Craftsman 917377782 rotary lawn mower Parts

On Craftsman rotary lawn mower model 917377782, the serial number is primarily used to identify the exact production run for parts and service. We recommend recording the serial number from the decal on the rear of the mower housing and using it alongside the model number when ordering parts or checking specifications in the 917377782 owner's manual.

Where to find the serial number on model 917377782

The model and serial numbers are printed on a decal located on the rear of the lawn mower housing.

• Look at the back of the deck (rear housing area)
• Wipe off grass and dirt so the decal is readable
• Record both the model number and serial number exactly as shown
• Keep the numbers with your purchase date for future reference

How to interpret the serial number

Craftsman serial number formats vary by mower family and production era, so there is not one universal “MMDDYY” rule that applies to every Craftsman mower.

Use this quick guide to get the right result:

• Use the serial number for identification, not as a guaranteed date code
• Match the full serial number when looking up parts diagrams or service info
• If you see a date-style pattern, treat it as a clue, not a certainty
• When in doubt, rely on the manual and parts list for your exact model

Common serial number patterns (what they usually mean)

Pattern you see	What it typically indicates	Best way to use it
All numbers, long string	Production/sequence code	Use for parts lookup and service identification
Includes letters + numbers	Plant/line + sequence	Copy exactly; letters matter
Looks like MMDDYY	Possible build-date encoding	Confirm by cross-referencing model/engine info

Why it matters

Using the correct serial number helps prevent ordering the wrong blade, drive components, or hardware for your mower deck and self-propel system. It is especially helpful when multiple versions of a 21-inch Craftsman walk-behind mower share similar model families.

Last updated: January 2026

The model number is 917.377782 (commonly written without the dot as 917377782). On this Craftsman rotary lawn mower, you’ll find the model number on the mower’s identification decal, and it’s also shown on the cover of the 917377782 owner's manual.

Where to find the model number on the mower

We look for the ID decal on the rear of the lawn mower housing. Record both the model and serial number for parts lookup and service.

• Check the rear of the deck (housing) for the decal
• Write down the full model number: 917.377782
• Write down the serial number from the same decal
• Keep the purchase date with your records
• Use the model number when ordering parts like a blade, belt, or drive cable

Model number formats you may see

These are the same model number written in different common formats.

Format	Example	When you’ll see it
With dot	917.377782	Owner’s manual, decals, older paperwork
Without dot	917377782	Parts lookup, online search

Why it matters

Using the exact model number helps us match the correct Craftsman walk-behind mower parts and diagrams, especially for wear items like the blade and drive system.

Last updated: January 2026

On the Craftsman rotary lawn mower model 917377782, we typically find the model number on a decal on the rear of the lawn mower housing. That same decal usually also lists the serial number, which is helpful when ordering parts or checking the correct owner information in the 917377782 owner's manual.

Where to look on the mower

Check these common spots first (with the engine off and cool):

• Rear of the mower deck (housing), on a decal (most common for this model)
• Back edge of the deck near the discharge door area
• Near the handle mounting points on the deck
• Under grass buildup on the rear of the deck (wipe clean to read)
• On a worn decal that may be partially peeled or faded

Quick steps to find it fast

• Park on a flat surface and shut the engine off.
• Let the muffler and engine cool completely.
• Tip the mower only as directed in the 917377782 owner's manual so fuel does not spill.
• Wipe the rear housing with a damp rag to remove dirt and grass film.
• Write down both the model and serial numbers exactly as shown.

What the decal usually includes

Item on decal	What it’s used for
Model number	Matching the correct parts diagrams and parts list
Serial number	Identifying production run details for the same model
Date of purchase (sometimes recorded by owner)	Maintenance and warranty recordkeeping

Why it matters

Using the exact model number helps us match the right Craftsman walk-behind mower parts (like a blade, wheel, or drive cable) to your specific deck and drive system so you do not end up with a part that looks similar but does not fit.

Last updated: January 2026