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Where can I find the Craftsman riding mower model number?
On Craftsman lawn tractor model 9172736403, the model number is shown on the product identification label; our 9172736403 owner's manual lists it on the cover as Model No. 917.2736403. On most Craftsman riders, you can also find the ID label under the seat area or on the frame near the seat.
Where to look on the tractor
Check these common label locations first:
- Underside of the seat or the seat pan (lift the seat)
- Frame rails directly under the seat
- Rear fender area near the seat base
- Engine compartment side panel or near the battery tray
- Left or right side of the chassis, just ahead of the rear wheels
What the model number looks like
For this Craftsman rider, the model number is a 10-digit Sears-style number.
| Item | Example for this tractor | Why you need it |
|---|---|---|
| Model number | 9172736403 (often printed as 917.2736403) | Ensures parts diagrams match your exact build |
| Product type | Lawn tractor | Helps narrow parts categories (deck, steering, drive) |
Tips to avoid mix-ups when ordering parts
Use the model number exactly as printed on the label.
- Write down the full model number (all digits)
- If the label is dirty, wipe it clean and take a photo
- Match the mower deck size and configuration when selecting blades
- Use the parts list in the manual to confirm deck and blade style
Why it matters
Craftsman tractors can look similar across years, but parts like mower deck blades, mandrel assemblies, belts, and switches vary by model. Using 9172736403 helps us get you the correct diagrams and the right replacement parts the first time.
Last updated: February 2026
How much does it cost to replace a riding mower engine?
Replacing the engine on a Craftsman lawn tractor model 9172736403 typically costs $800 to $2,500 total (engine plus labor), depending on engine size, whether it’s a direct-fit replacement, and local shop rates. In many cases, fixing a no-start or power-loss issue costs far less than an engine swap.
Typical cost breakdown (engine replacement)
- Engine (new): $500 to $1,800
- Labor: $250 to $900 (often 2 to 6 hours)
- Shop supplies/incidentals: $25 to $100
- Optional add-ons: battery, belts, blades, tune-up parts (varies)
| Scenario | What you usually pay | Best fit when |
|---|---|---|
| Repair existing engine | $50 to $600 | It cranks, runs rough, or loses power intermittently |
| Used/rebuilt engine install | $400 to $1,500 | You want lower cost and accept some risk |
| New engine replacement | $800 to $2,500 | The engine is seized, has major internal damage, or is uneconomical to repair |
Before you replace the engine, check these common “engine” problems
The 9172736403 manual’s troubleshooting and maintenance schedule point to several issues that can mimic a bad engine, such as low/dirty oil, dirty air filter, stale fuel, and loose wiring. Use the 9172736403 owner’s manual to follow the correct checks and safety steps.
- Verify battery condition and cable connections
- Check engine oil level and oil condition
- Inspect/replace air filter and clean cooling fins/screens
- Replace spark plug and check plug wire fit
- Replace fuel filter and drain stale fuel if needed
- Inspect belts and deck load if the engine bogs under cutting
Why it matters
An engine replacement is one of the highest-cost repairs on a riding mower. A basic tune-up, fuel-system service, or correcting a heavy deck load (dull blades, belt drag, packed grass) often restores performance for a fraction of the cost.
Parts that can affect performance while mowing
If the tractor runs but struggles when the blades are engaged, deck components can add load and make it feel like the engine is failing. For example, worn blades or a binding mandrel can hurt cut quality and performance.
Last updated: February 2026
What are the parts of a lawn mower engine?
On the Craftsman lawn tractor model 9172736403, the engine system is made up of fuel, air, ignition, and mechanical components that work together to create combustion and turn the crankshaft; your controls (ignition switch, throttle/choke, clutch/brake) help you start and manage engine speed. For model-specific control locations and operating steps, use the 9172736403 owner's manual.
Core engine components (what they do)
- Fuel tank and fuel lines: store and deliver gasoline to the engine
- Fuel filter: traps debris before it reaches the carburetor
- Carburetor: mixes fuel and air for combustion
- Air filter: keeps dirt out of the intake (a dirty filter can cause hard starting and power loss)
- Spark plug and ignition system (coil, wiring, flywheel magnets): creates spark at the right time
- Starter system (starter motor/solenoid, battery, cables): cranks the engine to start
- Engine internals (crankcase, crankshaft, valves, piston): converts combustion into rotating power
Related tractor controls you will see on this model
These are not “inside the engine,” but they directly affect starting and operation on model 9172736403:
- Ignition switch: starts and stops the engine
- Throttle/choke control: helps start a cold engine and sets engine speed
- Clutch/brake pedal and parking brake lever: required for safe starting and stopping
- Attachment clutch switch (PTO switch): engages mower blades and attachments
| System | Main parts | Common symptom when there’s a problem |
|---|---|---|
| Fuel | tank, filter, carburetor | won’t start, runs rough, stalls |
| Air | air filter, intake | loss of power, black smoke |
| Ignition | spark plug, coil, wiring | no start, misfire |
| Starting/charging | battery, solenoid/starter, ammeter | clicking, slow crank |
Why it matters
Knowing which system is involved speeds up troubleshooting. For example, the manual’s troubleshooting chart ties no-start and loss of power to items like a dirty air filter, bad spark plug, weak battery, stale fuel, and wiring issues.
Last updated: February 2026
What kind of engine does a Craftsman riding lawn mower have?
The Craftsman lawn tractor model 9172736403 uses a low-emission engine and is rated at 18.5 HP with electric start and an automatic transmission. To identify the exact engine manufacturer and engine model, match the engine ID tag information to the specifications in the 9172736403 owner's manual.
What this model includes (confirmed)
These are the key powertrain details called out for Craftsman model 9172736403.
- 18.5 HP engine rating
- Low-emission engine design
- Electric start system
- Automatic transmission
- 42-inch mower deck
| Spec | Model 9172736403 |
|---|---|
| Engine rating | 18.5 HP |
| Engine design | Low-emission |
| Start type | Electric start |
| Transmission | Automatic |
| Deck size | 42 in. |
How to find the exact engine make and model on your tractor
Craftsman tractors commonly use an engine data label that lists the engine model and code; that label is what you use to get the correct tune-up parts.
- Park on level ground, set the parking brake, and remove the key
- Let the engine cool before touching the muffler or cylinder head area
- Open the hood and look for an engine ID label on the blower housing, valve cover, or near the starter
- Write down the engine model, type, and code (or serial number)
- Use those numbers to select the correct spark plug, air filter, and oil recommendations
Why it matters
The tractor model number (9172736403) tells us the deck size and drivetrain setup; the engine ID tag tells us the exact engine family. That is what ensures you buy the right maintenance parts and follow the correct tune-up specs.
Related DIY help for common engine symptoms
- Riding lawn mower engine clicks but doesnt turn over video
- Riding lawn mower engine spins but wont start video
- How to tune up a riding lawn mower video
Last updated: February 2026
