Craftsman 917377941 rotary lawn mower Parts

The model number is 917.377941 (often written without the dot as 917377941) for this Craftsman rotary lawn mower. You can confirm it on the identification label and in the owner's manual for the mower.

Where to find the model number on the mower

Most Craftsman walk-behind mowers list the model number on a product label located on the deck or rear housing area.

• Check the rear of the mower deck near the discharge or bagging area
• Look around the engine mounting area on the deck
• Wipe dirt and grass residue off the label so the full number is readable
• Record the full model number exactly as shown (including any dot)

Why the dot matters (917.377941 vs 917377941)

Both formats typically refer to the same mower; the dot is a formatting style used in manuals and labels.

You see this	What it means for parts lookup
917.377941	Same model; manual-style formatting
917377941	Same model; common online lookup format

Why it matters when ordering parts

Using the exact model number helps us match the correct diagrams and parts for your Craftsman rotary lawn mower, especially for drive and bagging components.

Common examples on this model include:

• Drive system parts like the lawn mower drive control lever 532425662
• Rear wheel and traction components
• Grass bag and door hardware
• Blade mounting hardware (adapter, washers, lock nuts)

Quick tip for accurate parts matching

If your mower label is worn, use the parts list diagrams in the owner's manual to cross-check assemblies (handle, drive control, gear case, grass bag) against what you see on your mower.

Last updated: January 2026

To troubleshoot your Craftsman 917377941 walk-behind mower, start by identifying the symptom (won’t start, starts then dies, poor cut, or won’t self-propel) and check the simple items first: fuel, spark, airflow, and blade/deck condition. Use the 917377941 owner's manual for the correct control positions and adjustment points.

Quick symptom checklist

• Won’t start: stale fuel, spark plug/wire issue, safety control not held, clogged air filter
• Starts then dies: dirty carburetor, fuel cap vent issue, debris in fuel, choke not opening
• Poor cut or vibration: bent/dull blade, loose blade hardware, damaged blade adapter
• Won’t self-propel: drive cable out of adjustment, worn belt/pulley, transmission issue

Step-by-step: fastest checks first

1. Safety first: disconnect the spark plug wire before inspecting the blade or underside.
2. Fuel: drain old fuel and refill with fresh gasoline.
3. Spark: confirm the plug wire is firmly seated; replace the spark plug if fouled.
4. Airflow: clean or replace the air filter.
5. Blade and adapter: inspect for damage; a worn adapter can cause slipping and vibration (this model uses a blade adapter style like lawn mower blade adapter 532186766).
6. Self-propel drive: check cable tension and linkage movement; inspect pulleys for wobble or binding (an example drive pulley is the lawn mower idler pulley 532166043).

What to inspect based on the problem

Problem	What to inspect	Common fix
No start	fuel, spark plug, air filter	fresh fuel, new plug, clean filter
Runs rough	carburetor, choke, fuel flow	clean carburetor, clear fuel path
Vibrates	blade, blade adapter, fasteners	replace blade/adapter, tighten hardware
No drive	drive cable, pulleys, transmission	adjust cable, replace worn pulley/belt

Why it matters

Systematic troubleshooting prevents unnecessary parts replacement and helps you focus on the highest-failure items first (fuel quality, ignition, airflow, and drive adjustments). The diagrams and procedures in the manual keep adjustments correct for the 917377941.

Last updated: March 2026

A Craftsman rotary walk-behind mower like model 917377941 typically lasts 8 to 12 years with normal residential use and basic maintenance. Regular oil changes, clean air filtration, and keeping the deck and drive system adjusted are what most often determine whether it reaches the high end of that range.

What affects lifespan most

• Engine maintenance: clean oil, clean air filter, fresh fuel
• Cutting load: tall, wet grass and frequent mulching increase strain
• Deck condition: corrosion and impact damage shorten life
• Drive system wear (self-propelled): belt, pulleys, transmission, and cables
• Storage: dry storage and off-season fuel care prevent hard-start issues

Typical lifespan by major system

System	Typical service life	What usually ends it
Engine	8 to 12 years	neglected oil, dirty cooling fins, stale fuel
Deck and handle	10+ years	rust-through, cracks, impact damage
Self-propel drive	5 to 10 years	worn transmission, pulleys, stretched cables
Wheels and height adjust	5 to 10 years	worn wheel hubs, bent adjusters

Maintenance that adds years (high impact)

• Change engine oil on schedule and keep the oil at the correct level.
• Use fresh gasoline; don’t store fuel in the tank for long periods.
• Keep the underside of the deck clean (after the mower is cool and the spark plug wire is disconnected).
• Inspect and tighten hardware; replace worn fasteners like a lock nut 532409149 when needed.
• Keep the drive controls adjusted so the mower drives without slipping or dragging.

Why it matters

Most “mower won’t start” and “won’t self-propel” complaints trace back to routine wear items and maintenance, not the mower being at end-of-life. Following the service intervals in the 917377941 owner's manual helps you avoid premature engine and drive failures.

Last updated: March 2026