh |
| 91 octane (premium) | Not required for this mower | Typically no performance benefit |
If your mower is hard to start after fueling
The manual’s troubleshooting points to fuel quality and basic ignition items first:
- Drain and refill with fresh, clean gasoline if fuel is old.
- Check the air filter; clean or replace if dirty.
- Make sure the spark plug wire is firmly connected.
- If the rope is difficult to pull, review lawn mower pull cord stuck for common causes.
Why it matters
Most “bad gas” mower problems are really stale fuel, contaminated fuel, or poor storage practices, not octane rating. Using fresh 87 octane and storing fuel correctly helps prevent no-start issues and reduces carburetor problems.
Last updated: January 2026
What model number is the Craftsman 917388955?
The model number for this Craftsman walk-behind gas lawn mower is 917.388955 (often written without the dot as 917388955). You’ll see it printed on the mower’s model label and on the cover page of the 917388955 owner's manual.
Where to find the model number on the mower
We recommend checking the mower’s model label first, since it matches parts diagrams and replacement parts.
- Look on the rear of the deck near the discharge area
- Check around the handle mounting brackets
- Look near the engine mounting area on the deck
- Wipe off grass and dirt; the label can be hard to read when dirty
- Write the full model number exactly as shown (including dots if present)
Why the model number matters for parts
Craftsman mowers can look similar across years, but small changes affect fit. Using 917388955 helps match the correct blade, blade adapter, wheels, and control cables.
| What you’re doing | What to use | Example for this model |
|---|---|---|
| Ordering replacement parts | Model number | 917388955 |
| Confirming diagrams and key numbers | Model number from manual | 917.388955 |
| Replacing common wear items | Exact part ID match | Husqvarna lawn mower 21-in deck 3-in-1 blade 532189028 |
Quick cross-check (common confusion)
Some online listings use marketing names (like “M210”) that can refer to multiple builds. For parts and repairs, we use the mower’s 917388955 model number shown on the product label and in the manual.
Why it matters
The correct model number prevents ordering the wrong blade, discharge guard, or zone control cable, and it keeps maintenance and troubleshooting steps aligned with your mower’s exact configuration.
Last updated: January 2026
