What engine does Craftsman riding mower use?
For Craftsman lawn tractor model 917257561, the manual identifies it as an 18 HP Briggs & Stratton (B&S) engine configuration. For the exact engine family, type, and code used on your tractor, match the numbers on the engine label to the specifications in the 917257561 owner's manual.
Use the engine’s ID label (usually on the blower housing, valve cover area, or near the starter) and compare it to the manual’s engine section.
- Locate the Briggs & Stratton label and write down Model, Type, and Code
- Confirm the tractor model tag reads 917257561
- Check for decals that reference B&S and horsepower (common on hood/side panels)
- Use the manual’s parts and decal pages to cross-check what your tractor was built with
- If the label is missing, use the tractor’s build information and parts diagrams to narrow it down
| Item | What you’ll see | What it tells you |
|---|---|---|
| Horsepower rating | 18 HP (tractor configuration) | General power class for this model |
| Engine brand | Briggs & Stratton (B&S) | Manufacturer of the engine |
| Engine Model/Type/Code | Stamped/printed on engine label | Exact engine variant and production details |
The exact Briggs & Stratton Model/Type/Code determines the correct tune-up parts (spark plug, air filter, fuel filter), carburetor settings, and some service procedures. Using the tractor model alone can still leave multiple engine variants.
If you are doing seasonal service, follow the maintenance intervals and procedures in the 917257561 owner's manual so the engine starts easier and runs smoother.
Last updated: January 2026
How much does it cost to replace a riding lawn mower engine?
For the Craftsman lawn tractor model 917257561, engine replacement cost is usually driven by the engine price plus 4 to 8 hours of labor. Most owners spend about $600 to $2,500 total, depending on whether you install it yourself or hire a shop.
- Engine type and availability: this tractor uses an 18 HP twin-cylinder engine; the manual lists engine model 422707, type 1527-01, and exact replacements vary by supplier.
- Labor time: shops commonly book 4 to 8 hours for a riding mower engine swap (removal, transfer parts, alignment, test run).
- Extra parts you replace “while you’re in there”: belts, pulleys, fuel lines, battery, and tune-up items.
- Condition of mounting hardware: rusted bolts, damaged wiring, or worn pulleys add time.
- DIY vs. shop: DIY saves labor but requires safe lifting, tools, and careful wiring/fuel handling.
| Cost item | Typical range | Notes |
|---|---|---|
| Replacement engine | $300 to $1,800 | Biggest variable; match shaft size, charging system, and mounting pattern |
| Labor (shop) | $300 to $900 | Often 4 to 8 hours depending on complexity |
| Misc. parts/fluids | $25 to $200 | Oil, filter, fuel line, clamps, hardware |
| Optional “while apart” parts | $40 to $200+ | Belts, pulleys, battery, blades, etc. |
We recommend confirming the engine model information and doing a quick “is it really the engine?” check first.
- Verify the tractor model and engine model on the ID plates (tractor plate is under the seat; engine plate is on the blower housing).
- Check battery and cables; poor connections can mimic engine failure.
- If the engine clicks but will not crank, follow the steps in 917257561 owner’s manual.
- If the engine spins but will not start, focus on fuel delivery, spark, and air filter before committing to an engine.
An engine swap can cost close to the value of an older riding mower. Confirming the correct engine model and ruling out starting-system issues helps you avoid paying for an engine when a battery, wiring repair, or tune-up would fix the problem.
Last updated: January 2026
Is it worth replacing a lawn mower engine?
Yes, replacing the engine on your Craftsman lawn tractor model 917257561 is worth it when the tractor’s deck, frame, steering, and transmission are still solid and the total engine swap cost stays well below the cost of a comparable replacement tractor. If multiple major systems are worn out, replacing the tractor is the better value.
- The mower deck is not rusted through and still cuts evenly after leveling
- The drive system moves smoothly (no slipping, grinding, or loss of power)
- Steering and front axle components are tight (no excessive play)
- You can do basic service safely (spark plug wire disconnected before work)
- The engine failure is isolated (not caused by chronic overheating or severe neglect)
Use this simple comparison to decide where your money goes.
| Option | Best when | Typical downside |
|---|---|---|
| Replace engine (complete) | You want the fastest “like-new” powerplant | Highest parts cost |
| Replace short block | Top end is damaged but accessories are reusable | More teardown and setup |
| Replace tractor | Deck, belts, spindles, and steering also need work | Higher upfront cost |
A good chassis makes an engine swap pay off. We recommend checking these items first:
- Deck condition and spindle area; a worn mandrel can cause vibration and poor cut
- Blade drive components (belt, idlers, pulleys) for cracking, glazing, or wobble
- Fuel system condition (old fuel, varnish, leaking tank)
- Safety controls and interlocks; never bypass safety devices
Helpful parts that often get replaced during deck-related repairs include the v-belt 532138255 and the husqvarna lawn tractor mandrel assembly 532130794.
An engine swap only pays off if the rest of the tractor can reliably use that new power. A solid deck and drivetrain mean you get more seasons out of your Craftsman 917257561 without chasing repeated breakdowns.
For model-specific maintenance intervals, adjustment procedures, and safety steps (including disconnecting the spark plug wire before servicing), use the 917257561 owner’s manual.
Last updated: January 2026
What model number is a Craftsman 6.75 lawn mower?
A Craftsman “6.75” walk-behind mower does not have one universal model number; “6.75” is an engine power marking used across many different mower models. For the Craftsman lawn tractor model we support here, the model number is 917257561; use the 917257561 owner's manual to confirm where the tractor and engine model numbers are listed.
Use the mower’s model number (not the engine HP) to match the right blade, wheels, and drive parts.
- Look for a model/serial label on the mower deck (top or rear of the deck)
- Check the frame near the rear wheels or handle mounts
- Clean grass buildup off the deck before reading the label
- Write down the full model number exactly as shown (including dots or dashes)
- Record the serial number if it is present
This page is for a Craftsman front-engine lawn tractor, not a 6.75 walk-behind mower. The tractor model number is 917257561, and the manual notes the tractor model plate is located under the seat.
- Tractor model number: 917257561
- Engine model/type: listed on the engine blower housing
- Common tractor parts you may need include the molded ignition key 532140403 if the key is missing or damaged
| What you see | What it means | What to use for parts |
|---|---|---|
| 6.75 | Engine power marking | Not enough by itself |
| Model number (example format: 917.xxxxxx) | Identifies the mower/tractor | Use this to order parts |
| Engine model/type numbers | Identifies the engine | Use for engine-specific parts |
Using the exact mower model number prevents ordering the wrong blade, belt, or wheel parts; many Craftsman mowers can share the same “6.75” marking but use different components.
Last updated: January 2026





