Craftsman 917379203 lawn mower Parts

For Craftsman model 917379203, the serial number tells you the unit’s production identity, but the most reliable way to confirm how old it is is to match the serial number on the mower’s rear-housing decal with your recorded purchase date and any registration or receipt details in the 917379203 owner's manual.

Where to find the serial number on model 917379203

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

• Tip the mower only as directed in the manual (fuel and oil can spill)
• Wipe the rear housing clean so the decal is readable
• Record both the model number and serial number exactly as shown
• Also record the date of purchase if you still have it

How to use the serial number to estimate age

Once you have the serial number, use it alongside your purchase information to narrow down the mower’s age.

• Check your receipt, invoice, or email order history for the purchase date
• Compare the serial number format to any Craftsman registration paperwork you may have
• If the mower was a hand-me-down, ask the prior owner for the approximate purchase year
• Use maintenance history as a clue (first spark plug change, first drive belt replacement, etc.)

Quick reference: what each identifier is used for

Identifier	Where you find it	What it’s best for
Model number (917379203)	Rear housing decal	Getting the correct parts diagrams and parts
Serial number	Rear housing decal	Identifying the specific production unit
Date of purchase	Your records (and manual notes)	Confirming the mower’s age

Why it matters

Knowing the mower’s age helps us match the right Craftsman walk-behind mower parts and plan maintenance. For example, drive system wear items (like the belt and control cables) and cutting components (like the blade and blade adapter) are often replaced based on years of use.

Last updated: January 2026

For a Craftsman walk-behind mower like model 917379203, the model number is typically printed on a sticker on the back of the mower deck, usually between the lower handle mounts. Use that exact number when ordering parts or checking the 917379203 owner's manual.

Where to look on the mower

Check these common label locations first (clean the area if it is dirty):

• Back of the deck, between the lower handle mounts (most common)
• Rear deck panel near the discharge area
• Top of the deck near the engine mounting area
• Under the rear flap or near the height adjuster area
• On the handle support bracket area

What the label usually shows

Most Craftsman mower ID stickers include more than one identifier. Use the model number for parts lookup.

Label item	What it’s used for	Example format
Model number	Parts diagrams, part compatibility	917.379203 or 917379203
Serial number	Manufacturing run identification	Letters and numbers
Engine model/type/code	Engine parts and tune-up items	Varies by engine brand

Tips if the sticker is hard to read

If the sticker is faded or covered, these steps usually help:

• Wipe with a damp rag and mild soap; dry completely
• Use a flashlight at an angle to make faint printing easier to see
• Take a close-up photo and zoom in
• Copy the number exactly, including dots or dashes if shown

Why it matters

Craftsman walk-behind mowers often share similar decks and controls, but parts like the drive system, cables, and blade hardware can vary by model. Using the correct model number helps ensure you get the right items the first time.

Last updated: January 2026

For the Craftsman 917379203 gas walk-behind mower, we recommend using regular 87-octane unleaded gasoline; higher octane (like 91) does not add power or protection in a small mower engine when the correct fuel is already being used. Use fresh fuel and follow the fuel and storage guidance in the 917379203 owner's manual.

Best fuel choice for this mower

• Use 87 octane unleaded gasoline for normal mowing.
• Choose fresh fuel; stale fuel is a common no-start cause.
• Avoid storing gasoline from one season to the next.
• Keep the gas can clean and rust-free to prevent dirt and rust from entering the fuel system.
• Let the engine cool before storing the mower, especially if fuel is still in the tank.

87 vs 91: what changes (and what does not)

Fuel	When it helps	What you should expect
87 octane (regular)	Everyday mowing	Normal starting, normal power
91 octane (premium)	Only if an engine specifically requires it	Typically no performance gain in a mower

If your mower is hard to start after fueling

Stale or contaminated fuel can mimic ignition or carburetor problems. Check these quick items first:

• Confirm you have fuel in the tank and it smells fresh (not sour or varnish-like).
• Check the air filter; a dirty filter can prevent starting.
• Make sure the spark plug wire is firmly connected.
• If the mower ran fine last season, drain old fuel and refill with fresh 87.

Why it matters

Using the right fuel (fresh 87 octane) helps prevent starting issues tied to stale fuel and water in fuel, which are common causes of a mower that will not start. Good fuel habits also reduce downtime and help protect the fuel system during storage.

Last updated: January 2026