Owner’s manual
How much does it cost to replace a riding lawn mower engine?
For a Craftsman lawn tractor model 917252540, a full engine replacement typically costs $600 to $2,500 installed (engine plus labor). The biggest variables are the replacement engine price, shop labor rate, and whether related items like belts, fuel lines, or wiring repairs are needed.
What determines the price most
These are the factors that move the total up or down:
- Engine type and horsepower (single-cylinder vs V-twin, electric start, charging system)
- Correct engine match (shaft size, crankshaft length, mounting pattern, PTO setup)
- Labor time (removing hood/tinwork, wiring, throttle/choke cables, exhaust, and PTO)
- Extra parts and fluids (oil, filter, fuel filter, clamps, hardware)
- Condition of the tractor (rusted fasteners, damaged wiring, worn pulleys)
Typical installed cost breakdown
| Cost item | Typical range | What it covers |
|---|---|---|
| Replacement engine | $400 to $1,900 | Most of the total cost; varies by spec and availability |
| Labor | $200 to $700 | Commonly 3 to 7 hours depending on complexity |
| Misc. parts and supplies | $25 to $200 | Oil, filter, fuel line/clamps, hardware |
| Optional “while-you’re-there” parts | $0 to $400 | Belts, battery service, pulleys, blades |
How to confirm the correct engine before buying
Your tractor and your engine have separate model numbers. Use these steps so you order the right replacement:
- Find the tractor model plate (commonly under the seat)
- Find the engine model and spec numbers on the engine (often on the blower housing)
- Compare crankshaft and PTO details (diameter, length, keyway, threaded end)
- Check wiring and charging connector style
- Use the maintenance and identification notes in the 917252540 owner’s manual
Before replacing the engine: quick checks that often fix “won’t start”
Many no-start complaints are electrical, fuel, or safety-interlock related, not a failed engine:
- Recharge/replace the battery; clean and tighten terminals
- Check the fuse and all wiring connections
- Test the ignition switch and starter solenoid
- Verify fresh fuel and replace the fuel filter if restricted
- Confirm the brake/clutch and attachment (PTO) safety switches are working
For a fast no-crank diagnosis, use riding lawn mower engine wont turn over or click video.
Why it matters
An engine swap is one of the highest-cost repairs on a riding mower. Verifying the engine ID and ruling out battery, wiring, solenoid, and fuel issues prevents buying the wrong engine or replacing an engine that is still serviceable.
Last updated: February 2026
How to look up Craftsman model number?
For a Craftsman riding lawn tractor like model 917252540, 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 match the correct diagrams, parts, and service procedures in the 917252540 owner's manual.
Where to find the model and serial number
On Craftsman model 917252540, the identification plate is located under the seat.
- Park on a flat surface, set the parking brake, and turn the key off
- Lift the seat up and look on the frame area directly underneath
- Write down the model number and the serial number exactly as shown
- Keep the numbers with your maintenance records for future parts ordering
- If the plate is dirty, wipe it clean so every digit is readable
Tractor model number vs. engine model number
This tractor has two different model numbers, and both can matter when ordering parts.
| What you are identifying | Where to find it | Why it matters |
|---|---|---|
| Tractor model number (example: 917252540) | Plate under the seat | Matches chassis, mower deck, steering, belts, and most tractor parts |
| Engine model number (example: CV15-41519) | Blower housing on the engine | Matches engine-specific parts like ignition and fuel system components |
Why it matters
Using the exact model number prevents ordering the wrong belt, blade, or steering part. For example, deck and drive components can vary by tractor model, even within the Craftsman lineup.
Quick tip for parts lookups
If you are shopping for common wear items, match the part to your diagrams after confirming the model number. For instance, a 42-inch deck setup may use a specific blade such as the husqvarna lawn tractor mulching blade, 21-in 532134149 depending on the deck configuration.
Last updated: February 2026
Is it worth replacing a lawn mower engine?
Yes, replacing the engine on your Craftsman lawn tractor model 917252540 is worth it when the tractor’s deck, steering, and transmission are solid and the total engine-swap cost stays well below the cost of a comparable replacement tractor. If the deck is rusted through or multiple major systems are failing, replacement is the better value.
Quick decision checklist
- The mower deck is structurally sound (no cracks, severe rust-through, or broken welds)
- The transaxle drives smoothly and does not slip or whine excessively
- Wiring and safety interlocks are intact (no recurring no-crank issues)
- You can do basic maintenance safely (spark plug wire off before service)
- You can source the correct belts, blades, and wear parts for ongoing upkeep
Cost and value guide (typical)
Use this as a practical way to decide before you buy an engine.
| Scenario | What we typically recommend | Why |
|---|---|---|
| Engine failed, tractor otherwise in good shape | Replace the engine | Lowest total cost, keeps a known-good chassis |
| Engine failed and deck needs major work too | Consider replacing the tractor | Two big repairs usually exceed the value |
| Multiple drive and deck problems (belts, mandrels, pulleys) | Repair only if you want a project | Labor and parts add up quickly |
Related repairs that affect the decision
If the engine is out, it is smart to inspect common wear items that impact cut quality and reliability:
- Deck drive belt condition and routing (cracks, glazing, stretching)
- Blade condition and balance (bent blades cause vibration)
- Mandrel play or noise (worn bearings can ruin a new belt)
For this model, examples of deck-related parts you may already be replacing include the lawn tractor drive belt 532144200 and the husqvarna lawn tractor mandrel assembly 532130794.
Why it matters
A new engine only pays off if the rest of the tractor can safely run it. The manual stresses keeping hardware tight, keeping the machine clear of debris, and never servicing with the engine running; those basics prevent repeat failures and overheating-related damage. See the maintenance and safety sections in the 917252540 owner's manual.
Last updated: February 2026
What are the parts of a lawn mower engine?
On the Craftsman lawn tractor model 917252540, the engine is made up of fuel, air, ignition, and lubrication/cooling systems working together. Key engine parts include the air screen and air filter, spark plug and ignition module, flywheel and stator, and crankcase/oil pan components (see the 917252540 owner's manual).
Main engine systems and common parts
These are the core groups you will see listed in the engine parts diagrams and maintenance sections:
- Fuel system: fuel tank, fuel line, carburetor
- Air intake: air filter, air screen (grass screen), intake shrouds
- Ignition and electrical: ignition switch, ignition module (coil), spark plug, flywheel, stator, wiring/kill lead
- Starting system: battery, starter, solenoid (varies by configuration)
- Lubrication and crankcase: crankcase, oil pan, seals, gaskets
- Cooling and exhaust: blower housing, cooling fins/shrouds, muffler (and spark arrester if equipped)
Parts called out in the 917252540 engine documentation
The manual for this tractor includes a Kohler engine section (CV15S) with an ignition/electrical parts list. Examples include:
- Spark plug
- Ignition module
- Flywheel assembly
- Stator assembly
- Grass screen
Quick reference table
| System | What it does | Common symptoms when it fails |
|---|---|---|
| Fuel | Delivers gas to the engine | Cranks but will not start, surging |
| Air intake | Keeps dirt out, feeds clean air | Black smoke, loss of power |
| Ignition | Creates spark at the right time | No-start, misfire |
| Cooling/exhaust | Controls heat, routes exhaust | Overheating, loud exhaust |
Why it matters
Knowing which system a symptom points to helps you troubleshoot faster and avoid engine damage. For example, the manual notes that a blocked air screen or dirty cooling fins can cause overheating and engine damage, so keeping those areas clean is a high-impact maintenance step.
Last updated: February 2026
What engine does Craftsman riding mower use?
For Craftsman lawn tractor model 917252540, the tractor is equipped with a 14.5 HP OHV Kohler engine (as identified in the model’s documentation and decals list). For the exact engine family and service specs (oil type, tune-up items, adjustments), use the 917252540 owner's manual.
How to confirm the engine on your tractor
We recommend verifying the engine using the tractor and engine ID tags so you get the right maintenance and repair parts.
- Check the engine shroud for a Kohler label and the model/spec numbers
- Look for the engine ID plate (often near the valve cover or blower housing)
- Match the tractor model tag to Craftsman 917252540
- Use the manual’s Repair parts - engine section to cross-reference engine components
- If the engine has been replaced, rely on the engine model/spec number, not just the tractor model
Common tune-up and service items tied to the engine
Even when the tractor model is the same, the correct service parts depend on the engine’s exact model/spec.
| Service item | What it affects | When to check |
|---|---|---|
| Spark plug | Starting, misfire | Each season or hard starting |
| Air filter | Power, fuel use | Dusty mowing, loss of power |
| Fuel system (fresh gas, filter) | No-start, surging | After storage or stale fuel |
| Muffler condition | Noise, backfire | Excess noise or damage |
Why it matters
The engine brand and horsepower determine the correct maintenance schedule, adjustment procedures, and many engine repair parts. Using the engine ID (Kohler model/spec) prevents ordering the wrong ignition, fuel, or tune-up components.
Last updated: February 2026
What year was Craftsman model 917252540 made?
Craftsman lawn tractor model 917252540 was made across a production run (not a single year). The exact build year for your specific tractor is determined from the serial number plate under the seat, which is the identifier the manufacturer uses to tie your unit to a date. See the 917252540 owner's manual for the plate location and recording details.
How to find the build year on your tractor
Use the ID plate information to pinpoint the year your specific 917252540 was built.
- Park on a level surface, set the parking brake, and remove the key.
- Lift the seat and locate the model/serial plate under the seat.
- Write down the serial number exactly as shown.
- Record the date of purchase if you still have it (helpful for service history).
- Use the serial number to match the tractor to its production date (Sears parts lookup or service reference).
What you will see on the ID plate
The plate typically lists the model number plus a unique serial number.
| Plate item | What it tells you | Why it helps |
|---|---|---|
| Model number (917252540) | The tractor family/configuration | Ensures you are using the right parts diagrams |
| Serial number | Your tractor’s unique identifier | Used to determine the build date and correct revisions |
| Date of purchase (your record) | When you bought it | Helps estimate age if the serial is unreadable |
Why it matters
Craftsman tractors often have mid-run part changes (belts, pulleys, steering parts, electrical items). Knowing the build year tied to the serial number helps us match the correct replacement parts the first time.
Last updated: February 2026
