Owner’s manual
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How much does it cost to replace a riding lawn mower engine?
For a Craftsman riding lawn tractor like model 917271743, a full engine replacement typically costs $260 to $1,800 installed, depending on the engine, labor rates, and whether related items (belts, pulleys, wiring) also need service. Plan on roughly 6 labor hours for a riding mower engine swap.
- Engine type and horsepower (exact replacement vs. repower option)
- Labor rate at the shop and local market pricing
- Extra parts needed during the swap (belts, hardware, electrical parts)
- Condition of the tractor (rusted fasteners, damaged mounts, worn pulleys)
- Fuel system cleanup if old fuel or debris contributed to the failure
| Cost item | Typical range | Notes |
|---|---|---|
| Engine (part) | $200 to $1,400 | Biggest variable; depends on exact spec match |
| Labor | $200 to $600 | Often around 6 hours total |
| Misc. parts and shop supplies | $20 to $200 | Belts, nuts, wiring repairs, fluids |
Many “dead engine” symptoms are actually starting or safety-interlock issues. Your manual notes the engine should only start with the brake fully depressed and the attachment clutch disengaged, and the engine should shut off if the operator leaves the seat under certain conditions. Use the owner's manual to confirm the correct start and interlock behavior.
- Battery condition and cable connections
- Blown fuse or loose/damaged wiring
- Starter solenoid operation (a click with no crank is common)
- Safety interlock switches (seat switch, brake switch, PTO/attachment clutch switch)
- Fuel quality and basic tune-up items
If you’re hearing clicking or getting cranking with no start, follow the steps in riding lawn mower engine clicks but doesnt turn over video and riding lawn mower engine spins but wont start video.
Replacing an engine is one of the highest-cost repairs on a riding mower. Verifying the battery, solenoid, wiring, and safety interlocks first can prevent an unnecessary engine purchase and get your 917271743 back to mowing faster.
Last updated: February 2026
What engine does Craftsman riding mower use?
The Craftsman riding mower model 917271743 uses a 17.5 HP, low-emissions engine (as specified in the model’s documentation). For the exact engine make/model and service details (oil type, tune-up specs, and adjustments), use the 917271743 owner's manual.
Even within the same tractor model, the engine’s brand and full model code are confirmed by the engine ID label (not the tractor model number). We recommend checking:
- The engine shroud or valve cover label for the engine model/type/code
- The tractor frame tag for the Craftsman model 917271743
- The 917271743 owner's manual for maintenance intervals and operating specs
- Your parts diagrams when ordering engine-related items (filters, belts, ignition parts)
Based on the owner’s manual for this specific model, these core specs are called out:
| Item | What you’ll see for 917271743 |
|---|---|
| Engine output | 17.5 HP |
| Starting system | Electric start |
| Mower deck size | 42-inch |
| Engine design note | Low-emissions engine (operates differently than older designs) |
Using the correct engine identification prevents ordering the wrong tune-up parts and helps you follow the right maintenance schedule. It also matters for troubleshooting starting issues, because the correct wiring, solenoid, and safety interlock setup depends on the exact engine configuration.
If you are diagnosing a no-start or click-no-crank issue, these model-matched items are commonly involved:
- Ignition key: molded ignition key 532140403
- Starter circuit switching: solenoid with brass plunger 532146154
- For step-by-step help: riding lawn mower engine clicks but doesnt turn over video
Last updated: February 2026
Is it worth replacing a lawn mower engine?
Yes, replacing the engine on your Craftsman 917271743 lawn tractor is worth it when the tractor’s deck, chassis, steering, and drive system are still solid and you want more years of reliable mowing. If multiple major systems are worn out, putting that money toward a replacement tractor is the better value.
- The mower deck is straight (no cracks, severe rust-through, or major impact damage)
- The tractor still drives normally (no slipping, loss of drive, or chronic belt issues)
- Steering and brakes feel safe and controllable
- You can still get the maintenance and wear parts you need
- The engine failure is isolated (not caused by repeated overheating, debris buildup, or neglected maintenance)
Use this simple comparison to decide where your money goes.
| Option | Best when | Typical downside |
|---|---|---|
| Replace engine | Deck and drivetrain are in good shape; you want to keep this tractor | Higher up-front cost; time for swap and setup |
| Repair existing engine | Problem is minor (starter circuit, fuel delivery, tune-up items) | May not solve internal wear or low compression |
| Replace tractor | Deck/chassis/drivetrain are also worn; you want a fresh start | Higher total cost; setup and learning a new machine |
Many no-start or no-crank complaints are electrical or fuel related, not a failed engine.
- Check safety interlocks and wiring connections
- Verify battery condition and cable connections
- Inspect the starter solenoid and key switch circuit
- Confirm fuel flow; replace the in-line fuel filter once each season
- Do basic tune-up items (spark plug each season or every 100 hours, whichever comes first)
For model-specific maintenance intervals and safety guidance (including avoiding adjustments with the engine running), use the owner's manual.
An engine swap can extend the life of a good tractor, but it does not fix worn deck components, loose mandrels, or drive issues. If your cut quality is poor or the deck vibrates, you may also be looking at blade and mandrel service, not just engine work.
Last updated: February 2026
