Craftsman 917389021 lawn mower Parts

For Craftsman walk-behind mowers like model 917389021, we typically find the model number and serial number on the mower deck, not on the engine. On this mower, the ID label is usually on the back of the deck, near the lower handle mounting points; confirm the exact location in the 917389021 owner's manual.

Where to look on the mower

Check these common label locations first:

• Back of the deck (rear of the cutting housing), between the lower handle mounts
• Top of the deck near the rear discharge opening or grass bag area
• Side of the deck near a rear wheel height adjuster
• Under the rear skirt area (wipe off grass and dirt to see the sticker)

What number to use when ordering parts

For Sears PartsDirect parts lookup and ordering, use the mower model number (917389021). The engine also has its own model number, which is helpful for engine-specific parts.

What you’re looking at	Example for this mower	Use it for
Mower model number	917389021	Deck, handle, wheels, blade, bagging parts
Engine model number	122T02-1308-B1 (Briggs & Stratton)	Carburetor, ignition, engine gaskets

Tips to read the label correctly

• Clean the area with a damp rag; dried clippings can hide digits
• Write down the full model number and serial number exactly as shown
• If the sticker is damaged, check the parts diagram section in the 917389021 owner's manual to confirm the model format

Why it matters

The model number narrows parts to the exact Craftsman deck and handle configuration (21-inch Multi-Cut on this unit). That prevents ordering a blade, discharge guard, or height adjuster that looks similar but will not fit.

Last updated: January 2026

The Craftsman 917389021 walk-behind mower uses a Briggs & Stratton 4-cycle engine. Our 917389021 owner's manual identifies it as a 625 Series Briggs & Stratton engine and lists the engine model number as 122T02-1308-B1.

How to confirm the exact engine on your mower

We match the manual details to the engine’s ID label on the mower (typically on the blower housing, valve cover area, or near the muffler).

• Find the Briggs & Stratton engine label or stamped code
• Verify it is a 4-cycle engine (separate crankcase oil, no oil mixed in fuel)
• Match the engine model format (example: 122T02-1308-B1)
• Use the engine model to choose the correct spark plug, air filter, and carburetor parts
• Use the mower model (917389021) for chassis parts like wheels, handle hardware, and guards

Engine identifiers: what each one is used for

The series name helps narrow the engine family; the engine model number is the most precise identifier for engine maintenance parts.

Identifier	Example for this mower	Best used for
Mower model number	917389021	Deck, wheels, handle, discharge parts
Engine series	625 Series	General engine family grouping
Engine model number	122T02-1308-B1	Exact engine tune-up and internal engine parts

Why it matters

Correct engine identification prevents wrong-part returns and helps ensure reliable starting, smooth running, and proper blade control.

Last updated: January 2026

For your Craftsman walk-behind mower model 917389021, use fresh, clean regular unleaded gasoline; avoid old fuel, and plan to drain the tank if the mower will sit for 30 days or longer. This helps prevent fuel-system damage and hard-starting.

Recommended fuel and what to avoid

Most walk-behind mower engines run best on regular unleaded fuel. The key is freshness and proper storage.

• Use fresh regular unleaded gasoline from a clean container.
• Avoid stale fuel (a common cause of no-start conditions).
• Avoid fuel that has water contamination.
• Be cautious with alcohol-blended fuels (gasohol) because they can attract moisture during storage.
• Never pour engine or carburetor cleaner into the fuel tank.

For model-specific operating and storage guidance, follow the 917389021 owner's manual.

Storage rule (30 days or longer)

If you will not use the mower for 30+ days, we recommend emptying the fuel system before storage.

• Empty the gas tank.
• Start the engine and let it run until it stops (this helps clear the fuel lines and carburetor).
• Refill with fresh gasoline when you put the mower back in service.

Quick troubleshooting: fuel-related no-start symptoms

If the mower will not start, fuel quality is one of the first things we check.

Symptom	Likely fuel-related cause	What to do
Engine will not start after sitting	Stale fuel	Drain and refill with fresh gasoline
Starts then dies	Water in fuel	Replace fuel with fresh, clean gasoline
Runs rough after storage	Fuel separation from alcohol blend	Drain system; use fresh fuel

Why it matters

Fresh gasoline protects the carburetor and fuel lines, improves starting, and reduces storage-related problems like corrosion and deposits.

Last updated: January 2026