Where can I find my lawn mower engine model number?
On your Craftsman lawn tractor model 917250820, the engine model number is printed on an engine ID label or stamped into the metal on the engine shroud, valve cover, or blower housing. We use that engine number to match the correct tune-up and engine parts.
Where to look on the engine (most common spots)
Check these areas with the engine cool and the key removed:
- Top of the engine cover/shroud (often near the recoil housing area, even on electric-start tractors)
- Valve cover (common on twin-cylinder engines)
- Side of the blower housing (a more visible side label on some engines)
- Near the spark plug area (look for a small sticker or stamped pad)
- On the engine block near the muffler or dipstick tube (stamped numbers on some designs)
What numbers to write down
Most engines use a 3-part ID. Record everything exactly as shown.
| What to capture | Example format | Why we need it |
|---|---|---|
| Model | 12XXXX-XXXX | Identifies the engine family |
| Type/Spec | XXXXXXX | Matches the exact build configuration |
| Code/Serial | YYMMDD or long serial | Helps confirm production version |
Quick tips to make the label readable
- Wipe the area with a rag and mild degreaser; avoid soaking electrical parts.
- Use a flashlight and take a phone photo, then zoom in.
- If the sticker is missing, look for stamped numbers on a flat metal pad.
Why it matters
The tractor model 917250820 identifies the chassis and deck, but the engine model number is what ensures you get the right ignition parts, filters, carburetor parts, and other engine-specific items.
For diagrams and model-specific locations to check on your tractor, use the 917250820 owner's manual.
Last updated: January 2026
What engine does Craftsman riding mower use?
The Craftsman lawn tractor model 917250820 uses a gasoline engine, and Craftsman commonly paired this style of front-engine riding mower with a Briggs & Stratton single-cylinder engine in the 17 to 20 HP class. For the exact engine family and spec numbers for your unit, match the engine ID tag to the listing in the 917250820 owner's manual.
How to identify the exact engine on your 917250820
Use the engine’s identification label (usually on the blower housing, valve cover area, or near the starter) and record:
- Engine brand (often Briggs & Stratton)
- Model number
- Type number
- Code (date code)
- Displacement or HP rating (if shown)
Quick checks that confirm you have the right engine info
Before ordering tune-up parts or troubleshooting a no-start, we recommend these basics:
- Verify the mower model tag reads 917250820
- Confirm the engine label is readable and matches what you write down
- Check that the battery cables are tight and clean
- Make sure fresh fuel is in the tank and the fuel shutoff (if equipped) is open
- Confirm the PTO/blade switch is off and the brake is fully depressed (safety interlocks)
Common symptoms and what they usually point to
| What you notice | Most common cause | What to check first |
|---|---|---|
| Clicks but won’t crank | Weak battery or bad solenoid | Battery charge, cable connections, solenoid |
| Cranks but won’t start | Fuel or ignition issue | Fresh fuel, spark plug, air filter |
| Starts then dies | Safety switch or fuel delivery | Seat/brake switches, fuel flow |
For step-by-step help, use riding lawn mower engine clicks but doesnt turn over video when you hear clicking, or riding lawn mower engine spins but wont start video when it cranks but will not fire.
Why it matters
The engine’s model/type/code determines the correct maintenance parts (spark plug, air filter, fuel filter) and the right troubleshooting steps. Using the engine ID prevents ordering the wrong parts even when the tractor model number is correct.
Last updated: January 2026
Is it worth replacing a lawn mower engine?
Yes, replacing the engine on your Craftsman lawn tractor model 917250820 is worth it when the tractor’s deck, steering, and transmission are still solid and the total engine swap cost stays well below the cost of a comparable replacement tractor. If the tractor also needs major deck or drive repairs, replacement usually makes more sense.
Quick decision checklist
- The mower deck shell is not cracked or badly rusted through
- The transmission drives smoothly (no slipping, whining, or loss of power)
- Steering and front axle are tight enough to track straight
- You can do the work yourself or have a shop you trust
- The engine swap (engine, hardware, belts, fluids, labor) is under about half the price of a similar new tractor
Costs and effort: what to compare
Engine replacement is more than “just the engine”; plan for wear items you often touch during the job.
| Item to compare | Replace engine | Replace tractor |
|---|---|---|
| Upfront cost | Medium to high | High |
| Time required | Several hours to a weekend | Minimal |
| Risk of extra repairs | Medium | Low |
| Result | Strong chassis with fresh power | All-new machine |
Parts that commonly get addressed during an engine swap
Even if the engine is the main issue, we often see customers discover other problems once the tractor is apart.
- Deck drive components (spindles, pulleys, blades)
- Belts and belt keepers (routing and alignment)
- Battery cables and starting circuit connections
- Fuel system condition (tank, lines, old fuel)
If your deck has vibration, squeal, or uneven cutting, it can be smart to inspect the Craftsman lawn tractor mandrel shaft 587819701 while you are already working around the deck.
Why it matters
A good 917250820 chassis can last many seasons; a new engine can restore reliability and starting performance. But if the tractor also needs a deck rebuild, steering parts, and transmission work, costs stack quickly and you lose the value advantage.
Model-specific tip
Use the 917250820 owner’s manual to confirm engine mounting, wiring routing, throttle/choke linkage setup, and safety interlock checks before the first start.
Last updated: January 2026
Who makes Craftsman engines?
Craftsman-branded engines are made by multiple manufacturers depending on the specific mower or tractor; for a Craftsman front-engine lawn tractor like model 917250820, the engine maker is identified on the engine label and in the 917250820 owner's manual.
How to identify the engine manufacturer on your 917250820
Check the engine itself first; it is the fastest and most accurate way.
- Lift the hood and look for the engine brand badge (Briggs & Stratton, Kohler, Kawasaki, etc.)
- Find the engine ID label (usually on the blower housing, valve cover, or near the starter)
- Write down the engine model, type/spec, and code/serial numbers
- Match those numbers to the engine section in the 917250820 owner's manual
- Use the engine model/spec to order tune-up parts (air filter, spark plug, fuel filter)
Common Craftsman engine suppliers (what you will typically see)
Craftsman has commonly sourced engines from several major small-engine brands across different product lines and years.
| Engine brand | Where you’ll see it most often | What the label usually shows |
|---|---|---|
| Briggs & Stratton | Many Craftsman lawn tractors and walk-behind mowers | Model, type, code |
| Kohler | Some mid to higher horsepower tractors | Model, spec, serial |
| Kawasaki | Some premium tractors | Model, spec, serial |
Why it matters
The engine manufacturer determines the correct maintenance parts and service specs (oil type/quantity, spark plug gap, air filter style). Using the engine model/spec from the label helps prevent ordering the wrong parts for your Craftsman 917250820.
Related repair and maintenance help
If you’re troubleshooting a no-start or weak-crank issue, these DIY resources are often the quickest path to a fix:
- Riding lawn mower engine clicks but doesnt turn over video
- Riding lawn mower engine spins but wont start video
- How to tune up a riding lawn mower video
Last updated: January 2026





