{"product_id":"c52-feed-trimmer-head-1","title":"C5-2 Feed Trimmer Head - Fits Stihl FS38, FS40, FS45, FS46 - Replaces 4006-710-2106, 4006-710-2103","description":"\u003ch2\u003eAutoCut C5-2 Trimmer Head for Stihl Curved Shaft Trimmers\u003c\/h2\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutoCut \"C\" Series Easy-Loading:\u003c\/strong\u003e Features a specialized internal spool that allows for reloading trimmer line without disassembling the head; simply insert the line and twist the knob to wind.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Line Bump Feed:\u003c\/strong\u003e Engineered for reliable line advancement with a single tap on the ground during full-throttle operation, maintaining a consistent cutting swath.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Impact Polymer Construction:\u003c\/strong\u003e Manufactured from glass-reinforced nylon to withstand high-velocity contact with rocks, curbs, and fence posts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-Profile Aerodynamic Design:\u003c\/strong\u003e Designed to reduce air resistance and engine drag, allowing small-displacement trimmers to maintain higher RPMs for cleaner cuts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision-Balanced Spool:\u003c\/strong\u003e Reduced vibration during high-speed rotation, which protects the trimmer's flexible drive shaft and reduces operator hand fatigue.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eReplaces \/ Cross-Reference Part Numbers\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e4006 710 2106\u003c\/li\u003e\n\u003cli\u003e4006 710 2103\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAutoCut C5-2\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatibility \u0026amp; Fitment\u003c\/h3\u003e\n\u003cp\u003eThis trimmer head is specifically designed for Stihl's lightweight \u003cstrong\u003ecurved-shaft\u003c\/strong\u003e trimmers and electric models. Key compatible models include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStihl Gas Trimmers:\u003c\/strong\u003e FS 38, FS 40, FS 45, FS 45 C, FS 46, FS 50, FS 50 C.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStihl Electric Trimmers:\u003c\/strong\u003e FSE 60, FSE 71, FSE 81.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStihl KombiSystems:\u003c\/strong\u003e FS-KM (Curved shaft attachment).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e Not compatible with straight-shaft Stihl trimmers (FS 55, FS 56, etc.) which typically utilize the larger C26-2 head with different arbor threads.\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 Cap:\u003c\/strong\u003e The bottom of the head is ground down to the point where the internal spring is visible or the line release no longer functions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCracked Housing:\u003c\/strong\u003e Visible stress fractures in the black outer shell, which can lead to the head shattering at high RPM.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine Won't Load:\u003c\/strong\u003e The internal \"eyelets\" no longer line up or the winding mechanism is jammed with dried sap and debris.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEyelet Failure:\u003c\/strong\u003e The metal line exits have fallen out or are deeply grooved, causing the trimmer line to snap off inside the head repeatedly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExcessive Vibration:\u003c\/strong\u003e The head has become unbalanced due to uneven wear, putting unnecessary stress on the trimmer's motor and drive cable.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Tips\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLeft-Hand Threads:\u003c\/strong\u003e Remember, this head is \u003cstrong\u003eLeft-Hand Threaded\u003c\/strong\u003e. To tighten it onto the trimmer, you must turn it \u003cstrong\u003eCounter-Clockwise\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy-Load Alignment:\u003c\/strong\u003e To reload, rotate the top knob until the arrows on the knob align with the metal eyelets. Push about 10–13 feet of 0.080\" line through until it is even on both sides, then twist the knob to wind it in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine Diameter:\u003c\/strong\u003e For best results on FS 38\/45 models, use \u003cstrong\u003e0.080\" (2.0mm)\u003c\/strong\u003e line. While 0.095\" may fit, it can cause the small engine to bog down and overheat the clutch.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClean the Head:\u003c\/strong\u003e Every time you reload the line, tap out any accumulated grass and dirt from inside the head to ensure the \"bump\" action stays smooth.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive Cable Care:\u003c\/strong\u003e While the head is removed, check the end of your drive cable. If it looks dry, apply a small amount of \u003cstrong\u003eStihl Multilub\u003c\/strong\u003e to prevent the cable from snapping inside the shaft.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BlueStarsParts","offers":[{"title":"Default Title","offer_id":45860029726909,"sku":"AZ00814074","price":15.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2576\/7548\/files\/AZ00228522_1_c85cbecb-6bc0-4e92-be35-888363d60914.jpg?v=1762245599","url":"https:\/\/bluestarspartstrend.com\/products\/c52-feed-trimmer-head-1","provider":"BlueStars Parts","version":"1.0","type":"link"}