Owner’s manual
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What engine does Craftsman riding mower use?
For Craftsman riding mower model 917254940, the parts manual lists a Briggs and Stratton engine: model 303777, type 0015-02. Use this exact engine identification when ordering engine parts (carburetor, fuel filter, ignition parts) or looking up tune-up specs in the 917254940 owner's manual.
How to confirm you have the same engine on your tractor
We recommend matching the engine ID on the engine shroud or valve cover to the manual listing.
- Look for the Briggs and Stratton label and the stamped/printed model and type numbers
- Confirm the engine shows 303777 and 0015-02
- If the tractor has had an engine swap, use the engine tag numbers (not the tractor model) for engine parts
- Keep the engine ID handy before buying a carburetor kit, air filter, or ignition parts
What the engine numbers mean (quick reference)
| What you see | What it identifies | Why it matters |
|---|---|---|
| 917254940 | Tractor model number | Helps match chassis, mower deck, and drive parts |
| 303777 | Engine model number | Primary identifier for Briggs and Stratton engine parts |
| 0015-02 | Engine type number | Narrows down the exact configuration within the engine model |
Why it matters
Craftsman tractors can share the same deck size but use different engines across production runs. Using the correct Briggs and Stratton model and type prevents wrong-part issues for common repairs like fuel delivery, ignition switch wiring, and carburetor service.
Last updated: January 2026
How to identify a lawn mower engine?
On the Craftsman lawn tractor model 917254940, we identify the engine by locating the engine model number on the blower housing (the shroud over the flywheel). Your tractor model number is on the model plate under the seat, and the engine model number is a separate ID used to match engine-specific parts.
Where to find the engine ID on model 917254940
Use these locations to confirm you have the correct engine information before ordering parts:
- Tractor model plate: under the seat (lists tractor model 917254940)
- Engine model number: on the blower housing
- What to write down: engine model number, type number (if shown), and any code/serial numbers
- Clean first: wipe off grass and oil so the stamping or label is readable
- Take a photo: helps prevent transposed digits when ordering
For diagrams and the exact labeling locations, use the 917254940 owner's manual.
What the numbers mean (quick guide)
Engine IDs are used to match the correct carburetor parts, ignition parts, gaskets, and tune-up items.
| ID you find | What it identifies | Used for |
|---|---|---|
| Tractor model number (917254940) | The mower/tractor chassis | Deck, belts, steering, frame, wheels |
| Engine model number | The engine itself | Engine-specific repair parts |
| Type number (if present) | Engine configuration | Correct carburetor, governor, linkage parts |
Why it matters
Using only the tractor model number can get you close, but the engine model number is what prevents wrong engine parts. This is especially important for ignition components, fuel system parts, and tune-up items.
Last updated: January 2026
How to look up Craftsman model number?
For a Craftsman riding lawn tractor like model 917254940, we look up the model number on the model plate under the seat. Once you have the full model number and serial number, you can use them to find the correct parts list and the right owner’s manual for maintenance and repairs.
Where to find the model number on a Craftsman lawn tractor
On Craftsman tractors, the tractor model number is typically on a model plate under the seat.
- Park on a flat surface, set the parking brake, and turn the key off
- Lift the seat and look for the model plate (label) underneath
- Write down the model number and serial number exactly as shown
- Keep the numbers with your paperwork for future parts ordering
- Use the model number to match diagrams and part descriptions in the 917254940 owner's manual
Tractor model number vs. engine model number (both matter)
Your tractor and your engine have separate model identifiers. For model 917254940, the manual also lists an engine model number on the engine blower housing.
| What you’re identifying | Where to look | Why it’s used |
|---|---|---|
| Tractor model number (example: 917254940) | Model plate under the seat | Correct chassis, deck, steering, belts, and safety parts |
| Engine model number (example shown in manual: 303777) | Engine blower housing | Correct engine-specific parts like carburetion and ignition |
Tips for a clean, accurate lookup
Small character differences can change the parts list, so we recommend copying the number exactly.
- Include all digits and punctuation exactly as printed
- Clean the label gently if it’s dirty (avoid harsh solvents)
- Take a clear photo before the label fades further
- If ordering parts, provide both the model number and the part number/description
Why it matters
Using the exact Craftsman model number ensures you get the right diagrams and the correct replacement parts for your mower deck, ground drive system, and safety interlock components.
Last updated: January 2026
Is it worth replacing a lawn mower engine?
Yes, replacing the engine on a Craftsman lawn tractor like model 917254940 is worth it when the tractor’s deck, transmission, steering, and frame are in good shape and you want several more seasons of reliable mowing. If multiple major systems are worn out, putting money into an engine usually does not pay off.
Quick decision checklist
- The tractor still drives smoothly forward and reverse (no slipping or grinding)
- The mower deck is solid (not cracked or heavily rusted) and blades spin normally
- Steering is tight enough to mow safely (no severe play)
- You can get the correct replacement engine or a compatible equivalent
- The total repair cost stays below about 50% to 70% of the cost of a comparable replacement tractor
Cost and effort: what to compare
| Item to compare | Engine replacement tends to make sense when | It tends to be a poor value when |
|---|---|---|
| Overall condition | Most systems are sound | Multiple systems need work (deck, transaxle, steering) |
| Downtime | You can handle a weekend project | You need immediate, guaranteed uptime |
| Budget | You want to avoid a full replacement purchase | You are close to the price of a newer tractor |
Before you commit: rule out common “engine” problems
Many no-start or poor-running complaints are maintenance or safety-interlock related, not a failed engine. Your manual emphasizes routine service items like cleaning the air filter, using fresh fuel, and changing oil for the right temperature range. Use the troubleshooting section in the 917254940 owner's manual to check basics first.
- Verify the operator presence system is working; leaving the seat with the attachment clutch engaged can shut the engine down
- Inspect and replace a damaged muffler; the manual warns against operating without a muffler
- Clean engine cooling fins and the air filter
- Use fresh fuel and address carburetor adjustment if needed
Why it matters
An engine swap is a big investment of time and money. Confirming the tractor’s safety systems and maintenance items first helps you avoid replacing an engine when the real issue is fuel, airflow, ignition interlocks, or neglected service.
Last updated: January 2026
