Is it worth replacing a lawn mower engine?
Yes, replacing the engine on your Craftsman 917259330 front-engine lawn tractor is worth it when the tractor chassis and 42-inch mower deck are solid, you want to keep the machine you already know, and the engine cost stays well below the cost of replacing the entire tractor.
- Replace the engine if the deck shell is not rusted through and the spindles and pulleys are serviceable.
- Replace the engine if the transmission and steering feel normal (no slipping, severe play, or binding).
- Replace the engine if you can do basic wrenching and follow the safety steps in the Craftsman 917259330 owner's manual.
- Consider replacing the whole tractor if the deck, steering, and belts all need major work at the same time.
- Consider replacing the whole tractor if the engine swap plus other repairs approaches about half the cost of a comparable new riding mower.
A good engine on a worn-out tractor still leaves you with poor cut quality and ongoing repairs. Check these common wear areas first:
| Area to check | What “good” looks like | What pushes you toward replacement |
|---|---|---|
| Mower deck and spindles | Deck is straight, no cracks, blades spin smoothly | Deck rust-through, noisy spindle/mandrel bearings |
| Belts and pulleys | Belts track straight, no glazing | Frequent belt throwing, bent pulleys |
| Steering and front end | Tracks straight, manageable play | Excessive slop, hard steering, worn linkage |
| Electrical and safety switches | Starts consistently, safety system works | Intermittent no-crank, bypassed switches |
If your cut is already uneven or the deck is noisy, plan on deck service along with the engine. On this model, common deck-drive wear items include the lawn tractor drive belt 532144200 and the husqvarna lawn tractor mandrel assembly 532130794.
An engine swap is a big investment of time and money. When the rest of the Craftsman 917259330 is in good condition, a new engine can extend the tractor’s useful life for years; when the deck and drivetrain are worn out, you can end up paying twice.
- Disconnect the spark plug wire before any service to prevent accidental starting.
- Never make adjustments or repairs with the engine running.
- Keep blade and deck hardware tight; blades are sharp, so use gloves when handling them.
Last updated: January 2026
How much does it cost to replace a riding lawn mower engine?
Replacing the engine on a Craftsman riding lawn tractor like model 917259330 typically costs about $260 to $1,800 installed, depending on the engine brand, horsepower, and whether you also replace related wear items (belts, pulleys, wiring). Plan on around 6 labor hours for a full engine swap.
- Engine cost: new replacement engines vary widely by horsepower, shaft size, and charging system
- Labor time: engine removal, transfer of pulleys/brackets, wiring, and test run
- Extra parts: worn belts, pulleys, or hardware often get replaced during the job
- Shop rates: local labor rates and pickup/delivery fees
- Condition issues: stripped mounting bolts, damaged wiring, or fuel system contamination add time
| Cost item | Typical range | Notes |
|---|---|---|
| Replacement engine | $200 to $1,400 | Biggest variable; must match crankshaft specs |
| Labor | $200 to $600 | Often around 6 hours total |
| Misc. parts and supplies | $20 to $200 | Belts, fasteners, fuel line, oil, filter |
| Estimated total | $260 to $1,800 | Common real-world range |
Your tractor model number is under the seat, but the engine has its own model number on the blower housing. We use both to match the correct replacement. The 917259330 owner's manual explains where to find these IDs.
If the tractor has high hours, replacing drive components during the engine swap helps prevent repeat downtime:
- Ground drive belt (if cracked or glazed), such as a v-belt 532138255
- Blade drive belt (if slipping), such as a lawn tractor drive belt 532144200
- Idler pulley (if noisy or wobbly)
An engine replacement only pays off when the rest of the tractor is solid. If the deck, transaxle, or steering has major wear, putting that money toward a different riding mower can be the better value.
Last updated: January 2026
What engine does Craftsman riding mower use?
The Craftsman riding mower model 917259330 uses a gas engine, but the engine brand and horsepower are not specified in the manual excerpts we have for this model. For the exact engine identification (model, type, and code), use the engine label and confirm it against the 917259330 owner's manual.
Use these checks to get the correct engine details before ordering parts or doing tune-up work:
- Look for the engine ID label on the engine shroud, valve cover, or blower housing
- Write down the engine model, type, and code (or serial number)
- Match those numbers when buying engine-specific parts (spark plug, air filter, carburetor parts)
- If the label is missing, use the tractor’s build information and engine features (starter, carburetor style) to narrow it down
- Keep the numbers with your maintenance records for faster parts lookup later
Engine identification affects common service items and troubleshooting steps:
- Tune-up parts (spark plug, air filter, fuel filter)
- Starting and charging issues (battery, starter, solenoid)
- Fuel and carburetor repairs
- Oil type and capacity guidance
- Governor and throttle/choke adjustments
| What you have | What it tells you | What to use for engine parts |
|---|---|---|
| 917259330 (tractor model) | Deck, chassis, drive system, and tractor diagrams | Use for mower deck belts, blades, steering, wheels |
| Engine model/type/code (on engine label) | Exact engine family and build | Use for carburetor, ignition, internal engine parts |
Many Craftsman tractors share similar frames and mower decks, but they can be built with different engines over time. Using the engine’s model/type/code prevents ordering the wrong tune-up or fuel-system parts and speeds up troubleshooting.
Last updated: January 2026





