Craftsman 917377841 gas walk-behind lawn mower Parts

For the Craftsman 917377841 gas walk-behind lawn mower, we use regular unleaded 87-octane gas for normal mowing. Higher octane (like 91) does not add power or improve performance in a mower engine; the key is using clean, fresh fuel and storing it correctly (see the owner's manual).

What to use (and what to avoid)

• Use: Fresh, regular unleaded 87 octane
• Avoid: Old or contaminated gas (it causes hard starting and rough running)
• Avoid: Storing gas from one season to the next in your can or mower
• Do: Replace a rusty gas can; rust and dirt in fuel create carburetor problems
• Do: Keep gasoline off wheels and finished surfaces when refueling

Why 91 octane usually is not worth it

Octane is mainly about preventing knock in high-compression engines. Most walk-behind mower engines are designed to run correctly on regular fuel, so paying for premium typically brings no benefit.

Quick comparison

Fuel choice	What you get	Best use case
87 octane (regular)	Correct performance for typical mower engines	Everyday mowing
91 octane (premium)	Higher knock resistance, not more power	Only if your engine specifically calls for it

Fuel freshness and storage tips (what matters most)

Stale fuel is one of the most common reasons a mower will not start. For best results:

• Buy only the amount of gas you will use in about 30 days
• Store fuel in a clean, approved gas can
• If you are storing the mower, run it until the tank is empty (or treat fuel per your routine)
• Never store the mower indoors with gas in the tank where fumes could reach a flame or spark

Why it matters

Using the right fuel helps prevent hard starting, surging, and carburetor varnish, which reduces downtime and extends engine life. Good fuel habits also support easier seasonal maintenance like spark plug replacement and tune-ups.

You can also order common replacement items and hardware for this model (for example, the lawn mower e-ring 812000058) from the parts list for Craftsman 917377841, or search by model number on Sears PartsDirect.

Last updated: February 2026

The model number is 917.377841; it identifies your specific Craftsman gas walk-behind lawn mower for ordering the correct parts and matching the right diagrams. You’ll see it printed in the parts breakdown in the owner's manual.

Where to find the model number on the mower

Check these common locations on Craftsman walk-behind mowers like model 917.377841:

• On the rear of the deck near the discharge opening
• On the deck top surface near the engine mounting area
• On a label near the handle mounting brackets
• In the parts list and exploded-view diagrams in the owner's manual

Why the model number matters when buying parts

Many parts look similar across Craftsman mowers, but fit and hardware sizes can differ. Using 917.377841 helps us match the correct items such as:

• Drive and wheel hardware (washers, lock nuts, retaining rings)
• Grass bag and chute components
• Drive control and gear case parts
• Handle and control parts

Quick check: model number vs. engine model

Your mower model number and engine model number are different identifiers.

Identifier type	Example for this mower	What it’s used for
Mower model number	917.377841	Deck, drive system, handle, bag, chute, wheels
Engine model number	Honda GCV190-AS3A	Engine-specific tune-up and engine parts

Ordering the right parts

We recommend using the mower model number first when selecting parts for the deck and drive system. For example, common hardware and assemblies listed for this model include items like the lawn mower grass bag 532410670 and lawn mower clipping deflector 583127101. You can also search by model number on Sears PartsDirect.

Why it matters

Using the exact model number prevents wrong-part returns and helps ensure safe operation, especially for drive components, blade-related hardware, and discharge parts.

Last updated: February 2026

Craftsman model 917377841 identifies the mower design and parts breakdown, but it does not provide a single “model year.” To determine the year your specific mower was built, use the date or serial information on the product ID label and cross-check details in the 917377841 owner's manual.

How to find the build date on the mower

Look for the product identification label (sometimes called the model/serial tag). Common locations on a Craftsman gas walk-behind mower include:

• Rear of the mower deck near the discharge area
• Top of the deck behind the engine
• Near the handle mounting brackets
• Near the drive control or gearcase area

What to record from the label

Write down every field exactly as shown; the year is typically derived from the serial/date code on the tag.

• Serial number (often contains a date code)
• Date of manufacture (DOM) if listed
• Product number or ID number (if separate from the model)
• Any stamped date on the deck or tag

Model number vs. serial number (what each tells you)

Identifier	What it tells you	What to use it for
Model number (917377841)	Which diagrams and parts list apply	Ordering correct mower parts
Serial/ID label	When your specific unit was produced	Determining build year
Engine model/type	Which engine service parts fit	Tune-up and engine parts matching

Why we do not use the model number to date it

On this Craftsman platform, the model number is a catalog identifier for parts and diagrams, not a date code. The reliable way to identify the year is the mower’s ID label information.

Ordering parts while you confirm the year

You can order parts by model number from the parts list for 917377841, and you can also search by model on Sears PartsDirect. If you are servicing the drive system, examples of model-matched parts include the lawn mower idler pulley 532166043 and the lawn mower selector spring 532188508.

Why it matters

Knowing the build year helps avoid mismatches when there are mid-production changes to drive control parts, wheels, handle hardware, or deck components.

Last updated: February 2026

Common problems on the Craftsman 917377841 gas walk-behind lawn mower are the same issues covered in its troubleshooting chart: loss of power, poor or uneven cut, excessive vibration, and a starter rope that’s hard to pull. We use the 917377841 owner's manual to match each symptom to the most likely cause and fix.

Common symptoms and what usually causes them

• Loss of power: cutting too much grass, grass and debris buildup under the mower housing, dirty air filter, oil level issues, walking speed too fast
• Poor or uneven cut: worn, bent, or loose blade; uneven wheel height settings; deck packed with clippings
• Excessive vibration: worn, bent, or loose blade; blade adapter problems; bent crankshaft (after impact)
• Starter rope hard to pull: blade dragging in grass, deck buildup, flywheel brake engaged when the control bar is released
• Self-propelled drive issues (common on many Craftsman walk-behind mowers): debris binding the rear drive wheels and dust cover area

Quick checks we recommend (safe and fast)

• Disconnect the spark plug wire before working near the blade or under the deck.
• Raise the cutting height if the mower bogs down in tall or wet grass.
• Clean the underside of the mower housing to restore airflow and blade lift.
• Check the air filter and replace it if it’s dirty.
• Verify wheel heights are set evenly on both sides.

Symptom-to-fix guide

Symptom	Most likely cause	What to do first
Loss of power	Deck buildup, dirty air filter	Clean underside; service air filter
Poor cut	Blade condition, wheel height mismatch	Inspect blade; set wheel heights evenly
Excessive vibration	Bent/loose blade or adapter	Tighten hardware; replace damaged parts
Rope hard to pull	Blade dragging, brake engaged	Raise height; check control bar operation

Why it matters

Correcting deck, blade, and airflow problems early improves cut quality and reduces strain on the engine and drive system.

If you need replacement hardware while servicing the deck or controls, model-matched items like the lawn mower idler pulley 532166043 and lawn mower handle knob 583106401 are available from the parts list for this mower, or you can search by model number on Sears PartsDirect.

Last updated: February 2026