{"product_id":"biolion-carburetor-kit-for-125cc-140cc-300e-450e-500e-550e-engines-includes-799579-air-filter-primer-bulb","title":"BioLion Carburetor Kit for 125cc–140cc 300E\/450E\/500E\/550E Engines — Includes 799579 Air Filter \u0026 Primer Bulb","description":"\u003cp\u003e\u003cstrong\u003eBioLion 799583 is a direct-replacement carburetor kit (includes 799579 air filter) engineered to restore reliable starting, smooth acceleration, and reduced smoke for 125cc–140cc 300E\/450E\/500E\/550E series lawnmower engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf your mower struggles to start, idles roughly, or emits excessive smoke, a worn or clogged carburetor and air filter are often the cause. This complete kit supplies the 799583 carburetor plus essential installation parts so you can return a compatible 300E\/450E\/500E\/550E engine to dependable operation without buying a costly replacement unit.\u003c\/p\u003e\n\n\u003ch3\u003eWill this carburetor fit my engine model?\u003c\/h3\u003e\n\u003cp\u003eThis kit is designed for a range of small engine models commonly found on lawn mowers and outdoor power equipment. Confirm fit by checking the original part numbers or engine designation before ordering to avoid compatibility issues.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReplaces part numbers: 799583, 595656, 590556, 591160, 591979, 593261\u003c\/li\u003e\n  \u003cli\u003eFits engine series: 300E, 450E, 500E, 550E and variants 09P602, 08P502, 9P602, 8P502\u003c\/li\u003e\n  \u003cli\u003eIntended for 125cc and 140cc single-cylinder engines\u003c\/li\u003e\n  \u003cli\u003eVerify your mower’s engine model and original carburetor part number before installing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does installation and setup work?\u003c\/h3\u003e\n\u003cp\u003eThe kit arrives with the main carburetor and the small parts you’ll need for replacement, reducing downtime and trips to the parts store. Basic hand tools are sufficient for most installs; if you aren’t comfortable with small-engine work, a quick service from a local technician is inexpensive and fast.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIncluded components: carburetor, two gaskets, two clamps, fuel filter, primer bulb, spark plug, spring, and the 799579 air filter\u003c\/li\u003e\n  \u003cli\u003eTypical install time: about 30–60 minutes for someone with basic mechanical skill\u003c\/li\u003e\n  \u003cli\u003eNo specialized calibration equipment required for standard replacements\u003c\/li\u003e\n  \u003cli\u003eInspect hoses, seals, and mounting points while installing to ensure leak-free performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat performance improvements can I expect?\u003c\/h3\u003e\n\u003cp\u003eReplacing a failing carburetor and air filter can eliminate hard-starting, surging, and black exhaust smoke while restoring steady throttle response. The kit aims to return the engine to factory-like fuel delivery and combustion characteristics when installed correctly.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBetter cold starts thanks to included primer bulb and tuned carburetor parts\u003c\/li\u003e\n  \u003cli\u003eSmoother idling and more responsive acceleration under load\u003c\/li\u003e\n  \u003cli\u003eReduced oil and carbon-rich smoke from improved air-fuel mixture\u003c\/li\u003e\n  \u003cli\u003eLonger engine life when carbs and filters are maintained regularly\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat’s included in the kit and why those parts matter?\u003c\/h3\u003e\n\u003cp\u003eBeyond the primary replacement carburetor, the kit contains small consumables that commonly wear or break during removal and reinstallation. Supplying these parts avoids mismatches and lets you complete the job in one visit.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e799583 carburetor: main replacement unit matched to listed part numbers\u003c\/li\u003e\n  \u003cli\u003e799579 air filter: fresh filtration to prevent dirt ingestion\u003c\/li\u003e\n  \u003cli\u003eFuel filter and clamps: ensure clean fuel flow and secure lines\u003c\/li\u003e\n  \u003cli\u003eGaskets, primer bulb, spark plug, and spring: necessary for leak-free, functional assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This carburetor kit is aimed at homeowners, landscapers, and small-equipment mechanics who maintain 125cc–140cc lawnmowers and need a reliable replacement without sourcing multiple separate parts. It’s ideal for anyone troubleshooting hard starts, unstable idle, acceleration problems, or heavy smoke on compatible 300E\/450E\/500E\/550E engines and who prefers a ready-to-install kit to get equipment back in service quickly.\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: Does this replace part number 595656?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The BioLion 799583 carburetor replaces 595656 and other listed numbers; verify your original part number before purchasing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the 799579 air filter included?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The kit includes the 799579 air filter along with the carburetor and necessary installation parts.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"BioLion","offers":[{"title":"Default Title","offer_id":48084351975582,"sku":"B0F9XSWMSQ","price":31.97,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/biolion-carburetor-front-view_08f33eb0-1bcc-4701-81f9-c914323edb33.jpg?v=1785851480","url":"https:\/\/northtrailauto.ca\/products\/biolion-carburetor-kit-for-125cc-140cc-300e-450e-500e-550e-engines-includes-799579-air-filter-primer-bulb","provider":"North Trail Auto","version":"1.0","type":"link"}