Owner’s manual
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How to find Craftsman model number?
On the Craftsman lawn tractor model 917273900, the model number is typically shown on an ID label on the frame under the seat (or on the underside of the seat). Use that exact number to match the correct operator information and order the right belts, blades, and electrical parts using the 917273900 owner's manual.
Where to look on the tractor
Check these common ID-label locations first:
- Under the seat on the frame (lift the seat and look down at the chassis rails)
- Underside of the seat pan (flip the seat up and look underneath)
- Rear fender pan area near the seat mounting points (some units place the label nearby)
- Near the engine compartment on the frame rail (less common, but worth a quick look)
What to write down (and why)
Record the information exactly as printed so parts and diagrams match your unit.
| Label item | Example | Why it matters |
|---|---|---|
| Model number | 917273900 | Identifies the correct parts list and diagrams |
| Serial number | (varies) | Helps confirm production run and compatible revisions |
| Engine info | (varies) | Used for engine-specific tune-up parts |
Tips if the label is dirty or hard to read
- Wipe the label with a damp rag and mild soap; avoid harsh solvents.
- Use a flashlight at a low angle to make faint printing easier to see.
- Take a close-up photo and zoom in to read worn characters.
- If only part of the number is readable, compare it to the format shown in the manual (for example, 917.27390 is the same family as 917273900).
Why it matters
The model number is the fastest way to avoid ordering the wrong deck belt, blade drive belt, or starting-system parts. For example, once you confirm the model, you can confidently match common wear items like the lawn tractor starter solenoid 582042802 to the correct wiring and mounting style.
Last updated: February 2026
Is it worth replacing a lawn mower engine?
Yes, replacing the engine on your Craftsman lawn tractor model 917273900 is worth it when the tractor’s deck, transmission, and steering are still solid and the total engine-swap cost stays well below the price of a comparable new rider. If multiple major systems are worn out, replacement makes less sense.
Quick decision checklist
- The mower deck is structurally sound (no severe rust-through or cracks)
- The transmission drives smoothly and does not slip
- Steering and front axle components are tight (no excessive play)
- You can do basic maintenance safely (oil, spark plug, belts)
- The engine failure is isolated (not caused by chronic overheating or poor lubrication)
- The total repair cost is comfortably under about half the cost of a similar new tractor
Cost and value: what to compare
Use this simple comparison to decide where your money goes.
| Option | Upfront cost | Reliability | Best when |
|---|---|---|---|
| Replace engine | Medium to high | High (with a new engine) | Deck and drivetrain are in good shape |
| Repair existing engine | Low to medium | Medium | Issue is minor (carburetion, ignition, fuel) |
| Replace tractor | High | High | Multiple major components are worn |
Before you commit: rule out “not an engine” problems
Many “bad engine” symptoms are actually maintenance or drive issues. Our manual’s troubleshooting guidance points to common causes of power loss like dirty air filter, low oil, stale fuel, and clogged cooling fins. Use the 917273900 owner’s manual to walk through the checks.
- Check oil level and condition (low or dirty oil can cause power loss)
- Replace the spark plug at the recommended interval (100 hours or each season)
- Inspect for debris buildup around the engine and under the mower housing
- Verify fresh fuel and a clean fuel filter
- Confirm the throttle is in FAST when mowing
Why it matters
An engine swap can restore years of service, but only if the rest of the tractor can safely handle the workload. The manual also emphasizes safe servicing practices (never adjust with the engine running; blades are sharp; keep debris cleaned up), which becomes even more important during a major repair.
Last updated: February 2026
What kind of engine does a Craftsman riding lawn mower have?
The Craftsman lawn tractor model 917273900 is equipped with a low-emission internal combustion engine; the operator’s manual for this model family is labeled 20.0 HP, 46-inch mower, electric start, automatic transmission. For the exact engine manufacturer and engine model, match the engine ID label on your tractor to the details in the 917273900 owner's manual.
How to identify the exact engine on your 917273900
Use these quick checks so you get the right tune-up parts and service specs:
- Look for the engine ID label (typically on the blower housing, valve cover, or near the starter)
- Record model, type, and code (common on Briggs and Stratton engines)
- Compare the label to the engine section in the manual
- Note whether your tractor has electric start and automatic transmission (both are called out in the manual)
- If the label is missing, use the tractor’s model number 917273900 plus the engine’s visible features (air filter style, carburetor layout) to narrow it down
What “kind of engine” means for service and parts
Most customers mean one of these: fuel type, emissions design, or power class.
| What you’re trying to confirm | What we can say for 917273900 | Where to verify |
|---|---|---|
| Engine type | Gas, low-emission internal combustion engine | Engine label and manual |
| Starting system | Electric start | Manual features list |
| Power class | Manual cover shows 20.0 HP (gross power rating is defined by the engine maker) | Manual and engine maker data |
| Drive system (not engine) | Automatic transmission is listed on the manual cover | Manual |
Why it matters
The engine maker and exact engine model determine the correct oil type, spark plug, air filter, and carburetor settings. Using the engine ID label prevents ordering the wrong maintenance parts and helps troubleshooting no-start or hard-start symptoms.
Last updated: February 2026
What model number is the Craftsman 917273900 engine?
The Craftsman lawn tractor model 917273900 uses a low-emission engine, but the engine’s own model number is not the same as the tractor model number. For the exact engine model and specification label location on your unit, follow the identification steps in the 917273900 owner's manual.
How to find the engine model number on the tractor
We recommend reading the engine ID section first, then confirming the numbers directly on the engine shroud or valve cover area.
- Turn the tractor off, remove the key, and let the engine cool completely.
- Lift the hood and look for an engine label or stamped tag (often on the blower housing).
- Write down the engine model, type, and code (or spec) exactly as shown.
- Compare those numbers to the engine manufacturer’s parts list when ordering engine-specific parts.
- If the label is dirty, wipe it gently; avoid spraying water directly into electrical components.
Tractor model vs. engine model: what’s the difference?
The tractor model (917273900) identifies the Craftsman riding mower platform (deck, chassis, transmission, steering). The engine model identifies the engine manufacturer’s build and is used for engine tune-up parts.
| You’re identifying | Example of what it looks like | Used for |
|---|---|---|
| Tractor model number | 917273900 | Deck belts, blades, steering, transmission parts |
| Engine model number | Model/Type/Code (varies by engine maker) | Spark plug, air filter, carburetor, starter parts |
Why it matters when ordering parts
Using the correct model number prevents ordering the wrong part. For example, deck and cutting components are tractor-specific, such as the husqvarna lawn tractor blade drive belt 584453101 or the husqvarna lawn tractor 46-in deck high-lift blade 532405380, while tune-up parts depend on the engine’s model/type code.
Last updated: February 2026
What year did Craftsman make the 917273900?
Craftsman lawn tractor model 917.273900 was produced in the early 1990s, and this model series is commonly dated to 1991. The most reliable way to confirm the exact build year for your specific tractor is to match the product identification label information to the details in the 917273900 owner's manual.
How to confirm the exact year for your specific tractor
Even within the same model number, production can span more than one season. We use the tractor’s ID label to pin down the exact build date.
- Locate the product identification label (typically under the seat, on the frame rail, or near the engine)
- Write down the model number (917.273900) and any serial number/date code
- Compare the label details to the identification and support information in the 917273900 owner's manual
- If the label is damaged, clean it gently and use a flashlight to read stamped characters
- Keep the serial number handy when ordering parts like belts, blades, or steering links
Where the “year” shows up (and where it doesn’t)
Many Craftsman tractors list the model number clearly, but the build year is usually tied to the serial/date code rather than printed as a big “1991” on the hood.
| Item you can find | What it tells us | What it does not tell us |
|---|---|---|
| Model number: 917.273900 | The correct parts breakdown and manual family | The exact month/day it was built |
| Serial number/date code | The best clue to the exact production date | The deck size or engine condition |
| Engine model/type code | Engine-specific year and specs | The tractor chassis production year |
Why it matters
The build year affects parts compatibility for wear items and assemblies such as the blade drive belt, mandrel components, and steering hardware. Confirming the ID label details helps ensure you get the right replacement the first time.
Last updated: February 2026
