Owner’s manual
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What engine does Craftsman riding mower use?
The Craftsman lawn tractor model 917273393 uses a Briggs & Stratton single-cylinder engine, specifically Briggs model 31H777, type 0297-E1. We recommend confirming the exact engine ID from the engine label and the parts breakdown in the owner's manual.
How to confirm the engine on model 917273393
Use these quick checks to match what is on your tractor to the correct engine model:
- Look for the engine ID label on the engine shroud or valve cover area.
- Match the Briggs model number and type number exactly (both matter for parts).
- Compare your engine label to the engine parts list in the manual.
- If your tractor has been repowered, always use the engine label, not the tractor model.
- Record the numbers before ordering ignition, carburetor, or fuel system parts.
Engine identification details (from the manual)
| Item | What you will see | What it means |
|---|---|---|
| Tractor model | 917273393 | Identifies the Craftsman tractor chassis and deck system |
| Engine model | 31H777 | Identifies the Briggs & Stratton engine family |
| Engine type | 0297-E1 | Identifies the exact configuration used on this tractor |
Why it matters
The engine model and type determine the correct tune-up and fuel system parts (carburetor components, spark plug, air filter, fuel line routing). Using only “Craftsman 917273393” can lead to mismatched engine parts if the type number is different.
Related maintenance tip
If you are stocking up for seasonal service, blades are common wear items on this tractor’s 42-inch deck. For example, you can match your cutting setup to a blade style such as the lawn tractor 42-in deck high-lift blade 532138971.
You can also search by model number and order parts through Sears PartsDirect.
Last updated: February 2026
What year is my Craftsman mower serial number lookup?
For Craftsman lawn tractor model 917273393, the model number does not contain the build year. To determine the year, we use the product serial number from the tractor’s ID tag; the date is encoded in the serial format shown in the 917273393 owner's manual.
Where to find the serial number
Look for the ID tag in common locations on a front-engine Craftsman riding mower:
- Under the seat on the fender pan
- On the frame rail near the engine
- Near the rear axle or transaxle area
- Under the hood near the dash tower
How the serial number date code is typically read
Many Craftsman riding mower serial numbers use a 6-digit date code that reads:
- First 2 digits = month
- Next 2 digits = day
- Last 2 digits = year
Example
If the serial begins with 072811, that decodes to:
| Serial date code | Month | Day | Year |
|---|---|---|---|
| 072811 | 07 | 28 | 2011 |
That example would mean July 28, 2011.
Quick checks to avoid a wrong year
Before you lock in the year, we recommend these quick validations:
- Confirm you are reading the serial number, not the model number (917273393)
- Write down the first 6 digits exactly as printed
- If the code gives an impossible date (like month 19), the mower may use a different serial format
- Compare the decoded year with the tractor’s features (42-inch deck, electric start, 6-speed transaxle) listed in the 917273393 owner's manual
Why it matters
Knowing the correct build year helps you match the right Craftsman parts and diagrams for maintenance items like blades, belts, and deck hardware. For example, this model’s 42-inch deck uses blades such as the husqvarna lawn tractor mulching blade, 21-in 532134149 and the lawn tractor 42-in deck high-lift blade 532138971.
Last updated: February 2026
Where can I find my lawn mower engine model number?
On your Craftsman lawn tractor model 917273393, the engine model number is listed in the tractor documentation and also appears on the engine itself. In the 917273393 owner's manual, the engine is identified as a Briggs engine model 31H777 (type 0297-E1).
Where to look on the tractor and engine
We use these common locations on front-engine riding lawn tractors like the 917273393:
- Owner’s manual: the engine model and type are shown in the engine breakdown section.
- Engine shroud/blower housing: look for a printed label or decal with the model and type.
- Valve cover area: some engines place an ID label nearby.
- Stamped metal on the engine: some Briggs V-twin engines also have numbers stamped into the metal.
- Frame tag (tractor model tag): this confirms the tractor model, which helps match the correct engine listing.
What numbers to write down
For parts lookup and correct tune-up parts, we recommend recording all of these:
- Engine model (example shown for this tractor: 31H777)
- Engine type (example: 0297-E1)
- Code/date (often a longer number that indicates build date)
| ID you find | What it tells us | Why it matters |
|---|---|---|
| Tractor model (917273393) | Which mower/tractor you own | Ensures correct chassis and deck parts |
| Engine model (31H777) | Engine family | Matches engine-specific parts |
| Engine type (0297-E1) | Exact engine configuration | Prevents ordering the wrong carburetor, ignition, or gasket parts |
Why it matters
The tractor model number (917273393) gets you the right Craftsman riding mower parts list, but the engine model and type are what keep you from mismatching engine parts like ignition components, fuel system parts, and gaskets.
Last updated: February 2026
How much does it cost to replace a riding lawn mower engine?
For a Craftsman riding lawn tractor like model 917273393, a full engine replacement typically runs $800 to $2,500 installed (engine plus labor). The total depends on engine type, whether you reuse pulleys and wiring, and how much teardown is required; confirm your exact engine specs in the 917273393 owner's manual.
What drives the total cost
- Engine price: Most replacement riding mower engines fall around $500 to $1,800.
- Labor time: Commonly 4 to 8 hours for a riding mower engine swap.
- Extra parts: Belts, pulleys, wiring repairs, fuel line, and hardware often add cost.
- Shop vs. DIY: DIY saves labor but still requires safe lifting, correct wiring, and proper throttle/choke setup.
- Condition of the mower: Rusted fasteners, damaged mounts, or worn deck components increase time.
Quick cost ranges (typical)
| Scenario | What’s included | Typical total |
|---|---|---|
| DIY engine swap | Engine + your time | $500 to $1,800 |
| Shop replacement (straightforward) | Engine + 4 to 6 labor hours | $800 to $2,200 |
| Shop replacement (complex) | Engine + 6 to 8 labor hours + extras | $1,500 to $2,500 |
Before you replace the engine
We recommend ruling out common “no-start” causes first; they can look like engine failure but are usually cheaper fixes:
- Weak battery or poor cable connections
- Bad starter solenoid (a common culprit; see solenoid with brass plunger 532146154)
- Safety interlock issue (seat switch, brake switch, PTO switch)
- Old fuel or clogged fuel filter
- Ignition or spark plug problems
A good next step is our riding lawn mower engine spins but wont start video to narrow the problem quickly.
Why it matters
An engine replacement can cost close to the value of an older lawn tractor. A short diagnosis first helps you avoid replacing the engine when the real issue is electrical, fuel-related, or a safety circuit problem.
Last updated: February 2026
What are the common problems with Craftsman lawn mowers?
Common problems on the Craftsman 917273393 front-engine lawn tractor are no-start or no-crank conditions, loss of power, excessive vibration, uneven cutting, and mower blades that will not rotate. Most issues trace back to fuel quality, airflow, ignition, belt and mandrel wear, or safety interlock operation; see the owner's manual troubleshooting chart for model-specific checks.
Most common symptoms and what usually causes them
- Engine will not crank or only clicks: weak battery, dirty terminals, loose wiring, or a failed starter solenoid
- Loss of power: dirty air filter, low or dirty oil, stale fuel, clogged fuel filter, fouled spark plug, debris buildup under the deck
- Excessive vibration: worn, bent, or loose blade; bent mandrel; loose or damaged hardware
- Poor cut (uneven): deck not level, grass buildup under the deck, bent mandrel, worn blade
- Blades will not rotate: obstruction in clutch mechanism, worn mower drive belt, frozen idler pulley, frozen blade mandrel
Quick checks we recommend first (fast, high-impact)
- Fuel: drain stale gas and refill with fresh gasoline; replace the fuel filter if flow is restricted.
- Air and spark: clean or replace the air filter; clean and regap or replace the spark plug.
- Deck condition: clean packed grass from the underside of the mower housing and around mandrels.
- Battery and cables: recharge the battery, clean terminals, and confirm tight cable connections.
- Blades and hardware: inspect blades for bends and tightness; replace damaged blades and tighten fasteners.
Parts that commonly solve cutting and vibration complaints
| Symptom | What to inspect | Example part on this model page |
|---|---|---|
| Uneven cut or poor discharge | Blade condition and correct blade type | Lawn tractor 42-in deck high-lift blade 532138971 |
| Excessive vibration | Bent blade or mandrel issues | Husqvarna lawn tractor mandrel assembly 532130794 |
| Poor mulching or ragged cut | Blade edge and blade style | Husqvarna lawn tractor mulching blade, 21-in 532134149 |
Why it matters
On riding mowers like the Craftsman 917273393, small maintenance issues (stale fuel, clogged airflow, grass buildup, loose blades) quickly turn into hard starting, weak power, and unsafe vibration. Keeping the deck clean and the blades and mandrels in good shape also protects belts, pulleys, and spindles.
If you are ordering parts, match by model number and diagram, then purchase from the parts list for Craftsman 917273393 or search by model on Sears PartsDirect.
Last updated: February 2026
