Craftsman 917274390 tractor Parts

A 547cc riding-mower engine typically rates about 17 to 20 HP at governed mowing speed (around 3,600 RPM). For Craftsman model 917274390, use the engine’s model/type code and the specifications in the owner's manual to identify the exact factory-rated horsepower for the engine installed on your tractor.

Typical horsepower range for a 547cc mower engine

Horsepower is not a direct cc conversion; it depends on RPM, tuning, and the rating standard used.

• Most 547cc V-twin mower engines land in the high-teens HP range
• Ratings vary by gross vs. net measurement
• The same displacement can rate differently at different governed RPM
• Engine condition (air filter, plugs, compression) affects real-world power

Engine size	Typical rated HP range	Common use
500 to 550cc	17 to 20 HP	42-inch decks, general mowing
600 to 700cc	20 to 24 HP	heavier cutting, hills, towing

How to get the correct HP for Craftsman 917274390

Because tractors can be built with different engine variants over time, the reliable way to confirm horsepower is to match the engine identification on your unit.

• Locate the engine label (usually on the blower housing or valve cover area)
• Write down the engine model and type code
• Cross-check those numbers against the spec section in the owner's manual
• If you are comparing engines, compare HP at the same RPM and the same rating method

Why it matters

HP helps with comparisons, but mowing performance often comes down to blade condition, deck airflow, and belt/mandrel health. A sharp, correct blade and a clean deck prevent bogging more than a small HP difference.

If you are troubleshooting weak cutting power

These checks improve cut quality on most Craftsman lawn tractors:

• Mow at full throttle to keep blade tip speed up
• Clean packed grass from the underside of the deck
• Replace worn or bent blades (example: lawn tractor 42-in deck high-lift blade 532138971)
• Inspect belt condition and idler tension
• Do a basic tune-up (fresh fuel, clean air filter, good spark)

You can order replacement parts for Craftsman 917274390 from the parts list for this model, or search by model number on Sears PartsDirect.

Last updated: February 2026

Craftsman lawn tractors can use engines from several manufacturers, but on model 917274390 the owner’s manual identifies it as an 18.0 HP low-emission engine (the manual does not call out a specific engine brand). For the exact engine make and model used on your tractor, match the engine ID label on the engine to the specifications section in the 917274390 owner's manual.

How to identify the engine brand on your 917274390

Use these quick checks on the tractor itself (they are the most reliable for engine identification):

• Look for an engine ID label on the blower housing, valve cover, or near the starter
• Record the model, type, and code/spec numbers from that label
• Check the hood decals and engine shroud for a manufacturer name (common examples are Briggs & Stratton, Kohler, or Kawasaki)
• Compare what you found to the product specifications section in the 917274390 owner's manual
• Use the engine label info when ordering tune-up and starting parts (spark plug, air filter, fuel filter)

Common engine brands used on Craftsman lawn tractors

Across Craftsman riding mowers and tractors, these engine brands are the most common:

Engine brand	Where you’ll usually see it	What it affects most
Briggs & Stratton	Many Craftsman lawn tractors	Tune-up parts, carburetion, ignition
Kohler	Some Craftsman lawn tractors	Charging system, fuel system, governor setup
Kawasaki	Less common on Craftsman tractors	Air filtration, carburetor, service intervals

Why it matters

The engine brand determines the correct maintenance parts and troubleshooting steps for issues like no-start, clicking/no-crank, or hard starting. Once you confirm the engine ID, you can choose the right electrical and starting components for the tractor, such as the ignition switch 532193350 or solenoid with brass plunger 532146154, when symptoms point to the key switch or starter circuit.

Ordering the right parts

We recommend ordering by model number 917274390 and then confirming fit by your engine label details. You can buy the parts listed for this tractor, or search by model number on Sears PartsDirect if you are expanding your parts list.

Last updated: February 2026

For Craftsman lawn tractors like model 917274390, the model number does not tell the year; the serial number (or product date code) on the tractor is what you use to identify the build date. Use the date-code format shown in your 917274390 owner's manual and the ID label on the frame to determine the year.

Where to find the serial number or date code

On most Craftsman riding mowers and lawn tractors, the ID label is on the tractor frame in an easy-to-see spot. Check these common locations:

• Under the seat pan or on the seat support
• On the rear frame near the hitch plate or drawbar area
• On the left or right frame rail under the hood
• Near the engine compartment on the chassis
• On the fender pan near the seat (varies by build)

How to decode the year from the serial number

Craftsman used more than one serial/date-code format over the years. The most common approach is:

• Look for a date code embedded in the serial number (often grouped digits)
• Interpret it as month, day, year when the code is clearly in that pattern
• Confirm by comparing the tractor features listed in the 917274390 owner's manual (18.0 HP, 42-inch deck, electric start, 6-speed transaxle)

Example date-code patterns you may see

What you see on the label	What it usually means	Example result
6 digits grouped like MMDDYY	Month, day, year	072811 = July 28, 2011
Longer serial with a 6-digit block inside	A date block is embedded	Find the MMDDYY block
Mixed letters and numbers	Factory/line info plus a date segment	Identify the date segment first

Quick checks to make sure you have the right label

Use these checks so you do not decode the wrong number:

• Model number should read 917274390 (sometimes printed as 917.274390)
• The label should also include a serial number (usually longer than the model)
• The tractor should match the manual basics: 42-inch mower deck and 6-speed transaxle

Why it matters

Knowing the correct year helps us match the right parts and diagrams for your exact build, especially for deck components and electrical items such as the lawn tractor ignition switch 532193350 or solenoid with brass plunger 532146154. You can order those parts from the list for this model, or search by model number on Sears PartsDirect.

Last updated: February 2026

You can buy replacement parts for your Craftsman lawn tractor model 917274390 directly from the parts list for this model, which helps ensure the part fits your tractor. For broader Craftsman parts searching by model number, we also recommend using Sears PartsDirect.

Best way to get the right part for model 917274390

Using the model-specific parts list is the fastest way to avoid ordering the wrong blade, ignition part, or deck hardware.

• Match the full model number 917274390 before ordering
• Use the exploded diagrams to confirm where the part installs
• Compare your old part to the listing (shape, mounting holes, connectors)
• Check the part description for deck size and application (for example, 42-in deck)
• Use the maintenance and repair sections in the owner's manual to confirm service procedures

Common replacement parts customers order for this tractor

These are examples of parts available for Craftsman 917274390 that customers often replace during routine maintenance or repairs:

• Mower blades (mulching or high-lift)
• Starter and ignition components
• Deck and mandrel components
• Nuts, caps, and small hardware

Examples from the parts list

What you are fixing	Example part on this model	What it does
Poor cut quality or damaged blade	Lawn tractor 42-in deck high-lift blade 532138971	Lifts grass for a cleaner discharge and more even cut
Engine will not crank with key	Lawn tractor ignition switch 532193350	Sends power to the starter circuit when you turn the key
Clicking or no-crank condition	Solenoid with brass plunger 532146154	Switches battery power to the starter when cranking

Why it matters

Riding mower parts are highly model-specific. Even within Craftsman tractors, deck size, mandrel style, and electrical connectors can vary; ordering by 917274390 reduces returns and gets your tractor back to mowing faster.

Last updated: February 2026