Craftsman 917378900 gas walk-behind lawn mower Parts

On a Craftsman gas walk-behind lawn mower like model 917378900, the model number is typically printed on a sticker or tag on the mower deck. On many Craftsman walk-behind mowers, it’s on the back of the deck, often between the lower handle mounts; confirm the exact location in the 917378900 owner's manual.

Where to look on the mower

Check these common spots on Craftsman walk-behind mower decks:

• Back of the deck, between the lower handle mounts (most common)
• Rear discharge area near the flap/deflector
• Side of the deck near a rear wheel height adjuster
• Top of the deck near the engine mounting area
• Under the rear bag door (if equipped)

What the label looks like

The identification label is usually a small sticker or metal tag. Use this quick guide:

What you see	What it means	What to write down
“Model” or “M/N”	Model number	Full model number (example: 917378900)
“Serial” or “S/N”	Serial number	Full serial number
“Product” or “Stock”	Product identifier	Optional, but helpful

Tips to read a worn or dirty tag

If the sticker is hard to read, these steps usually help:

• Brush off dry grass and dirt first
• Wipe gently with a damp rag and mild soap
• Use a flashlight at a low angle to make faded print stand out
• Take a close-up photo and zoom in
• Copy the number exactly, including any leading zeros

Why it matters

The correct model number ensures we match the right Craftsman parts diagrams and the correct replacement parts (for example, drive components, deck hardware, and controls) for your exact mower configuration.

Last updated: January 2026

The model number for this Craftsman gas walk-behind lawn mower is 917378900. You’ll find it on the mower’s model tag (often on the rear deck, near the height adjuster area, or on the handle support), and it’s the number we use to match the correct parts and diagrams.

Where to find the model number on the mower

• Check the model tag/label on the mower deck (rear or side)
• Look near the handle mounting brackets
• Inspect around the rear wheel height adjuster area
• Wipe off grass and oil residue; the tag is often hard to read when dirty

Why the model number matters for parts

Using the exact model number helps us match the right Craftsman parts for your mower’s build, including drive and cutting components.

Common part lookups tied to the model number include:

• Drive system parts (belt, pulleys, drive control)
• Cutting system parts (blade adapter, blade hardware)
• Wheel and axle hardware (washers, dust covers, E-rings)

Quick check: model number vs. other numbers

What you see	What it means	Use it for parts?
917378900	Sears/Craftsman model number	Yes
Engine model/type code	Engine identification	Sometimes (engine parts)
Part numbers on bags/boxes	Individual replacement part numbers	Yes (when ordering that part)

Helpful next step

For the exact label location and identification details specific to this mower, use the 917378900 owner’s manual.

Why it matters

A single digit off can route you to the wrong diagrams and parts; confirming 917378900 first prevents ordering the wrong blade adapter, drive belt, or wheel hardware.

Last updated: January 2026

Gas walk-behind mowers like the Craftsman 917378900 are not being phased out everywhere; rules vary by state and city, and most changes focus on limiting sales of new gasoline-powered outdoor power equipment rather than banning ownership or use. For model-specific operating and maintenance guidance, use the 917378900 owner's manual.

What’s changing (and what is not)

• Some areas are adopting restrictions on new gas-powered lawn equipment sales to reduce emissions and noise.
• Most policies do not require you to stop using a mower you already own.
• Many regions still allow gas mowers with no special requirements.
• Battery mowers are gaining market share, so gas models may have fewer new options over time.
• Parts support typically continues for years; routine wear items (blade adapter, belts, wheels, cables) remain serviceable.

How to plan if your area tightens rules

1. Keep your mower running efficiently (clean deck, sharp blade, fresh fuel, correct throttle setting).
2. Stock common wear parts you replace periodically.
3. If self-propel stops pulling, check the drive system first; the lawn mower wont move troubleshooting video motion drive failure is a good starting point.

Common service parts you may need

Mower symptom	Likely area to inspect	Example part for this model
Self-propel slips or won’t move	Ground drive belt, pulleys, drive control	Lawn mower ground drive belt, 3/8 x 32-1/2-in 532175436
Height adjustment won’t hold	Adjuster hardware/knob	Selector knob 532701037
Vibration or poor cut	Blade mounting, adapter wear	Lawn mower blade adapter 581547901

Why it matters

Knowing whether your local area is restricting sales versus use helps you decide whether to maintain your Craftsman mower, buy a backup gas mower, or plan a future switch to battery without rushing a replacement.

Last updated: January 2026

If your Craftsman gas walk-behind mower model 917378900 needs a repair that costs more than about half the price of a comparable new mower, replacing the mower is usually the cheaper long-term choice. Smaller fixes (belts, wheels, controls) are typically worth repairing.

A practical cost rule we use

• Repair it when the fix is routine maintenance or a single worn part.
• Replace it when the repair is a major drivetrain or engine-level expense.
• Replace it when multiple systems are failing at once (starting, drive, cutting).
• Repair it when the mower deck and engine are solid and you just need common wear parts.

For model-specific maintenance and adjustment guidance, use the 917378900 owner's manual.

Repairs that are usually worth it

These are common, contained repairs that often restore performance quickly:

• Replacing a worn self-propel belt such as the lawn mower ground drive belt, 3/8 x 32-1/2-in 532175436
• Replacing a damaged drive control such as the condrol.driv 583134601
• Replacing a worn drive wheel such as the husqvarna lawn mower drive wheel, 8 x 2-in 532180775
• Fixing cutting issues by replacing a worn blade adapter such as the lawn mower blade adapter 581547901

When replacement usually makes more sense

Major failures can approach the cost of a new mower, especially if labor is involved:

• Engine internal problems (low compression, heavy smoking, knocking)
• Repeated no-start issues after fuel-system and ignition basics are addressed
• Drive system damage that requires multiple major components at once

Quick decision table

Situation	Best value	Why
One worn part (belt, wheel, cable, control)	Repair	Low parts cost, fast turnaround
Repair estimate is over ~50% of new mower cost	Replace	Better value per dollar
Multiple big issues at once	Replace	Costs stack quickly
Deck and engine are in good shape	Repair	Extends mower life cheaply

Why it matters

A walk-behind mower’s value is tied to the engine, deck condition, and drive system. Spending heavily on major failures rarely pays back, but replacing common wear parts can keep your Craftsman mower cutting and driving reliably for seasons.

Last updated: January 2026