Craftsman 917379071 rotary lawn mower Parts

For the Craftsman 917379071 rotary lawn mower, use 87 octane gasoline; higher octane (like 91) does not add power or protection in a mower engine and usually just costs more. The bigger priority is using fresh, clean fuel and the correct oil level.

• Use 87 octane (regular unleaded) for normal mowing.
• Use fresh gas; old fuel is a top cause of hard starting and rough running.
• Avoid fuel that has been sitting in the can or tank for weeks; replace it with fresh fuel.
• If your area sells ethanol-blended fuel, keep it fresh and store it properly to reduce varnish and moisture issues.
• Do not “upgrade” octane to fix performance problems; address the real cause (fuel quality, air flow, spark, or carburetion).

• Drain and replace old fuel; refill with fresh 87.
• Inspect the blade for damage or heavy buildup; a bent or dull blade can load the engine (see lawn mower blade 532406713).
• Check the drive system if the mower feels sluggish or will not self-propel; a worn belt can slip (see belt 532157769).
• Verify the throttle control moves freely and returns properly (see lawn mower throttle cable 532168552).
• Follow the fuel and maintenance guidance in the 917379071 owner's manual.

Using the right fuel keeps starting easy, reduces carburetor deposits, and helps your Craftsman mower maintain steady RPM under load. Octane is not a “cleaner” or “stronger” fuel by itself; freshness and proper storage matter more.

Last updated: January 2026

Craftsman model 917379071 is identified by its product date code, which gives you the year it was built. On many Craftsman walk-behind mowers, the date code is read as MMDDYY, so the last two digits indicate the year.

We recommend using the date-code instructions and location diagrams in the Craftsman 917379071 owner's manual. In most cases, you will find the code on a label near the engine, deck, or rear housing.

• Look for a sticker or stamped tag that includes a 6-digit number (often near the model/serial label)
• Read the code as MMDDYY (month, day, year)
• Use the last two digits as the year (example: 11 = 2011)
• If the label is dirty or faded, wipe it clean and use a flashlight at an angle
• Record both the model number and the date code for parts matching

The build year helps us match the correct parts and configurations for your Craftsman rotary lawn mower, especially for wear items like the blade, drive system, and control cables.

If you are servicing the cutting system while you check the label, inspect the blade and adapter for damage or wobble; a bent blade or worn adapter can cause vibration and poor cut quality. The lawn mower blade 532406713 is a common replacement item for this model.

Last updated: January 2026

On a Craftsman walk-behind mower like model 917379071, the model number is typically on the mower’s ID label or stamped tag on the deck or handle area, not on the engine itself. For exact label locations and diagrams, use the 917379071 manual.

Look for a sticker, metal tag, or stamped plate in these spots:

• Rear of the mower deck, near the discharge opening
• Top of the deck near the engine mounting area
• Back flap area (behind the bagger opening)
• Handle bracket or lower handle mount points
• Under the deck lip (wipe grass and dirt off first)

Your mower has two different identifiers; both can matter when ordering parts.

• Clean the deck and handle area with a dry rag; labels are often hidden by clippings.
• Use a flashlight and look at a low angle; stamped numbers can be faint.
• Write the number down exactly as shown; a single digit change can pull the wrong parts list.
• If you are servicing the drive system, match the mower model first, then confirm parts like the belt 532157769 if your diagrams call for it.

The mower model number ties your Craftsman rotary lawn mower to the correct parts diagrams (blade, belt, wheels, height adjusters). The engine number is separate and only applies to engine components.

Last updated: January 2026