{"title":"HL 91","description":"\u003ch2 class=\"h4\"\u003eSTIHL HL 91 Genuine OEM Hedge Trimmer Parts\u003c\/h2\u003e\n\n\u003cp\u003eFind genuine STIHL OEM parts for an HL 91 long-reach hedge trimmer when you need routine maintenance, a replacement component, or a planned repair. This collection supports model-specific parts lookup by OEM reference, service system, and stated application. Start with the complete HL 91 designation, serial number, and original part number whenever possible. Compare the product title, description, quantity, and fitment details before placing an order.\u003c\/p\u003e\n\n\u003ch2 class=\"h4\"\u003eIdentify the HL 91 Repair System First\u003c\/h2\u003e\n\n\u003cp\u003eBegin with the symptom and inspect the complete related assembly. A damaged blade, difficult starting, fuel leak, reduced cutting action, excess vibration, control concern, worn gearhead, or loose drive tube can each have several causes. Do not replace a visible component without checking the parts around it. Inspect connected mounts, hardware, seals, fasteners, and drive components before building your order so the repair addresses the actual source of the problem.\u003c\/p\u003e\n\n\u003ch2 class=\"h4\"\u003eHL 91 Parts by Service Area\u003c\/h2\u003e\n\n\u003cp\u003eDepending on current inventory, this collection may include genuine STIHL HL 91 OEM components for common hedge-trimmer maintenance and repair systems:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eblade assembly, cutters, guards, blade-drive pieces, fasteners, and cutting-head hardware;\u003c\/li\u003e\n  \u003cli\u003egearhead, gearbox, drive shaft, drive tube, couplings, bearings, and mounting components;\u003c\/li\u003e\n  \u003cli\u003ethrottle trigger, stop switch, control handle, throttle cable, lockout, and control hardware;\u003c\/li\u003e\n  \u003cli\u003eair filter, intake, carburetor, fuel tank, fuel line, filter, vent, and fuel-system parts;\u003c\/li\u003e\n  \u003cli\u003estarter housing, recoil mechanism, rope, pulley, spring, ignition, wiring, and switch components;\u003c\/li\u003e\n  \u003cli\u003eengine, cylinder, piston, crankcase, seals, gaskets, covers, caps, clips, and service hardware.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eUse the service category to narrow the search, then verify the exact item on the product page. A listing may be for one component, a kit, or an assembly. Confirm the OEM reference, stated HL 91 application, quantity, product details, and included pieces. Check whether screws, seals, clips, clamps, hardware, or other installation parts are included or need to be ordered separately.\u003c\/p\u003e\n\n\u003ch2 class=\"h4\"\u003eInspect the Blade, Gearhead, and Drive Tube\u003c\/h2\u003e\n\n\u003cp\u003eThe cutting head and drive components should be inspected as one operating system. Check the blades, guards, gearhead, drive tube, drive shaft, couplings, mounts, and fasteners for wear, damage, looseness, or abnormal vibration. Keep debris and plant material out of the cutting area. A damaged blade, loose fastener, worn coupling, cracked guard, or improperly installed part should be corrected before using the HL 91.\u003c\/p\u003e\n\n\u003cp\u003eAllow the engine to cool and secure the hedge trimmer before working near the blades or gearhead. Use suitable protective equipment and follow STIHL safety information for the equipment. Do not force blade components, gearbox hardware, threaded fasteners, or drive-tube parts. If you are uncertain about blade, gearhead, shaft, or cutting-head service, consult a qualified outdoor-power-equipment technician.\u003c\/p\u003e\n\n\u003ch2 class=\"h4\"\u003eCheck Engine, Fuel, Starting, and Controls\u003c\/h2\u003e\n\n\u003cp\u003eHard starting, poor acceleration, stalling, fuel leakage, irregular running, or a starter problem can have several causes. Inspect the connected system methodically before choosing replacement parts. Fuel concerns may involve the tank, line, filter, vent, intake, carburetor, connection, or seal. Starter service may involve the rope, pulley, spring, grip, housing, ignition, wiring, or fasteners. Use applicable parts information to create a complete HL 91 repair order.\u003c\/p\u003e\n\n\u003ch2 class=\"h4\"\u003eConfirm Safe Operation Before Trimming\u003c\/h2\u003e\n\n\u003cp\u003eBefore returning the HL 91 to work, inspect the blade assembly, guards, gearhead mounts, drive tube, throttle trigger, lockout, stop switch, handle mounts, fasteners, and covers. Replace parts that are loose, cracked, damaged, missing, or not functioning normally. Follow STIHL operating and service information for the exact tool configuration. Do not operate the hedge trimmer until the blades, guards, controls, and drive components are correctly installed.\u003c\/p\u003e\n\n\u003ch3 class=\"h5\"\u003eUse Qualified Service for Complex Hedge Trimmer Repairs\u003c\/h3\u003e\n\n\u003cp\u003eBlade, gearhead, drive-shaft, engine, fuel-system, ignition, and safety repairs can require specialized tools and experience. A parts catalog can identify components but cannot diagnose the cause of a mechanical problem. For work beyond routine maintenance or your skill level, consult a qualified outdoor-power-equipment or small-engine technician.\u003c\/p\u003e\n\n\u003ch2 class=\"h4\"\u003eHL 91 Parts FAQ\u003c\/h2\u003e\n\n\u003ch3 class=\"h5\"\u003eHow do I identify the correct HL 91 blade or gearhead part?\u003c\/h3\u003e\n\n\u003cp\u003eUse the original OEM number whenever possible. If it is unavailable, use the exact model, serial information, illustrated parts diagram, and the part's mounting location.\u003c\/p\u003e\n\n\u003ch3 class=\"h5\"\u003eCan I use a hedge trimmer part from another STIHL model on an HL 91?\u003c\/h3\u003e\n\n\u003cp\u003eDo not assume compatibility. Confirm the OEM reference and stated HL 91 application because blade assemblies, gearheads, drive tubes, controls, and guards can differ.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eSTIHL is a registered trademark of its respective owner. References to STIHL and HL 91 identify genuine branded parts and compatible equipment applications.\u003c\/em\u003e\u003c\/p\u003e","products":[{"product_id":"stihl-oem-gearbox-housing-assembly-42436400535-for-hl91-hl92-hl94-hla135-hl-km","title":"STIHL OEM Gearbox Housing Assembly 42436400535 for HL91 HL92 HL94 HLA135 HL-KM","description":"\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-69e4c567-0d48-8397-a8a9-797ad59c1498-8\" data-is-intersecting=\"true\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-69e4c567-0d48-8397-a8a9-797ad59c1498-8\" data-turn-id-container=\"request-69e4c567-0d48-8397-a8a9-797ad59c1498-8\" data-testid=\"conversation-turn-102\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv data-conversation-screenshot-content=\"\" class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"ac497fa0-0d91-4b4d-adc0-8f701a7f7500\" dir=\"auto\" data-message-model-slug=\"gpt-5-5\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" data-turn-start-message=\"true\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full dark markdown-new-styling\"\u003e\n\u003cp data-pm-slice=\"1 1 []\"\u003e\u003cstrong\u003e\u003cspan\u003eGenuine STIHL OEM Gearbox Housing Assembly 4243 640 0535\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBrand new genuine STIHL OEM gearbox housing assembly, part number \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e4243 640 0535\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. Manufactured to OEM specifications for precise fitment, dependable gear drive support, and long service life. A quality replacement for a damaged, worn, or faulty gearbox housing assembly.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eCompatible with the following STIHL products:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eHL 91\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eHL 92\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eHL 94\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eHLA 135\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eHL-KM\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eCondition:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e New\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eBrand:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e STIHL\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eOEM Part Number:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 4243 640 0535\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eType:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Gearbox Housing Assembly\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eIncluded:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e One STIHL gearbox housing assembly, exactly as shown in the photos.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eSHIPS THE SAME DAY OR NEXT BUSINESS DAY\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003ePLEASE NOTE: USPS OFTEN SKIPS THE INITIAL ACCEPTANCE SCAN AT THE POST OFFICE, SO TRACKING MAY NOT UPDATE IMMEDIATELY. IT CAN TAKE SOME TIME UNTIL THE PACKAGE REACHES THE FIRST DISTRIBUTION CENTER AND RECEIVES ITS FIRST SCAN.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePlease verify your part number before purchase to ensure compatibility. If you are unsure, send your equipment model and serial number and I will gladly help confirm fitment.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"STIHL","offers":[{"title":"Default Title","offer_id":58296565891336,"sku":"EB-127536753750","price":153.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/4079\/7192\/files\/57_366aeb66-8f92-44ed-8722-ab02d5cf7d55.png?v=1784913935"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/4079\/7192\/collections\/category_hl91_hl92_hl94_01.png?v=1785965671","url":"https:\/\/timpartsshop.com\/collections\/hl-91.oembed","provider":"TimPartsShop","version":"1.0","type":"link"}