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Is it worth replacing a lawn mower engine?
Yes, replacing the engine on your Craftsman 917271740 front-engine lawn tractor is worth it when the mower deck, transmission, steering, and frame are in solid shape and the total engine swap cost stays well below the cost of a comparable replacement tractor. If the tractor has multiple worn systems, replacement usually makes more sense.
Quick decision checklist
- The deck shell is not rusted through and the spindles are not loose or seized
- The transmission drives smoothly forward and reverse without slipping
- Steering is tight enough to track straight (no severe play)
- You can do the work (or pay labor) without exceeding your budget
- You plan to keep the tractor for several more seasons
Cost and effort: what to compare
Engine replacement is a bigger project than typical maintenance, so we recommend comparing total cost, not just the engine price.
| Item to compare | Engine replacement | Replace the tractor |
|---|---|---|
| Upfront cost | Engine + tune-up parts + possible belts/blades | Full purchase price + tax |
| Time | 1 day to a weekend for DIY | Same day |
| Risk | Fitment, wiring, fuel issues | Low |
| Long-term value | Great if chassis is strong | Best if multiple systems are worn |
Parts that often get replaced at the same time
If you are investing in an engine, it is smart to refresh wear items that affect cut quality and drivability.
- Lawn tractor ground drive belt, 1/2 x 82-in 532140294 if the tractor slips, squeals, or the belt is glazed
- Husqvarna lawn tractor mulching blade, 21-in 532134149 if the cut is ragged or the blade is bent
- Molded ignition key 532140403 if the key is worn, cracked, or intermittently loses contact
Why it matters
A new engine can restore reliability and power, but it will not fix a worn deck, weak transmission, or loose steering. When the rest of the Craftsman 917271740 is healthy, an engine swap can extend the tractor’s useful life for years.
Last updated: January 2026
What engine does Craftsman riding mower use?
For the Craftsman riding mower model 917271740, the exact engine make and model varies by build and prior repairs, so we identify it by checking the engine ID tag on your tractor. Once you match that ID, you can confidently buy the correct tune-up and drive parts for your mower.
How to identify the engine on model 917271740
Look for the engine identification label, then record the key numbers.
- Lift the hood and look on the blower housing, valve cover, or near the starter
- Write down the model, type, and code (common on Briggs & Stratton)
- If it is a Kohler engine, record the model and spec numbers
- Compare the numbers to the parts diagrams for your tractor and engine
- If the label is missing, use the tractor’s deck size, frame style, and pulley/belt layout to narrow it down
Parts that often get replaced regardless of engine brand
Even when the engine brand differs, many wear items on a front-engine lawn tractor are deck or drive related.
- Lawn tractor ground drive belt, 1/2 x 82-in 532140294
- Molded ignition key 532140403
- Husqvarna lawn tractor mandrel assembly 532130794
- Lawn tractor blade idler spring 532169022
Quick symptom-to-system guide
| What you notice | Most likely system | What to check first |
|---|---|---|
| Engine cranks slowly | Starting/battery | Battery charge, cables, solenoid connections |
| Engine cranks but will not start | Fuel/ignition | Fresh fuel, spark plug, air filter |
| Blades will not engage | Deck drive | Belt routing, idler spring tension, mandrel condition |
| Tractor will not move | Ground drive | Drive belt wear, pulley condition, linkage adjustment |
Why it matters
The engine ID is the only reliable way to get the correct engine-specific parts (carburetor, air filter, spark plug, starter). Using the tractor model alone can lead to mismatched parts if the engine was changed or produced in multiple variants.
For step-by-step starting diagnostics, use riding lawn mower engine spins but wont start video.
Last updated: January 2026
Who makes Craftsman push mower engines?
Craftsman push mower engines are typically supplied by major small-engine manufacturers, most commonly Briggs & Stratton, with some models using Kohler or Kawasaki engines depending on the mower and year. For your Craftsman model 917271740 (a front-engine lawn tractor), engine parts and fit are best confirmed by matching the engine model and type on the tractor itself.
How to identify who made your Craftsman engine
Look for the engine ID label, then match it to the manufacturer.
- Check the engine shroud (top cover) for a sticker or stamped tag
- Record the engine brand (for example, Briggs & Stratton, Kohler, Kawasaki)
- Write down the engine model, type, and code/spec numbers
- Use those numbers when ordering ignition, fuel, and tune-up parts
- If the label is missing, check the valve cover area or blower housing for stamped numbers
What you will usually see by manufacturer
| Engine maker | Where the ID is commonly found | What the ID often looks like |
|---|---|---|
| Briggs & Stratton | Blower housing or valve cover area | Model / Type / Code |
| Kohler | Valve cover or side of block | Model / Spec / Serial |
| Kawasaki | Side of engine near muffler or starter | Model / Spec / Serial |
Why it matters
Craftsman is the equipment brand, but the engine maker controls the correct carburetor, air filter, spark plug, starter, and ignition parts. Using the engine ID prevents wrong-part returns and helps troubleshooting (no-start, hard-start, surging).
Parts and DIY help that often apply
- If you need a replacement key for starting, use the molded ignition key 532140403
- For common starting symptoms (clicks, no crank, spins but will not start), follow riding lawn mower engine spins but wont start video
Last updated: January 2026
How much does it cost to replace a riding lawn mower engine?
For a Craftsman riding lawn tractor like model 917271740, replacing the engine typically costs about $260 to $1,800 installed, depending on the engine type, labor rates, and whether related drive or deck parts also need service.
What drives the total price
- Engine cost (new, rebuilt, or used)
- Labor time (engine swaps on riding tractors take longer than walk-behind mowers)
- Extra parts often replaced during the job (belts, pulleys, hardware)
- Shop fees and pickup/delivery (varies by area)
- Condition of the tractor (rusted fasteners, worn wiring, damaged mounts)
Typical cost breakdown
| Cost item | Typical range | Notes |
|---|---|---|
| Engine (part only) | $200 to $1,400 | Varies by horsepower, shaft size, charging system |
| Labor | $150 to $600 | Often 4 to 8 hours depending on layout and corrosion |
| “While you’re in there” parts | $20 to $250 | Belts, pulleys, nuts, springs, key |
| Total installed | $260 to $1,800 | Common real-world range |
Parts that commonly get inspected or replaced during an engine swap
Even when the engine is the main issue, we often see wear in the drive and deck system that is easiest to address while everything is accessible.
- Lawn tractor ground drive belt, 1/2 x 82-in 532140294 (cracks, glazing, slipping)
- Engine pulley 532140186 (wobble, worn bore, damaged keyway)
- Molded ignition key 532140403 (worn key causing intermittent start)
- Blade drive components (idler spring, mandrel parts) if the deck was noisy or vibrating
Why it matters
An engine replacement only pays off if the rest of the tractor is solid. If the transmission, steering, deck mandrels, or wiring are also failing, the total repair cost can exceed the value of the mower.
Quick decision guide
- Replace the engine if the deck and transmission are in good shape and you want several more seasons.
- Repair instead if the issue is fuel, spark, or safety interlocks (many “bad engine” symptoms are not engine failures).
- Consider replacement if multiple major systems are worn and you are facing repeated repairs.
Last updated: January 2026
