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Craftsman 247.377300 - User Manual

Craftsman 247.377300
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Operator's Manual
CRRFT$1qFIN
21" LAWN MOWER
Model No. 247.377300
CAUTION: Before using this product,
read this manual and follow all safety
rules and operating instructions.
• SAFETY
• ASSEMBLY
• OPERATION
• MAINTENANCE
• ESPANOL
Sears Brands Management Corporation, Hoffman Estates, IL 60179, U.S.A.
Visit our website: www.craftsman.com FormNo.769-10443
(December3,2014)

Table of Contents

Questions and Answers

  • K
    Kimberly ReeseAug 14, 2025
    Why Craftsman 247.377300 engine fails to start?
    • M
      Michael MorenoAug 14, 2025
      If your Craftsman Lawn Mower engine won't start, there are several potential causes: * The blade control might be disengaged. Make sure to engage the blade control. * The spark plug boot could be disconnected. Connect the wire to the spark plug boot. * The fuel tank may be empty or contain stale fuel. Refill the tank with clean, fresh gasoline. * The engine might not be primed (if equipped with a primer). Prime the engine as instructed. * The spark plug could be faulty. Clean, adjust the gap, or replace the spark plug. * The engine may be flooded. Wait a few minutes before attempting to restart. * A blocked fuel line can also prevent starting. Contact a service center to have the fuel line cleaned.
  • M
    Mandy WigginsAug 18, 2025
    Why Craftsman 247.377300 has uneven cut?
    • D
      Dr. Jeremy Adams MDAug 18, 2025
      If your Craftsman Lawn Mower is producing an uneven cut: * Ensure that the wheels are positioned correctly. Adjust the cutting height lever on the right front and right rear wheel to the same position. * Check the blade. If the blade is dull, sharpen or replace it.
  • P
    Phillip ReynoldsAug 21, 2025
    What to do if Craftsman Lawn Mower engine runs erratic?
    • J
      Jade ParkerAug 21, 2025
      If your Craftsman Lawn Mower engine is running erratically, consider these potential causes: * A loose spark plug boot. Connect and tighten the spark plug boot. * Stale fuel. Replace the stale 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 from lack of fuel, then refill with fresh fuel. * A dirty air cleaner. Refer to the Air Cleaner section in the Engine Maintenance section. * A blocked fuel line. Contact a service center to have the fuel line cleaned.
  • S
    Scott FergusonAug 25, 2025
    Why Craftsman 247.377300 will not self propel?
    • J
      Jeffrey PaulAug 25, 2025
      If your Craftsman Lawn Mower is not self-propelling: * Check the belt for proper pulley installation and movement. * Stop the engine, disconnect the spark plug boot, and clean out any debris that may be clogging the drive operation. * Inspect the belt for damage or wear. If necessary, have the belt replaced.
  • C
    claytonsaraAug 28, 2025
    Why Craftsman Lawn Mower engine overheats?
    • B
      bscottAug 28, 2025
      If your Craftsman Lawn Mower engine is overheating: * Check the engine oil level and fill the crankcase with the proper oil if it's low. * Ensure that there is no restriction to the airflow around the engine. Clean the area around and on top of the engine.
  • E
    Emily DavisAug 31, 2025
    How to fix excessive vibration in Craftsman Lawn Mower?
    • R
      Robert MasseyAug 31, 2025
      If your Craftsman Lawn Mower is vibrating excessively: * Check if the cutting blade is loose or unbalanced. Tighten the blade and adapter, and balance the blade. * Inspect the cutting blade for any bending. If bent, replace the blade.
  • L
    Laura WilliamsSep 4, 2025
    What to do if Craftsman 247.377300 Lawn Mower will not mulch grass?
    • G
      guzmanzacharySep 4, 2025
      If your Craftsman Lawn Mower isn't mulching grass effectively: * Avoid mowing when the grass is wet; wait until it's dry. * If the grass is excessively high, mow once at a high cutting height, then mow again at the desired height, or make a narrower cutting path. * Check the blade. If the blade is dull, sharpen or replace it.
  • G
    Gary WashingtonSep 6, 2025
    Why Craftsman Lawn Mower idles poorly?
    • L
      landrygeorgeSep 7, 2025
      If your Craftsman Lawn Mower idles poorly, it could be due to: * 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 the Air Cleaner in Engine Maintenance section.
  • S
    Susan OlsenSep 10, 2025
    What causes occasional skips in Craftsman 247.377300?
    • V
      Victoria FreemanSep 10, 2025
      If your Craftsman Lawn Mower occasionally skips or hesitates, it might be due to the spark plug gap being too close. Adjust the gap according to the Spark Plug section in Engine Maintenance section.

Summary

Safety Instructions

Slope and Child Safety

Specific safety advice for operating on slopes and around children.

Engine and Emission Safety

Critical safety warnings for engine operation, modification, emissions, and spark arrestors.

Slope Gauge

Using the Slope Gauge

Instructions on how to use the slope gauge to determine safe mowing slopes.

Assembly

Attaching The Handle

Steps for attaching and securing the mower's handle assembly.

Cutting Height Adjustment

Operation

Blade Control

Explanation of the blade control lever and its safety function.

Drive Controls

Operation of drive controls, including premium drive and recoil starter.

Gas and Oil Fill-Up

Critical steps for adding gasoline and oil to the mower's engine.

Gasoline and Fueling

Important information, requirements, and safety precautions regarding gasoline use and refueling.

Starting and Stopping the Engine

Step-by-step guide on how to start and safely stop the lawn mower engine.

Using Your Lawn Mower

General instructions for operating the lawn mower, including propulsion and safety.

Service and Maintenance

Maintenance Schedule

A schedule of recommended maintenance tasks and their intervals.

Engine Maintenance

Key maintenance tasks related to the engine components.

Spark Plug Service

Procedure for checking, cleaning, gapping, and replacing the spark plug.

Air Filter Service

Engine Oil Service

Change Engine Oil

Step-by-step guide for changing the engine oil, including safety precautions.

Fuel Filter Replacement

Blade Care and Service

Instructions for inspecting, balancing, sharpening, and replacing the mower blade.

Drive Adjustment

Troubleshooting

Engine Fails to Start

Engine Runs Erratic

Engine Overheats

Occasional Skips or Hesitation

Poor Engine Idle

Excessive Vibration

Mower Not Mulching Grass

Uneven Cut

Mower Will Not Self Propel

Craftsman 247.377300 Specifications

General IconGeneral
BrandCraftsman
Model247.377300
CategoryLawn Mower
LanguageEnglish

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