How much does it cost to replace a riding lawn mower engine?
For a Craftsman riding lawn tractor like model 917258901, a full engine replacement typically costs about $800 to $2,500 installed (engine plus labor and shop supplies). The biggest price drivers are engine type, whether the crankshaft matches your existing setup, and labor time.
- Engine (new): $500 to $1,800
- Labor: $300 to $900 (often 4 to 8 hours)
- Extras (common add-ons): $0 to $300 (belts, fuel line, battery, blades, tune-up parts)
| Cost item | Typical range | Notes |
|---|---|---|
| Replacement engine | $500 to $1,800 | Varies by horsepower, brand, and crankshaft specs |
| Labor | $300 to $900 | Higher if rusted fasteners or wiring issues |
| Misc. parts and supplies | $0 to $300 | Fuel system cleanup and wear items are common |
- Crankshaft size and length (must match your pulley and PTO setup)
- Wiring and charging system compatibility (stator/regulator connections)
- Fuel system condition (old fuel can require tank and line cleanup)
- Deck and drive wear (a slipping belt or noisy pulleys can add cost)
- Shop rate and turnaround time in your area
- The engine has low compression, a thrown rod, or severe internal damage
- The crankshaft is bent and damages pulleys repeatedly
- You have repeated failures after carburetor and ignition repairs
- It cranks but will not start (often fuel, spark, or safety interlocks)
- It clicks but will not turn over (battery, starter, solenoid, wiring)
- It runs but surges or stalls (carburetor, air filter, stale fuel)
A good first diagnostic step is to follow riding lawn mower engine spins but wont start video.
An engine swap is one of the highest-cost repairs on a riding mower. Confirming the starting and safety-interlock issues first can prevent replacing an engine when the real problem is electrical, fuel-related, or a worn drive component.
Last updated: January 2026
Who makes Craftsman engines?
Craftsman engines are made by several manufacturers, depending on the specific tractor and engine family; for Craftsman riding mowers like model 917258901, the engine supplier is commonly Briggs & Stratton, Kohler, or Kawasaki (it varies by model and production run).
The most reliable way is to read the engine identification label on the engine itself (not the tractor frame tag).
- Look for an engine brand badge on the blower housing (Briggs & Stratton, Kohler, Kawasaki).
- Find the engine model and type/spec numbers on the engine label.
- Match those numbers to the engine maker’s format (each brand uses a distinct model/spec layout).
- If the label is missing, check for casting marks and the carburetor/air box style as clues.
- Use the tractor model number 917258901 to cross-check parts diagrams and engine-related parts.
| Engine maker | Typical label info to look for | What it affects most |
|---|---|---|
| Briggs & Stratton | Model, Type, Code | Tune-up parts, ignition, carburetion |
| Kohler | Model, Spec, Serial | Charging system, fuel system, governor parts |
| Kawasaki | Model, Spec, Serial | Carburetor parts, ignition modules, filters |
Knowing the engine manufacturer helps you buy the correct maintenance and repair parts (spark plug, air filter, fuel parts) and troubleshoot starting or stalling issues accurately.
Even before you confirm the engine maker, these tractor-side parts are common culprits on riding mowers:
- Ignition switch 532140301 if the key switch is intermittent or has no crank in START
- Switch.pto.3 582107601 if the PTO safety circuit prevents cranking or kills spark
- Battery cables, fuse, and starter solenoid (not shown in the parts list above)
If the engine clicks or won’t turn over, follow riding lawn mower engine clicks but doesnt turn over video. If it spins but won’t start, use riding lawn mower engine spins but wont start video.
Last updated: January 2026
What engine does Craftsman riding mower use?
Craftsman riding mower model 917258901 uses a Kohler 2-cylinder gasoline engine rated at 22.5 HP with 624 cc displacement. To order the right tune-up parts or diagnose a no-start, match your engine’s model and spec numbers from the engine ID label.
Use the engine’s ID tag so you get the correct air filter, spark plugs, and fuel system parts.
- Find the Kohler ID label on the engine shroud, valve cover, or near the starter
- Write down the engine model, spec, and serial numbers
- Compare those numbers when selecting maintenance parts (filter, plug, oil)
- If the label is dirty, wipe it clean and take a photo for reference
- Keep the tractor model tag (917258901) handy for chassis and deck parts
If the engine will not crank, will not start, or the blades will not engage, these model-compatible electrical parts are common checks.
- Lawn tractor ignition switch 532140301
- Switch.pto.3 582107601
- Battery terminals and ground connection (clean, tight, corrosion-free)
- Seat, brake, and PTO safety interlock switches (proper adjustment)
| Symptom | What it usually points to | What we check first |
|---|---|---|
| Clicks but will not crank | Battery or starter circuit | Battery charge, cables, solenoid signal |
| Cranks but will not start | Fuel or ignition | Fresh fuel, choke, spark at plug |
| Starts then dies when brake released | Safety interlock issue | Brake/seat switch operation and adjustment |
| Engine runs but blades will not engage | PTO electrical or clutch | PTO switch output, clutch power at connector |
This model’s 22.5 HP Kohler V-twin uses different tune-up and ignition components than single-cylinder engines. Confirming the engine ID label first prevents ordering the wrong parts and speeds up troubleshooting.
Last updated: January 2026
Is it worth replacing a lawn mower engine?
Yes. Replacing the engine on your Craftsman riding tractor model 917258901 is worth it when the chassis, mower deck, steering, and transmission are in solid shape and the total swap cost stays well below the cost of a comparable replacement tractor. If the job approaches about half the price of a new tractor, replacement usually makes more sense.
- Deck shell is not rusted through; spindles are not loose or noisy
- Transmission drives smoothly forward and reverse without slipping
- Steering tracks straight without severe play
- You can do the labor yourself or have a shop you trust
- Engine, hardware, and labor total is clearly lower than a new tractor
- PTO engagement and wiring: A failing PTO switch or damaged harness can mimic engine problems; check the switch.pto.3 582107601 if PTO engagement is intermittent.
- Deck drive components: Worn idlers and pulleys cause belt slip and poor cutting; inspect the lawn tractor idler pulley 532139245 for wobble, noise, or a seized bearing.
- Fuel system condition: Old fuel varnish and leaks cause hard starting; inspect the husqvarna lawn tractor fuel tank 532151346 for cracks, seepage, and a plugged vent.
| Item you may need | Why it matters | Typical impact |
|---|---|---|
| Belts, pulleys, idlers | Prevents slip and vibration after the swap | Medium |
| Fuel line, filter, clamps | Helps prevent leaks and lean running | Low to medium |
| Battery and cables | Ensures reliable cranking | Medium |
A new engine restores power and reliability, but it will not fix underlying deck, drive, or electrical problems. Checking the tractor’s core systems first prevents spending engine money on a machine that still will not mow or drive correctly.
- Riding lawn mower engine clicks but doesnt turn over video
- Riding lawn mower engine spins but wont start video
Last updated: January 2026





