Echo 99944200907b New Genuine Speed Feed 400 Head fits All SRM Trimmers

What It Is

The Echo 99944200907b Speed Feed 400 is a bump-feed trimmer head designed for Echo SRM-series straight-shaft trimmers. It loads line without disassembly—just push the line through the eyelets and wind—making it ideal for residential and light commercial trimming.

Fitment & Compatibility

• Exact fit: Echo SRM-210, SRM-225, SRM-230, SRM-260, SRM-2620, SRM-266, SRM-310, SRM-320, SRM-330, SRM-350, SRM-400, and all other SRM models with a 10mm (0.394”) shaft diameter.
• Not compatible with curved-shaft trimmers or older Echo models using a different shaft size (e.g., 8mm/0.315”). Measure your shaft diameter before buying.
• OEM part—no aftermarket adapters needed for listed models. If you have a non-Echo brand, this head may fit with a universal adapter (sold separately), but check shaft diameter and drive hole pattern.
• Line capacity: Accepts up to 0.095” (2.4mm) diameter trimmer line; holds ~20 feet. Do not use thicker line—it will jam or break the head.

Key Things to Know

• Installation: Tool-free; remove old head, screw this one on clockwise (reverse thread on some models—verify your spindle direction). Takes 30 seconds.
• Loading line: No disassembly required. Push line into one eyelet, wind by hand, repeat for second eyelet. Bump the head on the ground to advance.
• Durability: Plastic housing holds up well for homeowner use but can crack if you hit curbs or rocks repeatedly. Not meant for heavy commercial daily abuse.
• Common gotcha: The internal spring can pop out during line replacement if you force the spool. Keep the spring seated fully before winding.

Should You Buy It

If you own an Echo SRM straight-shaft trimmer and want fast, hassle-free line reloading without tools, this is the right OEM upgrade. It’s a no-brainer for homeowners and light-duty users; pros may want a metal head for extreme abuse.