{"product_id":"butom-c1m-el37b-carburetor-for-husqvarna-445-450-series-506450401","title":"Butom C1M-EL37B Carburetor for Husqvarna 445\/450 Series | 506450401","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003eThe Butom C1M-EL37B carburetor kit is designed to replace aging parts on select Husqvarna chainsaws and compatible models. This all-in-one solution combines a ready-to-install carburetor with essential accessories, aiming to restore steady idle, predictable throttle response, and reliable starts. While it offers the feel of a near-original setup, results will vary with proper installation and maintenance. The kit emphasizes practical, real-world performance and ease of use for everyday tasks around the shed, yard, or job site.\u003c\/p\u003e\n\n\u003ch3\u003eCompatibility and replacement details\u003c\/h3\u003e\n\u003cp\u003eThis carburetor replaces C1M-EL37B and 506450401 and is used on Husqvarna 445 and 450 family models, including 445, 445E, 445II, 450, 450E, and 450II. It also lists compatibility with Jonsered CS2245 S II, CS2250 S II, McCulloch CS450, and Craftsman 358382000 chainsaws, making it a versatile option for users with mixed toolsets.\u003c\/p\u003e\n\u003cp\u003eKey specs you may reference during fitment checks include mounting hole distance (center to center) of 31 mm, throttle diameter of 13.9 mm, choke diameter of 19 mm, venturi diameter of 11 mm, fuel inlet line size of 3 mm, and primer bulb line size of 3 mm. These details reflect the kit’s intent to align with common Husqvarna and related models while providing a cohesive substitution path when service parts are scarce.\u003c\/p\u003e\n\n\u003ch3\u003eWhat’s included in the kit\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eButom 506450401 carburetor x1\u003c\/li\u003e\n  \u003cli\u003eAir filter x1\u003c\/li\u003e\n  \u003cli\u003ePrimer pump x1\u003c\/li\u003e\n  \u003cli\u003eSpark plug x1\u003c\/li\u003e\n  \u003cli\u003eFuel filter x1\u003c\/li\u003e\n  \u003cli\u003eFuel line x2\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKey features and performance\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAll-in-one tune up kit\u003c\/strong\u003e saves time and money by providing essential parts in a single package.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFactory-tuned and ready to install\u003c\/strong\u003e for convenient setup and reduced guesswork.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWet flow tested\u003c\/strong\u003e to emulate real-world engine operation and improve consistency.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePremium materials\u003c\/strong\u003e include brass components, composite rubber diaphragms, and an anodized aluminum body to resist heat and wear.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eIn real-world use, you may notice smoother throttle response, steadier starts, and more predictable fueling behavior as components work in concert. The kit’s all-in-one design helps streamline maintenance workflows and minimizes the need for separate purchases, which can be a practical safeguard for busy users and service professionals alike.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation and expectations\u003c\/h3\u003e\n\u003cp\u003eExpect a straightforward install with components designed to match the original fitment. While the kit is pre-tuned for convenience, proper installation, calibration, and routine care will influence long-term performance. For best results, replace worn gaskets and seals as part of a comprehensive tune-up routine.\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: Which models does the Butom C1M-EL37B carburetor fit?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Compatible with Husqvarna 445\/450 series and listed variants, including 445E, 450E, 445II, 450II, plus Jonsered CS2245 S II, CS2250 S II, and McCulloch CS450.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What’s included in the kit and is it ready to install?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The kit includes carburetor, air filter, primer pump, spark plug, fuel filter, and two fuel lines; it arrives factory-tuned for immediate installation.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Butom","offers":[{"title":"Default Title","offer_id":43989729149062,"sku":"B078J6JR4J","price":26.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/1602\/5478\/files\/butom-c1m-el37b-carburetor.jpg?v=1778881927","url":"https:\/\/patiozora.com\/products\/butom-c1m-el37b-carburetor-for-husqvarna-445-450-series-506450401","provider":"PatioZora","version":"1.0","type":"link"}