HomeStore

[Lifetime Warranty] 99944200903 Speed-Feed 450 Trimmer Head - Compatible with Echo SRM-266, SRM-266S, SRM-266T, SRM-266U, SRM-280, SRM-280S, SRM-280T - Replaces X047000940

Product image 1
Product image 2
Product image 3
Product image 4
Product image 5
Product image 6
Product image 7
Product image 8
Product image 9

[Lifetime Warranty] 99944200903 Speed-Feed 450 Trimmer Head - Compatible with Echo SRM-266, SRM-266S, SRM-266T, SRM-266U, SRM-280, SRM-280S, SRM-280T - Replaces X047000940

[Lifetime Warranty] 99944200903 Speed-Feed 450 Trimmer Head - Compatible with Echo SRM-266, SRM-266S, SRM-266T, SRM-266U, SRM-280, SRM-280S, SRM-280T - Replaces X047000940

99944200903 Speed-Feed 450 Trimmer Head

Key Features

  • Features a rapid-loading system for trimmer line refills.
  • Bump-feed mechanism advances line with a simple tap on the ground.
  • Holds up to 20 ft. of 0.095 in. diameter trimmer line.
  • Constructed with a durable, high-impact housing.

Replaces / Cross-Reference Part Numbers

  • Direct OEM replacement for part number 99944200903.

Compatibility & Fitment

  • Fits various ECHO straight-shaft grass trimmers and brushcutters.
  • Commonly used on models such as the ECHO SRM266.
  • Requires a 10 mm x 1.25 mm left-hand (LH) threaded arbor for installation.

When to Replace

  • The outer housing is cracked, broken, or excessively worn.
  • The bump knob fails to advance the trimmer line upon tapping.
  • Internal components are worn and can no longer grip or feed the line properly.
  • Line eyelets are damaged, causing the line to fray or break frequently.

Installation Tips

  • Disconnect the spark plug before beginning installation for safety.
  • Lock the gearbox to prevent the head from rotating during removal.
  • Unscrew the old head by turning it clockwise (it is reverse-threaded).
  • Secure the new head by threading it on counter-clockwise until snug.
$5.49

Original: $15.70

-65%
[Lifetime Warranty] 99944200903 Speed-Feed 450 Trimmer Head - Compatible with Echo SRM-266, SRM-266S, SRM-266T, SRM-266U, SRM-280, SRM-280S, SRM-280T - Replaces X047000940—

$15.70

$5.49

Product Information

Shipping & Returns

Description

99944200903 Speed-Feed 450 Trimmer Head

Key Features

  • Features a rapid-loading system for trimmer line refills.
  • Bump-feed mechanism advances line with a simple tap on the ground.
  • Holds up to 20 ft. of 0.095 in. diameter trimmer line.
  • Constructed with a durable, high-impact housing.

Replaces / Cross-Reference Part Numbers

  • Direct OEM replacement for part number 99944200903.

Compatibility & Fitment

  • Fits various ECHO straight-shaft grass trimmers and brushcutters.
  • Commonly used on models such as the ECHO SRM266.
  • Requires a 10 mm x 1.25 mm left-hand (LH) threaded arbor for installation.

When to Replace

  • The outer housing is cracked, broken, or excessively worn.
  • The bump knob fails to advance the trimmer line upon tapping.
  • Internal components are worn and can no longer grip or feed the line properly.
  • Line eyelets are damaged, causing the line to fray or break frequently.

Installation Tips

  • Disconnect the spark plug before beginning installation for safety.
  • Lock the gearbox to prevent the head from rotating during removal.
  • Unscrew the old head by turning it clockwise (it is reverse-threaded).
  • Secure the new head by threading it on counter-clockwise until snug.
[Lifetime Warranty] 99944200903 Speed-Feed 450 Trimmer Head - Compatible with Echo SRM-266, SRM-266S, SRM-266T, SRM-266U, SRM-280, SRM-280S, SRM-280T - Replaces X047000940 | BlueStars Quality Replacement Parts