Craftsman 917371570 lawn mower Parts

The model number for this Craftsman gas walk-behind rotary lawn mower is 917.371570 (often written without the dot as 917371570). You’ll see it printed on the mower’s model label and on the cover page of the owner's manual.

Where to find the model number on the mower

Check these common locations on Craftsman walk-behind mowers:

• On the rear of the mower deck (housing) near the discharge area
• Near the height adjuster area on the deck
• On a label near the handle mounting points
• In the documentation that came with the mower (manual cover and parts list)

Why the dot matters (917.371570 vs 917371570)

Both formats refer to the same mower; the dot is just a formatting style used in manuals and labels.

Format you may see	What it means	Use it for
917.371570	Same model number with a dot	Reading the manual and model label
917371570	Same model number without a dot	Searching parts lists and ordering parts

Why it matters

Using the exact model number ensures you get the correct Craftsman walk-behind mower parts (like the blade, blade adapter, or control cable) and the right diagrams for maintenance and repairs.

Last updated: February 2026

For the Craftsman walk-behind mower model 917371570, use unleaded regular gasoline; the owner’s manual lists the fuel type as “Unleaded Regular” with a 1.6-quart tank capacity. For best small-engine performance, avoid high-ethanol fuels.

What to use (and what to avoid)

• Use fresh unleaded regular gasoline.
• Choose fuel with 10% ethanol or less (E10) when available.
• Avoid E15 (15% ethanol) and E85 (85% ethanol); these fuels are not suitable for most small engines.
• Do not use old gas that has been sitting for weeks or months.
• Keep the gas can clean and sealed to prevent water contamination.

Quick fuel guide

Fuel label at pump	Ethanol content	Use in model 917371570?
Unleaded regular (often E0 to E10)	0% to 10%	Yes
E15	15%	No
E85	Up to 85%	No

Why it matters

Using the right gasoline helps your mower start easier, run smoother, and reduces carburetor and fuel-system problems caused by stale fuel or excess ethanol.

Where to confirm specs

The fuel type and capacity are listed in the Product Specifications section of the owner's manual.

Last updated: February 2026

The Craftsman lawn mower model 917.371570 does not have a single built-in “model year.” We date it by the serial number stamped on the mower housing; the serial number includes a date code that identifies the manufacturing date. Use the steps in the owner's manual to find where the serial number is recorded.

How to find the year (and exact build date)

1. Locate the serial number label/stamp on the mower housing (deck area).
2. Write down the full serial number exactly as shown.
3. Decode the date portion of the serial number (many Craftsman walk-behind mowers use a MMDDYY style date code).

Quick decode example (common format)

If the serial number begins with 072811, that reads as:

Code	Meaning	Result
07	Month	July
28	Day	28
11	Year	2011

What to check if the code does not match MMDDYY

Some serial labels include extra characters or a different layout. These checks still get you to the correct year:

• Look for a 6-digit run that resembles a date (often near the start of the serial).
• Check for a separate “Date” field printed on the label.
• Compare the serial label to the “Record serial number and date of purchase” section in the owner's manual.
• If the mower has had major repairs, use the serial number on the deck, not a replacement engine tag.

Why it matters

Knowing the build date helps us match the correct Craftsman 917371570 parts and diagrams, especially for wear items like the lawn mower 21-in deck mulching blade 532406706 and blade adapter 532418373.

Last updated: February 2026

Common problems on the Craftsman 917371570 walk-behind mower include loss of power, poor or uneven cutting, excessive vibration, a starter rope that’s hard to pull, a grass catcher that won’t fill, and a mower that’s hard to push. Most issues trace back to cutting height, airflow, blade condition, or debris buildup; use the owner's manual troubleshooting chart to match symptoms to fixes.

Most common symptoms and what usually causes them

• Loss of power: cutting too low, dirty air filter, grass and debris packed under the deck, oil level too high, walking speed too fast
• Poor or uneven cut: worn or bent blade, loose blade hardware, uneven wheel height settings, deck buildup
• Excessive vibration: loose or damaged blade, damaged blade adapter, bent crankshaft (stop using the mower until inspected)
• Starter rope hard to pull: blade dragging in grass, brake engaged when control bar is released, damaged blade adapter
• Grass catcher not filling (if equipped): cutting too low, worn blade lift, catcher not venting
• Hard to push: grass too tall, cutting height too low, bag too full, handle height not comfortable

Quick checks we recommend first (fastest wins)

• Set the cutting height higher and slow your walking pace in heavy grass.
• Tip the mower safely and clean the underside of the deck (packed clippings cause power loss and poor cut).
• Inspect the blade for bends, heavy nicks, or rounded edges; replace if damaged.
• Check blade mounting parts for looseness or damage; a worn adapter can cause vibration.
• Verify the oil level is correct (overfilled oil can reduce power).

Parts that commonly solve cutting and vibration complaints

Symptom	Most likely wear item	Example part for this model
Poor cut, ragged grass	Blade	Lawn mower 21-in deck mulching blade 532406706
Vibration, blade won’t stay tight	Blade adapter	Blade adapter 532418373
Hard to push, uneven height	Height adjust hardware	Husqvarna lawn mower height adjuster knob 532701037

Why it matters

A dull or loose blade and a clogged deck make the engine work harder, reduce airflow for bagging and mulching, and can create unsafe vibration. Fixing the basics first prevents bigger repairs and improves cut quality immediately.

Last updated: February 2026