Craftsman 247.377450 - User Manual

Craftsman 247.377450

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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. 247.377450

Form No. 769-11965

(October 31, 2016)

Questions and Answers

M
Melissa StanleyAug 14, 2025
Why won't my Craftsman 247.377450 Lawn Mower engine start?
- C
  Christopher NicholsSep 12, 2025
  There are several reasons why your Craftsman Lawn Mower engine might fail to start: * The blade control may be disengaged: ensure the blade control is engaged. * The spark plug boot may be disconnected: connect the wire to the spark plug boot. * The fuel tank may be empty or contain stale fuel: fill the tank with clean, fresh gasoline. * The engine may not be primed (if equipped with a primer): prime the engine as instructed in the Operation section. * The spark plug may be faulty: clean, adjust the gap, or replace the spark plug. * The engine may be flooded: wait a few minutes before attempting to restart it.
S
Stephen SantiagoAug 17, 2025
Why does my Craftsman Lawn Mower provide an uneven cut?
- J
  Joshua JacksonAug 17, 2025
  An uneven cut with your Craftsman Lawn Mower may 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.
G
gilbertjessicaAug 21, 2025
What to do if my Craftsman Lawn Mower will not self propel?
- M
  maxwelloliverAug 21, 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 clogging the drive operation.
S
Sarah RossAug 25, 2025
Why does my Craftsman 247.377450 Lawn Mower idle poorly?
- D
  David WoodsAug 25, 2025
  Poor idling in your Craftsman Lawn Mower can be caused by: * A spark plug that is fouled, faulty, or has a gap that is too wide: reset the gap or replace the spark plug.
T
Todd McguireAug 27, 2025
What to do if my Craftsman 247.377450 engine runs erratically?
- A
  Angela AndersonAug 27, 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.
T
Thomas MillerAug 30, 2025
Why is my Craftsman Lawn Mower vibrating excessively?
- M
  michael98Aug 30, 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.
L
lfloresSep 3, 2025
What to do if my Craftsman 247.377450 Lawn Mower engine overheats?
- T
  Tiffany OliverSep 3, 2025
  If your Craftsman Lawn Mower engine is overheating: * Check if the engine oil level is low and fill the crankcase with the proper oil if needed. * Ensure that the air flow is not restricted, clean the area around and on top of the engine.
B
Brett GutierrezSep 6, 2025
Why won't my Craftsman 247.377450 Lawn Mower mulch grass properly?
- K
  Kayla GlennSep 6, 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 if the blade is dull and sharpen or replace it.
T
Timothy RobertsSep 9, 2025
What causes occasional skips (hesitates) in Craftsman 247.377450 Lawn Mower?
- R
  Richard MckinneySep 10, 2025
  Occasional skipping or hesitation in your Craftsman Lawn Mower can occur if the spark plug gap is too close. Adjust the gap according to the Engine Manual.

Craftsman 247.377450 Specifications

General

Brand	Craftsman
Model	247.377450
Category	Lawn Mower
Language	English

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