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Craftsman 247.379550 - User Manual

Craftsman 247.379550
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CAUTION: Before using this product,
read this manual and follow all safety
rules and operating instructions.
Operator’s Manual
• SAFETY
• UNPACKING P. 8
• ASSEMBLY
• OPERATION
• MAINTENANCE
• ESPAÑOL
Sears Brands Management Corporation, Hoffman Estates, IL 60179, U.S.A.
Visit our website: www.craftsman.comUsed under license
21” LAWN MOWER
Model No. 247.379550
Form No. 769-12991
(December 8, 2017)

Table of Contents

Questions and Answers

  • K
    Karen PopeAug 12, 2025
    Why Craftsman 247.379550 Lawn Mower engine fails to start?
    • P
      Patrick WebbAug 12, 2025
      Your Craftsman Lawn Mower might fail to start due to several reasons: * The blade control might be disengaged, so engage the blade control. * The spark plug boot might be disconnected, so connect the wire to the spark boot. * The fuel tank might be empty or contain stale fuel, so fill the tank with clean, fresh gasoline. * The engine might not be primed (if equipped with a primer), so prime the engine as instructed in the Operation section. * The spark plug might be faulty, so clean, adjust the gap, or replace it. * The engine might be flooded, so wait a few minutes to restart. * The fuel line might be blocked, so contact your Sears Parts & Repair Center to have the fuel line cleaned.
  • A
    Adam ObrienAug 16, 2025
    What causes uneven cut with Craftsman Lawn Mower?
    • R
      Richard PenaAug 16, 2025
      An uneven cut with your Craftsman Lawn Mower could be due to: * Incorrect wheel positioning: Adjust the cutting height lever on the right front and right rear wheels to the same position. * A dull blade: Sharpen or replace the blade.
  • B
    Bethany SuttonAug 23, 2025
    What to do if Craftsman 247.379550 will not self propel?
    • L
      Luke ShieldsAug 23, 2025
      If your Craftsman Lawn Mower won't self-propel, here are some things to check: 1. Belt Installation: Make sure the belt is properly installed on the pulleys and moves freely. 2. Debris: Stop the engine, disconnect the spark plug boot, and clean out any debris that may be clogging the drive operation. 3. Belt Condition: Inspect the belt for damage or wear. If necessary, contact your Sears Parts & Repair Center to have the belt replaced. 4. Drive Control: Adjust the drive control. Refer to page 11 in the Assembly & Set-up section.
  • M
    Megan SimmonsAug 27, 2025
    Why Craftsman Lawn Mower idles poorly?
    • D
      David GarrettAug 27, 2025
      Craftsman Lawn Mower may idle poorly because of: * A spark plug that is fouled, faulty, or has a gap that is too wide: Reset the gap or replace the spark plug. * A dirty air cleaner: Refer to Air Cleaner Maintenance in the Engine Manual.
  • B
    bowmanbrianAug 30, 2025
    Why Craftsman 247.379550 engine overheats?
    • F
      Frank SnyderAug 31, 2025
      The Craftsman Lawn Mower engine may overheat due to: * Low engine oil level: Fill the crankcase with the proper oil. * Restricted airflow: Clean the area around and on top of the engine.
  • J
    jacob58Sep 3, 2025
    What causes excessive vibration in Craftsman 247.379550?
    • S
      steelesandraSep 4, 2025
      Excessive vibration in your Craftsman Lawn Mower can be attributed to: * A loose or unbalanced cutting blade: Tighten the blade and adapter, and balance the blade. * A bent cutting blade: Replace the blade.
  • B
    bwalkerSep 7, 2025
    Why is there high pullback effort on Craftsman 247.379550?
    • S
      Sandra ThompsonSep 7, 2025
      High pullback effort on your Craftsman Lawn Mower is caused by pulling the mower backwards before the transmission disengages. Allow the unit to roll forward slightly without the drive lever(s) engaged before pulling backwards.
  • R
    robinsonpaulSep 10, 2025
    What to do if Craftsman Lawn Mower engine runs erratic?
    • M
      Michelle RomeroSep 12, 2025
      If your Craftsman Lawn Mower engine runs erratically, consider these potential causes and solutions: * A loose spark plug boot: Connect and tighten the spark plug boot. * Stale fuel: Replace the old fuel with clean, fresh gasoline. * A plugged vent in the gas cap: Clear the vent. * Water or dirt in the fuel system: Run the engine until it stops due to lack of fuel, then refill with fresh fuel. * A dirty air cleaner: Refer to the Air Cleaner Maintenance section in the Engine Manual. * A blocked fuel line: Contact your Sears Parts & Repair Center to have the fuel line cleaned.

Summary

SAFETY INSTRUCTIONS

General Operation Safety

Instructions for safe general operation of the lawn mower.

Slope Operation Safety

Safe practices for operating the mower on slopes.

Children and Service Safety

Safety guidelines for children, servicing, and fuel handling.

Engine and Emissions Safety

Safety regarding engine modification, emissions, and spark arrestor.

SLOPE GAUGE

Slope Gauge Instructions

Step-by-step instructions for using the slope gauge to determine safe operation.

ASSEMBLY

Unpacking and Handle Assembly

Steps for unpacking the mower and attaching the handle.

Rope Guide and Grass Catcher Attachment

Securing rope guide and attaching the grass catcher.

ADJUSTMENTS

Side Discharge Cover and Cutting Height Adjustment

Attaching side discharge cover and adjusting cutting height.

Drive Control Adjustment

Adjusting drive control cables for self-propel function.

OPERATION

Basic Controls and Starting

Operation of blade control, drive controls, recoil starter, and oil check.

Mowing Modes and Deck Wash

Using grass catcher, side discharge, mulch plugs, and deck wash.

Gas and Oil Fill-Up

Instructions for filling gas and oil before starting the mower.

Engine Starting and Stopping

Procedures for safely starting and stopping the engine.

Drive Control Modes

Using front wheel, rear wheel, and four-wheel drive modes.

Mulching and Grass Catcher Use

Guidelines for mulching and collecting grass clippings.

SERVICE AND MAINTENANCE

Maintenance Schedule and Recommendations

Overview of maintenance intervals, tasks, and general advice.

Lubrication

Lubrication points for controls and pivots.

ENGINE AND DECK CLEANING

Engine Maintenance

Instructions for cleaning the engine and its parts.

Deck Wash System

How to use the deck wash system for cleaning the deck underside.

BLADE AND BELT CARE

Blade Service and Balancing

Procedures for removing, sharpening, and balancing the blade.

Belt Care

Note on belt replacement for self-propulsion drive.

OFF-SEASON STORAGE

Engine and Mower Preparation for Storage

Steps to prepare the engine and mower for long-term storage.

Battery Storage

Guidelines for storing the battery during off-season.

TROUBLESHOOTING ENGINE ISSUES

Engine Starting and Running Problems

Common engine problems like not starting, running erratic, or overheating.

Idling and Hesitation Problems

Troubleshooting for poor idling and occasional skipping.

TROUBLESHOOTING MOWER ISSUES

Vibration, Uneven Cut, and Propel Issues

Diagnosing vibration, uneven cut, and self-propel problems.

EMISSION CONTROL SYSTEM WARRANTY

Owners Warranty Rights and Responsibilities

Explains owner's responsibilities for emission control warranty.

Warranty Coverage and Provisions

Details warranted parts, coverage length, and warranty terms.

Craftsman 247.379550 Specifications

General IconGeneral
Engine BrandBriggs & Stratton
Engine Displacement140cc
Starting SystemRecoil
Cutting Width21 inches
Cutting Height1.25 - 3.75 inches
Mulch CapableYes
Side DischargeYes
Rear BagYes
Wheel Size (Front)8 inches
Drive TypeSelf-propelled
Fuel Tank Capacity0.5 gallons
Speed SettingsVariable
Warranty2 years limited

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