Craftsman 917378381 lawn mower Parts

On a Craftsman walk-behind mower like model 917378381, the model number is typically printed on a sticker or tag on the mower deck, most often on the rear area of the deck near the handle mounting points. Use the exact model number to match the correct parts list and diagrams in the 917378381 owner's manual.

Check these common locations first (wipe dirt and grass off the deck so the label is readable):

• Back of the mower deck, between or near the lower handle mounts
• Rear of the deck near the discharge door or bagger opening
• Side of the deck near the rear wheel height adjuster area
• Under the rear flap or near the grass bagger frame mounting points
• On the handle support/bracket area (less common)

Record the full model number exactly as shown, plus any serial number if present.

• Model number: identifies the exact mower configuration (drive system, deck, handle hardware)
• Serial number: helps match production changes when ordering replacement parts
• Product name: “Craftsman rotary lawn mower” may appear, but the model number is what matters

Use this checklist to confirm you found the right tag:

• The label clearly shows 917.378381 or 917378381
• The print is stamped or on a durable sticker (not a store barcode)
• The tag is attached to the mower deck, not the grass bag

Once you have the model number, you can accurately match wear items and drive parts, such as:

Using the exact Craftsman model number prevents ordering the wrong drive belt, wheel parts, or handle hardware, and it ensures the exploded-view diagrams match your mower during repair.

Last updated: January 2026

For the Craftsman 917378381 gas walk-behind mower, we recommend fresh, clean unleaded gasoline; regular 87-octane is the standard choice. Avoid old fuel, and use fuel stabilizer when the mower will sit for weeks so you do not end up with stale fuel issues (a common no-start cause). See the 917378381 owner's manual for the exact fuel guidance and safety notes.

• Use fresh unleaded gasoline (typically 87 octane).
• Choose ethanol-free gas when you can; it stores better and helps reduce moisture-related fuel problems.
• If you must use E10 (10% ethanol), buy only what you will use soon.
• Do not use E15 or E85.
• Do not mix oil into the gas (this is a 4-cycle mower engine).

The manual calls out stale fuel and water in fuel as common reasons a mower will not start, and it also recommends running the engine until the fuel system is empty for longer storage.

• Add fuel stabilizer to fresh gas before storage.
• For storage of 30 days or longer: empty the tank, then run the engine until it stops.
• Start each season with fresh fuel.
• Keep the gas can sealed; store it in a cool, dry place.

If you added gas and the mower still will not start, check these basics first:

• Confirm the tank actually has fuel.
• Replace stale fuel with fresh fuel.
• Check for water-contaminated fuel (drain and refill if suspected).
• Inspect the air filter and spark plug condition.
• If the starter rope is hard to pull, follow lawn mower pull cord stuck.

Using the right fuel and keeping it fresh helps prevent hard starting, rough running, and carburetor varnish. It also reduces the chance of moisture getting into the fuel system, which can lead to “water in fuel” symptoms.

Last updated: January 2026

A Craftsman walk-behind gas mower like model 917378381 typically lasts 8 to 12 years with normal residential use and routine maintenance. Lifespan is driven most by engine care, blade impacts, and how clean and adjusted the drive system stays; see the 917378381 owner's manual for the maintenance schedule.

• Light use (small yard, weekly mowing): 10 to 12 years
• Average use (moderate yard, seasonal mowing): 8 to 10 years
• Heavy use (large yard, long seasons, rough terrain): 6 to 8 years

• Hitting rocks, roots, or curbs (bends blades, stresses crankshaft and adapter)
• Running low or dirty oil (accelerates engine wear)
• Old fuel or no stabilizer during storage (carburetor and starting issues)
• Cutting too low in thick grass (overloads engine and drive)
• Not cleaning the deck and bagger (reduces airflow and increases strain)

• Change oil at the interval listed in the manual; use the recommended viscosity.
• Keep the blade sharp and balanced; replace damaged hardware if it will not torque correctly.
• Clean under the deck and keep the grass bagger clear.
• Inspect self-propel components each season; replace worn drive parts early.
• Store with stabilized fuel or run the system dry for off-season storage.

Knowing the typical 8 to 12 year lifespan helps you decide whether to tune up (belt, cable, blade adapter) or replace the mower. On this model, restoring drive performance and keeping the cutting system clean often delivers the biggest improvement per dollar.

Last updated: March 2026