Owner’s manual
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Is it worth replacing a lawn mower engine?
For a Craftsman lawn tractor model 917256524, replacing the engine is worth it when the tractor is otherwise in good shape (solid deck, good transaxle, safe controls) and the total repair cost stays below about half the price of a comparable replacement tractor. If multiple major systems are worn out, replacement usually makes more sense.
Quick decision checklist
- The mower deck is structurally sound (no major rust-through or cracks)
- The transaxle drives smoothly (no slipping, grinding, or loss of drive)
- Steering and brakes work correctly (no unsafe play or poor stopping)
- You can source the correct engine and mounting hardware for this chassis
- The total cost (engine + labor + tune-up parts) is under ~50% of replacement cost
- You plan to keep the tractor for at least 2 to 3 more mowing seasons
Cost and value comparison
| Scenario | Typical outcome | Recommendation |
|---|---|---|
| Engine failed but deck, belts, and drive system are solid | Good return on repair | Replace engine |
| Engine failed and transaxle is weak or leaking | Costs stack quickly | Replace tractor |
| Engine runs but has power loss from maintenance issues | Often fixable with service | Tune up first |
| Tractor has heavy rust, worn spindles/mandrels, and vibration | Ongoing repairs likely | Replace tractor |
What to check before you commit
Use the troubleshooting and maintenance guidance in the 917256524 owner's manual to confirm the problem is truly engine-related and not a starting, wiring, or safety-interlock issue.
- If the engine will not turn over: check battery condition, terminals, fuse, wiring, ignition switch, and solenoid/starter
- If it clicks but will not start: focus on battery/terminals, wiring, and starter/solenoid
- If it has loss of power: check throttle setting, grass buildup under the deck, air filter, oil condition/level, spark plug, fuel quality, and muffler condition
Why it matters
An engine swap is a big investment, but it can extend the life of a good chassis. If the deck, belts, mandrels, and drive system are already near end-of-life, an engine replacement can leave you with a tractor that still needs frequent repairs.
Last updated: January 2026
What engine does Craftsman riding mower use?
For Craftsman lawn tractor model 917256524, the owner’s manual identifies it as a 15.5 HP IC front-engine riding lawn tractor with electric start and a 6-speed transaxle. For the exact engine make and model, use the engine model number printed on the engine blower housing (not the tractor model plate). See the 917256524 owner's manual.
How to identify the exact engine on model 917256524
We match the correct carburetor, air filter, spark plug, and tune-up parts by the engine model number, not the tractor model number.
- Lift the seat and locate the tractor model plate (this confirms 917256524).
- Open the hood and find the engine blower housing (fan shroud).
- Look for a sticker or stamped tag with the engine model and type.
- Write down the full engine ID exactly as shown.
- Use that engine ID when ordering engine-specific parts.
What the manual tells you (tractor vs. engine)
The manual separates the tractor identification from the engine identification.
| Item you’re identifying | Where to find it | What it’s used for |
|---|---|---|
| Tractor model number (917256524) | Model plate under the seat | Deck, belts, steering, wheels, chassis parts |
| Engine model number | Blower housing on the engine | Engine parts (filters, ignition, carburetor) |
Why it matters
Many Craftsman riding mowers were built with different engine families over time. Using the engine model number prevents ordering the wrong maintenance parts and helps you get the right starting, fuel, and ignition components.
Related maintenance tip
If you’re doing seasonal service, follow the maintenance intervals and procedures in the 917256524 owner's manual so belts, blades, and filters are serviced on schedule.
Last updated: January 2026
How much does it cost to replace a riding lawn mower engine?
Replacing the engine on a Craftsman riding lawn tractor like model 917256524 typically costs about $260 to $1,800 installed, depending on the engine price, whether you replace related wear items, and local labor rates. Most shops bill around 6 labor hours for a riding mower engine swap.
What drives the total price
- Engine cost (new, remanufactured, or used)
- Labor time and shop rate (engine removal, transfer of parts, test run)
- Extra parts often replaced at the same time (belts, hardware, filters)
- Condition of wiring and fuel system (repairs add time)
- Pickup and delivery fees (if you do not transport the tractor)
Typical cost breakdown
| Cost item | Typical range | Notes |
|---|---|---|
| Engine (part only) | $200 to $1,400 | Varies by HP, shaft size, and brand |
| Labor | $60 to $600 | Often ~6 hours total |
| Misc. parts and supplies | $0 to $200 | Belts, fuel line, clamps, oil, filter |
| Total installed | $260 to $1,800 | Common real-world range |
Smart checks before you buy an engine
Our experience is that many “needs an engine” tractors actually have a starting or electrical issue. The troubleshooting section in the 917256524 owner's manual covers common no-crank causes like a weak battery, blown fuse, corroded terminals, loose wiring, and a bad solenoid or starter.
- Confirm the engine model number on the blower housing (tractor and engine have different model numbers)
- Test the battery and cables (clean and tighten terminals)
- Check the fuse and wiring connections
- Verify safety interlock switches (seat, brake, PTO)
- If it clicks but will not crank, test the starter/solenoid circuit
Why it matters
An engine replacement is one of the highest-cost repairs on a riding mower. Spending a little time diagnosing first helps you avoid paying for an engine when the real fix is a battery, wiring repair, or starter-related part.
Last updated: January 2026
