Craftsman 247.377440 User Manual

Craftsman 247.377440

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Sears Brands Management Corporation, Hoffman Estates, IL 60179, U.S.A.

Visit our website: www.craftsman.com

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

21” LAWN MOWER

Model No. 247.377440

Form N o. 769 -11191

(December 10, 2015)

Table of Contents

Questions and Answers:

P
patrickdawsonAug 21, 2025
Why won't my Craftsman 247.377440 engine start?
- E
  erin40Aug 21, 2025
  If your Craftsman Lawn Mower engine won't start, several factors could be at play. First, ensure the blade control is engaged. Next, check that the spark plug boot is securely connected. Also, verify that the fuel tank isn't empty and that you're using fresh gasoline. If your mower has a primer, make sure you've primed the engine correctly. A faulty spark plug could also be the culprit, so inspect, clean, adjust the gap, or replace it if needed. If the engine is flooded, wait a few minutes before attempting to restart. Finally, a blocked fuel line could be the issue; in this case, contact your Sears Parts & Repair Center to have the fuel line cleaned.
Z
zortizAug 23, 2025
Why Craftsman 247.377440 Lawn Mower engine fails to start?
- D
  David EstesAug 23, 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.
B
Brent PhillipsAug 25, 2025
What causes uneven cut with Craftsman 247.377440 Lawn Mower?
- A
  allisonmontgomeryAug 25, 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.
R
robertcochranAug 27, 2025
Why is my Craftsman Lawn Mower vibrating so much?
- S
  Sheila PearsonAug 27, 2025
  If your Craftsman Lawn Mower is vibrating excessively, it could be due to a loose or unbalanced cutting blade. Make sure to tighten the blade and adapter and balance the blade. Another possibility is a bent cutting blade, which would require a replacement.
K
Kimberly NguyenAug 28, 2025
Why does my Craftsman 247.377440 Lawn Mower engine run erratically?
- M
  Ms. Carolyn PaulAug 28, 2025
  If your Craftsman Lawn Mower engine is running erratically, start by checking the spark plug boot to ensure it's connected and tight. Stale fuel can also cause this issue, so refill the tank with clean, fresh gasoline. Make sure the vent in the gas cap isn't plugged, and if there's water or dirt in the fuel system, run the engine until it stops from lack of fuel, then refill with fresh fuel. For a dirty air cleaner, refer to the Air Cleaner Maintenance in the Engine Manual. Finally, a blocked fuel line could be the problem; in this case, contact your Sears Parts & Repair Center to have the fuel line cleaned.
A
Adriana JohnsonAug 29, 2025
Why does my Craftsman 247.377440 Lawn Mower leave an uneven cut?
- V
  velasquezcrystalAug 29, 2025
  If your Craftsman Lawn Mower provides an uneven cut, ensure that the wheels are positioned correctly by adjusting the cutting height lever on the right front and right rear wheels to the same position. Also, check the blade; a dull blade can cause an uneven cut, so sharpen or replace it.
N
Nathan DukeAug 31, 2025
Why won't my Craftsman 247.377440 self-propel?
- M
  Mr. Daniel RodriguezAug 31, 2025
  If your Craftsman Lawn Mower won't self-propel, first check the belt for proper pulley installation and movement. Debris clogging the drive operation can also be a factor; stop the engine, disconnect the spark plug boot, and clean out any debris. Inspect the belt for damage or wear; if necessary, see your Sears Parts & Repair Center to have the belt replaced. If the drive control is out of adjustment, refer to page 11 in the Assembly & Set-up section to adjust it.
T
thompsontracySep 2, 2025
What to do if Craftsman Lawn Mower engine runs erratic?
- A
  annaramosSep 2, 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.
B
Bryan RiversSep 3, 2025
What to do if Craftsman 247.377440 will not self propel?
- T
  Troy BuckleySep 3, 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.
J
Janet MillerSep 5, 2025
Why Craftsman 247.377440 idles poorly?
- U
  underwoodrichardSep 5, 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.

Craftsman 247.377440 Specifications

General

Brand	Craftsman
Model	247.377440
Category	Lawn Mower
Language	English

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