How much does it cost to replace a riding lawn mower engine?
For a Craftsman riding tractor like model 917276630, a full engine replacement typically costs $900 to $2,800 installed (engine plus labor). The biggest cost drivers are the engine type, whether you replace related wear items, and shop labor time; plan on about 4 to 8 labor hours.
What makes the price go up or down
- Engine type and horsepower (direct replacement vs upgraded engine)
- Crankshaft size and PTO configuration (must match your deck drive setup)
- Extra parts replaced at the same time (belts, pulleys, wiring)
- Condition of the mower (rusted fasteners, damaged mounts, worn deck spindles)
- Labor rate (varies by region and season)
Typical cost breakdown (installed)
| Cost item | Typical range | Notes |
|---|---|---|
| Replacement engine | $500 to $2,000 | Most of the total cost |
| Labor | $300 to $900 | Often 4 to 8 hours |
| Misc. parts and supplies | $50 to $250 | Fuel line, clamps, oil, filter, hardware |
Smart add-ons to consider during an engine swap
If the engine failed due to heavy load or poor cutting conditions, we often see deck and drive components that are also worn. These are common “while you’re in there” checks:
- Inspect the mower deck mandrels for play or noise; replace the lawn tractor mandrel housing 587819701 if a spindle is rough or loose
- Check the blade drive belt for cracking or glazing
- Spin idler pulleys by hand; replace any that feel gritty or wobble
- Verify battery cables and starting circuit connections (a weak start system can mimic engine problems)
- Confirm blades are correct and not bent (bent blades can cause vibration and damage)
Why it matters
A correctly matched engine protects the PTO, deck mandrels, and wiring from premature failure. The troubleshooting chart in the 917276630 owner’s manual also helps you rule out simpler issues (battery, solenoid, wiring, fuel) before paying for a full engine replacement.
Last updated: February 2026
How to look up Craftsman model number?
For a Craftsman riding mower like model 917276630, we look up the model number by finding the model and serial tag on the tractor, then using that exact model number when searching parts and manuals. On most Craftsman lawn tractors, the tag is on the frame under the seat or on the underside of the seat; confirm the exact location in the 917276630 owner's manual.
Where to find the model and serial number tag
Check these common spots first (engine off, key removed, parking brake set):
- On the frame directly under the seat
- On the underside of the seat pan
- Near the rear fender area close to the seat mounting points
- On the frame rail near the battery tray (less common)
How to use the model number to look up parts
Once you have the model number, use it exactly as printed (including dots or dashes if shown on the tag). For this tractor, the operator manual identifies it as 917.276630, and parts listings typically use 917276630.
- Enter the model number to pull up the correct Craftsman parts diagrams
- Match the part by name and diagram location before ordering
- Verify deck size and configuration (this model is a 42-inch mower deck)
Quick format guide
| Where you see it | Example for this tractor | What to type when searching |
|---|---|---|
| Operator manual cover | 917.276630 | 917276630 |
| Model tag | 917.276630 (typical) | 917276630 |
Why it matters
Using the exact model number prevents ordering the wrong blade, belt, or deck hardware. Even small model changes can affect fit, especially on 42-inch deck components like blades and mandrel parts.
If you are matching deck parts, confirm the deck configuration in the manual and then compare to the diagram before ordering items such as the lawn tractor mandrel housing 587819701.
Last updated: February 2026
What are the parts of a tractor engine?
On the Craftsman tractor model 917276630, the engine is built from core internal parts (like the cylinder, piston, crankshaft, and valves) plus supporting systems (fuel, ignition, lubrication, cooling, and starting). For your exact engine layout and service points, use the 917276630 owner's manual.
Main tractor engine parts (what they do)
- Cylinder block and cylinder head: form the engine’s main structure and combustion chamber
- Piston, piston rings, and connecting rod: convert combustion pressure into motion
- Crankshaft and bearings: turn piston motion into rotating power for the drivetrain and mower deck
- Camshaft, valves, valve guides, and springs: control air-fuel intake and exhaust flow
- Gaskets and seals: prevent oil, fuel, and compression leaks
- Flywheel: smooths engine rotation and supports ignition timing
Supporting systems you will service most often
These are the engine-related items that commonly affect starting, running, and power:
- Fuel system (tank, fuel line, carburetor): stale fuel can cause hard starting; fuel is best used within about 30 days
- Ignition system (spark plug, ignition switch, wiring): creates spark and controls shutoff
- Lubrication system (engine oil): correct grade and level prevents internal wear
- Air intake (air filter): keeps dirt out of the cylinder
- Starting system (battery, solenoid, starter): cranks the engine
If your tractor clicks but will not crank, the lawn tractor starter solenoid 582042802 is one of the common starting-circuit parts to check.
Quick reference: engine parts vs. what you notice
| What you notice | Most likely engine area | Common next step |
|---|---|---|
| Clicks but no crank | Starting circuit | Check battery cables, solenoid, safety switches |
| Cranks but will not start | Fuel or ignition | Verify fresh fuel, spark plug condition |
| Low power, rough running | Air/fuel or compression | Check air filter, fuel quality, tune-up items |
| Oil leak | Gaskets/seals | Clean area, locate leak source, replace seal/gasket |
Why it matters
Knowing which parts belong to the engine (and which are deck or chassis parts) helps you troubleshoot faster, buy the right Craftsman replacement parts, and avoid damage from issues like low oil or stale fuel during storage.
Last updated: February 2026
What brand engine does Craftsman use?
For the Craftsman lawn tractor model 917276630, Craftsman commonly uses engines supplied by major small-engine manufacturers; the exact engine brand varies by tractor model and production run. Your 917276630 is a 20.0 HP front-engine lawn tractor, and the most reliable way to confirm the engine maker is to match the engine ID label to the specifications in the 917276630 owner's manual.
How to identify the engine brand on your tractor
We recommend checking the engine identification label on the engine itself (not the tractor frame). On most riding mowers, it is on the blower housing, valve cover area, or near the starter.
- Locate the engine ID tag (model, type, and code numbers)
- Write down the full engine model and spec numbers
- Compare those numbers to the engine section in the 917276630 owner's manual
- If the label is dirty, wipe it gently so the numbers are readable
- Use the engine model number when ordering tune-up parts (spark plug, air filter, oil filter)
What you will typically see on Craftsman riding mowers
Craftsman has historically sourced riding mower engines from several well-known brands. The most common suppliers you will run into include Briggs & Stratton, Kohler, and Kawasaki (availability depends on the specific tractor model).
| What you have | What it tells you | What to do next |
|---|---|---|
| Engine ID label shows a brand name | Confirms the engine manufacturer | Use that engine model for maintenance parts |
| Label shows only numbers/codes | Brand may be implied by the format | Match the code format in the manual |
| Missing/unreadable label | Harder to confirm by sight | Use manual specs and engine features to narrow it down |
Why it matters
The engine brand and engine model number determine the correct maintenance items and settings (oil type, spark plug, air filter style, and tune-up intervals). Using the right engine identification also helps when diagnosing starting problems or poor performance.
Last updated: February 2026
What kind of engine does a Craftsman riding lawn mower have?
For Craftsman lawn tractor model 917276630, the operator’s manual identifies it as a 20.0 HP riding lawn tractor with a low-emission gasoline engine and electric start. For the exact engine make and model (such as Briggs & Stratton or Kohler), we use the engine ID label on the engine and the 917276630 owner's manual.
How to identify the exact engine on model 917276630
Use these quick checks to confirm the engine type and order the right tune-up parts:
- Look for the engine model/type/code sticker on the blower housing or valve cover
- Record the full string (letters and numbers) exactly as shown
- Match that ID when buying a spark plug, air filter, fuel filter, or starter parts
- If the label is missing, use the tractor’s specs section and engine illustrations in the manual
- Confirm your tractor model number is 917276630 (not a close variant)
What we can confirm from the manual (and what it means)
The manual for Craftsman 917276630 calls out these key engine-related features:
| Item | What you can expect | Why it matters |
|---|---|---|
| Horsepower rating | 20.0 HP | Helps match the correct engine family and service parts |
| Starting system | Electric start | Points to battery, wiring, and solenoid as common no-start checks |
| Emissions design | Low-emission engine | Some starting and choke behavior differs from older engines |
Common engine-related parts customers replace
If you are troubleshooting starting or blade engagement issues, these model-matched parts are often involved:
- Starter solenoid 582042802 (no-crank or click-no-start symptoms)
- Battery cables and connections (corrosion causes voltage drop)
- Drive and deck belts (slipping, squealing, or blades not turning)
- Blades and mandrel components (vibration, poor cut, or uneven discharge)
Why it matters
Craftsman tractors can use different engine manufacturers across similar-looking models. Using the engine ID label (plus the 917276630 model number) prevents wrong-part returns and speeds up repairs.
Last updated: February 2026
What model number is a Craftsman 6.75 lawn mower?
A “Craftsman 6.75” label by itself is not a single model number; Craftsman used 6.75 HP on multiple walk-behind mowers. The model number is found on the mower’s model tag (often under the rear flap, on the deck near the engine, or on the rear frame); use that exact number to match parts and the correct manual.
Where to find the model number on the mower
Look for a sticker or metal tag that lists MODEL (and often PRODUCT or SERIAL). Common locations include:
- On top of the mower deck near the rear wheels
- Under the bagger door or rear discharge flap
- On the rear frame crossmember behind the engine
- On the side of the deck near the height adjuster
- Near the handle mount brackets
What the model number usually looks like
Most Craftsman walk-behind mower model numbers are 9 digits and often start with 917 (example format: 917.XXXXXX). Write it down exactly as shown.
| What you see | What it means | What to do next |
|---|---|---|
| “6.75” or “6.75 HP” | Engine power rating, not a model | Find the model tag and record the full model number |
| “917.XXXXXX” | Craftsman mower model number | Use it to look up parts and diagrams |
| Serial number | Production identifier | Keep it for reference, but parts lookup uses the model number |
Why it matters
Parts like blades, belts, wheels, and engine tune-up items vary by deck size and configuration. Using only “6.75” can lead to the wrong blade length or mounting pattern, which affects cut quality and safety.
If you are trying to match a specific known model
If your mower is actually Craftsman model 917377911 (a 21-inch 6.75 HP rotary mower), use that full model number for parts lookup and documentation. For our Craftsman riding tractor model 917276630, use the 917276630 owner's manual for tractor-specific specs and maintenance.
Last updated: February 2026
What year is a Craftsman 917276630 riding mower?
The Craftsman riding mower model 917276630 is identified in the documentation as a Craftsman lawn tractor 20.0 HP with a 42-inch mower deck and electric start; the operator’s manual does not list a single “model year.” For the exact year, we use the tractor’s product identification label information as shown in the 917276630 owner's manual.
How to find the exact year for model 917276630
We match the tractor’s build information from the ID label to the correct production timeframe.
- Look under the seat and around the rear fender pan area for the product identification label
- Write down the model number (917276630) and any serial number/date code shown
- If the label is dirty, wipe it gently so every digit is readable
- Keep the numbers with your maintenance records for future parts lookups
Why the “year” can be hard to pin down
Craftsman model numbers identify a configuration (engine, deck size, transmission type), but the same configuration can be sold across multiple seasons. The most reliable way to determine the exact year is the ID label data referenced in the manual.
Quick model identification checklist (from the manual)
Based on the operator’s manual cover, this model is described as:
| Item | What the manual shows |
|---|---|
| Brand | Craftsman |
| Model number | 917276630 |
| Engine output | 20.0 HP |
| Mower deck size | 42 in |
| Starting system | Electric start |
| Drive type | 6 speed transaxle |
Why it matters
Knowing the correct production year helps us match the right parts and service procedures for your tractor, especially for wear items like blades, belts, and deck hardware.
Last updated: February 2026





