{"product_id":"trimmer-head-spool-cap-cover-6pack","title":"40027133017 Trimmer Head Spool Cap Cover - Fits Stihl Autocut 25-2 (FS90R, FS44, FS56, FS90 - 6 Pack","description":"\u003ch2\u003e40027133017 Trimmer Head Spool Cap Cover\u003c\/h2\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Durability Impact Polymer:\u003c\/strong\u003e Manufactured from specialized, glass-reinforced nylon designed to withstand high-velocity contact with rocks, curbs, and hard soil without cracking.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Tab Locking System:\u003c\/strong\u003e Features a precision-molded snap-fit design that ensures the cap remains securely locked to the trimmer head even under high centrifugal force and heavy vibration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Ground-Slide Surface:\u003c\/strong\u003e The bottom profile is engineered for smooth \"bumping\" on the ground to advance line, reducing friction and extending the life of the internal spool components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal Spring Support:\u003c\/strong\u003e Designed with a centered recess to perfectly seat the AutoCut 25-2 internal spring, ensuring consistent tension and a reliable \"snap-back\" during line advancement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeat-Resistant Engineering:\u003c\/strong\u003e Formulated to resist warping and melting caused by the friction heat generated during intensive, commercial-grade trimming and edging.\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\"\u003e \u003cstrong\u003eStilh:\u003c\/strong\u003e 40027133017\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStens:\u003c\/strong\u003e 385-563, 385-861\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatibility \u0026amp; Fitment\u003c\/h3\u003e\n\u003cp\u003eThis spool cap is the standard replacement for the Stihl AutoCut 25-2 trimmer head, which is found on a wide variety of professional and residential trimmers. Key compatible models include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStihl FS Series (Small\/Medium):\u003c\/strong\u003e FS 44, FS 55, FS 55R, FS 55RC, FS 56, FS 56C, FS 70, FS 70R.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStihl FS Series (Professional):\u003c\/strong\u003e FS 80, FS 83, FS 85, FS 87, FS 90, FS 90R, FS 94, FS 100RX, FS 110, FS 110R, FS 120, FS 130, FS 130R, FS 240, FS 240R.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStihl KM Series (Kombi):\u003c\/strong\u003e KM 55, KM 56, KM 85, KM 90, KM 110, KM 130 with trimmer attachments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e Specifically for the AutoCut 25-2 head. If your trimmer is equipped with the FixCut or PolyCut head, this cap will not be compatible.\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 Bottom:\u003c\/strong\u003e The center of the cap has ground down from contact with pavement to the point where the internal spring is visible or the cap has become paper-thin.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBroken Locking Tabs:\u003c\/strong\u003e One or both of the side \"snap\" tabs have cracked or snapped off, which can cause the cap and spool to fly off during operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVisible Stress Fractures:\u003c\/strong\u003e Small white lines or cracks appearing in the black plastic, indicating the material has become brittle and is prone to failure at high RPMs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLoose Fitment:\u003c\/strong\u003e The cap no longer \"clicks\" firmly into the head housing, causing the internal spool to vibrate or the line to advance uncontrollably.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMelting or Heat Damage:\u003c\/strong\u003e Significant warping of the plastic due to friction heat from the trimmer head or repeated contact with hot asphalt.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Tips\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eClear the Debris:\u003c\/strong\u003e Before snapping on the new cap, use a stiff brush or screwdriver to remove dried grass, mud, and debris from the locking slots on the trimmer head housing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck the Spring:\u003c\/strong\u003e Ensure the internal metal spring is seated flat and is not rusted or collapsed. A weak spring will cause the head to dump all the line at once.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTab Alignment:\u003c\/strong\u003e Align the two tabs of the cap with the corresponding notches on the trimmer head. Press down firmly on both sides simultaneously until you hear a distinct \"click.\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe Manual Pull Test:\u003c\/strong\u003e After installation, give the cap a firm tug by hand to ensure both tabs are fully locked. A loose cap can become a high-velocity projectile at full throttle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvoid Riding the Ground:\u003c\/strong\u003e To prolong the life of your new cap, try to keep the trimmer head slightly elevated. Only make contact with the ground when you need to \"bump\" for more line.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BlueStarsParts","offers":[{"title":"Default Title","offer_id":45371209679037,"sku":"AZ00276061","price":21.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2576\/7548\/files\/AZ00276061_1_6d8b6ad1-cbdf-4792-93d9-01f8a7223b14.jpg?v=1762246297","url":"https:\/\/bluestarsparts.com\/products\/trimmer-head-spool-cap-cover-6pack","provider":"BlueStars Parts","version":"1.0","type":"link"}