{"product_id":"4137-640-0100-gear-box-for-stihl-fs44-fs65-fs72-fs74-fs75-fs76-fs80","title":"4137 640 0100 Gear Box For Stihl FS44 FS65 FS72 FS74 FS75 FS76 FS80","description":"\u003cstrong\u003eThis Gear Box is a replacement gearbox compatible with STIHL FS44, FS65, FS72, FS74, FS75, FS76, FS80 and matches OEM Part# 4137 640 0100.\u003c\/strong\u003e\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThis gear box is a direct replacement drive head for STIHL FS-series trimmers and brushcutters. It transfers engine power to the cutting attachment, ensuring reliable operation in demanding yard work.\u003c\/p\u003e\u003ch3\u003eKey Features \u0026amp; Performance\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eConstructed from high-strength aluminum and steel for durability\u003c\/li\u003e\n\u003cli\u003ePrecision-ground gears reduce noise and improve efficiency\u003c\/li\u003e\n\u003cli\u003eSealed design keeps out dirt and grass clippings\u003c\/li\u003e\n\u003cli\u003eEasy bolt-on installation using existing hardware\u003c\/li\u003e\n\u003cli\u003eOEM-equivalent quality for seamless performance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment \u0026amp; Compatibility\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSTIHL FS44\u003c\/li\u003e\n\u003cli\u003eSTIHL FS65\u003c\/li\u003e\n\u003cli\u003eSTIHL FS72\u003c\/li\u003e\n\u003cli\u003eSTIHL FS74\u003c\/li\u003e\n\u003cli\u003eSTIHL FS75\u003c\/li\u003e\n\u003cli\u003eSTIHL FS76\u003c\/li\u003e\n\u003cli\u003eSTIHL FS80\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCommon Uses\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eReplacing worn or damaged gear boxes on STIHL string trimmers\u003c\/li\u003e\n\u003cli\u003eRestoring cutting performance in residential and commercial lawn care\u003c\/li\u003e\n\u003cli\u003eMaintaining brushcutters for heavy vegetation clearing\u003c\/li\u003e\n\u003cli\u003eUpgrading older equipment with a factory-spec component\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number(s):\u003c\/strong\u003e 4137 640 0100\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Aluminum housing with steel gears\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e Approx. 0.5 lbs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Will this gear box fit my STIHL FS55?\u003cstrong\u003e A:\u003c\/strong\u003e This gear box is specifically designed for FS44, FS65, FS72, FS74, FS75, FS76, and FS80 models; other models may require different part numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Does the gear box come pre-greased?\u003cstrong\u003e A:\u003c\/strong\u003e Yes, it is factory-packed with lubricant and ready for installation.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eProduct appearance and specifications may vary slightly by batch. Compatibility may vary by serial number. Verify fitment before purchase.\u003c\/em\u003e\u003c\/p\u003e","brand":"DURAFORCE","offers":[{"title":"Default Title","offer_id":53721936986385,"sku":"ZZ3C00652","price":52.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0250\/2446\/2929\/files\/s-l1600_a24d2980-c372-43c3-a407-efde4e1e9c90.jpg?v=1782824289","url":"https:\/\/www.duraforce.com\/products\/4137-640-0100-gear-box-for-stihl-fs44-fs65-fs72-fs74-fs75-fs76-fs80","provider":"DURAFORCE","version":"1.0","type":"link"}