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

R
Roy WardSep 10, 2025
What to do if my Craftsman 247.377440 Lawn Mower electric starter fails?
- M
  Monica BenderSep 10, 2025
  If your Craftsman Lawn Mower with electric starter fails to start, make sure the Electric Starter Push Key is fully inserted into the starter housing until it snaps into place. If that's not the issue, the battery may not be charged, so charge it. Lastly, a tripped circuit breaker could be the cause. Debris may be blocking blade operation. Stop the engine, remove the Electric Starter Push Key, and disconnect the spark plug boot. Verify grass or other debris is not obstructing the blade. Carefully clean out debris if necessary. Reattach the spark plug boot and reinsert the Electric Starter Push Key. Wait one minute after tripping for the circuit breaker to automatically self-reset, then reattempt start.
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.
S
scott99Sep 18, 2025
Why is there high pullback effort on Craftsman 247.377440 Lawn Mower?
- J
  Jennifer HarveySep 18, 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
rubiojoannaSep 12, 2025
Why does my Craftsman 247.377440 Lawn Mower idle poorly?
- E
  ericthomasSep 12, 2025
  If your Craftsman Lawn Mower idles poorly, the spark plug may be fouled, faulty, or have a gap that's too wide. Reset the gap or replace the spark plug. A dirty air cleaner can also cause this issue; refer to Air Cleaner Maintenance in the Engine Manual.
C
Connor AdamsSep 8, 2025
Why is my Craftsman Lawn Mower engine overheating?
- E
  Erik WilsonSep 8, 2025
  If your Craftsman Lawn Mower engine overheats, check the engine oil level and fill the crankcase with the proper oil if it's low. Also, ensure that the airflow around the engine isn't restricted by cleaning the area around and on top of the engine.
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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