Craftsman 917378410 gas walk-behind lawn mower Parts

On a Craftsman gas walk-behind mower like model 917378410, the model number does not tell the year. To find the year, we use the engine or mower serial/ID label and decode it using the format shown in your documentation and ID tag guidance in the 917378410 owner's manual.

Look for a sticker or stamped tag in one of these common spots:

• Rear of the mower deck (near the discharge opening)
• Under the handle mounting area
• Near the engine mounting bolts on the deck
• On the engine shroud (engine model and serial are often separate from the mower model)

Many Craftsman mower and engine ID labels use a 6-digit date code in this pattern:

• First 2 digits = month (01 to 12)
• Next 2 digits = day (01 to 31)
• Last 2 digits = year (00 to 99)

If your serial number is longer, includes letters, or does not look like a date:

• Check the engine serial number separately; it may use a different format
• Compare the label format to the identification section in the 917378410 owner's manual
• Use the mower model 917378410 to match the correct parts diagrams, then confirm the build era by the engine ID and hardware style

The correct year helps when you are matching maintenance items and drive components (like belts, wheels, and control cable routing) so you get parts that fit your exact Craftsman walk-behind mower configuration.

Last updated: January 2026

A typical gas walk-behind lawn mower lasts 8 to 10 years with normal residential use and consistent maintenance. For Craftsman model 917378410, following the maintenance and cleaning steps in the 917378410 owner's manual helps maximize engine life and reduce premature wear.

• Maintenance frequency (oil changes, tune-ups, inspections)
• Cleaning habits (especially under the deck and around the engine)
• Storage practices (dry storage, end-of-season prep)
• Operating conditions (dusty mowing, tall or wet grass, steep slopes)
• Wear items replaced on time (blade, belts, air cleaner, spark plug)

The manual calls out a few high-impact items that directly affect longevity:

• Clean the underside of the deck after each use to prevent grass buildup.
• Keep the engine area clear of debris; a clogged engine runs hotter and shortens engine life.
• Change the spark plug yearly and set the gap to 0.030 inch.
• Clean under the drive cover at least twice per season.
• Avoid spraying water into sensitive areas; water intrusion can shorten engine life.

The warranty section in the manual lists common “expendable” items that wear during normal use.

Most “mower lifespan” problems are really engine heat, debris buildup, and delayed tune-ups. Keeping the deck and engine clean and doing seasonal service prevents power loss and reduces stress on the drive system.

Last updated: January 2026

The model number for this Craftsman gas walk-behind lawn mower is 917.378410 (often written without the dot as 917378410). You’ll see it printed on the mower’s model tag and on the cover of the 917378410 owner's manual.

We recommend checking these common locations on Craftsman walk-behind mowers:

• On the rear of the deck near the discharge door
• On the side of the deck near a rear wheel
• Near the handle mounting brackets
• On a sticker or metal plate that also lists engine details

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

It’s normal to find other identifiers on the mower. These do not replace the mower model number.

• Engine model number (separate from the mower model)
• Serial number (unique to your specific unit)
• Part numbers for components (for example, a wheel or control cable)

If you’re confirming you’re on the right parts list, these are examples of parts shown for this model:

• Control cable 532168552 (engine zone control cable)
• Lawn mower wheel 532150341
• Lawn mower ground drive belt, 3/8 x 32-1/2-in 532175436

Using the exact model number helps us match the correct diagrams and parts (like the drive belt, wheel, or blade adapter) so you avoid ordering a similar-looking part that won’t fit.

Last updated: January 2026