How to identify a lawn mower engine?
On your Craftsman 917273360 front-engine lawn tractor, the engine ID is typically found on the engine shroud (sheet metal) near the muffler and air cleaner; look for a stamped or printed model-type-code label you can use to match the correct tune-up and repair parts. For exact label locations and diagrams for your tractor, use the owner's manual.
Where to look on the engine
Check these common spots first (wipe off grass and oil so you can read the stamp clearly):
- On the sheet metal shroud directly above the muffler (muffler can be on the right or left side)
- On the front of the engine near the air cleaner housing
- Near the blower housing or recoil starter area (if equipped)
- On a valve cover or near the spark plug wire routing clip
- On a sticker plate on the engine block, just below the shroud edge
What numbers you need (and what they mean)
Most small engines use a 3-part ID. Write it down exactly as shown.
| What you see on the engine | What it’s used for | Example format |
|---|---|---|
| Model | Identifies the engine family | 12A802 |
| Type / Spec | Identifies the exact build configuration | 1234-B1 |
| Code / Date | Helps match production changes | 99010123 |
Why it matters
The tractor model number (917273360) identifies the mower chassis and deck, but the engine model and type identify engine-specific parts like the air filter, spark plug, carburetor parts, and ignition components. Using the correct engine ID helps prevent ordering the wrong maintenance parts.
Related troubleshooting tip
If you are chasing a no-start or click-no-crank issue while you are identifying the engine, the manual’s safety interlock rules matter: the brake pedal must be fully depressed and the attachment clutch must be disengaged for the engine to start. If it only clicks, a common repair part is the starter solenoid; see solenoid with brass plunger 532146154.
Last updated: February 2026
What engine does Craftsman riding mower use?
For Craftsman lawn tractor model 917273360, the owner’s manual lists a Briggs single-cylinder engine; the engine breakdown specifies Briggs model 31C707-0230-E1. For tune-up and parts matching, we recommend confirming the engine model and spec numbers shown on the engine label and in the owner's manual.
Engine details for model 917273360
Here’s what we use to identify the correct engine and related parts for this tractor:
- Brand family: Briggs (as listed in the manual)
- Engine type: single-cylinder (typical for this series)
- Engine model (from the engine breakdown): 31C707-0230-E1
- Tractor configuration (from the manual cover): 42-inch mower deck, electric start, automatic transmission
| Item | What to look for | Why it matters |
|---|---|---|
| Engine model | 31C707-0230-E1 | Confirms the correct engine family and major components |
| Engine spec/type code | Stamped/printed on the engine label | Ensures the right carburetor, ignition, and tune-up parts |
| Tractor model number | 917273360 | Ensures chassis, deck, and drive parts match |
How to confirm the engine on your tractor
We recommend verifying the engine label on the engine shroud or valve cover area.
- Park on a flat surface and let the engine cool completely
- Lift the hood and locate the engine identification label
- Match the engine model first, then record the spec/type code
- Use the recorded numbers when selecting maintenance parts and diagrams
Why it matters
Many Craftsman tractors share similar frames and 42-inch decks, but engine spec/type codes can change the exact ignition, fuel, and governor components. Confirming 31C707-0230-E1 plus the spec/type code helps prevent ordering the wrong parts.
If you are shopping for common deck wear items while you are servicing the tractor, we often see customers replace blades at the same time; examples for this model’s 42-inch deck include the lawn tractor 42-in deck high-lift blade 532138971 and the husqvarna lawn tractor mulching blade, 21-in 532134149. You can also search by model number on Sears PartsDirect if you need additional engine-related parts not listed here.
Last updated: February 2026
How to find Craftsman parts?
For your Craftsman lawn tractor model 917273360, the fastest way to find the right replacement parts is to use the model-based parts list and diagrams, then match the part name and part ID to what’s on your tractor. For model-specific maintenance and part identification, use the owner's manual.
The best way to search (recommended)
- Start with your exact model number: 917273360 (this narrows results to the correct deck, drive, and chassis configuration).
- Use the parts diagrams to identify the assembly first (mower deck, steering, drive, electrical).
- Match the part by part name + part ID, not just by a description.
- Confirm fit by comparing your old part’s measurements and mounting style.
- If you are replacing wear items (blades, belts, filters), check the maintenance section for service intervals and specs.
Common parts customers replace on model 917273360
These are examples of parts available for this model that people commonly shop for:
| What you’re replacing | What it affects | Example part on this model page |
|---|---|---|
| Mower blade | Cut quality, mulching, discharge | Lawn tractor 42-in deck high-lift blade 532138971 |
| Ground drive belt | Tractor movement, slipping, no-drive symptoms | Lawn tractor ground drive belt, 1/2 x 82-in 532140294 |
| Starter solenoid | Clicking, no-crank electrical issues | Solenoid with brass plunger 532146154 |
| Ignition key | No-start due to lost/damaged key | Molded ignition key 532140403 |
Why it matters
Using the exact model number and diagram callouts helps prevent ordering a look-alike part that mounts differently or has the wrong length, which can cause poor cutting performance, belt throw-off, or starting problems.
When to use broader search
If you do not see what you need in the parts list for model 917273360, search by model number on Sears PartsDirect to locate additional diagrams, assemblies, and replacement parts.
Last updated: February 2026
What are common problems with Craftsman riding mowers?
Common problems on a Craftsman riding mower like model 917273360 fall into a few buckets: no-start or weak-crank issues (battery, wiring, solenoid), loss of power (fuel, spark, airflow), and cutting or drive complaints (belt, blades, deck buildup, mandrels). Our owner's manual troubleshooting chart points you to the fastest checks first.
Most common symptoms and what usually causes them
- Clicks but won’t crank: weak battery, poor cable connections, or a failing starter solenoid
- Cranks but won’t start: stale fuel, dirty fuel filter, fouled spark plug, clogged air filter
- Loss of power: dirty air screen/fins, clogged muffler, dirty fuel filter, carburetor out of adjustment
- Excessive vibration: worn or bent blade, loose blade bolt, bent mandrel
- Blades won’t rotate: obstruction in clutch mechanism, worn mower drive belt, frozen idler pulley, frozen blade mandrel
- Poor cut or poor discharge: deck not level, wet grass, low tire pressure, grass buildup under the deck or around mandrels
Quick checks we recommend before buying parts
- Set throttle to FAST for mowing; slow throttle can mimic power loss.
- Inspect fuel: drain and refill with fresh gasoline if it smells sour or looks dark.
- Check the air filter and cooling fins; restricted airflow causes bogging.
- Look under the deck for packed grass; buildup can clog deck venting around mandrels.
- Inspect belts for glazing, cracking, or slack.
Parts that commonly solve these problems (when worn)
| Problem area | What to inspect | Example part for this model |
|---|---|---|
| No-crank/clicking | Solenoid connections, corrosion, weak pull-in | Solenoid with brass plunger 532146154 |
| Loss of drive | Ground drive belt wear or breakage | Lawn tractor ground drive belt, 1/2 x 82-in 532140294 |
| Poor cut/vibration | Bent or worn blades | Lawn tractor 42-in deck high-lift blade 532138971 |
Why it matters
Catching simple issues early (stale fuel, clogged airflow, deck buildup, loose wiring) prevents hard starting, overheating, uneven cutting, and premature belt or mandrel wear. That saves time and protects the engine and deck components.
For model-specific procedures like deck cleaning, belt routing, and adjustment points, follow the steps in the owner's manual. If you need to order parts, use the parts list for model 917273360 or search by model number on Sears PartsDirect.
Last updated: February 2026
Is it worth replacing a lawn mower engine?
Replacing the engine on your Craftsman 917273360 front-engine lawn tractor is worth it when the tractor’s deck, chassis, steering, and transmission are still solid and the total engine-swap cost stays well below the cost of replacing the whole tractor. If the tractor has widespread wear (deck rust-through, loose steering, recurring belt or mandrel failures), replacement usually makes more sense.
Quick decision checklist
- The mower deck is structurally sound (no cracks, severe rust, or bent mounting points).
- The blade system is in good shape (no chronic vibration from bent mandrels or worn pulleys).
- The drive system is reliable (no slipping, burning belt smell, or frequent loss of motion).
- You can do the work safely (engine off for adjustments; follow all safety steps).
- The engine replacement cost is clearly less than a comparable replacement tractor.
What to inspect on model 917273360 before you buy an engine
Use the maintenance and safety guidance in the owner's manual to evaluate the tractor’s overall condition, then focus on these high-cost areas:
| Area to check | What “good” looks like | What pushes you toward replacement |
|---|---|---|
| Deck and discharge area | Deck is straight; discharge parts intact | Deck damage, missing/broken shielding, heavy corrosion |
| Blade and mandrel system | Smooth spin by hand (engine off); no wobble | Persistent vibration; bent mandrel symptoms |
| Drive and motion | Consistent movement; no belt squeal | Slipping, jerky motion, frequent belt issues |
| Safety interlocks | Starts and runs only under correct conditions | Bypassed or unreliable safety devices |
Parts that often get replaced along with engine-related repairs
If your tractor is otherwise in good shape, these common wear items can help you restore performance and cut quality:
- Solenoid with brass plunger 532146154 if you get a click-no-crank symptom.
- Lawn tractor ground drive belt, 1/2 x 82-in 532140294 if motion is weak or the belt is worn.
- Lawn tractor 42-in deck high-lift blade 532138971 if the cut is ragged or the blade is worn.
Why it matters
An engine swap can extend the life of a good Craftsman tractor for years, but it only pays off when the rest of the machine is safe and mechanically sound. The manual also emphasizes keeping safety devices working and avoiding adjustments with the engine running, which is especially important during major repairs.
You can order replacement parts for Craftsman 917273360 from the parts list for this model, or search by model number on Sears PartsDirect.
Last updated: February 2026





