Owner’s manual
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What year is my Craftsman mower serial number lookup?
On Craftsman riding mowers like model 917273490, the serial number does not reliably encode the model year in a simple MM-DD-YY format. To identify the year, we match your serial number and product ID information to the correct production run using the identification label details shown in the 917273490 owner's manual.
Where to find the numbers you need
Look for the product identification label on the tractor (commonly under the seat, on the frame near the rear wheels, or under the hood area). Record these items:
- Model number: 917273490
- Serial number (full string, exactly as printed)
- Engine model/type and code (if listed)
- Any product number or manufacturing code on the label
How to use the serial number to narrow down the year
Because Craftsman serial formats vary by manufacturer and era, we use a practical lookup approach:
- Confirm the model number first (917273490 is a 16.5 HP, 42-inch deck tractor per the manual)
- Use the serial number to distinguish between production revisions
- Cross-check the deck and chassis parts used on your tractor (these often change by year)
Quick parts cross-check (helps confirm the production version)
If your tractor uses these common 42-inch deck parts, it supports that you are working within the correct model family:
| Component | What to compare on your tractor | Example part on this model |
|---|---|---|
| Blade type | Mulching vs high-lift | Husqvarna lawn tractor mulching blade, 21-in 532134149 or lawn tractor 42-in deck high-lift blade 532138971 |
| Deck shell | 42-inch deck assembly style | Deck weldment listings for this model |
| Front wheel hardware | Caps, bearings, rims | Axle cap and flange bearing listings |
Why it matters
Getting the correct year or production version prevents ordering the wrong blade, mandrel, deck hardware, or steering parts. Small design changes can affect belt routing, spindle (mandrel) fit, and deck leveling adjustments.
Last updated: February 2026
What model number is the Craftsman 917273490 riding mower?
The model number for this Craftsman riding mower is 917.273490 (often written without the dot as 917273490). You’ll see it on the identification label and on the cover page of the owner's manual, which lists it as “Model No. 917.273490.”
Where to confirm the model number on the tractor
Check these common locations on Craftsman front-engine lawn tractors:
- Under the seat on the frame or fender pan area
- On the rear fender near the seat
- On the frame rail near the engine compartment
- Near the footrest area on the chassis
Model number formats you may see
Both formats refer to the same tractor; the dot is just a formatting style.
| How it may appear | What it means |
|---|---|
| 917.273490 | Standard manual and label format |
| 917273490 | Same model number without punctuation (common online) |
Why it matters
Using the exact model number 917273490 ensures you get the correct Craftsman parts diagrams and the right replacement parts for your 42-inch mower deck, transaxle, and lift assembly. It also helps match items like blades, mandrel parts, and deck hardware to your specific build.
Quick parts examples tied to this model
If you are shopping by model, these are examples of parts listed for Craftsman 917273490:
- Lawn tractor 42-in deck high-lift blade 532138971 (for bagging or side discharge)
- Husqvarna lawn tractor mulching blade, 21-in 532134149 (mulching blade option listed for the 42-inch deck)
- Vented mandrel shaft assembly 532137646 (deck spindle shaft component)
Last updated: February 2026
Is it worth replacing a lawn mower engine?
Yes, replacing the engine on your Craftsman 917273490 lawn tractor is worth it when the deck, steering, and drive system are still solid and the total engine-swap cost stays well below the cost of a comparable replacement tractor. If the deck is rusted through or the transaxle is failing, put that money toward a different machine.
Quick decision checklist
- The mower deck is structurally sound (no cracks, no rust-through) and cuts evenly after basic maintenance.
- The transaxle drives smoothly (no slipping, no loud grinding, no loss of power on hills).
- The chassis and steering are tight (no excessive play in tie rods, spindles, or axle).
- You can still get common wear parts (blades, mandrel parts, belts, tires) for this model.
- The engine failure is major (thrown rod, no compression, severe smoking) rather than a tune-up issue.
Cost and effort: what to compare
Use this simple comparison to decide quickly:
| Item to compare | Replace engine makes sense when | Replace tractor makes sense when |
|---|---|---|
| Total repair cost | Clearly under about half the cost of a similar used or new tractor | Near half (or more) of replacement cost |
| Deck condition | Solid deck shell; spindles/mandrels serviceable | Deck shell is thin, cracked, or badly rusted |
| Drive system | Transaxle is strong and consistent | Transaxle is weak, noisy, or slipping |
| Your time/tools | You can DIY safely or have help | You would pay full labor for everything |
Before you commit: rule out “not an engine” problems
A lot of “dead engine” complaints are actually starting or safety-interlock issues. Your manual emphasizes proper interlock operation and safe service practices (for example, not making adjustments with the engine running). Use the owner's manual to confirm the correct start conditions and safety switch behavior.
Also check these common causes first:
- Weak battery or corroded cables
- Starter solenoid or starter motor issues
- Safety interlock switch problems (seat switch, brake/clutch switch, PTO switch)
- Fuel delivery problems (stale fuel, clogged fuel filter)
Why it matters
An engine swap can extend the life of a good tractor for years, but it only pays off if the cutting deck and drivetrain are dependable. If those core systems are worn out, a new engine will not fix poor cut quality, slipping drive, or unsafe operation.
Last updated: February 2026
What engine does Craftsman riding mower use?
Craftsman riding lawn tractor model 917273490 is a 16.5 HP tractor with an electric-start, low-emission gasoline engine; the exact engine make and model is identified on the engine’s model-type-code label and in the engine identification section of the 917273490 owner's manual.
How to identify the exact engine on model 917273490
Use the engine ID label to get the correct tune-up and repair parts:
- Find the engine model/type/code label (commonly on the blower housing, valve cover, or near the starter)
- Write the numbers exactly as shown; take a photo for reference
- Use those numbers to match the correct air filter, spark plug, fuel filter, and carburetor parts
- If the label is dirty, wipe it gently; avoid scraping off printed characters
- If the label is missing, use the tractor model 917273490 plus engine features (air cleaner style, muffler layout) to narrow the match
What the owner’s manual confirms for 917273490
The manual documents these model-specific basics:
| Item | Specification |
|---|---|
| Tractor rating | 16.5 HP, 42-inch mower |
| Starting system | Electric start |
| Transmission | 6-speed transaxle |
| Engine note | Low-emission design (operates differently than older engines) |
Why it matters
Engine make and model control the maintenance schedule and the exact parts that fit. Using the engine model/type/code prevents ordering the wrong service parts even when the tractor model number is correct.
Last updated: February 2026
Do Craftsman mowers use Briggs and Stratton engines?
Yes; Craftsman mowers and lawn tractors commonly use Briggs and Stratton engines, but Craftsman also used other engine makers depending on the model and year. For Craftsman lawn tractor model 917273490, confirm the engine maker by checking the engine ID label and the engine section of the owner's manual.
What applies to model 917273490
This Craftsman tractor is a 16.5 HP model with a 42-inch mower deck (as shown on the manual cover). The exact engine manufacturer is identified on the engine itself (model/type code tag) and is the best match point for engine tune-up parts.
- Read the engine brand and model/type numbers on the engine shroud or valve cover area
- Match those numbers to the engine parts listing and service info in the manual
- Use the tractor model number 917273490 to match deck, chassis, steering, and drive parts
- For deck service, use the correct blade style for your cutting setup (mulching vs high-lift)
- Replace worn deck hardware with the correct OEM-style fasteners to prevent loosening
Quick ways to identify the engine brand
| Where to look | What you will see | Why it helps |
|---|---|---|
| Engine shroud/blower housing | Brand badge (Briggs and Stratton, Kohler, Honda, etc.) | Fast visual confirmation |
| Engine ID label or stamped code | Model and type numbers | Required for correct filters, plugs, carb parts |
| Manual engine section | Engine maintenance specs and procedures | Confirms service intervals and settings |
Parts that are matched by tractor model (not engine)
Deck and chassis parts are selected by 917273490. Examples include mower deck components like the lawn tractor 42-in deck high-lift blade 532138971 or the husqvarna lawn tractor mulching blade, 21-in 532134149 when the application matches your deck setup.
Why it matters
Engine brand and engine model/type numbers control the correct tune-up parts and service steps. The tractor model number controls the correct deck, steering, and drivetrain parts; mixing the two is the most common reason for ordering the wrong maintenance parts.
Last updated: February 2026
