Craftsman 917370640 lawn mower Parts

Common problems on the Craftsman 917370640 walk-behind mower include starting issues (stale fuel, dirty air filter, bad spark plug), loss of power from grass and debris buildup under the deck, excessive vibration from a worn or loose blade, and self-propel drive problems when the drive wheels or drive system get clogged or worn. See the 917370640 owner's manual for the model’s troubleshooting chart and maintenance steps.

Most common symptoms and what usually causes them

• Won’t start: stale fuel, water in fuel, dirty air filter, disconnected plug wire, bad spark plug
• Loss of power: cutting too much grass, dirty air filter, grass and leaves packed under the deck, oil level too high
• Poor or uneven cut: blade worn or bent, wheel heights set uneven, deck packed with clippings
• Excessive vibration: loose blade bolt, damaged blade, bent crankshaft, broken blade adapter
• Hard to push or drive slows: grass too high, cutting height too low, drive wheels packed with debris, belt or cable wear

Quick checks we recommend (fast, high-impact)

1. Check fuel quality: drain old gas and refill with fresh gasoline if it has been sitting.
2. Inspect under the deck: remove packed grass and leaves (a common cause of power loss and poor cut).
3. Verify wheel height settings: set all wheels to the same cutting height.
4. Check the blade and hardware: tighten the blade bolt; replace a worn or bent blade.
5. Clean the drive wheel area (self-propel models): debris in the dust cover, pinion, or gear teeth can stop the wheels from turning freely.

Parts that commonly get replaced on this model

Symptom	Part to inspect	Example part for 917370640
Poor cut, vibration	Blade	Lawn mower 22-in deck 3-in-1 blade 532420463
Loss of drive or slow drive	Drive cable	Lawn mower drive control cable 588479201
Discharge issues or safety concerns	Deflector	Lawn mower clipping deflector 532426129

Why it matters

Catching these issues early prevents bigger failures. For example, running with a loose or damaged blade can create severe vibration, and letting grass pack under the deck can overload the engine and reduce cut quality.

Last updated: February 2026

The model number for this Craftsman walk-behind mower is 917.370640 (often written without the dot as 917370640). You’ll find it printed on the mower’s model tag and it’s also shown on the cover and parts diagrams in the 917370640 owner's manual.

Where to find the model number on the mower

Check these common locations on Craftsman walk-behind mowers like model 917370640:

• On the rear of the deck near the discharge opening or rear door
• On the top of the deck near the engine mounting area
• On the handle bracket area (near the lower handle mounts)
• On a sticker or metal plate that also lists engine details

What the model number looks like (and why it varies)

You may see the same model shown a few different ways; they all refer to the same mower.

How it may appear	What it means
917.370640	Standard Craftsman formatting with a dot
917370640	Same model number without punctuation
917,370640	Comma used in some diagram headings

Why it matters when ordering parts

Using the exact model number ensures you get parts that match your deck and drive system (22-inch multi-cut, power-propelled). For example, the correct blade and drive parts are model-specific, such as the lawn mower 22-in deck 3-in-1 blade 532420463 and the lawn mower drive control cable 588479201.

Quick tip before you buy parts

Match both of these before ordering:

• Mower model number: 917370640
• Part number or part ID from the diagram list in the manual

Last updated: February 2026

Craftsman model 917370640 is a walk-behind rotary lawn mower model number, not a date code; the model number itself does not tell the year. To find the year, we use the mower’s product ID/serial number label and confirm the format shown in the 917370640 owner's manual.

Where to find the year information

On Craftsman walk-behind mowers like 917370640, the build date is typically tied to the product identification label (often on the rear of the deck, near the wheels, or on the handle support), not the model number.

Check these common locations:

• Rear of the mower deck (behind the engine)
• Left or right side of the deck near a wheel
• Handle bracket area near the height adjuster
• Under the rear door area (bagging opening)

How to decode it (what usually causes confusion)

Many “month-day-year” decoding tips online refer to a separate date code found on a label, not the 917370640 model number.

Here is the key difference:

Item you’re reading	What it tells you	Example	What it is used for
Model number	Product family/configuration	917370640	Finding parts diagrams and correct replacement parts
Serial/product ID label	Manufacturing info (often includes date)	Varies by label	Determining year and production run

Why it matters

Getting the year right helps when you are matching engine tune-up parts, control cables, and deck hardware across production changes. It also prevents ordering a “close” part that looks right but mounts differently.

Parts that are commonly year-sensitive

If you are troubleshooting fitment or replacing wear items, these are often tied to the exact production run:

• Husqvarna lawn mower zone control cable 532420939
• Lawn mower drive control cable 588479201
• Lawn mower 22-in deck 3-in-1 blade 532420463

Last updated: February 2026