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What model number is a Craftsman 6.75 lawn mower?
“Craftsman 6.75” by itself is not a single model number; it describes the engine horsepower used on many different Craftsman walk-behind mowers. The model number you need is printed on the mower’s model tag, and it will look like a 9-digit number (often starting with 917). For reference, our page here is for Craftsman tractor model 917270631, which is a different product type than a 6.75-hp walk-behind mower.
Where to find the model number on a Craftsman 6.75 mower
Check the model tag first; that tag is the only reliable way to match the correct parts list.
- Look on the rear of the mower deck near the discharge chute
- Check under the seat area on self-propelled models with a rear cover
- Look near the engine mounting area on top of the deck
- If the tag is dirty or faded, wipe it clean and use a flashlight at an angle
What the model number usually looks like
Most Craftsman walk-behind mower model numbers are 9 digits and commonly start with 917. You may also see a format with a dot (example: 917.XXXXXX).
| What you see | What it means | Use it for |
|---|---|---|
| “6.75” | Engine rating (not a model) | General identification only |
| 917XXXXXX (or 917.XXXXXX) | Mower model number | Parts lookup and diagrams |
| Engine model/type/code | Engine identification | Engine-specific tune-up parts |
Why it matters
Parts like belts, blades, wheels, and pulleys vary by deck size and drive system, even when the engine rating is the same. Using the exact model number prevents ordering the wrong blade or ground drive belt.
Related info for this Craftsman 917270631 tractor page
If you are actually working on Craftsman 917270631 (42-inch deck tractor), the owner's manual lists the model and includes parts diagrams. Common deck-related parts shown for this tractor include the husqvarna lawn tractor mulching blade, 21-in 532134149 and the lawn tractor drive belt 532144200.
Last updated: February 2026
What year is my Craftsman mower serial number lookup?
On Craftsman lawn tractors like model 917270631, the model number identifies the tractor family, but the build year is determined from the product’s serial number/date code on the ID label. Use the date-code format shown in the owner's manual section for identification and recordkeeping.
Where to find the serial number (ID label)
We typically see the ID label in one of these spots on a front-engine Craftsman rider:
- Under the seat pan or on the seat bracket area
- On the rear fender pan near the seat
- On the frame rail (left or right side)
- Near the engine compartment on the chassis
How to decode the year from the serial/date code
Many Craftsman-built riding mowers use a date code embedded in the serial number that reads as MMDDYY (month, day, year). When your label uses that format:
- First 2 digits = month
- Next 2 digits = day
- Last 2 digits = year
Quick examples
| Date code | Interprets as | Build date |
|---|---|---|
| 072811 | MMDDYY | July 28, 2011 |
| 031506 | MMDDYY | March 15, 2006 |
| 112203 | MMDDYY | November 22, 2003 |
If your serial number does not match MMDDYY
Some labels use a different pattern (letters mixed with numbers, or a longer code). In that case, we use these checks to narrow it down:
- Confirm the model number is 917270631 (it should match exactly)
- Compare the tractor’s decal set and equipment to the parts diagrams in the manual
- Match common wear parts (deck belt, blades, mandrel parts) to the parts list for your model
If you are servicing the mower deck while you identify the build date, common deck-related parts for this model include the lawn tractor drive belt 532144200 and the husqvarna lawn tractor mulching blade, 21-in 532134149.
Why it matters
Knowing the correct build year helps us match the right parts diagram and avoid ordering the wrong belt, blade, mandrel assembly, or steering components for your Craftsman tractor.
Last updated: February 2026
How much does it cost to replace a riding lawn mower engine?
Replacing the engine on a Craftsman front-engine lawn tractor like model 917270631 typically costs $260 to $1,800 for the engine plus labor. Most riding-mower engine swaps are billed at about 4 to 8 labor hours, with the total driven mainly by engine price and any extra parts needed.
What drives the total cost
- Engine cost: new vs. rebuilt, horsepower, crankshaft size, and mounting pattern
- Labor hours: removal, transfer of pulleys and wiring, and setup
- Extra parts and supplies: oil, filter, spark plug, fuel line, clamps, hardware
- Related wear found during teardown: belts, pulleys, wiring, battery cables
- Setup and testing: throttle/choke linkage adjustment and safety checks
Typical cost breakdown
| Cost item | Typical range | What it covers |
|---|---|---|
| Engine (part) | $150 to $1,400 | Engine assembly matched to shaft size and mounting |
| Labor | $200 to $600 | Commonly 4 to 8 hours depending on access and rust |
| Misc. parts and supplies | $20 to $200 | Fluids, tune-up items, small hardware |
| Estimated total | $260 to $1,800 | Most jobs land mid-range when no surprises show up |
Before you replace the engine, rule out common “no-start” causes
The troubleshooting chart in the 917270631 owner's manual focuses first on starting-system checks that often solve a “clicks but won’t start” complaint.
- Recharge or replace the battery; clean and tighten terminals
- Check the fuse and inspect wiring connections for looseness or corrosion
- Verify the brake, seat, and PTO safety interlock switches are operating
- Test the starter solenoid and starter motor
If the tractor clicks but won’t crank, a failed solenoid is a common fix; this model’s parts list includes the solenoid 532146154 (part number 145673).
Why it matters
An engine replacement is one of the highest-cost repairs on a riding mower. Confirming the battery, wiring, and solenoid first can prevent replacing a good engine and can restore reliable starting faster.
Last updated: February 2026
What engine does Craftsman riding mower use?
Craftsman riding mower model 917270631 uses a Briggs & Stratton 2-cylinder (V-twin) gasoline engine. The exact engine model, type, and code are printed on the engine ID label; match that information to the specifications section in the 917270631 owner's manual.
How to identify the exact engine on model 917270631
Use the engine ID label so you get the right tune-up specs and parts.
- Locate the engine model/type/code label (commonly on the valve cover, blower housing, or near the starter)
- Write down the full model/type/code exactly as shown
- Confirm the tractor model tag reads 917270631
- Use the engine ID when selecting spark plug, air filter, fuel filter, and oil specs
- Keep the engine ID with your maintenance records for faster parts matching
What “2-cylinder (V-twin)” means for service
A V-twin riding mower engine typically has stronger torque and smoother operation than a single-cylinder; it also has a few extra maintenance touchpoints.
- Expect two spark plugs (one per cylinder)
- Air filtration and cooling-fin cleaning are critical to prevent overheating
- Battery, cables, and starter circuit condition strongly affect starting performance
Quick reference: what to verify vs. what is typical
| Item | Verify on your mower | Why it matters |
|---|---|---|
| Engine model/type/code | Engine ID label | Ensures correct tune-up parts and settings |
| Spark plug count | Engine layout (V-twin) | Helps you buy the correct quantity and type |
| Starting circuit parts | Tractor wiring/parts diagrams | Speeds up no-crank diagnosis |
Related part that often affects starting
If the engine clicks but does not crank, the starter solenoid is a common checkpoint on riding tractors.
Why it matters
The engine’s model/type/code determines the correct maintenance parts and specifications (oil type and capacity, spark plugs, air filter, and some electrical components). Matching by engine ID prevents ordering the wrong parts.
Last updated: February 2026
