Owner’s manual
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Are gas lawn mowers being phased out?
Gas walk-behind mowers like the Craftsman 917387151 are still widely used and supported, but the residential market is steadily shifting toward battery-electric models due to noise, emissions, and maintenance preferences. In practice, this means gas mowers are not “gone,” but you will see more electric options and, in some areas, tighter rules on new gas equipment sales.
What this means for your Craftsman 917387151
You can keep maintaining and repairing your mower normally. The biggest change most owners notice is availability and selection of new gas models in stores, not an immediate loss of parts support.
- Keep up with routine maintenance (oil level, air filter, spark plug, blade condition).
- Store fuel correctly if the mower will sit 30 days or more.
- Clean grass buildup to protect airflow and engine life.
- Replace worn cutting parts (blade, blade adapter) to keep cut quality high.
- Use the safety and operation steps in the Craftsman 917387151 owner's manual.
Practical maintenance checklist (keeps gas mowers viable longer)
The manual emphasizes regular checks and seasonal service. Use this as a simple baseline:
| Task | Typical timing | Why it helps |
|---|---|---|
| Check engine oil level | Before each use | Prevents engine wear and overheating |
| Clean or replace air filter | During season, more in dusty mowing | Maintains power and fuel efficiency |
| Replace spark plug | About once per year | Improves starting and smooth running |
| Inspect/replace blade | At least seasonally | Cleaner cut, less engine strain |
If you need a common wear item for cutting performance, the lawn mower mulching blade 532406713 is one of the model-listed blade options.
Why it matters
Even as electric mowers grow in popularity, a well-maintained gas mower remains a strong choice for thicker grass, longer run time, and quick refueling. Staying on top of blade condition, airflow cleanliness, and fuel storage is what keeps a gas mower reliable year after year.
Last updated: January 2026
How to find Craftsman model number?
On the Craftsman walk-behind mower model 917387151, the model number is typically printed on a product ID sticker on the rear of the mower deck, usually between the lower handle mounts. Use that exact number when ordering parts or checking specifications in the 917387151 owner's manual.
Where to look on the mower
Check these common label locations first:
- Back of the deck (most common), between the lower handle mounting points
- Rear discharge area near the bag opening (if equipped)
- Side or top of the deck near the engine mounting area
- Under the handle crossbar area (less common)
What to write down (and why)
Record the full ID information so we can match the correct parts diagram and hardware.
- Model number (example: 917387151)
- Serial number (helps confirm production run)
- Engine model number (this mower commonly uses a Craftsman 4-cycle engine; the manual shows engine model listings such as 143.975500)
Quick ID checklist
| Item | What it’s used for | Example you might see |
|---|---|---|
| Mower model number | Deck, handle, wheels, blade, bag parts | 917387151 |
| Serial number | Version match, production changes | Varies |
| Engine model number | Carburetor, recoil starter, ignition parts | 143.975500 |
Why it matters
Craftsman walk-behind mowers can look similar across multiple model numbers, but parts like the blade, blade adapter, control cable, and fasteners can vary by deck and production run. Using the exact model number prevents ordering the wrong part the first time.
Last updated: January 2026
Should I use 87 or 91 gas for lawn mower?
For the Craftsman 917387151 walk-behind mower, we recommend regular unleaded gasoline with a minimum of 87 octane; using 91 octane is not necessary for normal operation. The key is using fresh, clean fuel and not mixing oil into the gas. See the fuel guidance in the 917387151 owner's manual.
What to use (and what to avoid)
- Use 87 octane (regular unleaded) or higher if that is what you have available.
- Use fresh fuel; buy only what you can use in a short period.
- Do not mix oil with gasoline (this is a 4-cycle mower engine).
- Avoid stale fuel; it is a common cause of no-start problems.
- Keep the fuel can clean and replace it if it starts to rust.
Why 87 is the right choice for most mowing
Octane mainly affects resistance to knock in higher-compression engines. Most walk-behind mower engines are designed to run correctly on regular unleaded. Higher octane does not add power or make the mower “run cleaner” by itself; fuel freshness and proper maintenance matter more.
Quick comparison
| Fuel choice | OK to use? | What you will notice |
|---|---|---|
| 87 octane regular unleaded | Yes (recommended minimum) | Normal starting and performance |
| 91 octane premium | Yes (not required) | Typically no performance benefit |
| Old/stale gasoline | No | Hard starting, surging, stalling |
| Gas mixed with oil | No | Excess smoke, plug fouling, poor running |
Why it matters
Using the correct fuel helps your Craftsman mower start easier, run smoother, and reduces avoidable issues like “won’t start” symptoms tied to stale gas and contamination.
If you are dealing with hard starting or rough running, our lawn mower wont start troubleshooting video fuel ignition and compression is a good next step.
Last updated: January 2026
