Craftsman 917377942 lawn mower Parts

Common problems on the Craftsman 917377942 gas walk-behind mower include loss of power, uneven cutting, excessive vibration, a starter rope that’s hard to pull, poor bagging, hard pushing, and loss of drive or slow drive speed. Our owner's manual troubleshooting chart points you to the most likely causes and fixes.

Quick checks that solve most issues

• Use fresh gasoline; old fuel is a top cause of hard starting and stalling.
• Check and clean or replace the air filter if the engine runs rough or lacks power.
• Inspect the blade for wear, bends, or looseness; vibration and poor cut quality often start here.
• Clean packed grass and debris from under the deck; buildup can cause power loss and uneven cutting.
• Verify wheel height settings match side-to-side for an even cut.
• If self-propelled drive slows or slips, inspect the drive control parts and cable adjustment.

Symptoms and the most common causes

Symptom	Most common causes	What to do first
Loss of power	Cutting too much grass, dirty air filter, grass buildup under deck, too much oil, walking speed too fast	Raise cutting height, clean deck, check air filter and oil level
Uneven cut	Worn/bent/loose blade, uneven wheel heights, deck buildup	Level wheel heights, clean deck, inspect blade
Excessive vibration	Worn/bent/loose blade, bent crankshaft	Stop mowing, inspect blade and adapter
Starter rope hard to pull	Blade dragging in grass, brake engaged, possible internal binding	Tip mower safely, clear debris, check blade area
Loss of drive / slow drive	Drive control/cable issues, pulley wear	Check control lever and cable operation

Model-specific parts that often relate to these problems

If you’re diagnosing drive issues or control problems on model 917377942, these model-matched parts are commonly involved:

• Lawn mower drive control lever 532425662 (drive engagement feel and travel)
• Husqvarna lawn mower drive control cable 532197011 (slack, stretch, or binding)
• Husqvarna lawn mower idler pulley 532166043 (belt tension and drive speed)
• Lawn mower blade adapter 532186766 (vibration, blade fit, hard-to-pull rope)
• Husqvarna lawn mower 21-in deck 3-in-1 blade 532189028 (cut quality and vibration)

Why it matters

Most “mower problems” trace back to airflow (air filter), fuel quality, or drag from a dirty deck or damaged blade. Fixing those basics first protects the engine, improves cut quality, and prevents drive components from wearing out early.

Last updated: February 2026

For the Craftsman 917377942 gas walk-behind mower, we recommend unleaded regular gasoline; the owner’s manual lists the fuel type as unleaded regular with a 1.0 quart tank capacity. See the fuel and safety details in the 917377942 owner's manual.

What to use (and what to avoid)

Use fresh fuel and keep it clean so the carburetor and fuel system stay reliable.

• Use unleaded regular gasoline
• Use fresh gas (old fuel can cause hard starting and rough running)
• Keep the gas can clean and replace it if it starts to rust
• Avoid storing gasoline from one season to the next
• Never refuel near sparks or open flame; let the engine cool first

Quick fuel guidance

Fuel question	Best practice for this mower
Octane grade	Regular unleaded is the right choice
Ethanol blends	E10 is commonly used with regular unleaded; use fresh fuel and do not let it sit
How much to add	Fill as needed; tank capacity is 1.0 quart

Why it matters

Using the correct fuel and keeping it fresh helps prevent stale-fuel starting problems, reduces deposits in the fuel system, and supports consistent power when mowing.

Helpful related maintenance tip

If you are putting the mower away for a while, follow the storage guidance in the manual (including not storing the mower indoors with gasoline in the tank where fumes could reach a flame or spark).

Last updated: February 2026

The model number for your Craftsman walk-behind mower is printed on the mower’s model and serial number label; for this unit it’s 917.377942 (often shown as 917377942 online). Use the label number to match the correct diagrams, manual, and replacement parts.

Where to look on the mower

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

• On the rear of the deck near the discharge opening or rear door area
• On top of the deck near the engine mounting area
• Near the rear wheel height adjuster area
• On the handle support/bracket area close to the deck

What the number should look like

In the documentation, the mower is listed as Model No. 917.377942. You may see it in a few formats:

Where you see it	Example	What it means
Product label/manual	917.377942	Full model number format
Parts lookup/online	917377942	Same model number without the dot
Model/serial tag	Model + Serial	Serial is for manufacturing info, model is for parts

Tips to avoid ordering the wrong parts

Using the exact model number matters because small design changes affect items like the drive control, wheels, and blade hardware.

• Copy the model number exactly from the label (including any dots)
• Use the model number to confirm the correct manual and diagrams in the 917377942 owner's manual
• If the label is damaged, compare your mower’s assemblies to the diagrams (handle, grass bag door, drive control)
• Keep the serial number for reference, but use the model number for parts matching

Why it matters

Craftsman model numbers identify the exact deck, drive system, and hardware used on your mower. That is what ensures parts like a blade adapter, drive control cable, or wheel assembly match and fit correctly.

Last updated: March 2026