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Craftsman 247.37787 Series - User Manual

Craftsman 247.37787 Series
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Sears Brands Management Corporation, Hoffman Estates, IL 60179, U.S.A.
Visit our website: www.craftsman.comUsed under license
To order parts or schedule service for this
product, call:
1-888-331-4569
Customer Care Hot Line
Before using this equipment, read the
manual and follow all safety rules and
operating instructions.
© Sears Brands, LLC
Form No. 769-12930
(November 17, 2017)
21” LAWN MOWER
Model Nos. 247.39767*
* -- Last digit of model number varies
Operator’s Manual
21” LAWN MOWER
Model Nos. 247.37787*
247.37705*
247.37747*
247.374 41*
247.37744*
* -- Last digit of model number varies
CAUTION
TABLE OF CONTENTS
Safety Instructions ............................Pages 2-5
Slope Guide .....................................Page 6
Unpacking .......................................Page 7
Assembly .....................................Pages 7-9
Adjustments .........................................10
Operation ..................................Pages 11-13
Service and Maintenance ....................Pages 14-17
Off-Season Storage ..............................Page 18
Troubleshooting ............................ Page 19-20
Español ........................................ Page 22

Table of Contents

Questions and Answers

  • C
    Christine FosterAug 16, 2025
    Why Craftsman 247.37787 engine fails to start?
    • M
      Michele MartinezAug 16, 2025
      The Craftsman Lawn Mower engine may fail to start due to several reasons: - The blade control might be disengaged, so ensure it is engaged. - The spark plug boot could be disconnected; check and connect it. - The fuel tank may be empty or contain stale fuel; refill with fresh gasoline. - The engine may not be primed; prime it as instructed in the Operation section. - The spark plug might be faulty; clean, adjust the gap, or replace it. - The engine could be flooded; wait a few minutes before restarting.
  • S
    Stephanie WatkinsAug 18, 2025
    What to do if Craftsman Lawn Mower engine fails to start with electric starter?
    • T
      Tracy RiceAug 19, 2025
      If your Craftsman Lawn Mower engine fails to start with the electric starter, consider the following: - Ensure the Electric Starter Push Key is fully inserted into the starter housing until it snaps into place. - The battery may not be charged. Charge the battery. - The circuit breaker might have tripped. Stop the engine, remove the Electric Starter Push Key, and disconnect the spark plug boot. Check for and carefully remove any debris obstructing the blade. Reattach the spark plug boot and reinsert the Electric Starter Push Key. Wait one minute for the circuit breaker to automatically reset, then try starting again.
  • M
    Michele RosarioAug 22, 2025
    What to do if Craftsman 247.37787 engine runs erratic?
    • T
      Terry YatesAug 22, 2025
      If your Craftsman Lawn Mower engine runs erratically, it could be due to: - A loose spark plug boot. Connect and tighten the spark plug boot. - Stale fuel. Replace the 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.
  • R
    Renee ClarkAug 25, 2025
    Why Craftsman 247.37787 has uneven cut?
    • A
      austin14Aug 25, 2025
      An uneven cut with your Craftsman Lawn Mower can result from: - Wheels not positioned correctly. Adjust the cutting height lever on the right front and right rear wheel to the same position. - A dull blade. Sharpen or replace the blade.
  • L
    Leah OsborneAug 27, 2025
    What to do if Craftsman 247.37787 Lawn Mower idles poorly?
    • D
      Deanna BernardAug 28, 2025
      If your Craftsman Lawn Mower idles poorly, it might be because: - The spark plug is fouled, faulty, or the gap is too wide. Reset the gap or replace the spark plug. - The air cleaner is dirty. Refer to the Air Cleaner Maintenance section in the Engine Manual.
  • R
    Rodney GoodmanAug 31, 2025
    Why Craftsman Lawn Mower will not self propel?
    • G
      George JacksonAug 31, 2025
      Your Craftsman Lawn Mower might not self-propel due to: - The belt not installed properly. Check the belt for proper pulley installation and movement. - Debris clogging the drive operation. Stop the engine, disconnect the spark plug boot, and clean out any debris. - A damaged or worn belt. Inspect the belt.
  • S
    stephanieramirezSep 3, 2025
    Why Craftsman 247.37787 Lawn Mower engine overheats?
    • S
      Sharon HubbardSep 3, 2025
      The Craftsman Lawn Mower engine may overheat if: - The engine oil level is low. Fill the crankcase with the proper oil. - The airflow is restricted. Clean the area around and on top of the engine.
  • K
    kristin76Sep 5, 2025
    Why Craftsman 247.37787 will not mulch grass?
    • A
      Autumn BakerSep 6, 2025
      Your Craftsman Lawn Mower might not mulch grass effectively due to: - Wet grass. Avoid mowing when the grass is wet; wait until it's dry. - Excessively high grass. Mow once at a high cutting height, then mow again at the desired height or make a narrower cutting path. - A dull blade. Sharpen or replace the blade.
  • H
    Hannah KochSep 8, 2025
    Why Craftsman 247.37787 Lawn Mower has excessive vibration?
    • T
      Tracy Knapp MDSep 8, 2025
      Excessive vibration in your Craftsman Lawn Mower could be due to: - A loose or unbalanced cutting blade. Tighten the blade and adapter, and balance the blade. - A bent cutting blade. Replace the blade.
  • Y
    ymaldonadoSep 12, 2025
    Why Craftsman 247.37787 Lawn Mower occasionally skips?
    • J
      Jerry DavidSep 12, 2025
      Occasional skipping or hesitation in your Craftsman Lawn Mower may be due to: - The spark plug gap being too close. Adjust the gap, referring to the Spark Plug Maintenance section in the Engine Manual.

Summary

Safety Instructions

General Operation

Read and follow all instructions before operating. Ensure familiarity with controls and proper use.

Slope Operation

Operate on slopes with caution. Avoid steep slopes and turning downhill. Maintain control at all times.

Children

Do Not Modify Engine

Never modify engine governor settings. Tampering can lead to unsafe speeds and serious injury or death.

Assembly

Attaching The Handle

Adjustments

Cutting Height

Adjust the cutting height lever on each wheel to set the desired grass length. Ensure all wheels match.

Drive Control (If Equipped)

Operation

Blade Control

The blade control stops the engine and blade when released. Never bypass this essential safety device.

Drive Control - Bail or Single Lever (If Equipped)

Use the drive control lever to engage, slow down, or stop the mower's self-propelling function.

Drive Control - Dual Lever (If Equipped)

Engage drive by squeezing controls against the handle; release to slow or stop mower propulsion.

Cutting Height Adjustment Lever

Adjust levers on rear and front wheels to ensure a uniform cut height for an even lawn appearance.

Recoil Starter

Pull the recoil starter rope firmly to start the engine. Stand behind the unit when starting.

Oil Fill Cap;Dipstick

Electric Starter Push Key (If Equipped)

Gas and Oil Fill-Up

Service engine with gasoline and oil as instructed before starting. Handle fuel with extreme care due to flammability.

To Start Engine

Ensure area is clear. Grip starter cord firmly. Pull to start. Never run engine indoors or in poorly ventilated areas.

Service and Maintenance

Maintenance Schedule

Follow the provided schedule for regular service intervals to ensure optimal mower performance and longevity.

Lubrication

Engine Maintenance

Clean engine daily or before use. Keep linkages clean and remove debris to prevent overheating and ignition.

Blade Care

Craftsman 247.37787 Series Specifications

General IconGeneral
Deck MaterialSteel
Weight80 lbs
Mulching CapabilityYes
EngineBriggs & Stratton
Cutting Width21 inches
Start TypeRecoil
Drive TypeSelf-propelled
Cutting Height1.25 - 3.75 in.
Discharge OptionsSide, Rear, Mulch
Warranty2-year limited

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