Craftsman 917377660 gas walk-behind lawn mower Parts

On the Craftsman gas walk-behind lawn mower model 917377660, the model number is typically printed on a sticker on the rear of the mower deck, near the lower handle mounting area. Once you find it, match it exactly when ordering parts or using the 917377660 owner's manual.

Where to look on the mower

Check these common label locations on Craftsman walk-behind mower decks:

• Back of the deck (rear-facing side), between or near the lower handle mounts
• Rear discharge door area (look just above or beside the door hinge)
• Top of the deck near the engine mounting area (less common)
• Under the rear flap or bagger opening (use a flashlight)

Tips to read the label successfully

If the sticker is dirty or faded, these steps usually make it readable:

• Wipe the area with a damp rag and mild soap; avoid soaking the label
• Use a flashlight at an angle to highlight faint printing
• Take a close-up photo and zoom in to read the characters
• Write the number down exactly as shown (including dots or dashes if present)

Model number vs. serial number (quick guide)

Use the model number for parts lookup; the serial number is mainly for manufacturing identification.

Item	What it’s used for	Example format
Model number	Finding diagrams and correct replacement parts	917.377660 or 917377660
Serial number	Production tracking and date coding	Varies by manufacturer

Why it matters

Craftsman walk-behind mowers often share similar decks and handles across multiple models, but parts like the drive system, handle hardware, and gearcase components can differ. Using the exact model number helps ensure the right fit the first time.

Last updated: January 2026

For a Craftsman gas walk-behind lawn mower model 917377660, it’s usually cheaper to repair when the problem is routine maintenance or a single worn part; it’s usually cheaper to replace when the repair involves major drivetrain or engine damage, or when total repair cost approaches about half the price of a comparable new mower.

Quick rule of thumb we use

• Repair if it’s a tune-up item (blade, belt, cable, fasteners) or a simple adjustment.
• Replace if the engine crankshaft is bent, the mower has repeated major failures, or the repair estimate is close to 50% of a new mower.
• Repair first when the mower is otherwise in good shape and you can do the work yourself.

Common repairs that are usually worth it

These are typical on walk-behind mowers and often restore performance quickly:

• Sharpen or replace a dull/bent blade (a sharp blade improves cut quality and reduces strain)
• Clean grass buildup under the deck (helps with hard-to-push and poor bagging)
• Fix loss of drive by checking the drive belt and drive control adjustment
• Replace a worn/broken drive cable
• Clean rear drive wheels if they stop turning freely due to debris

For model-specific maintenance steps and torque guidance, follow the 917377660 owner’s manual.

Repairs that often push you toward replacement

Major issues can be expensive because they involve labor, special tools, or multiple parts:

• Bent engine crankshaft (often happens after a blade strike)
• Persistent “won’t start” problems after fuel system and ignition basics are addressed
• Repeated drive system failures (belt, pulleys, and control system all worn)

Cost comparison guide

Situation	Typical best choice	Why
Blade dull, mower vibrates, uneven cut	Repair	Usually a single maintenance fix
Loss of drive or slowing drive speed	Repair	Often belt/cable/adjustment related
Bent crankshaft or severe engine damage	Replace	High labor and parts cost
Multiple major problems at once	Replace	Total cost stacks up fast

Why it matters

Repairing the right problem keeps your 917377660 cutting safely and efficiently. The manual also calls out safety steps like disconnecting the spark plug wire before blade service and using the correct blade-bolt torque, which helps prevent repeat failures.

Last updated: January 2026

A typical gas walk-behind lawn mower lasts 8 to 10 years with normal residential use and consistent maintenance. For your Craftsman 917377660, following the maintenance schedule in the Craftsman 917377660 owner's manual helps the engine run cooler, start easier, and last longer.

What most affects mower lifespan

• Oil care: check oil before each use; change oil on schedule
• Air filter condition: clean or replace when dirty (dusty mowing shortens life)
• Spark plug service: replace at the start of each season or every 100 hours
• Deck and engine cleaning: built-up grass makes the engine run hotter
• Storage habits: avoid storing with fuel indoors; keep the mower dry and covered

Maintenance timeline we recommend

Task	Typical interval	Why it matters
Check engine oil level	Before each use	Prevents rapid engine wear
Clean underside of deck	After each use	Reduces corrosion and drag
Clean under drive cover	At least twice per season	Helps self-propel system work smoothly
Replace spark plug	Each season or 100 hours	Improves starting and power
Replace/clean air filter	At least yearly (more in dust)	Protects engine from dirt

Signs your mower is nearing end-of-life

• Hard starting even with fresh fuel and a good spark plug
• Noticeable loss of power in normal grass
• Excessive vibration (often tied to blade or adapter wear)
• Persistent smoking or oil consumption
• Drive system slipping or not pulling consistently

Why it matters

Most “worn out” gas mowers fail early from heat, dirty air intake, or neglected oil changes. Keeping the deck clean and staying on top of tune-up items extends the service life and reduces expensive engine or drive repairs.

Last updated: January 2026