Owner’s manual
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Are gas lawn mowers being phased out?
Gas walk-behind mowers like the Craftsman 917387600 are not being phased out everywhere at once, but new gas mower sales are declining in some areas as emissions rules tighten and more homeowners switch to battery-electric models for lower noise and simpler maintenance. For many owners, gas mowers will remain serviceable for years with routine upkeep using the 917387600 owner's manual.
What “phased out” usually means (and what it does not)
Most changes focus on new equipment sales, not on taking existing mowers out of service.
- Some regions restrict or plan to restrict new gas-powered outdoor equipment sales.
- Existing gas mowers can typically still be used, maintained, and repaired.
- Parts support often continues because many models share common hardware (blades, cables, wheels).
- Commercial and heavy-duty use cases often keep gas equipment in service longer.
- The practical impact for owners is usually parts availability and maintenance, not immediate obsolescence.
What we recommend for keeping a gas mower reliable
Your Craftsman 917387600 manual emphasizes safe operation and routine maintenance (oil, blade care, and hardware tightness). These steps keep performance strong even as the market shifts.
- Keep the blade sharp; replace a bent or damaged blade.
- Disconnect the spark plug wire before blade service.
- Tip the mower with the air filter and carburetor facing up when servicing the blade.
- Avoid over-priming in warm weather to prevent flooding.
- Use fuel stabilizer for storage and keep fresh fuel on hand.
Common “keep it running” parts owners replace
| What you notice | Likely maintenance item | Example part for this model |
|---|---|---|
| Poor cut quality, tearing grass | Dull or damaged blade | Lawn mower blade 532406713 |
| Blade won’t stay tight, vibration | Worn fastening hardware | Lock nut 532409149 |
| Engine runs but blade slips or wobbles | Worn adapter interface | Lawn mower blade adapter 532418373 |
Why it matters
If your area starts favoring electric mowers, the best value move is usually to maintain what you own: a sharp blade, correct starting technique, and safe service practices extend mower life and keep cut quality high.
Last updated: January 2026
Is 2 year old gasoline still good for a lawn mower?
No. For a Craftsman walk-behind mower like model 917387600, 2-year-old gasoline is stale and commonly causes hard starting, rough running, and fuel-system deposits. We recommend draining it and refilling with fresh gas before you try to start the engine; follow the fuel and storage guidance in the 917387600 owner's manual.
What stale gas does (and what you may notice)
Old fuel loses volatility and can leave varnish in the carburetor and fuel passages. In the manual’s troubleshooting list, stale fuel is a common cause of a mower that “does not start.”
Common symptoms include:
- Engine will not start or only starts with repeated priming
- Surging, hesitation, or dying when you engage the operator presence control bar
- Strong “varnish” smell from the tank or gas can
- Plug fouling and poor throttle response
What we recommend doing now
Work outdoors, away from ignition sources, and let the engine cool.
- Drain the tank and dispose of old fuel properly
- Refill with fresh gasoline from a clean, non-rusting gas can
- If the mower still will not start, check basics: air filter condition, spark plug connection, and primer operation
- If you suspect blade impact or vibration, inspect the blade mounting; a loose blade or broken adapter can also prevent starting
Quick decision guide
| Situation | Best next step |
|---|---|
| Gas is 2 years old | Drain and replace with fresh fuel |
| Gas is less than 30 days old but smells sour | Replace fuel and consider cleaning the carburetor |
| Mower ran fine, then suddenly will not start | Check for water in fuel, dirty air filter, spark plug issues |
Why it matters
Stale gasoline is one of the fastest ways to create carburetor clogs and starting problems. Using fresh fuel protects the fuel system, reduces downtime, and helps your Craftsman mower start reliably each season.
Last updated: January 2026
What model number is the Craftsman 917387600?
The model number for this Craftsman gas walk-behind lawn mower is 917.387600 (often written without the dot as 917387600). You can confirm it on the mower’s model tag and in the 917387600 owner's manual.
Where to find the model number on the mower
Most Craftsman walk-behind mowers list the model number on a product label attached to the deck or rear housing area.
- Check the top of the mower deck near the engine
- Look at the rear of the deck by the height adjusters
- Inspect the handle support area near the lower handle mounts
- Match the tag to the manual listing (Model No. 917.387600)
Why the dot matters (917.387600 vs 917387600)
Both formats refer to the same mower; the dot is a formatting style used in many Craftsman manuals and tags.
| You might see | What it means | Use it for |
|---|---|---|
| 917.387600 | Manual/tag format | Confirming identity in documentation |
| 917387600 | Website/parts lookup format | Searching parts and diagrams |
Related numbers you may also see
This mower’s documentation also lists an engine model number separately, which is not the same as the mower model number.
- Mower model number: 917.387600
- Engine model number (example shown in manual): 143.044510
- Product description in manual: Craftsman rotary lawn mower, 4.5 HP, 22 in side discharge
Why it matters
Using the exact mower model number ensures you get the correct parts (like a blade adapter, zone control cable, or handle hardware) and the right diagrams for repairs and maintenance.
Last updated: January 2026
