{"product_id":"99944200903-speedfeed-450-trimmer-head-2pack","title":"99944200903 Speed-Feed 450 Trimmer Head - Fits Echo SRM-266, SRM-266S, SRM-266T, SRM-266U - 2 Pack Ver. 1","description":"\u003ch2\u003e99944200903 Speed-Feed 450 Trimmer Head\u003c\/h2\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e30-Second Reload:\u003c\/strong\u003e Engineered with \"Speed-Feed\" technology that allows the spool to be reloaded without disassembly. Simply align the arrows, feed the line through, and twist the knob.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Capacity Spool:\u003c\/strong\u003e Designed for professional use, holding more line than standard manual heads to reduce downtime on large properties.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-Duty Bump Feed:\u003c\/strong\u003e Features a reinforced, high-impact bump knob and specialized eyelets to withstand high-RPM contact with concrete and fencing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal Compatibility:\u003c\/strong\u003e Includes a set of adapter bushings and studs to fit a wide variety of straight-shaft and curved-shaft trimmers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Balance:\u003c\/strong\u003e Manufactured to strict tolerances to reduce vibration, extending the life of the trimmer's gear head and reducing operator fatigue.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eReplaces \/ Cross-Reference Part Numbers\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cmeta charset=\"utf-8\"\u003e99944200903\u003c\/li\u003e\n\u003cli\u003eX047000940\u003c\/li\u003e\n\u003cli\u003e28820-08000\u003c\/li\u003e\n\u003cli\u003e78890-21001\u003c\/li\u003e\n\u003cli\u003e385-288\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatibility \u0026amp; Fitment\u003c\/h3\u003e\n\u003cp\u003eThis trimmer head is a standard upgrade for Echo and Shindaiwa professional units. Key compatible models include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEcho SRM Series:\u003c\/strong\u003e SRM-266, SRM-266S, SRM-266T, SRM-266U, SRM-280, SRM-280S, SRM-280T.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEcho High-Torque:\u003c\/strong\u003e SRM-2620, SRM-2620T, SRM-3020, SRM-3020T.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShindaiwa:\u003c\/strong\u003e T230, T231, T242, T2510, T260, T261, T270, T272, T282, T344.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOther Brands:\u003c\/strong\u003e Fits select Stihl, Husqvarna, Maruyama, and RedMax straight-shaft trimmers using the included adapter kit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhen to Replace\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorn-Through Bump Knob:\u003c\/strong\u003e The plastic on the bottom knob has worn down to the spring or internal metal, preventing the line from advancing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrooved Eyelets:\u003c\/strong\u003e The metal eyelets (where the line exits) have developed deep notches, causing the trimmer line to break off inside the head.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStuck Mechanism:\u003c\/strong\u003e The internal ratcheting gear is stripped or melted due to line friction, making it impossible to reload.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExcessive Vibration:\u003c\/strong\u003e The head is physically cracked or missing a piece, creating an imbalance that can damage the trimmer's driveshaft.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation \u0026amp; Loading Tips\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLeft-Hand Threads:\u003c\/strong\u003e Most straight-shaft trimmers (like the SRM-266) use a counter-clockwise tightening direction. Spin the old head clockwise to remove it.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlign the Arrows:\u003c\/strong\u003e To load, rotate the top knob until the arrows on the side of the knob line up with the eyelets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe 10-Foot Rule:\u003c\/strong\u003e Insert approximately 10–12 feet of .095\" line through one eyelet and out the other. Pull it through until the lengths are even on both sides.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWinding:\u003c\/strong\u003e Hold the trimmer head and twist the bottom disc (or knob) to pull the line into the spool. Do not wind it manually by opening the head unless there is a tangle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended Line:\u003c\/strong\u003e For best results on Echo 266\/280 models, use \u003cstrong\u003e.095\" or .105\" professional round or square line\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BlueStarsParts","offers":[{"title":"Default Title","offer_id":46497320566973,"sku":"AZ00116005","price":26.91,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2576\/7548\/files\/AZ00231635_1.jpg?v=1757320711","url":"https:\/\/bluestarspartstrend.com\/products\/99944200903-speedfeed-450-trimmer-head-2pack","provider":"BlueStars Parts","version":"1.0","type":"link"}