Owner’s manual
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What engine does Craftsman riding mower use?
The Craftsman riding mower model 917273637 uses a mowemission engine (an emissions-compliant design that can run differently than older engines). For the exact engine identification (model, type, and code), we match the numbers stamped on the engine to the listings in the 917273637 owner's manual.
How to identify the exact engine on your 917273637
Use the engine ID tag or stamping on the engine itself; that is the most accurate way to confirm what you have.
- Park on a level surface, set the parking brake, and remove the key
- Let the engine cool before reaching near the muffler or cylinder fins
- Look for an engine label or stamped numbers on the blower housing, valve cover, or near the starter
- Write down the model, type, and code (or similar ID fields)
- Use those numbers when ordering tune-up parts (air filter, spark plug, fuel filter)
What we can confirm from the manual
The manual for this model describes the tractor as an 18.5 HP, 42-inch mower with electric start and a 6-speed transaxle. That tells you the power class and configuration, but the engine maker and exact engine family are confirmed by the engine ID tag.
| Item | What you can use it for |
|---|---|
| Horsepower rating (18.5 HP class) | Choosing correct maintenance schedule and performance expectations |
| 42-inch deck | Selecting compatible blades and deck parts |
| Electric start | Battery and starting-system troubleshooting |
| 6-speed transaxle | Proper shifting habits and drive troubleshooting |
Why it matters
Engine families can use different air filters, spark plugs, fuel filters, and carburetor settings even when the tractor model number is the same. Matching the engine ID prevents wrong-part returns and helps the mower start, run, and cut correctly.
Related parts you might replace while servicing the mower deck
If you are also servicing the 42-inch deck, these model-matched parts are commonly replaced during blade and spindle work:
- Lawn tractor 42-in deck high-lift blade 532138971 for bagging and strong lift
- Husqvarna lawn tractor mulching blade, 21-in 532134149 when mulching (use the blade style specified for your deck setup)
- Craftsman lawn tractor blade drive belt, 5/8 x 97-2/5-in 532174883 if blades slip or squeal
Last updated: February 2026
Where is Craftsman's model number?
On the Craftsman riding lawn tractor model 917273637, the model number is typically shown on the product identification label on the tractor frame (often under the seat area or near the rear fender). Your model number also appears on the cover page of the 917273637 owner's manual.
Where to look on the tractor
Check these common label locations first (clean the area if it is dusty or oily):
- Under the seat on the seat pan or frame rail
- On the rear fender area near the seat
- On the frame near the engine compartment
- Near the footrest area on the frame
- On a decal plate close to the transaxle area
Quick ID tips (so you do not mix up numbers)
Riding mowers often have multiple numbers on decals. Use this to match the right one:
| What you see | What it means | Use it for |
|---|---|---|
| Model number (example: 917.273637) | Identifies the tractor version | Parts lookup and manuals |
| Engine model/type code | Identifies the engine only | Engine parts and tune-up specs |
| Deck size (example: 42") | Cutting width | Blade and deck parts |
Why it matters
The model number is the fastest way to get the correct Craftsman parts (belts, blades, PTO switch, mandrel parts) because small design changes can affect fit, even on tractors with the same 42-inch deck.
Last updated: February 2026
How much does it cost to replace a riding lawn mower engine?
For a Craftsman riding tractor like model 917273637, a complete engine replacement (engine plus labor) typically costs about $600 to $2,500. The biggest price drivers are the engine brand/horsepower, whether the replacement is a direct bolt-on, and the shop labor time.
Typical cost breakdown
These ranges reflect what we see for riding mower and lawn tractor engine swaps.
- Engine (new): $400 to $1,800
- Labor: $200 to $700
- Common add-ons: $25 to $200 (oil, filter, fuel filter, spark plug, belts, hardware)
- Pickup/delivery (if used): $50 to $200
| Item | Budget range | Higher-end range |
|---|---|---|
| Engine | $400 to $900 | $900 to $1,800 |
| Labor | $200 to $400 | $400 to $700 |
| Fluids and tune-up parts | $25 to $75 | $75 to $200 |
| Estimated total | $625 to $1,375 | $1,375 to $2,700 |
What changes the price the most
- Direct replacement vs. custom fit: Throttle/choke linkages, wiring, and exhaust alignment can add time.
- Crankshaft and PTO setup: Matching crank diameter/length and pulley alignment prevents belt and deck issues.
- Condition of drive and deck components: Worn belts or idlers can make a “new engine” feel weak.
- Shop rate and turnaround: Local labor rates and seasonal demand can shift totals quickly.
Before you replace the engine (quick checks)
Many “bad engine” symptoms are caused by fuel, ignition, or safety interlocks.
- Confirm the PTO is disengaged and the clutch/brake pedal is fully depressed (interlock requirement).
- Check for fresh fuel and replace the fuel filter if flow is restricted.
- Inspect the spark plug and wire connection.
- Clean the air filter and engine cooling fins/screen.
- Verify the operator presence system works as intended (engine should shut off if you leave the seat in certain conditions).
For model-specific operating and maintenance guidance, use the 917273637 owner's manual.
Why it matters
A properly matched engine and correct PTO/belt alignment protect expensive deck parts (like mandrels and blades) and help the tractor cut evenly and run cooler. If you are also servicing the deck, a fresh set of blades such as the lawn tractor 42-in deck high-lift blade 532138971 can improve cut quality after the repair.
Last updated: February 2026
Where can I find the Craftsman product date code?
On the Craftsman riding lawn tractor model 917273637, the most reliable place to confirm product identification details is the ID and reference information shown in the 917273637 owner's manual. For add-on items like a battery or charger, the date code is typically stamped or printed directly on the item itself, not on the tractor frame.
Where to look (most common locations)
Check these spots in order:
- Battery case: look on the top or side of the plastic housing for a stamped, engraved, or printed code
- Battery label: some batteries place the code near the warning label or rating label
- Charger housing (if you use an external charger): check the bottom of the unit for a printed code
- Tractor ID label: look under the seat, on the frame rail, or near the engine area for the tractor’s model and serial information
- Engine label: many engines have a separate model/type/code tag on the blower housing or valve cover area
What the date code usually looks like
Most date codes are short and numeric (often 6 digits) and may be formatted as a date or as a manufacturer code that includes a date.
| Item | Typical code style | Where it’s printed |
|---|---|---|
| Battery | 6-digit numeric or date-like code | On the plastic case or label |
| Charger | Printed date code | Bottom label |
| Tractor | Model/serial (not always a date code) | Frame ID label |
Why it matters
The date code helps match the correct replacement battery, charger, or electrical parts and can also help you confirm whether a no-start issue is likely battery age-related before replacing components.
If you are troubleshooting starting problems, a quick first step is to verify the key and electrical controls are working; the molded ignition key 532140403 is the correct key style listed for this model.
Last updated: February 2026
What model number is the Craftsman 42 riding mower?
For the Craftsman 42-inch riding mower shown in the documentation for this model page, the model number is 917.273637 (often written without the dot as 917273637). You can confirm it on the cover and model identification information in the 917273637 owner's manual.
Where to find the model number on the tractor
On Craftsman riding mowers, the model number is typically printed on a product identification label. Check these common spots:
- Under the seat on the frame or fender pan
- On the rear fender area near the seat base
- On the left or right side of the frame rail
- Near the engine compartment on the chassis
- In the manual and parts diagrams for the mower deck and tractor
Why the “42” matters (and what it does not mean)
“42-inch” refers to the mower deck cutting width, not the model number. For model 917.273637, the manual and deck parts list show 42-inch deck blade options such as a mulching blade and a high-lift blade.
Common 42-inch deck blade types for this model
| Blade type | Best for | Example part for model 917273637 |
|---|---|---|
| Mulching blade | Returning clippings to the lawn | Husqvarna lawn tractor mulching blade, 21-in 532134149 |
| High-lift blade | Bagging or side discharge | Lawn tractor 42-in deck high-lift blade 532138971 |
Why it matters
Using the correct model number (917273637) helps us match the right Craftsman parts, diagrams, and specs for your exact tractor, especially for deck components, belts, mandrel parts, and steering or chassis hardware.
Last updated: February 2026
What year is a Craftsman 917273637 riding mower?
Craftsman riding mower model 917273637 is identified by its model and serial information, not by a single “model year” printed on the tractor. To get the exact build year, use the product identification label on the tractor and cross-reference it using the 917273637 owner's manual.
Where to find the date information
On Craftsman tractors like 917273637, the product identification label is typically located in one of these spots:
- Under the seat pan
- On the rear fender or fender pan area
- Near the frame behind the engine
- On the left or right side of the chassis rail
Write down everything on the label, especially:
- Model number: 917273637
- Serial number
- Product number (if shown)
- Engine model and engine code/date code
What the manual confirms about model 917273637
The owner’s manual for Craftsman 917273637 identifies the tractor configuration used for parts matching and service procedures.
| Manual item | What you can use it for |
|---|---|
| Model number 917.273637 | Confirms you have the correct manual and parts diagrams |
| 42-inch mower deck | Helps you choose the correct blades, belt routing, and deck parts |
| Electric start | Points you to battery, starter, and safety interlock checks |
Deck parts that commonly relate to the 42-inch setup
If you are maintaining the mower deck while you are identifying the tractor, these parts are commonly associated with the 42-inch deck listed in the manual:
- Lawn tractor 42-in deck high-lift blade 532138971
- Husqvarna lawn tractor mulching blade, 21-in 532134149
Why it matters
Craftsman tractors can have multiple production runs under the same model family; the serial number and engine date code pinpoint the exact build period so you get the right belts, blades, mandrel parts, and decals.
Last updated: February 2026
