Craftsman 917378501 gas walk-behind lawn mower Parts

For the Craftsman gas walk-behind mower model 917378501, use 87-octane (regular) unleaded gasoline for normal operation. Higher octane (like 91) does not add power in small mower engines; it is mainly for engines designed for it. Follow the fuel guidance in your 917378501 owner's manual.

• Use: Fresh 87-octane unleaded gasoline.
• Avoid: Old gas (more than about 30 days without stabilizer).
• Avoid: Gas contaminated with water or dirt (causes hard starting and surging).
• Avoid: Overfilling the tank; leave room for expansion.
• Do first: Confirm the exact fuel notes and safety rules in the 917378501 owner's manual.

Using the right fuel helps your mower start easier, run smoother, and reduces carburetor and fuel-system problems. Most “won’t start” complaints trace back to stale fuel, dirty air flow, or neglected maintenance, not octane.

Try these checks (safe, high-impact steps):

• Drain old fuel and refill with fresh 87.
• Check the air filter for clogging.
• Inspect and replace the spark plug at the start of the season or every 100 hours (the manual lists the exact type and gap).
• Keep the mower housing and engine area clear of grass and debris (a clogged engine runs hotter and shortens engine life).
• If the self-propelled wheels bind, clean debris from the wheel and dust cover area; the manual outlines the cleaning steps.

If you are also servicing the cutting system, follow how to sharpen a lawn mower blade for safe blade handling and better cut quality.

Last updated: February 2026

The model number for this Craftsman gas walk-behind lawn mower is 917.378501 (often written without the dot as 917378501). You can confirm the exact formatting and where to find the ID label in the 917378501 owner's manual.

Most Craftsman walk-behind mowers list the model number on a product ID label. Check these common spots:

• Rear of the deck near the discharge chute area
• Top of the deck near the engine mounting area
• Near the rear door or bagger opening
• On the handle support bracket area
• In the manual’s identification section

Both formats refer to the same mower; the dot is a formatting style used in many manuals and parts diagrams.

Using the exact model number helps us match the correct blade, drive components, and hardware for your deck and drive system.

• Prevents ordering the wrong drive belt size
• Ensures the correct wheel and dust cover style
• Helps match the correct height adjuster parts
• Improves accuracy for handle and control cable parts

If you are replacing a common wear item, match by model first, then confirm by part ID. For example, the premium blade 532406706 is a model-matched blade option listed for Craftsman 917378501.

Last updated: February 2026

Craftsman model 917378501 is identified by its model number, not a built-in “year” code. For this mower, the most reliable way to confirm the manufacturing date is to use the product identification label details and the date guidance shown in the 917378501 owner's manual.

Look for the product ID label (typically on the rear of the deck, near the engine, or on the handle support). Then record the key details below.

• Model number: 917378501
• Serial number (write it exactly as shown)
• Engine model/type and code (often on the engine shroud)
• Any date or “code” printed on the label

Different Craftsman walk-behind mowers and engines use different date formats. Use this quick guide to narrow it down.

Knowing the correct production date helps us match the right parts and diagrams for your exact build, especially for wear items like the blade, drive system, and hardware.

If you are ordering parts for 917378501, confirm fit by model and diagram before buying:

• Premium blade 532406706 (blade length and deck style must match)
• Lawn mower ground drive belt, 3/8 x 33-9/16-in 532169778 (drive systems can differ)
• Cable.mzr.60 532183567 (control cable length and end fittings matter)

Last updated: February 2026