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The ECHO 99944200221 is a genuine OEM 3-line rapid-load trimmer head designed for ECHO and Shindaiwa string trimmers. It replaces the standard single- or dual-line head with a 3-line configuration, increasing cutting coverage per rotation and reducing the number of passes needed to clear heavy grass and brush. The rapid-load design allows line replacement without disassembling the head - spent line is removed and new pre-cut segments are inserted directly into the eyelets. Weighing 0.48 pounds, it is a direct OEM fitment intended for installation by landscape professionals and experienced equipment technicians.
This trimmer head is suited for commercial and residential string trimmer applications where faster line replacement and higher cutting output are priorities. It is compatible with ECHO SRM2620, SRM266, and SRM280 string trimmer models as noted in the product data. The 3-line configuration is particularly useful in high-volume landscape maintenance work where downtime for line replacement needs to be minimized.
Compatible with ECHO SRM2620, SRM266, and SRM280 string trimmers as stated in product documentation.
Installation is performed by landscape equipment technicians or qualified power equipment service professionals. Disconnect the spark plug wire before removing the existing trimmer head to prevent accidental engine start. Secure the crankshaft using the manufacturer-recommended method before applying force to remove or install the head, as improper technique can damage the crankshaft threads. Consult the trimmer service manual for head thread direction, as some models use left-hand threads.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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