{"product_id":"husqvarna-545081864-piston-connecting-rod-kit-genuine-oem-replacement-engine-kit","title":"Husqvarna 545081864 Piston \u0026 Connecting Rod Kit – Genuine OEM Replacement Engine Kit","description":"\u003cdiv class=\"\"\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-(--sticky-padding-top)\" dir=\"auto\"\u003e\u003c\/section\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"\"\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\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-8 [--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 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 dir=\"auto\" 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\" 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 light markdown-new-styling\"\u003e\n\u003cp\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e 545081864\u003cbr\u003e\u003cstrong\u003eCategory:\u003c\/strong\u003e Small Engine Piston, Connecting Rod \u0026amp; Internal Engine Components\u003cbr\u003e\u003cstrong\u003eType:\u003c\/strong\u003e Piston \u0026amp; Connecting Rod Kit – Genuine OEM Replacement Engine Kit\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003eThe \u003cstrong\u003eHusqvarna 545081864 Piston \u0026amp; Connecting Rod Kit\u003c\/strong\u003e is a genuine OEM replacement internal engine kit designed for select \u003cstrong\u003eHusqvarna, Poulan, Poulan Pro, and compatible gas-powered outdoor power equipment\u003c\/strong\u003e. The kit provides the factory-specified piston and connecting-rod components used to restore the reciprocating assembly of compatible engines.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 545081864\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Husqvarna\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Piston \u0026amp; Connecting Rod Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Description:\u003c\/strong\u003e Piston \/ Connecting Rod Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComponent Type:\u003c\/strong\u003e Internal Engine Repair Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Transfers Combustion Force from the Piston to the Crankshaft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem:\u003c\/strong\u003e Piston \/ Connecting Rod \/ Crankshaft Assembly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Gas-Powered Outdoor Power Equipment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Brand:\u003c\/strong\u003e Husqvarna\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdditional Applications:\u003c\/strong\u003e Select Poulan \/ Poulan Pro Equipment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Type:\u003c\/strong\u003e Small Gasoline Engine\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComponent Location:\u003c\/strong\u003e Internal Engine \/ Crankcase \u0026amp; Cylinder Assembly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplacement Type:\u003c\/strong\u003e Direct OEM Replacement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Status:\u003c\/strong\u003e Genuine Husqvarna OEM Part\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e New\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 Piston \u0026amp; Connecting Rod Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number Reference:\u003c\/strong\u003e 545081864\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlternate Number Format:\u003c\/strong\u003e 545 08 18-64\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Husqvarna OEM replacement engine kit\u003c\/li\u003e\n\u003cli\u003eFactory-specified piston and connecting rod components\u003c\/li\u003e\n\u003cli\u003eDesigned for select compatible small-engine applications\u003c\/li\u003e\n\u003cli\u003eReplaces damaged or excessively worn internal engine components\u003c\/li\u003e\n\u003cli\u003eHelps restore the engine's reciprocating assembly\u003c\/li\u003e\n\u003cli\u003ePiston receives combustion force within the cylinder\u003c\/li\u003e\n\u003cli\u003eConnecting rod transfers piston movement to the crankshaft\u003c\/li\u003e\n\u003cli\u003eSupports proper engine compression when used with serviceable mating components\u003c\/li\u003e\n\u003cli\u003eDesigned to operate with the applicable factory crankshaft and cylinder\u003c\/li\u003e\n\u003cli\u003eManufactured to original equipment requirements\u003c\/li\u003e\n\u003cli\u003eProvides application-specific dimensions and fit\u003c\/li\u003e\n\u003cli\u003eSuitable for internal engine repair and rebuilding\u003c\/li\u003e\n\u003cli\u003eUseful following piston or connecting-rod damage\u003c\/li\u003e\n\u003cli\u003eHelps restore an engine affected by mechanical wear or failure\u003c\/li\u003e\n\u003cli\u003eDirect replacement for applications requiring \u003cstrong\u003e545081864\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eGenuine OEM engine components rather than an unspecified universal rebuild kit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eHusqvarna 545081864 Piston \u0026amp; Connecting Rod Kit\u003c\/strong\u003e is intended for select Husqvarna-family equipment and engine configurations specifically designed to use this OEM engine kit.\u003c\/p\u003e\n\u003cp\u003eApplications may include select:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHusqvarna outdoor power equipment\u003c\/li\u003e\n\u003cli\u003ePoulan outdoor power equipment\u003c\/li\u003e\n\u003cli\u003ePoulan Pro equipment\u003c\/li\u003e\n\u003cli\u003eGas-powered lawn and garden equipment\u003c\/li\u003e\n\u003cli\u003eSmall-engine piston assemblies\u003c\/li\u003e\n\u003cli\u003eConnecting-rod assemblies\u003c\/li\u003e\n\u003cli\u003eCrankshaft and piston repairs\u003c\/li\u003e\n\u003cli\u003eInternal engine rebuilding\u003c\/li\u003e\n\u003cli\u003eEngine overhaul applications\u003c\/li\u003e\n\u003cli\u003eEquipment restoration\u003c\/li\u003e\n\u003cli\u003eOEM replacement applications requiring \u003cstrong\u003e545081864\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBecause engines that appear externally similar may use different pistons, rods, crankshafts, cylinders, wrist pins, and bearings, compatibility should always be verified using the \u003cstrong\u003ecomplete equipment model and product number\u003c\/strong\u003e.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003ePiston \u0026amp; Connecting Rod Function\u003c\/h2\u003e\n\u003cp\u003eThe piston and connecting rod work together as part of the engine's reciprocating assembly.\u003c\/p\u003e\n\u003cp\u003eDuring the combustion cycle:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eThe fuel-air mixture burns inside the cylinder.\u003c\/li\u003e\n\u003cli\u003eExpanding combustion gases force the piston downward.\u003c\/li\u003e\n\u003cli\u003eThe connecting rod transfers this force from the piston to the crankshaft.\u003c\/li\u003e\n\u003cli\u003eThe crankshaft converts the piston's reciprocating motion into rotational movement.\u003c\/li\u003e\n\u003cli\u003eThe piston then travels through the remaining engine cycle as the crankshaft continues rotating.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eProper fit and condition of the piston, connecting rod, crankshaft, cylinder, bearings, and related components are essential for reliable engine operation.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eCommon Reasons for Replacement\u003c\/h2\u003e\n\u003cp\u003eReplacement of the \u003cstrong\u003e545081864 Piston \u0026amp; Connecting Rod Kit\u003c\/strong\u003e may be appropriate following:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePiston scoring\u003c\/li\u003e\n\u003cli\u003ePiston seizure\u003c\/li\u003e\n\u003cli\u003eConnecting rod damage\u003c\/li\u003e\n\u003cli\u003eExcessive internal engine wear\u003c\/li\u003e\n\u003cli\u003eLoss of compression associated with piston damage\u003c\/li\u003e\n\u003cli\u003eOverheating\u003c\/li\u003e\n\u003cli\u003eInsufficient lubrication\u003c\/li\u003e\n\u003cli\u003eMechanical engine failure\u003c\/li\u003e\n\u003cli\u003eExcessive connecting-rod play\u003c\/li\u003e\n\u003cli\u003eDamaged piston-pin area\u003c\/li\u003e\n\u003cli\u003eCylinder damage affecting the piston\u003c\/li\u003e\n\u003cli\u003eCrankshaft-related failure\u003c\/li\u003e\n\u003cli\u003eInternal damage discovered during engine disassembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA damaged piston or connecting rod can often be a symptom of another engine problem, so the complete engine should be inspected before reassembly.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eEngine Inspection During Replacement\u003c\/h2\u003e\n\u003cp\u003eWhen installing a replacement piston and connecting rod kit, inspect related components including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder bore\u003c\/li\u003e\n\u003cli\u003eCylinder wall\u003c\/li\u003e\n\u003cli\u003eCrankshaft\u003c\/li\u003e\n\u003cli\u003eCrankshaft journals\u003c\/li\u003e\n\u003cli\u003eBearings\u003c\/li\u003e\n\u003cli\u003ePiston pin \/ wrist pin\u003c\/li\u003e\n\u003cli\u003ePiston rings\u003c\/li\u003e\n\u003cli\u003eCrankcase\u003c\/li\u003e\n\u003cli\u003eEngine seals\u003c\/li\u003e\n\u003cli\u003eEngine gaskets\u003c\/li\u003e\n\u003cli\u003eLubrication surfaces\u003c\/li\u003e\n\u003cli\u003eIntake system\u003c\/li\u003e\n\u003cli\u003eCooling components\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf the original piston was severely scored or seized, installing a replacement piston without addressing cylinder damage or the underlying cause of failure may result in rapid damage to the new components.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eVerify compatibility with your specific Husqvarna, Poulan, or Poulan Pro equipment model, product number, serial number, engine configuration, and production revision before ordering.\u003c\/li\u003e\n\u003cli\u003eMatch \u003cstrong\u003epart number 545081864\u003c\/strong\u003e directly with the number shown in your equipment's illustrated parts diagram or OEM documentation.\u003c\/li\u003e\n\u003cli\u003eThe alternate formatted part number may appear as \u003cstrong\u003e545 08 18-64\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eThis is an \u003cstrong\u003einternal engine repair component\u003c\/strong\u003e and should only be installed on compatible engine configurations.\u003c\/li\u003e\n\u003cli\u003eDo not select a piston or connecting rod based solely on approximate engine displacement or physical appearance.\u003c\/li\u003e\n\u003cli\u003ePistons can differ in \u003cstrong\u003ediameter, compression height, pin diameter, ring-groove dimensions, skirt profile, crown design, and material\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eConnecting rods can differ in \u003cstrong\u003elength, journal dimensions, piston-pin dimensions, bearing configuration, offset, and lubrication requirements\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eConfirm the exact contents of the \u003cstrong\u003e545081864 kit\u003c\/strong\u003e if a specific piston pin, ring, bearing, clip, fastener, or gasket is required for your repair.\u003c\/li\u003e\n\u003cli\u003eDo not assume that the cylinder, crankshaft, bearings, piston rings, wrist pin, circlips, seals, gaskets, or other engine components are included unless explicitly specified.\u003c\/li\u003e\n\u003cli\u003eInspect the cylinder carefully before installing a replacement piston.\u003c\/li\u003e\n\u003cli\u003eDo not install a new piston into a severely scored, cracked, warped, or excessively worn cylinder.\u003c\/li\u003e\n\u003cli\u003eInspect the crankshaft and applicable rod journal for scoring, discoloration, excessive wear, or heat damage.\u003c\/li\u003e\n\u003cli\u003eCheck applicable bearings for roughness, excessive clearance, discoloration, or physical damage.\u003c\/li\u003e\n\u003cli\u003eDetermine why the original piston or connecting rod failed before installing replacement components.\u003c\/li\u003e\n\u003cli\u003ePotential causes of piston damage can include overheating, insufficient lubrication, incorrect fuel or oil mixture, lean running conditions, intake leaks, cooling problems, or foreign-object damage.\u003c\/li\u003e\n\u003cli\u003eCorrect the underlying engine problem before returning the equipment to service.\u003c\/li\u003e\n\u003cli\u003eKeep all internal engine components and work surfaces clean during disassembly and reassembly.\u003c\/li\u003e\n\u003cli\u003ePrevent dirt, abrasive debris, old gasket material, or metal particles from entering the crankcase or cylinder.\u003c\/li\u003e\n\u003cli\u003eLubricate internal components during assembly according to the applicable manufacturer service procedure.\u003c\/li\u003e\n\u003cli\u003eInstall piston rings, piston pin components, bearings, and retainers in their specified locations and orientations where applicable.\u003c\/li\u003e\n\u003cli\u003eVerify piston orientation before final assembly.\u003c\/li\u003e\n\u003cli\u003eFollow the manufacturer's specified fastener torque values and tightening sequences.\u003c\/li\u003e\n\u003cli\u003eRotate the engine by hand after assembly, where appropriate, to verify that internal components move smoothly without binding.\u003c\/li\u003e\n\u003cli\u003eAfter completing the repair, verify proper compression and engine operation before returning the equipment to normal service.\u003c\/li\u003e\n\u003cli\u003eInternal engine rebuilding requires precise measurements and assembly procedures. Professional service may be appropriate if the required clearances and specifications cannot be verified.\u003c\/li\u003e\n\u003cli\u003eShut off the equipment, allow the engine to cool completely, disconnect the spark plug, drain fuel where required, and follow applicable service procedures before beginning internal engine repairs.\u003c\/li\u003e\n\u003cli\u003eThis listing is for \u003cstrong\u003eone Husqvarna 545081864 Piston \u0026amp; Connecting Rod Kit only\u003c\/strong\u003e unless otherwise specified. Cylinder assemblies, crankshafts, bearings, gaskets, seals, carburetors, and other engine components are sold separately unless explicitly included.\u003c\/li\u003e\n\u003cli\u003eMatch \u003cstrong\u003epart number 545081864\u003c\/strong\u003e with your equipment's illustrated parts diagram or OEM documentation before ordering to ensure proper fitment.\u003c\/li\u003e\n\u003c\/ul\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","brand":"Husqvarna","offers":[{"title":"Default Title","offer_id":53737752985963,"sku":"545081864","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0917\/9201\/5723\/files\/545081864.webp?v=1787070679","url":"https:\/\/generalsprayers.com\/products\/husqvarna-545081864-piston-connecting-rod-kit-genuine-oem-replacement-engine-kit","provider":"GeneralSprayers","version":"1.0","type":"link"}