How much does it cost to replace a riding lawn mower engine?
For a Craftsman riding lawn tractor model 917254322, a full engine replacement typically runs about $800 to $2,500 installed (parts plus labor). The biggest cost drivers are the engine brand/horsepower, whether it is a direct bolt-in swap, and any extra repairs found during the job.
What makes the price go up or down
- Engine cost: Most replacement riding mower engines land around $500 to $1,800 depending on specs.
- Labor time: Commonly 4 to 8 hours for a riding mower engine swap.
- Extra parts: Belts, pulleys, wiring, fuel lines, battery, and deck-drive components may need attention.
- Shop rates: Local labor rates and pickup/delivery can add a lot.
- Fitment complexity: Throttle/choke linkage, exhaust routing, and crankshaft size must match.
Quick cost breakdown (typical ranges)
| Cost item | Typical range | Notes |
|---|---|---|
| Replacement engine | $500 to $1,800 | Varies by horsepower and crankshaft specs |
| Labor | $300 to $900 | Often 4 to 8 hours |
| Misc. parts/fluids | $50 to $300 | Oil, filter, fuel filter, clamps, hardware |
| Total installed | $800 to $2,500 | Most common real-world range |
Before you replace the engine, check these common “not an engine” causes
We recommend ruling out starting and drive issues first because they can mimic a bad engine and cost far less to fix:
- Weak battery or bad battery cables/grounds
- Failed starter solenoid (a common no-crank cause) such as the lawn tractor starter solenoid 582042802
- Safety interlock switch problems (seat, brake, PTO)
- Fuel delivery issues (old fuel, clogged filter)
- Ignition harness damage
Why it matters
An engine replacement is one of the highest-cost repairs on a riding mower. Confirming the real failure (no compression, thrown rod, seized crankshaft) helps you avoid paying for an engine when the fix is a solenoid, wiring, or tune-up.
Last updated: January 2026
What engine does Craftsman riding mower use?
For Craftsman lawn tractor model 917254322, the engine varies by the exact build and engine family installed on the tractor. The most reliable way to identify it is to read the engine ID label on the engine shroud or valve cover, then match that information when ordering tune-up and starting parts.
How to identify the engine on model 917254322
Look for an engine label (often on the blower housing, valve cover, or near the starter). Record these items:
- Engine manufacturer (commonly Briggs & Stratton, Kohler, or Tecumseh on older units)
- Engine model number
- Type and trim code (or spec number)
- Code/date (helps confirm the exact version)
Once you have those numbers, you can select the correct air filter, spark plug, fuel filter, and starter components.
Quick checks that help confirm you have the right engine info
- Compare the label numbers to what is stamped or printed on the engine tag
- Verify the throttle and choke linkage style matches your engine family
- Confirm the starter mounting and wiring layout before ordering electrical parts
- If the tractor cranks slowly or only clicks, test the battery and cables first
A common no-start symptom on riding mowers is a weak battery or a failing solenoid. If you are troubleshooting a click-no-crank condition, the lawn tractor starter solenoid 582042802 is one of the parts often involved.
Common engine-related symptoms and what they usually point to
| Symptom | Most common cause | What to check first |
|---|---|---|
| Clicks but won’t crank | Low battery, bad solenoid, poor cable connection | Battery voltage, terminals, solenoid |
| Cranks but won’t start | Fuel issue, stale gas, ignition issue | Fresh fuel, spark, air filter |
| Starts then dies | Safety switch, fuel delivery, carburetor | Interlocks, fuel flow |
For step-by-step troubleshooting, use riding lawn mower engine clicks but doesnt turn over video.
Why it matters
Craftsman model numbers identify the tractor chassis and configuration, but engine families can differ across production runs and replacements. Using the engine label prevents ordering the wrong tune-up parts and reduces downtime during mowing season.
Last updated: January 2026
What are the parts of a lawn mower engine?
A Craftsman lawn tractor engine like model 917254322 is built around fuel delivery, air intake, ignition, and rotating internal parts that convert combustion into power. The exact layout varies by engine family, but the major components and what they do are consistent across most riding mowers.
Main engine components (what they do)
- Fuel tank and fuel line: stores fuel and feeds it to the engine
- Carburetor (or fuel injection): mixes fuel with air for combustion
- Air filter and intake: keeps dirt out of the engine
- Ignition system (spark plug, ignition coil, flywheel magnets): creates spark at the right time
- Starter system (starter motor, solenoid, battery): cranks the engine to start
- Engine block/crankcase: houses internal parts and engine oil
- Internal rotating parts (crankshaft, connecting rod, piston, valves): create power and motion
Related tractor parts people often confuse with “engine parts”
On a riding mower, some “engine problems” are actually in the starting or drive systems.
| System | Common parts | What you notice when it fails |
|---|---|---|
| Starting | battery, wiring, solenoid | clicking, no crank, slow crank |
| Fuel/air | fuel line, carburetor, air filter | cranks but will not start, surging |
| Drive | belt, pulleys, idlers | engine runs but tractor will not move |
| Mower deck | blades, mandrels, deck belt | poor cut, vibration, belt squeal |
Parts on this model that support starting and mowing
These are not internal engine parts, but they are common fixes when the tractor will not start or the mower deck will not cut correctly:
- Lawn tractor starter solenoid 582042802
- Husqvarna lawn tractor ignition harness 532401098
- Husqvarna lawn tractor ground drive belt, 1/2 x 97-1/2-in 532194346
Why it matters
Knowing which system you are troubleshooting helps you buy the right part the first time. For example, a single click with no crank often points to the solenoid or battery circuit, while cranking with no start usually points to fuel, spark, or air flow.
For step-by-step diagnosis, use riding lawn mower engine clicks but doesnt turn over video or riding lawn mower engine spins but wont start video.
Last updated: January 2026





