Owner’s manual
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Do Craftsman mowers use Briggs and Stratton engines?
Yes. The Craftsman front-engine lawn tractor model 917273811 uses a Briggs & Stratton engine; the manual lists the engine model as 31P777 (type 0296-E1). For your exact engine identification and service details, use the 917273811 owner's manual.
What this means for parts and maintenance
When you know the engine brand and model, you can match the correct tune-up parts and engine-specific components (filters, gaskets, carburetor parts) and avoid ordering the wrong items.
- Check the engine shroud label for the model/type/code stamping
- Use 31P777 and 0296-E1 when looking up engine parts diagrams
- Follow the manual for oil type, capacity, and service intervals
- Replace worn deck parts (blades, belts, mandrel parts) separately from engine parts
- Keep a spare ignition key on hand if yours is worn or missing
Quick ID table (tractor vs. engine)
| Item | What it identifies | Where to find it |
|---|---|---|
| Tractor model number | The mower/tractor platform | Frame tag; manual cover pages |
| Engine model/type | The engine family and configuration | Engine shroud label; manual engine pages |
| Engine code | Build date info for the engine | Engine shroud label |
Common Craftsman engine setups (so you know what to expect)
Craftsman riding mowers and tractors are commonly equipped with engines from Briggs & Stratton (like your 917273811), and some models use other engine brands depending on the tractor series and year.
Why it matters
Engine brand and model drive the correct parts match for ignition, fuel, and air intake systems; the tractor model number drives chassis and deck parts like blades, belts, and mandrel assemblies.
Related part you may need
If you need a replacement key for normal starting and operation, use the molded ignition key 532140403.
Last updated: February 2026
How to find Craftsman mower model number?
Your Craftsman riding mower model number is on the tractor’s ID label (not on the engine). For the Craftsman model 917273811, the model number is used to match the correct parts list, decals, and deck components; confirm it on the label and in the 917273811 owner's manual.
Where to look on a Craftsman riding mower
On most Craftsman front-engine lawn tractors, the model/serial label is typically found in one of these spots:
- Under the seat on the seat pan or fender area
- On the rear fender deck near the seat
- On the frame rail near the engine compartment
- Under the hood area on the chassis (near the steering column)
- Near the footrest area on the frame
What the model number looks like (and what to write down)
For Craftsman tractors, the model number is usually a 9-digit number (often shown with a dot in manuals).
| What to record | Example for this tractor | Why it matters |
|---|---|---|
| Model number | 917273811 | Matches the correct parts diagrams and lists |
| Serial number | (from the same label) | Helps confirm production version |
| Deck size | 42-inch deck | Ensures correct blades, belt routing, and deck parts |
Model number vs. engine numbers
The engine has its own model/type/code, but that is mainly for engine-specific parts. For everything else (mower deck, steering, chassis, wheels, electrical), use the tractor model number.
Quick examples of tractor parts that depend on the tractor model
- Mower deck assembly and belt routing
- Blades and mandrel assemblies
- Steering gears and front axle parts
- Wheels and tires
- Ignition key and dash components
Why it matters
Using the correct model number prevents ordering the wrong deck parts or blades for a 42-inch setup. For example, once you confirm you have model 917273811, you can confidently match common wear items like the lawn tractor 42-in deck high-lift blade 532138971 to the correct deck configuration.
Last updated: February 2026
What kind of oil do you use in a Craftsman lawn tractor?
For the Craftsman lawn tractor model 917273811, use a high-quality detergent 4-cycle engine oil that meets API service classification SG-SL, and choose the SAE viscosity based on your expected outdoor temperature (per the oil viscosity chart in the owner's manual).
Recommended oil type and viscosity
The manual specifies an API rating (SG-SL) and directs you to select viscosity by temperature. In practice, these are the most common choices for riding mower engines:
- SAE 10W-30: best all-around choice for many climates
- SAE 5W-30: best for colder starts and early-season mowing
- SAE 30: common for consistently warm weather
If you already have 5W-30 4-cycle engine oil, it’s a solid choice for cooler weather operation and easier starting.
Oil level and change interval (what we follow)
Keeping the oil at the correct level matters as much as the oil type.
- Check oil with the tractor on level ground
- Wipe the dipstick, reinstall and tighten, then recheck the level
- Fill only to the FULL mark (do not overfill)
- Check oil before starting and after each 8 hours of operation
- Change oil every 50 hours of operation or at least once a year
Quick reference table
| Situation | What to use | Why |
|---|---|---|
| Cold-weather starting | SAE 5W-30 | Flows better when cold |
| Mixed temps, typical mowing | SAE 10W-30 | Good all-season protection |
| Hot, steady summer temps | SAE 30 | Stable viscosity in heat |
Why it matters
Running low on oil or using the wrong viscosity increases heat and wear. On a front-engine tractor like the Craftsman 917273811, correct oil level and timely changes help protect the engine and keep starting and mowing performance consistent.
Last updated: February 2026
What model number is the Craftsman 42 riding mower?
For the Craftsman front-engine lawn tractor with a 42-inch mower deck on this page, the model number is 917.273811. You can confirm it on the product ID label and in the 917273811 owner's manual.
How to confirm the model number on your tractor
Use these quick checks to make sure you are matching parts and diagrams to the right Craftsman tractor:
- Check the product ID label under the seat, on the frame, or near the rear fender area
- Match the model format; Craftsman tractor models commonly start with 917.
- Verify the deck size; this model uses a 42-inch mower deck
- Cross-check the model number in the manual parts lists and diagrams
- Use the model number (not just “Craftsman 42”) when ordering blades, belts, and mandrel parts
What “42” means for this model
On Craftsman riding mowers, “42” typically refers to the cutting width of the mower deck, not the tractor itself. For model 917.273811, the manual’s mower deck section lists a 42-inch deck assembly and compatible blades.
| Item | What to look for | Example for this model |
|---|---|---|
| Model number | Exact identifier for parts fit | 917.273811 |
| Deck size | Cutting width | 42-inch |
| Common deck wear parts | Blades, belt, mandrel components | Blade, V-belt, mandrel shaft |
Parts that commonly depend on the exact model number
If you are shopping for deck parts, the model number matters because blade style and mounting can vary.
- For mulching setups, use the husqvarna lawn tractor mulching blade, 21-in 532134149
- For bagging or side discharge, use the lawn tractor 42-in deck high-lift blade 532138971
- For deck drive issues (slipping, squealing, poor blade speed), check the condition and routing of the ground drive and deck belts
Why it matters
Using the correct model number (917.273811) prevents wrong-part returns and helps you get the right diagrams for deck, electrical, steering, and chassis components.
Last updated: February 2026
