Owner’s manual
View engine
How old is my mower by serial number?
For Craftsman walk-behind mower model 917376401, the serial number helps identify the production run, but the most reliable way to pin down the mower’s age is to match the serial number on the rear housing decal to the model’s documentation and your purchase date records. Use the 917376401 owner's manual to confirm where to find the serial decal and what to record.
Where to find the serial number on this mower
On model 917376401, the manual notes the model and serial numbers are on a decal on the rear of the lawn mower housing.
- Look at the rear of the mower deck/housing for a decal
- Write down the full serial number exactly as shown
- Also record the date of purchase (receipt, email confirmation, or warranty paperwork)
- If the decal is dirty, wipe it gently so all digits are readable
How to estimate the mower’s age using what you have
Because Craftsman serial formats vary by production source, we use a practical approach that works for most owners.
- Start with your purchase date (this is the clearest “age” reference for ownership and maintenance).
- If you do not have a receipt, check:
- Credit card statements
- Retailer account order history
- Service records from tune-ups or blade replacements
- If the mower has the original engine, use the engine identification as a secondary clue. The manual lists a Briggs & Stratton 675 Series engine for this model family.
Quick reference: what each number tells you
| Item you find | Where it is | What it helps with |
|---|---|---|
| Model number (917376401) | Rear housing decal | Confirms the exact mower platform |
| Serial number | Rear housing decal | Helps narrow production run |
| Date of purchase | Receipt or records | Best indicator of “how old” it is for you |
Why it matters
Knowing the mower’s age helps us choose the right maintenance schedule and parts (blade, drive components, wheels) and prevents ordering mismatched items for the wrong production run.
Last updated: January 2026
Should I use 87 or 89 gas for lawn mower?
For the Craftsman 917376401 gas walk-behind mower, we use fresh regular unleaded gasoline; 87 octane is the right choice for normal operation. Moving up to 89 octane does not improve mowing performance, starting, or engine protection in typical small-engine use.
What to use (and what to avoid)
- Use fresh, clean, regular unleaded gasoline (87 octane).
- Avoid old fuel; stale gas is a top cause of hard starting and rough running.
- Avoid alcohol-blended fuel stored too long; it can attract moisture and cause fuel separation during storage.
- Never mix cleaners into the fuel tank; use only fuel and the correct stabilizer when needed.
- If the mower will sit 30 days or longer, plan for proper storage steps.
Storage guidance (prevents most fuel problems)
The owner’s manual warns that alcohol-blended fuels can pull in moisture and form acids during storage. For storage periods of 30 days or longer, empty the tank and run the engine until the fuel lines and carburetor are empty; then refill with fresh fuel next season. See the owner's manual for the full storage procedure and safety notes.
Quick comparison: 87 vs 89 for this mower
| Fuel choice | Recommended for Craftsman 917376401 | What you gain | Best use case |
|---|---|---|---|
| 87 octane regular | Yes | Normal power and reliable operation | Everyday mowing |
| 89 octane mid-grade | No need | No measurable benefit | Only if 87 is unavailable |
Why it matters
Using the correct fuel keeps the carburetor and fuel system cleaner, reduces starting issues after storage, and helps the engine run at the right temperature. Most “fuel problems” come from stale gas and storage, not octane rating.
If you are also seeing poor cut quality, a dull or bent blade can make the engine feel weak; the correct replacement for this model is the husqvarna lawn mower 22-inch deck 3-in-1 blade 532421825.
Last updated: January 2026
What are the most common lawn mower repairs?
For the Craftsman 917376401 gas walk-behind mower, the most common repairs are routine tune-up items (fuel, air, spark), blade and deck wear, and drive or control issues. Many problems start with basic maintenance and safety checks outlined in the 917376401 owner's manual.
Most common repairs we see
- Fuel-related no-start or rough running: old gas, clogged carburetor passages, or restricted fuel flow.
- Dirty air filter: causes hard starting, surging, and loss of power.
- Worn or fouled spark plug: causes misfire, no-start, or weak power.
- Blade problems: dull, bent, or damaged blade after striking debris.
- Drive and control issues: mower will not self-propel, or the operator presence/zone control does not engage correctly.
- Grass handling issues: clogged deck, damaged deflector, or bagging/mulching parts not sealing correctly.
Quick checks before you buy parts
- Disconnect the spark plug wire before inspecting or servicing anything.
- Confirm the blade bolt and fasteners are tight (loose hardware can cause vibration).
- If you hit an object, stop and inspect the mower; repair damage before restarting.
- Clean packed grass from the deck and discharge area after the engine cools.
- Do not adjust wheel height with the engine running.
Parts that commonly wear on this model
| Symptom | Likely wear item | Example part for this model |
|---|---|---|
| Poor cut, vibration | Blade | Husqvarna lawn mower 22-inch deck 3-in-1 blade 532421825 |
| Side discharge not controlled | Deflector or spring | Lawn mower clipping deflector 532426129 |
| Self-propel issues | Transmission or drive components | Transmission 589600601 |
Why it matters
Staying on top of tune-up and safety items reduces no-start calls, improves cut quality, and helps prevent damage after impacts. The manual also notes the carburetor is not adjustable and engine speed is factory set; performance issues tied to those areas are best handled through proper service procedures.
Last updated: January 2026
What model number is a Craftsman 6.75 lawn mower?
A “Craftsman 6.75” label usually refers to the engine series (commonly a Briggs & Stratton 675 Series), not the mower’s model number. For this Craftsman walk-behind mower, the model number is 917.376401; you can confirm it on the ID label and in the 917376401 owner's manual.
Where to find the model number on the mower
Look for the mower model number on the product ID label, not on the engine shroud.
- Check the rear of the deck near the discharge opening or rear door area
- Look around the handle mounting brackets on the deck
- Inspect the top of the deck near the engine mounting area
- Wipe off grass and oil film; the label can be hard to read
- Record the full number exactly as shown (including dots if present)
“6.75” vs. mower model number: what it means
“6.75” is commonly used to describe the engine family/series, while the mower model number identifies the complete Craftsman machine (deck, drive system, handle, wheels, and controls).
| What you see | What it identifies | Example for this mower |
|---|---|---|
| 6.75 / 675 Series | Engine series | Briggs & Stratton 675 Series |
| 917.xxxxxx | Mower model number | 917.376401 |
| Engine model/type/code | Engine-specific ID | Stamped/printed on the engine |
Why it matters
Using the correct mower model number (like 917.376401) ensures you get the right walk-behind mower parts and diagrams for items such as the blade, drive system, and controls. For example, this model uses a 22-inch 3-in-1 blade such as the husqvarna lawn mower 22-inch deck 3-in-1 blade 532421825 when you are matching replacement parts.
Last updated: January 2026
