Craftsman 917273621 lawn tractor Parts

The model number for this Craftsman front-engine lawn tractor is 917.273621 (often written without the dot as 917273621). You can also confirm it in the tractor’s documentation, where it’s listed on the electrical and chassis diagrams in the 917273621 owner's manual.

Where to find the model number on the tractor

We recommend matching the number on the tractor’s ID label to the manual so you order the right parts (like a PTO switch, ignition key, or ground drive belt).

• Look under the seat area near the fender/footrest
• Check the frame rail near the engine compartment
• Look around the dash or steering pedestal area
• Match the full number, including any dots or spacing

Quick clarification (common mix-up)

Some Craftsman tractors have very similar model numbers, and a single digit change points to a different parts list.

What you see	What it means	Use for parts lookup
917.273621	This tractor’s model number	Correct for this page
917273621	Same model number without the dot	Also correct
917.273820	Different model	Not the same parts list

Why it matters

Using the exact model number ensures parts fit and function correctly, especially for electrical and drive components. For example, the manual lists a PTO switch as part number 174652, and our matching replacement is the switch.pto 582107601.

Last updated: February 2026

For a Craftsman lawn tractor model 917273621, a full engine replacement typically costs about $600 to $2,500 installed (engine plus labor). The biggest cost drivers are the engine type, whether the wiring and pulleys transfer over cleanly, and how much teardown is required.

What makes the price go up or down

• Engine cost: Most replacement riding mower engines land around $300 to $1,800 depending on brand, horsepower, and shaft specs.
• Labor time: A riding mower engine swap commonly runs 4 to 8 hours.
• Extra parts: Belts, pulleys, wiring repairs, and fuel system cleanup often add cost.
• Shop rates: Local labor rates vary widely.
• Condition of the tractor: Rusted fasteners, damaged harnesses, or worn mounts increase time.

Typical cost breakdown (installed)

Cost item	Typical range	Notes
Replacement engine	$300 to $1,800	Must match crankshaft diameter/length and mounting pattern
Labor	$300 to $900	Often 4 to 8 hours depending on access and corrosion
“While you’re in there” parts	$0 to $300	Belts, pulleys, battery cables, fuel line/filter
Estimated total	$600 to $2,500	Most jobs fall in the middle of the range

Before you replace the engine, confirm it is really the problem

Many “needs an engine” symptoms are caused by starting, safety, or fuel issues. Our 917273621 manual troubleshooting chart calls out checks like the brake pedal position, battery condition, fuse, wiring, ignition switch, and solenoid or starter. Use the 917273621 owner's manual to walk through those steps in order.

Quick checks that often save an engine swap

• Recharge or replace the battery, then clean battery terminals
• Check and replace the fuse if blown
• Inspect wiring connections for looseness or damage
• Test the ignition switch and starter solenoid
• Drain stale fuel and replace the fuel filter; check spark plug and plug wire

Why it matters

An engine replacement is one of the highest-cost repairs on a riding mower. Verifying the battery, wiring, ignition, and fuel system first prevents spending engine-level money on a problem that a switch, solenoid, or tune-up would fix.

Last updated: February 2026

On a Craftsman riding mower like model 917273621, we look up the model number by finding the model and serial tag on the tractor frame under the seat area (often on the frame rail) or on the underside of the seat, then matching that number when ordering parts or checking specifications in the 917273621 owner's manual.

Where to find the model and serial tag

Check these common locations first:

• On the frame under the seat (lift the seat and look down at the frame rails)
• On the underside of the seat pan
• Near the rear fender area close to the seat mounting points
• On a label plate that includes both model and serial information

How to use the model number once you find it

Use the model number exactly as shown on the tag (including all digits).

What you need	What it’s used for	Example for this tractor
Model number	Correct parts diagrams and part compatibility	917273621
Serial number	Production range details and some part variations	From your tag

Tips to avoid ordering the wrong part

These quick checks prevent most fit issues:

• Confirm the model number is complete (no missing digits)
• Compare the part description to your tractor’s component (deck, steering, drive)
• Use the manual parts lists and diagrams to verify placement and hardware
• If you are servicing the drive system, match belt size and routing before ordering (for example, the lawn tractor ground drive belt, 1/2 x 82-in 532140294)

Why it matters

Craftsman tractors can look similar across years, but parts like belts, pulleys, and steering components vary by model number. Using 917273621 ensures you get the correct Craftsman lawn tractor parts and specifications for your exact machine.

Last updated: February 2026

For Craftsman lawn tractor model 917273621, the owner’s manual identifies it as a 24.0 HP tractor with a low-emission engine. The manual focuses on operation and maintenance; for the exact engine manufacturer and model (such as Briggs & Stratton or Kohler), we use the engine ID label on your engine and the specs listed in the 917273621 owner’s manual.

How to identify the exact engine on your 917273621

Use these quick checks (no special tools needed):

• Look for the engine ID sticker/plate on the blower housing, valve cover, or near the starter
• Write down model, type, and code (common on Briggs & Stratton) or spec number (common on Kohler)
• Match the engine label info to the parts list and tune-up items you buy (spark plug, air filter, oil filter)
• If the label is dirty, wipe it gently; avoid spraying water directly into electrical connectors
• If the label is missing, use the tractor’s model number 917273621 plus the engine’s visible features (carb style, filter housing shape) to narrow it down

What we can confirm from the manual (and what it means)

The manual confirms the tractor is a 24.0 HP, 48-inch mower with electric start and automatic transmission.

Spec area	What the manual indicates	Why you care
Horsepower	24.0 HP	Helps match the correct belt routing, deck load, and tune-up parts class
Deck size	48-inch mower deck	Impacts blade set, mandrel components, and deck belt selection
Starting	Electric start	Points you toward battery, solenoid, key switch, and safety interlock checks

Why it matters

The engine brand and spec number determine the correct maintenance parts and settings (spark plug type/gap, air filter style, oil filter, and carburetor parts). Using the engine label prevents ordering the wrong tune-up parts even when the tractor model number is correct.

Related parts that affect “engine” symptoms

If the engine cranks or runs inconsistently, these tractor parts often get involved:

• Ignition key: molded ignition key 532140403
• Blade engagement circuit (can affect starting on some setups): switch.pto 582107601

Last updated: February 2026

Craftsman uses engines from multiple manufacturers across its riding mowers and lawn tractors. For Craftsman model 917273621, the correct way to confirm the engine brand is to read the engine’s ID label (model and spec/code) and cross-check it with the 917273621 owner's manual.

Common engine brands used on Craftsman lawn tractors

Depending on the year and configuration, Craftsman tractors commonly use engines from:

• Briggs & Stratton
• Kohler
• Kawasaki
• Other OEM suppliers used on certain production runs

How to identify the engine brand on your 917273621

Use the engine identification tag, not the tractor model tag. On most lawn tractor engines, you can find it on one of these areas:

• Top shroud or blower housing
• Valve cover area
• Engine block near the starter
• Side of the engine near the muffler

Write down the full set of numbers on the tag (typically engine model plus a spec/code). That information identifies the engine maker and the exact engine build.

Quick reference: tractor model vs. engine model

What you’re checking	Where to find it	What it’s used for
Tractor model number 917273621	Frame tag under the seat or on the chassis	Tractor-specific parts (belts, steering, deck, chassis)
Engine model and spec/code	Label or stamping on the engine	Engine brand and engine-specific parts (filters, plugs, carb parts)

Why it matters

The engine brand and spec/code determine the correct maintenance and repair parts. For example, a ground drive belt such as the lawn tractor ground drive belt, 1/2 x 82-in 532140294 fits the tractor, but spark plugs and air filters must match the engine’s exact model.

Last updated: February 2026

For your Craftsman lawn tractor model 917273621, the most reliable way to identify the build year is to read the product identification tag (model and serial) and decode the serial number date code printed on that tag. Use the 917273621 owner's manual to confirm the tag location and identification details.

Where to find the model and serial tag

On Craftsman riding lawn tractors, the product ID tag is typically in one of these places:

• Under the seat (seat pan area)
• On the rear fender near the seat
• On the frame rail near the engine
• Near the transmission area on the frame

How to decode the year from the serial number

Craftsman serial formats vary by production run, so start by checking for an obvious date code on the tag.

• Look for a line labeled MFG DATE, DATE, or similar
• If the serial begins with six digits, try reading them as a date code
• If the first six digits do not form a valid month and day, use the engine tag date (if present) as a secondary clue

Here is the most common date-code pattern you may see on riding equipment tags:

What you see on the tag	How to read it	What you get
First 6 digits look like MMDDYY	Month, day, year	Build date and year
A printed MFG DATE field	Already formatted	Build year is shown

Quick checks to avoid mix-ups

These steps prevent reading the wrong number:

• Confirm you are using the serial number, not the model number (917273621)
• Write the serial exactly as shown (include letters if present)
• Clean the tag gently so all digits are readable

Why it matters

The build year helps us match the correct parts diagrams and compatible components for your Craftsman tractor, especially for items that can change across production runs.

Last updated: February 2026