Owner’s manual
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What kind of engine does a Craftsman riding lawn mower have?
The Craftsman riding lawn mower model 917273090 uses a gasoline, single-cylinder, 4-cycle small engine (the exact brand and horsepower vary by the engine spec number installed on your tractor). We use the engine identification details in your 917273090 owner's manual to match the correct tune-up and fuel-system parts.
How to identify the exact engine on model 917273090
Look for the engine’s ID label, then match it to parts and service info.
- Check the valve cover, blower housing, or starter shroud for a label
- Record the engine brand (commonly Briggs & Stratton, Kohler, or similar)
- Write down the model, type, and code (or spec) numbers
- Confirm whether it is single-cylinder or V-twin by the label and cylinder layout
- Use the numbers to select the correct air filter, spark plug, and fuel filter
What “kind of engine” means for maintenance
Most front-engine Craftsman lawn tractors like 917273090 use a vertical-shaft engine designed to drive a belt-and-pulley system for the mower deck and transmission.
| Engine detail | What you’ll see | Why it matters |
|---|---|---|
| Fuel type | Gasoline | Determines storage and fuel stabilizer needs |
| Cycle | 4-cycle | Uses crankcase oil (no oil mixed in fuel) |
| Cylinders | Single-cylinder (typical) | Affects vibration, plug count, and tune-up parts |
| Cooling | Air-cooled | Clean fins and shrouds to prevent overheating |
Why it matters
Engine identification prevents wrong-part returns and helps you troubleshoot common issues like hard starting, surging, or stalling. For example, a no-start can be caused by a weak battery, bad safety switch, or a faulty PTO circuit; the riding lawn mower engine spins but wont start video walks through the most common checks.
Last updated: February 2026
What model number is the Craftsman 917273090?
The model number is 917273090. On Craftsman riding mowers and tractors, the model number is the primary identifier we use to match the correct parts diagrams, maintenance specs, and replacement parts for your exact tractor; check the ID tag on the frame to confirm it matches.
Where to find the model number on the tractor
Most Craftsman front-engine lawn tractors list the model number on a product ID label. Common places to look:
- Under the seat pan or on the seat deck
- On the frame rail near the engine
- Near the rear fender area
- Under the hood area on the chassis
If the label is dirty or faded, wipe it clean and use a flashlight; a phone photo often makes the numbers easier to read.
What to record (so parts match the first time)
Along with 917273090, we recommend writing down these details from the ID label:
- Model number (917273090)
- Product number or serial number (if shown)
- Engine model and type (often on the engine itself)
- Deck size (if listed)
Quick check: Sears model number vs. retail model name
Some tractors also have a retail name (for example, a “T” series name) that is different from the Sears model number. For parts and diagrams, the Sears model number is the one that matters.
| Identifier type | Example | Best used for |
|---|---|---|
| Sears model number | 917273090 | Parts lookup, diagrams, repair help |
| Retail/marketing name | Varies by seller | General product description |
Why it matters
Using the exact model number helps ensure parts like belts, steering components, and electrical items (such as a PTO switch) match your tractor’s build and avoid fitment issues.
For model-specific labeling details and maintenance references, use the 917273090 owner's manual.
Last updated: February 2026
What size belt do I need for my 42 inch deck?
For your Craftsman lawn tractor model 917273090, the correct 42-inch deck belt size depends on the exact deck and pulley routing used on that model; most 42-inch mower deck belts are 1/2-inch wide and commonly fall in the 95 to 102 inch length range. Use the belt routing diagram and parts listing in the 917273090 owner's manual to match the exact belt.
How to identify the exact belt you need
- Confirm the deck is actually a 42-inch deck (measure blade tip-to-tip across the deck, not the tractor width).
- Check the belt routing decal on the deck (often near the idler pulley area).
- Compare the routing to the diagram in the manual so you know you are buying the deck belt, not the ground drive belt.
- If your old belt is available, read the printed numbers on the belt; if they are worn off, measure the belt length with a tape.
- Inspect idler pulleys and mandrel pulleys; a seized pulley can shred a new belt quickly.
Deck belt vs ground drive belt (quick comparison)
| Belt type | What it drives | Common symptom when bad | Typical width |
|---|---|---|---|
| Deck belt | Mower blades (deck) | Blades slip, squeal, or stop in tall grass | 1/2 in |
| Ground drive belt | Tractor movement | Tractor slows, won’t climb hills, or won’t move | 1/2 in |
Why it matters
A belt that is even slightly off in length can cause poor blade engagement, premature belt wear, or the belt jumping off the pulleys. Matching the correct routing and belt spec for 917273090 prevents repeat failures and protects spindles, idlers, and the PTO system.
Related maintenance to do at the same time
- Clean packed grass from the deck to reduce belt heat.
- Check the idler pulley for wobble or noise.
- Verify the PTO engagement feels smooth and consistent.
- Re-level the deck after belt replacement for an even cut.
Last updated: February 2026
Where can I get Craftsman replacement parts?
For your Craftsman front-engine lawn tractor model 917273090, we recommend buying replacement parts by searching with the full model number so you get an exact fit. Sears PartsDirect is a reliable source for model-matched parts diagrams and OEM replacements; your 917273090 owner's manual also helps you identify the correct part names and locations before ordering.
Best places to buy Craftsman parts
Use your model number (917273090) first, then confirm the part description and any measurements.
- Sears PartsDirect: model-specific parts lists and diagrams for tractors and riding mowers
- Craftsman parts store: official brand source for service parts
- Major retailers (online and in-store): good for common maintenance items
- Specialty parts sites: helpful for outdoor power equipment parts lookups
- Local small-engine shops: useful when you want hands-on help confirming fit
How to make sure you order the right part
The fastest way to avoid returns is to match the part by function and location on the tractor.
| What to match | What to check | Example from this model’s parts list |
|---|---|---|
| Model number | Use the full model: 917273090 | Craftsman 917273090 |
| Part ID | Match the exact ID on the listing | Switch.pto.3 582107601 |
| Part description | Confirm it matches the failed component | PTO switch vs. ignition key |
| Hardware size | Verify thread size/diameter when applicable | Lock nuts and ring clips |
Common parts customers replace on model 917273090
These are frequently ordered items for riding mowers and tractors; confirm symptoms before replacing.
- Molded ignition key 532140403 if the key is missing or damaged
- Switch.pto.3 582107601 if the deck will not engage or cuts out intermittently
- Lawn tractor lawn mower secondary v-belt 532137153 if drive performance slips or the belt is worn
- Tires, rims, and steering parts if handling or traction changes
Why it matters
Craftsman tractors often have similar-looking parts across multiple model series. Using 917273090 plus the exact part ID helps ensure the replacement matches your deck, drive system, and safety interlocks.
Last updated: February 2026
Who makes Craftsman engines?
Craftsman engines are not made by a single manufacturer. Craftsman riding mowers and lawn tractors (including model 917273090) have commonly been equipped with engines supplied by major engine makers such as Briggs & Stratton, Kohler, and Kawasaki; the exact engine brand depends on the specific tractor configuration and production run.
How to identify the engine maker on your 917273090
Use the engine’s ID tag, not the tractor hood decal. The quickest checks are:
- Look for an engine label on the blower housing, valve cover, or near the starter
- Record the engine model, type/spec, and code/serial numbers
- Match those numbers to the engine maker’s parts lookup (Briggs, Kohler, Kawasaki)
- Confirm the correct tune-up parts (air filter, spark plug, fuel filter) before ordering
- Cross-check the engine information in the 917273090 owner's manual
What “Craftsman engine” usually means
Craftsman is the equipment brand; the engine is typically sourced from an engine OEM. Here’s how that affects parts and service:
| What you’re doing | Use the tractor model (917273090) | Use the engine model/spec |
|---|---|---|
| Deck, steering, drive, chassis parts | Yes | No |
| Engine tune-up parts (plug, filter, carb parts) | Sometimes | Yes |
| Wiring/safety switches tied to starting | Yes | Sometimes |
Why it matters
Ordering engine parts by “Craftsman” alone often leads to mismatches. Using the engine’s model/spec ensures you get the right maintenance items and avoids repeat no-start or poor-running issues.
Related starting and running help
If you’re troubleshooting a click-no-crank or crank-no-start condition, these guides help narrow it down:
- 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: February 2026
