DMKJIDP Speed Feed 400 Replacement Trimmer Head — 2-Pack for Echo SRM Series, Preloaded .105" Line, Tool-Free Feed

DMKJIDP Speed Feed 400 replacement trimmer head is a two-pack direct swap for many Echo, Shindaiwa and compatible straight-shaft trimmers, delivering easy tool-free line feeding and durable impact-resistant construction.

If your current trimmer head is worn, cracked, or the bump-feed mechanism no longer works, this DMKJIDP replacement set restores fast reloading and reliable cutting performance. Each head ships preloaded with approximately 13 ft of .105" line, and the universal design fits a wide range of Echo SRM-series and many Stihl and Shindaiwa models when used on straight-shaft machines with M10×1.25 threads.

Which trimmers will this replacement head work with?

This 400 Speed Feed-style head is built to replace Echo part numbers 99944200907 and 99944200902 and fits many Echo SRM and PAS series straight-shaft models. It’s also compatible with a long list of Stihl speed feed models and numerous Shindaiwa straight-shaft heads—note it is not for curved-shaft GT-series trimmers.

• Compatible Echo models: SRM-140, SRM-200, SRM-210, SRM-225, SRM-225I, SRM-230, SRM-250, SRM-261, SRM-280, SRM-340 and more.
• Replaces Echo part numbers: 99944200907, 99944200902, 78890-30000 series.
• Also fits Stihl speed feed series FS44–FS550 and many Shindaiwa straight-shaft models (not GT curved shafts).
• Check shaft thread: requires M10×1.25 (not M10×1.0); no adapters included.

How do I load and feed the trimmer line?

The head comes preloaded with about 13 ft of .105" line and uses the Speed Feed bump system so you can advance line without disassembly. If you need to replace the line, the face cover snaps off for easy manual threading—no special tools required.

• Preinstalled: ~13 ft of .105" line; also accepts .080", .095", .120" diameters.
• Tool-free reloading: open cover by hand, wind line into the spool, snap back on.
• Bump-feed operation: simply tap head on the ground to advance line.
• Designed to avoid tangled lines and speed up reloads on the job.

What is the build quality and durability like?

The housing is molded from high-impact plastic designed to resist cracking when it contacts curbs, rocks, or compacted soil during routine trimming. The construction aims to withstand daily backyard or professional use without deforming, offering a balance of light weight and toughness.

• High-quality plastic housing resists cracks and breaks from impacts.
• Sturdy bump-feed components for consistent line advance under load.
• Preloaded line reduces early wear from improper installation.
• Two-head pack gives a spare for quick replacement in the field.

Who is this for: This DMKJIDP 2-pack trimmer head is suited for homeowners and landscaping pros who own straight-shaft Echo, compatible Stihl speed feed, or Shindaiwa trimmers and need a cost-effective, durable replacement that restores fast bump-feed line changes. Confirm your trimmer’s shaft thread is M10×1.25 and that you use a straight (not curved) shaft before ordering to ensure a seamless fit.