{"product_id":"carbhub-cylinder-assembly-for-stihl-023-025-ms230-ms250-42-5mm-complete-rebuild-kit-with-crankshaft-spark-plug","title":"Carbhub Cylinder Assembly for STIHL 023\/025 MS230\/MS250 — 42.5mm Complete Rebuild Kit with Crankshaft \u0026 Spark Plug","description":"\u003cp\u003e\u003cstrong\u003eHigh-quality Carbhub 42.5mm cylinder assembly kit engineered to replace worn engine parts on STIHL 023, 025, MS230 and MS250 chainsaws for a reliable rebuild.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf your STIHL saw is losing compression, smoking, or starting poorly, this complete 42.5mm cylinder assembly from Carbhub provides the core components needed to restore engine performance. The kit includes a precision-machined cylinder, piston, crankshaft and all accompanying seals, bearings, and fasteners so you can perform a full small-engine overhaul without sourcing multiple parts. Built to fit the common STIHL 023\/025 and MS230\/MS250 models, the parts are sized and packaged for straightforward replacement and reduced downtime.\u003c\/p\u003e\n\n\u003ch3\u003eWhat comes in the Carbhub 42.5mm cylinder assembly kit?\u003c\/h3\u003e\n\u003cp\u003eThe kit supplies every major internals component required for a thorough cylinder and crankcase refresh. Components are matched for fit and timing to simplify installation and minimize compatibility issues.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e1x precision cylinder body (42.5mm)\u003c\/li\u003e\n  \u003cli\u003e1x matching piston (42.5mm) with 2 piston rings and 2 clips\u003c\/li\u003e\n  \u003cli\u003e1x wrist pin and bearing cage\u003c\/li\u003e\n  \u003cli\u003e1x crankshaft with 2 crankshaft bearings and oil seals\u003c\/li\u003e\n  \u003cli\u003e1x spark plug and crankcase cover (engine pan) with 4 mounting bolts\u003c\/li\u003e\n  \u003cli\u003e1x extra crankcase connector included\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does this assembly improve saw performance?\u003c\/h3\u003e\n\u003cp\u003eReplacing worn cylinder components restores compression and reduces blow-by, which helps the engine burn fuel more efficiently and start more reliably. Fresh bearings and seals also eliminate common leak and play points, improving overall smoothness and reducing vibration.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRestores cylinder compression for stronger throttle response\u003c\/li\u003e\n  \u003cli\u003eNew piston rings reduce oil consumption and smoke\u003c\/li\u003e\n  \u003cli\u003eReplaced bearings and seals prevent leaks and looseness\u003c\/li\u003e\n  \u003cli\u003eIncluded spark plug ensures proper ignition after rebuild\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs this assembly compatible with my STIHL model and how hard is installation?\u003c\/h3\u003e\n\u003cp\u003eThe Carbhub kit is designed for STIHL 023, 025, MS230 and MS250 chainsaws that use a 42.5mm bore. Basic small-engine mechanical skills and the right tools are required; installation involves disassembly of the clutch, muffler, carburetor linkages and removal of the old cylinder, piston and crankshaft.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with STIHL 023, 025, MS230, MS250 (42.5mm bore)\u003c\/li\u003e\n  \u003cli\u003eModerate difficulty—recommended for users comfortable with engine rebuilds\u003c\/li\u003e\n  \u003cli\u003eUse torque specs, gaskets and proper timing during reassembly\u003c\/li\u003e\n  \u003cli\u003eProfessional installation suggested if unfamiliar with 2-stroke crankcase assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I check after installing the new cylinder assembly?\u003c\/h3\u003e\n\u003cp\u003eAfter assembly, verify compression, check for oil or fuel leaks, and confirm the engine idles and revs smoothly. A short break-in period under light load helps rings seat properly and ensures long-term reliability.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePerform compression test to confirm restoration of pressure\u003c\/li\u003e\n  \u003cli\u003eInspect for leaks at seals, gaskets and crankcase connector\u003c\/li\u003e\n  \u003cli\u003eRun at low RPM initially for ring seating, then test under load\u003c\/li\u003e\n  \u003cli\u003eRe-torque bolts after warm-up if manufacturer recommends\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This Carbhub 42.5mm cylinder assembly kit is ideal for homeowners, arborists and professional saw technicians who want a cost-effective way to revive a tired STIHL 023\/025 or MS230\/MS250. If your saw exhibits poor starting, reduced power, excessive smoke or oil leaks, and you can handle or arrange a mechanical rebuild, this all-in-one kit supplies the matched parts needed to get the saw back into dependable service.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this fit my STIHL MS230?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The Carbhub 42.5mm cylinder assembly is made to fit STIHL MS230 and other listed 42.5mm models.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the kit include the crankshaft?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The package includes a crankshaft plus bearings, oil seals and the crankcase cover.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Carbhub","offers":[{"title":"Default Title","offer_id":56799047680340,"sku":"B078MFXPVJ","price":84.21,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/carbhub-cylinder-front-packaging.jpg?v=1786728556","url":"https:\/\/gardenluxe.co.uk\/products\/carbhub-cylinder-assembly-for-stihl-023-025-ms230-ms250-42-5mm-complete-rebuild-kit-with-crankshaft-spark-plug","provider":"Gardenluxe Uk","version":"1.0","type":"link"}