Craftsman 917377110 gas walk-behind lawn mower Parts

For the Craftsman 917377110 gas walk-behind lawn mower, we recommend using regular unleaded 87-octane gasoline for normal mowing. Higher octane (like 91) does not add power or improve reliability in small mower engines; using fresh fuel and the right storage practices matters far more. See the fuel guidance and safety notes in the Craftsman 917377110 owner's manual.

What to use (and what to avoid)

• Use fresh, regular unleaded 87 octane.
• Buy fuel in small quantities so it gets used within 30 days.
• Use a fuel stabilizer if the mower will sit more than a couple of weeks.
• Avoid old gas; stale fuel is a top cause of hard starting and rough running.
• Avoid overfilling the tank; leave room for expansion.

87 vs 91: quick comparison

Fuel choice	Best for	What you should expect
87 octane (regular)	Everyday mowing	Normal starting, power, and engine life
91 octane (premium)	Not needed unless the engine specifically calls for it	Typically no performance benefit

Why it matters

Octane is mainly about knock resistance, not “cleaner burning” or “more power.” Most walk-behind mower engines are designed to run correctly on regular fuel; the bigger risk is stale gas causing carburetor varnish, hard starts, surging, and poor acceleration.

If your mower runs poorly after fueling

Try these checks before replacing parts:

• Drain old fuel and refill with fresh 87 octane.
• Inspect the air filter and spark plug condition.
• Check for fuel leaks and make sure the fuel cap vents properly.
• If the mower sat with fuel in it, clean the carburetor bowl and jets (common fix).

For off-season storage steps, follow how to winterize a lawn mower.

Last updated: January 2026

Most gas walk-behind lawn mowers like the Craftsman 917377110 last 8 to 15 years with normal homeowner use; 10 years is a solid average when you keep up with oil changes, clean the deck, and keep the blade sharp. For model-specific maintenance intervals, use the Craftsman 917377110 owner's manual.

Typical lifespan by mower type

Lifespan depends heavily on engine hours, storage, and maintenance.

• Gas walk-behind mower: 8 to 15 years
• Electric walk-behind mower: 5 to 10 years (battery life is the limiter)
• Riding mower: 10 to 15 years
• Commercial-grade equipment: 15+ years with frequent service

What you do	What it affects	Typical result
Change oil on schedule	Engine wear	Longer engine life, easier starting
Sharpen or replace blade	Cut quality, engine load	Cleaner cut, less bogging
Clean grass buildup under deck	Airflow, corrosion	Better discharge, less rust
Store with stabilized fuel	Carburetor/fuel system	Fewer no-start issues after storage

Signs your mower is near end-of-life

If you see several of these at once, repairs can start to outweigh the value.

• Hard starting even after a tune-up (spark plug, fresh fuel, clean air filter)
• Excessive vibration (often from a bent blade or worn blade mount)
• Self-propel drive slipping or not pulling consistently
• Oil consumption, smoking, or loss of compression
• Rust-through or cracking around the deck and mounting points

Maintenance that adds years (and saves parts)

These habits reduce strain on the engine, blade adapter, wheels, and drive system.

• Mow when grass is dry and not overgrown
• Keep the blade sharp; a dull blade forces the engine to work harder
• Clean the underside of the deck after mowing (with the spark plug wire disconnected)
• Use fresh gas and add fuel stabilizer before storage
• Inspect fasteners and wear items; replace damaged hardware promptly

Helpful DIY guidance

• How to winterize a lawn mower
• How to sharpen a lawn mower blade

Why it matters

A mower that is maintained typically lasts years longer, cuts cleaner, and avoids common failures like carburetor clogging, drive wear, and premature engine damage. That means fewer breakdowns mid-season and lower total cost of ownership.

Last updated: January 2026

On a Craftsman gas walk-behind lawn mower like model 917377110, the model number is printed on the mower’s identification label (not on the engine label). Once you find it, match that exact number when ordering parts and using the Craftsman 917377110 owner's manual.

Where to look on the mower

Check these common label locations on walk-behind mowers:

• On the rear of the deck near the discharge opening
• On top of the deck near the engine mounting area
• On the back flap area behind the engine (rear discharge models)
• On the handle bracket or height-adjuster area
• Under the grass bag door area (bagging models)

What number you actually need (mower vs. engine)

Many mowers have two different ID labels. For Sears PartsDirect parts lookup, use the mower model number.

Label you find	What it identifies	When to use it
Mower model label (example: 917377110)	The mower chassis and drive system	Use for wheels, drive parts, deck parts, handle parts
Engine label (often on the blower housing)	The engine manufacturer and engine model/type	Use for engine-specific items like carburetor, ignition, air filter, starter

Tips if the label is dirty or hard to read

• Wipe the area with a damp rag first; then dry it
• Use a flashlight at an angle to make faint printing easier to see
• Take a close-up photo and zoom in
• Write down the full model number exactly as shown (all digits)

Why it matters

The correct model number ensures you get parts that fit your exact Craftsman deck and drive configuration, such as the lawn mower drive control lever 532425662 or the correct wheel and chute components.

Last updated: January 2026