Owner’s manual
Is it worth replacing a lawn mower engine?
Replacing the engine on your Craftsman lawn tractor model 917274970 is worth it when the tractor is otherwise in solid shape (deck, transmission, steering) and you want several more seasons of reliable mowing. If multiple major systems are worn out, putting that money toward a replacement tractor is usually the better value.
- Worth it if the tractor has a solid frame, good transmission, and a straight mower deck
- Not worth it if it also needs major deck rebuild, steering repairs, or transmission work
- Worth it if you can do most labor yourself and only pay for parts
- Not worth it if you will pay shop labor for engine swap plus several other repairs
- Worth it if you already maintain it well (clean cooling areas, seasonal tune-ups)
Use your 917274970 owner's manual to confirm safety checks and maintenance items, then inspect these high-cost areas:
| Area to check | What to look for | Why it matters |
|---|---|---|
| Transmission/drive | Slipping, no movement, loud whining | A second major repair can exceed the tractor’s value |
| Mower deck/mandrels | Excess vibration, wobble, damaged housings | Deck rebuild costs add up fast |
| Wiring/safety interlocks | No-crank issues, intermittent shutoff | Engine swap will not fix electrical faults |
| Cooling/overheating signs | Packed grass screen, dirty fins, heat damage | Overheating can shorten engine life quickly |
A practical rule: if the engine replacement total (engine + any required hardware + labor) is more than about 50% of the cost of a comparable replacement tractor, replacement is usually the smarter move.
An engine swap can restore power, starting reliability, and mowing performance, but it does not correct common cut-quality and deck issues like worn blades, an unlevel deck, or a worn drive belt. The manual also emphasizes keeping cooling areas clean to prevent overheating-related engine damage.
Last updated: January 2026
Who makes Craftsman engines?
For the Craftsman lawn tractor model 917274970, the engine manufacturer depends on the specific engine installed on the tractor; Craftsman has commonly used engines from Briggs & Stratton, Kohler, and Kawasaki across different riding mower and tractor models. The fastest way to confirm yours is to match the engine ID and spec numbers shown on the engine label to the information in the 917274970 owner's manual.
Look for the engine identification label (usually on the blower housing, valve cover area, or near the starter). Then record:
- Engine brand name (often printed large on the shroud)
- Model number
- Type/spec number (or spec code)
- Code/date (helpful for parts lookups)
- Horsepower and displacement (if listed)
Craftsman riding tractors like the 917274970 have historically been equipped with engines from a few major manufacturers.
| Engine brand | What the label often shows | Why it matters for parts |
|---|---|---|
| Briggs & Stratton | Model, Type, Code | Tune-up parts and carburetor kits are brand-specific |
| Kohler | Model, Spec, Serial | Filters, ignition parts, and charging components vary by spec |
| Kawasaki | Model, Spec, Serial | Fuel system and ignition parts are matched to spec number |
The engine maker determines the correct maintenance parts (air filter, oil filter, spark plug), adjustment procedures, and troubleshooting steps. Even tractors with the same deck size can use different engines, so confirming the engine label prevents ordering the wrong parts.
These are common tractor parts customers replace during ownership (not engine-specific), and they can help with starting and operation issues:
- Molded ignition key 532140403 (if the key is worn or missing)
- Switch.pto 582107601 (if the PTO will not engage)
- Lawn tractor ignition harness 532170238 (if you have intermittent no-start due to wiring)
Last updated: January 2026
What engine does Craftsman riding mower use?
The Craftsman lawn tractor model 917274970 uses a low-emission gasoline engine and is sold as a 22.0 HP, single-cylinder garden tractor with electric start (as shown in the model’s documentation). For the exact engine make and model (Briggs & Stratton, Kohler, etc.), match the engine ID label on your engine to the specifications in the 917274970 owner's manual.
Use these quick checks to confirm the engine manufacturer and model family:
- Look for the engine ID label on the blower housing, valve cover, or near the starter
- Record model, type, and code (common on Briggs & Stratton) or spec number (common on Kohler)
- Compare those numbers to the engine section in the 917274970 owner's manual
- If the label is missing, use the tractor’s build information and parts diagrams to narrow it down
- Avoid ordering ignition or fuel parts by “HP only”; engine families can share horsepower ratings
The documentation for model 917274970 confirms key engine-related details that matter for operation and service:
| Item | What you can rely on for 917274970 | Why it matters |
|---|---|---|
| Engine type | Low-emission gas engine | Affects starting, tuning, and emissions-related adjustments |
| Output class | 22.0 HP | Helps match belts, deck load, and tune-up expectations |
| Starting system | Electric start | Points you toward battery, solenoid, and safety interlock checks |
The exact engine make and model determines the correct tune-up parts (spark plug, air filter, fuel filter), oil type, and troubleshooting steps for no-start or hard-start problems. It also helps you avoid buying the wrong ignition or carburetor parts.
If your issue is more about starting or blade engagement than the engine itself, these model-matched parts are commonly involved:
- Molded ignition key 532140403 (lost key, worn key, intermittent start)
- Switch.pto 582107601 (blades will not engage, engine stalls when engaging PTO)
- Lawn tractor ignition harness 532170238 (no crank, intermittent electrical connection)
Last updated: January 2026
How much does it cost to replace a riding lawn mower engine?
Replacing the engine on a Craftsman lawn tractor model 917274970 typically costs $900 to $3,000+ installed. The total depends on the replacement engine price (new vs. rebuilt), labor time for a riding tractor swap, and any extra parts needed to finish the job.
- Replacement engine: $600 to $2,000+
- Labor: $300 to $1,000+ (often 4 to 8 labor hours)
- Fluids and small parts: $25 to $150 (oil, filter, fuel line, clamps, hardware)
- Optional shop fees: pickup, delivery, disposal, diagnostics
| Cost item | Typical range | What changes the price |
|---|---|---|
| Engine | $600 to $2,000+ | New vs. rebuilt, availability, horsepower/shaft specs |
| Labor | $300 to $1,000+ | Rusted fasteners, wiring, exhaust, PTO and pulley transfer |
| Supplies | $25 to $150 | Oil, filter, fuel filter, clamps, sealants |
| Total installed | $900 to $3,000+ | Combination of the above |
To price the job accurately for model 917274970, match the replacement engine to the tractor’s exact configuration.
- Engine identification numbers on the engine itself (model, spec, serial)
- Crankshaft diameter and length (must match your pulleys and PTO)
- Charging system and wiring connector style
- Muffler and exhaust layout
- Throttle and choke linkage compatibility
We recommend using the 917274970 owner's manual for the correct identification locations and service guidance, and then matching the engine specs to the replacement.
An engine swap is one of the highest-cost repairs on a riding mower. If other wear items also need attention, such as a slipping deck belt or a weak PTO engagement, the total investment can rise quickly. For example, a worn riding lawn mower blade drive belt 532148763 can add parts and labor if it is replaced during the same service.
Last updated: January 2026
