Craftsman 917377940 rotary lawn mower Parts

For Craftsman rotary lawn mower model 917377940, we find the model and serial number on the decal on the rear of the lawn mower housing (rear of the deck). Use that model number to look up the correct parts list and the matching diagrams in the owner's manual.

Where to find the model number on this mower

Check these spots on the mower deck (housing):

• Rear of the mower housing (most common location)
• Rear-facing area of the deck near the discharge or bagging opening
• Near the height-adjustment hardware on the deck (look for a decal)
• On the deck surface just behind the engine (if the decal was placed higher)

How to read the label correctly

Use the label exactly as printed so you get the right Craftsman parts and diagrams.

• Write down model number and serial number
• Keep the date of purchase with your records
• Match punctuation and digits (example: the manual shows 917.377940, and the model is 917377940)

Quick lookup checklist

Use this checklist before ordering parts like a wheel, drive control lever, or grass bag components.

• Confirm the model number is 917377940
• Confirm the product type is a gas, walk-behind rotary lawn mower
• Use the exploded views to identify the exact part you need
• If you are replacing drive parts, match the diagram callout to the part listing

Common parts you may identify by model lookup

Once you have the model number, these are examples of parts that are model-matched by diagram callout:

What you are fixing	Example part on this model	What it affects
Self-propel/drive control	Lawn mower drive control lever 532425662	Engagement of the drive system
Rear wheel wear or damage	Husqvarna lawn mower wheel 532192622	Traction and cutting height consistency
Bagging hardware damage	Lawn mower grass bag frame 532188506	Bag fit and sealing at the rear door

Why it matters

Using the exact model number prevents ordering the wrong blade-drive, wheel, or grass bag parts. Craftsman walk-behind mowers often look similar across years, but the drive control, wheel assemblies, and hardware can differ by model.

Last updated: February 2026

For a Craftsman rotary lawn mower model 917377940, repairing is usually cheaper when the fix is a wear item (blade adapter, drive parts, wheels, cables) and you do the work yourself. Replacing is often cheaper when the engine or transmission needs major work or multiple systems are failing.

Quick way to decide (cost vs. value)

Use this simple rule: if the repair total is under about 50% of the cost of a comparable new mower, repair it; if it is over 50%, replacement usually makes more sense.

• Add up parts you know you need (belt, blade adapter, wheel, cable, etc.)
• Add tool costs if you do not already own them
• If paying a shop, include labor and diagnostic fees
• Consider age and overall condition (deck rust, handle damage, recurring starting issues)

Common repairs that are usually worth it

These are typical DIY-friendly fixes that often restore performance for less than replacement:

• Drive system issues (belt off/worn, loose drive control adjustment)
• Worn wheels or wheel hardware
• Control cable or lever problems
• Blade-related vibration or poor cut (blade adapter wear, loose blade bolt)
• Grass bagging issues (bag door not sealing, bag frame damage)

For model-specific adjustment and maintenance steps, follow the owner's manual.

Repairs that often push you toward replacement

These problems can get expensive fast, especially if you are paying for labor:

• Engine internal damage (hard to pull rope, low compression, crankshaft issues)
• Repeated no-start problems after fuel system and ignition tune-up
• Transmission failure or severe drive wear
• Multiple major issues at once (engine + drive + deck)

Example cost comparison (typical)

Situation	Typical parts cost	Typical labor	Usually cheaper
Replace a wheel or hardware	Low	None to low	Repair
Fix self-propel drive (belt/adjustment)	Low to medium	Low to medium	Repair
Replace transmission assembly	High	Medium to high	Replace (often)

Why it matters

A walk-behind mower like the Craftsman 917377940 is designed for routine service. The manual notes that many items are normal wear parts (for example blades, blade adapters, belts, air cleaners, spark plug), so budgeting for periodic repairs can extend mower life and keep cutting quality consistent.

Helpful parts for common fixes: if your self-propel system is acting up, the lawn mower transmission assembly 532188294 is one of the key drive components used on this model.

Last updated: February 2026

Most gas-powered walk-behind mowers last 8 to 10 years with normal residential use and routine maintenance. For your Craftsman rotary lawn mower model 917377940, following the maintenance schedule and proper storage steps in the owner's manual is what consistently delivers the longest service life.

Typical lifespan by use

• Residential, maintained: 8 to 10 years
• Heavy residential (dusty, hot, frequent mowing): 6 to 8 years
• Commercial or rental use: 3 to 5 years

What extends mower life the most

The biggest life-extenders are basic upkeep and keeping the engine and deck clean.

• Change engine oil on schedule (more often in heat or heavy load)
• Clean or replace the air filter regularly
• Replace the spark plug at recommended intervals
• Keep the underside of the deck clean after each use (scrape, do not soak)
• Tighten loose fasteners and inspect drive components periodically
• Stabilize fuel or empty the fuel system before storage

Quick maintenance checklist (high impact)

Task	Why it matters	When to do it
Clean under deck	Prevents corrosion and performance loss	After each use
Check oil level	Prevents engine wear	Before each use
Change engine oil	Extends engine life	Per schedule/season
Replace spark plug	Improves starting and power	Per schedule
Clean under drive cover	Protects belt and pulleys	At least twice a season

Why it matters

A mower usually gets retired early because of preventable issues: dirty cooling fins and engine buildup (runs hotter), neglected oil changes, stale fuel during storage, or running with a dull blade that overloads the engine. Keeping up with these basics costs less than major repairs and keeps cut quality consistent.

Last updated: February 2026

The model number 917377940 identifies the Craftsman walk-behind mower design and parts list; it is not a date code. To determine the year, we use the mower’s product/serial label on the deck and, if needed, the engine code shown on the engine itself; see the identification section in the owner's manual.

How to find the information you need

Look for a sticker or stamped tag on the mower, then (optionally) the engine code.

• Mower deck label: top of the deck near the rear, or on the side by the discharge opening
• Rear housing: near wheel brackets or height adjusters
• Handle mount area: around the handle brackets
• Engine shroud/blower housing: model and a separate code string (varies by engine brand)

How to use what you find

Use this quick guide to turn the label/code into a year.

What you found	What it means	Best next step
Model number: 917377940	Mower family and parts breakdown	Use it to match diagrams and parts
Product/serial number on deck label	Primary identifier for production timeframe	Compare it to the identification guidance in the manual
Engine model and code string	Engine build date (often close to mower year)	Decode using the engine’s code format, then use as a timeframe

Engine code decoding (works even when engine brand varies)

This model can be paired with different engine makes across production runs, so the code format depends on what is installed. Use the engine’s own label to identify the make first.

• Briggs and Stratton: look for a “Model Type Code” line; the Code is the date
• Honda: look for the engine model (such as GCV series) and a serial; date is tied to the serial range
• Other engines: use the engine model plus its code/serial to determine the build timeframe

Why it matters

The correct year or production range helps us match the right revisions for drive and control parts on Craftsman 917377940, such as the lawn mower drive control lever 532425662 and lawn mower transmission assembly 532188294.

Last updated: February 2026