Owner’s manual
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How much does it cost to replace a riding lawn mower engine?
For a Craftsman riding tractor like model 917259560, a complete engine replacement typically runs about $600 to $2,500 total (engine plus labor). The biggest cost drivers are the exact engine model, whether you replace related wear parts, and shop labor time.
What makes the price go up or down
- Engine type and horsepower: higher HP and certain engine families cost more.
- New vs. rebuilt: rebuilt engines can cost less but vary by condition.
- Extra parts replaced at the same time: belts, pulleys, wiring, or fuel parts.
- Labor time: riding tractor engine swaps commonly take around 4 to 8 hours.
- Shipping and shop fees: pickup, disposal, and delivery can add cost.
Parts you may replace during an engine swap
Even if the engine is the main issue, we often see these items addressed during the job:
- Starter electrical components such as the solenoid 532146154
- Deck drive wear items such as the lawn tractor drive belt 532144200
- Hardware that gets removed and reinstalled (nuts, retainers)
- Fuel line and filter (common maintenance items)
- Battery and cables (if cranking is weak)
Quick cost breakdown (typical ranges)
| Cost item | Typical range | Notes |
|---|---|---|
| Engine (replacement) | $400 to $2,000 | Varies most by engine model and availability |
| Labor | $300 to $900 | Often 4 to 8 hours depending on shop rate |
| “While you’re in there” parts | $0 to $250 | Belts, solenoid, hardware, battery cables |
Why it matters
On a riding mower, an engine replacement can approach the value of the tractor. Getting the engine model number first helps you price the correct engine and avoid buying parts that will not fit.
Where to find the engine model number
Your tractor model number 917259560 is typically found under the seat, and the engine model number is typically found on the blower housing. Those locations are shown in the owner's manual.
Last updated: February 2026
What engine does Craftsman riding mower use?
The Craftsman riding mower model 917259560 uses a Briggs & Stratton engine; the parts list in the manual references an engine wiring harness labeled for B&S (Briggs & Stratton). For the exact engine model and specifications (HP, displacement, type), match the engine ID numbers shown in the owner's manual.
How to identify the exact engine on model 917259560
Use the engine’s ID tag to confirm the precise Briggs & Stratton engine model and type.
- Look for the engine model, type, and code stamped on the blower housing or valve cover area
- Record all numbers exactly as shown (including dashes)
- Compare those numbers to the engine information section in the owner's manual
- Use the engine ID when ordering tune-up parts (spark plug, air filter, fuel filter)
- If the tractor has been repowered, the engine ID tag is the only reliable match point
What we can confirm from the manual (and what it means)
The manual’s repair parts section lists an engine harness described as “Harness Engine B&S…”, which indicates this tractor was built around a Briggs & Stratton engine family.
Engine details: what’s typically included vs. what varies
| Item | Typically consistent | Varies by exact engine model |
|---|---|---|
| Brand | Briggs & Stratton | No |
| Mounting and controls | Tractor-specific | Sometimes |
| HP rating | Not fixed | Yes |
| Carburetor and ignition parts | Not fixed | Yes |
Why it matters
The exact engine model determines the correct maintenance parts and settings. Using the wrong spark plug, air filter, or belt routing information can cause hard starting, poor performance, or premature wear.
Related parts you may need during engine or starting repairs
If your issue is clicking or no-crank, these model-matched parts are commonly involved:
- Solenoid 532146154 (starter solenoid)
- Battery cables, fuses, and interlock switches (listed in the manual’s electrical section)
- Deck and drive components that can add load if misrouted (for example, lawn tractor drive belt 532144200)
Last updated: February 2026
Is it worth replacing a lawn mower engine?
Yes, replacing the engine on your Craftsman 917259560 front-engine lawn tractor is worth it when the tractor’s deck, steering, and drive system are solid and you want more years of reliable service. If the tractor has widespread wear or major deck and drivetrain issues, putting that money toward a replacement tractor is usually the better value.
Quick decision checklist
- The deck shell is straight (no cracks/rot) and the spindles are serviceable
- The tractor drives and stops correctly (brake works and transaxle feels strong)
- You can still get common wear parts (belts, blades, pulleys, electrical)
- The engine swap cost is clearly less than a comparable replacement tractor
- You are comfortable with DIY mechanical work and safe lifting
What to inspect before you spend money
Use this as a fast condition check; it helps you avoid installing a new engine on a tractor with hidden problems.
| Area to check | What “good” looks like | What pushes you toward replacement |
|---|---|---|
| Mower deck and spindles | Deck is solid; blades spin smoothly | Deck is damaged; spindle/mandrel issues everywhere |
| Drive system | Moves consistently; belt routing is stable | Slipping, noise, or major drivetrain wear |
| Electrical starting | Clean connections; consistent crank | Repeated no-crank issues beyond basic wiring |
| Overall chassis | Tight steering; no major frame damage | Multiple worn systems at once |
Parts and maintenance that often go with an engine swap
Even with a new engine, worn deck and drive components can hurt performance. These are common “while you’re in there” items for this model:
- Replace a worn blade drive belt such as lawn tractor drive belt 532144200
- Inspect idlers and replace if noisy or loose (for example lawn tractor blade idler pulley 532139245)
- Check blade/spindle condition; a worn spindle can require a mandrel such as husqvarna lawn tractor mandrel assembly 532130794
- Use the blade type listed for the tractor; a compatible option is husqvarna lawn tractor mulching blade, 21-in 532134149
Why it matters
A new engine only pays off if the tractor can safely cut and drive afterward. The manual emphasizes keeping blade attachment bolts tight, keeping the machine free of debris buildup, and disconnecting the spark plug wire before repairs; those basics protect your investment and help prevent repeat failures. See the safety and maintenance sections in the owner's manual.
Last updated: February 2026
