{"product_id":"stihl-ms-661-c-m-professional-chainsaw-7-3-hp-m-tronic-forestry-saw-16-36-inch-bar","title":"STIHL MS 661 C-M Professional Chainsaw 7.3 HP M-Tronic Forestry Saw 16-36 Inch Bar","description":"\u003ch2 data-section-id=\"12xsfco\" data-start=\"690\" data-end=\"744\"\u003eMaximum Power for Professional Forestry and Logging\u003c\/h2\u003e\n\u003cp data-start=\"746\" data-end=\"1146\"\u003eThe \u003cstrong data-start=\"750\" data-end=\"796\"\u003eSTIHL MS 661 C-M Professional Gas Chainsaw\u003c\/strong\u003e is one of STIHL’s most powerful production chainsaws, engineered specifically for professional forestry crews, loggers, arborists, and demanding commercial applications. Designed to tackle large-diameter hardwoods and intensive cutting operations, the MS 661 C-M combines raw cutting power with advanced technology and professional-grade durability.\u003c\/p\u003e\n\u003cp data-start=\"1148\" data-end=\"1519\"\u003eAt the heart of this powerhouse is a high-performance \u003cstrong data-start=\"1202\" data-end=\"1253\"\u003e91.1cc engine producing 7.3 horsepower (5.4 kW)\u003c\/strong\u003e, delivering exceptional torque and cutting speed even in the most challenging conditions. Whether felling large timber, processing hardwood logs, or working with extended guide bars, the MS 661 C-M provides the power and reliability professionals require every day.\u003c\/p\u003e\n\u003cp data-start=\"1521\" data-end=\"1907\"\u003eFeaturing STIHL’s advanced \u003cstrong data-start=\"1548\" data-end=\"1597\"\u003eM-Tronic™ electronic engine management system\u003c\/strong\u003e, the chainsaw automatically adjusts engine performance based on operating conditions such as temperature, altitude, fuel quality, and air filter condition. This ensures maximum power output, easier starting, optimized fuel consumption, and consistent cutting performance without manual carburetor adjustments.\u003c\/p\u003e\n\u003cp data-start=\"1909\" data-end=\"2159\"\u003eBuilt for intensive professional use, the MS 661 C-M also incorporates a long-life HD2 air filtration system, anti-vibration technology, high-output adjustable oiler, and heavy-duty construction designed to withstand years of demanding forestry work.\u003c\/p\u003e\n\u003chr data-start=\"2161\" data-end=\"2164\"\u003e\n\u003ch2 data-section-id=\"939trr\" data-start=\"2166\" data-end=\"2192\"\u003eKey Features \u0026amp; Benefits\u003c\/h2\u003e\n\u003ch3 data-section-id=\"s6y4z6\" data-start=\"2194\" data-end=\"2232\"\u003eExtreme Professional Cutting Power\u003c\/h3\u003e\n\u003cul data-start=\"2234\" data-end=\"2410\"\u003e\n\u003cli data-section-id=\"5o6n6n\" data-start=\"2234\" data-end=\"2272\"\u003eHigh-output 91.1cc two-stroke engine\u003c\/li\u003e\n\u003cli data-section-id=\"119hf9i\" data-start=\"2273\" data-end=\"2299\"\u003eProduces 7.3 HP (5.4 kW)\u003c\/li\u003e\n\u003cli data-section-id=\"w7qtrr\" data-start=\"2300\" data-end=\"2350\"\u003eExceptional torque for large timber applications\u003c\/li\u003e\n\u003cli data-section-id=\"gyfhkg\" data-start=\"2351\" data-end=\"2410\"\u003eDesigned for professional forestry and logging operations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"1djy9y1\" data-start=\"2412\" data-end=\"2461\"\u003eSTIHL M-Tronic™ Intelligent Engine Management\u003c\/h3\u003e\n\u003cul data-start=\"2463\" data-end=\"2672\"\u003e\n\u003cli data-section-id=\"ewygh3\" data-start=\"2463\" data-end=\"2515\"\u003eAutomatically adjusts engine settings in real time\u003c\/li\u003e\n\u003cli data-section-id=\"1vxflil\" data-start=\"2516\" data-end=\"2561\"\u003eOptimizes fuel delivery and ignition timing\u003c\/li\u003e\n\u003cli data-section-id=\"1wvvnku\" data-start=\"2562\" data-end=\"2619\"\u003eCompensates for altitude, temperature, and fuel quality\u003c\/li\u003e\n\u003cli data-section-id=\"1e0gy0g\" data-start=\"2620\" data-end=\"2672\"\u003eDelivers maximum performance without manual tuning\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"xow075\" data-start=\"2674\" data-end=\"2711\"\u003eOutstanding Power-to-Weight Ratio\u003c\/h3\u003e\n\u003cul data-start=\"2713\" data-end=\"2925\"\u003e\n\u003cli data-section-id=\"gwfg2m\" data-start=\"2713\" data-end=\"2775\"\u003eProfessional-grade design balances power and maneuverability\u003c\/li\u003e\n\u003cli data-section-id=\"11fr8fo\" data-start=\"2776\" data-end=\"2828\"\u003eExceptional cutting performance relative to weight\u003c\/li\u003e\n\u003cli data-section-id=\"1fofixi\" data-start=\"2829\" data-end=\"2875\"\u003eReduces operator fatigue during extended use\u003c\/li\u003e\n\u003cli data-section-id=\"165bm4w\" data-start=\"2876\" data-end=\"2925\"\u003eImproves productivity in demanding environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"1yhadfi\" data-start=\"2927\" data-end=\"2966\"\u003eLong-Life HD2 Air Filtration System\u003c\/h3\u003e\n\u003cul data-start=\"2968\" data-end=\"3142\"\u003e\n\u003cli data-section-id=\"1u9qju4\" data-start=\"2968\" data-end=\"2993\"\u003eWashable HD2 air filter\u003c\/li\u003e\n\u003cli data-section-id=\"d8eh6n\" data-start=\"2994\" data-end=\"3042\"\u003eSuperior engine protection in dusty conditions\u003c\/li\u003e\n\u003cli data-section-id=\"142jvpw\" data-start=\"3043\" data-end=\"3091\"\u003eLonger operating intervals between maintenance\u003c\/li\u003e\n\u003cli data-section-id=\"rq32rw\" data-start=\"3092\" data-end=\"3142\"\u003eLower maintenance costs and improved reliability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"shtf8y\" data-start=\"3144\" data-end=\"3191\"\u003eBuilt for Large Timber and Hardwood Cutting\u003c\/h3\u003e\n\u003cul data-start=\"3193\" data-end=\"3378\"\u003e\n\u003cli data-section-id=\"owfxx8\" data-start=\"3193\" data-end=\"3237\"\u003eCompatible with guide bars from 16″ to 36″\u003c\/li\u003e\n\u003cli data-section-id=\"1pkfcja\" data-start=\"3238\" data-end=\"3293\"\u003eIdeal for felling large trees and processing hardwood\u003c\/li\u003e\n\u003cli data-section-id=\"j76y42\" data-start=\"3294\" data-end=\"3332\"\u003eProfessional-grade 3\/8″ chain system\u003c\/li\u003e\n\u003cli data-section-id=\"fddlae\" data-start=\"3333\" data-end=\"3378\"\u003eDesigned for high-volume commercial cutting\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"8xsc29\" data-start=\"3380\" data-end=\"3410\"\u003eAdjustable Automatic Oiler\u003c\/h3\u003e\n\u003cul data-start=\"3412\" data-end=\"3553\"\u003e\n\u003cli data-section-id=\"14wc49o\" data-start=\"3412\" data-end=\"3439\"\u003eHigh-output oiling system\u003c\/li\u003e\n\u003cli data-section-id=\"8jzgjn\" data-start=\"3440\" data-end=\"3471\"\u003eAdjustable lubrication levels\u003c\/li\u003e\n\u003cli data-section-id=\"1dq26i6\" data-start=\"3472\" data-end=\"3512\"\u003eSupports longer guide bars effectively\u003c\/li\u003e\n\u003cli data-section-id=\"1rui3hy\" data-start=\"3513\" data-end=\"3553\"\u003eImproves chain and guide bar longevity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"igk79z\" data-start=\"3555\" data-end=\"3596\"\u003eReduced Vibration for Greater Comfort\u003c\/h3\u003e\n\u003cul data-start=\"3598\" data-end=\"3751\"\u003e\n\u003cli data-section-id=\"10ukuc3\" data-start=\"3598\" data-end=\"3636\"\u003eAdvanced STIHL anti-vibration system\u003c\/li\u003e\n\u003cli data-section-id=\"11lxns9\" data-start=\"3637\" data-end=\"3665\"\u003eMinimizes operator fatigue\u003c\/li\u003e\n\u003cli data-section-id=\"1rzdmru\" data-start=\"3666\" data-end=\"3706\"\u003eImproves cutting precision and control\u003c\/li\u003e\n\u003cli data-section-id=\"1n3n17h\" data-start=\"3707\" data-end=\"3751\"\u003eEnhances comfort during long work sessions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"11ntm0e\" data-start=\"3753\" data-end=\"3781\"\u003eEasy Starting Technology\u003c\/h3\u003e\n\u003cul data-start=\"3783\" data-end=\"3968\"\u003e\n\u003cli data-section-id=\"iutlz\" data-start=\"3783\" data-end=\"3824\"\u003eM-Tronic™ controlled starting procedure\u003c\/li\u003e\n\u003cli data-section-id=\"haxnyz\" data-start=\"3825\" data-end=\"3876\"\u003eElastoStart™ starter handle reduces pulling force\u003c\/li\u003e\n\u003cli data-section-id=\"qba2d7\" data-start=\"3877\" data-end=\"3925\"\u003eDecompression valve lowers starting resistance\u003c\/li\u003e\n\u003cli data-section-id=\"1j1p2rn\" data-start=\"3926\" data-end=\"3968\"\u003eFast, smooth, and reliable engine starts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"mduggm\" data-start=\"3970\" data-end=\"4002\"\u003eProfessional Safety Features\u003c\/h3\u003e\n\u003cul data-start=\"4004\" data-end=\"4146\"\u003e\n\u003cli data-section-id=\"1v3a4ys\" data-start=\"4004\" data-end=\"4034\"\u003eSTIHL Quickstop® chain brake\u003c\/li\u003e\n\u003cli data-section-id=\"5rov4z\" data-start=\"4035\" data-end=\"4064\"\u003eSide-access chain tensioner\u003c\/li\u003e\n\u003cli data-section-id=\"pj9lx\" data-start=\"4065\" data-end=\"4112\"\u003eHeavy-duty bumper spikes for enhanced control\u003c\/li\u003e\n\u003cli data-section-id=\"u6vwo1\" data-start=\"4113\" data-end=\"4146\"\u003eTrigger interlock safety system\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"3wwh4w\" data-start=\"4148\" data-end=\"4181\"\u003eDurable Forestry Construction\u003c\/h3\u003e\n\u003cul data-start=\"4183\" data-end=\"4355\"\u003e\n\u003cli data-section-id=\"12va93a\" data-start=\"4183\" data-end=\"4216\"\u003eHeavy-duty professional chassis\u003c\/li\u003e\n\u003cli data-section-id=\"1tfycet\" data-start=\"4217\" data-end=\"4256\"\u003eLightweight yet rugged sprocket cover\u003c\/li\u003e\n\u003cli data-section-id=\"1j7cqv2\" data-start=\"4257\" data-end=\"4296\"\u003eCaptive bar nuts simplify maintenance\u003c\/li\u003e\n\u003cli data-section-id=\"w5gc2\" data-start=\"4297\" data-end=\"4355\"\u003eBuilt for daily commercial use in demanding environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"4357\" data-end=\"4360\"\u003e\n\u003ch2 data-section-id=\"1cgu054\" data-start=\"4362\" data-end=\"4389\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\" data-start=\"4391\" data-end=\"5206\"\u003e\n\u003cthead data-start=\"4391\" data-end=\"4418\"\u003e\n\u003ctr data-start=\"4391\" data-end=\"4418\"\u003e\n\u003cth class=\"last:pe-10\" data-start=\"4391\" data-end=\"4407\" data-col-size=\"sm\"\u003eSpecification\u003c\/th\u003e\n\u003cth class=\"last:pe-10\" data-start=\"4407\" data-end=\"4418\" data-col-size=\"md\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"4447\" data-end=\"5206\"\u003e\n\u003ctr data-start=\"4447\" data-end=\"4464\"\u003e\n\u003ctd data-start=\"4447\" data-end=\"4455\" data-col-size=\"sm\"\u003eBrand\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"4455\" data-end=\"4464\"\u003eSTIHL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4465\" data-end=\"4487\"\u003e\n\u003ctd data-start=\"4465\" data-end=\"4473\" data-col-size=\"sm\"\u003eModel\u003c\/td\u003e\n\u003ctd data-start=\"4473\" data-end=\"4487\" data-col-size=\"md\"\u003eMS 661 C-M\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4488\" data-end=\"4543\"\u003e\n\u003ctd data-start=\"4488\" data-end=\"4502\" data-col-size=\"sm\"\u003eEngine Type\u003c\/td\u003e\n\u003ctd data-start=\"4502\" data-end=\"4543\" data-col-size=\"md\"\u003eProfessional 2-Stroke Gasoline Engine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4544\" data-end=\"4588\"\u003e\n\u003ctd data-start=\"4544\" data-end=\"4566\" data-col-size=\"sm\"\u003eEngine Displacement\u003c\/td\u003e\n\u003ctd data-start=\"4566\" data-end=\"4588\" data-col-size=\"md\"\u003e91.1cc (5.6 cu-in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4589\" data-end=\"4614\"\u003e\n\u003ctd data-start=\"4589\" data-end=\"4604\" data-col-size=\"sm\"\u003ePower Output\u003c\/td\u003e\n\u003ctd data-start=\"4604\" data-end=\"4614\" data-col-size=\"md\"\u003e5.4 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4615\" data-end=\"4638\"\u003e\n\u003ctd data-start=\"4615\" data-end=\"4628\" data-col-size=\"sm\"\u003eHorsepower\u003c\/td\u003e\n\u003ctd data-start=\"4628\" data-end=\"4638\" data-col-size=\"md\"\u003e7.3 HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4639\" data-end=\"4678\"\u003e\n\u003ctd data-start=\"4639\" data-end=\"4659\" data-col-size=\"sm\"\u003eEngine Management\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"4659\" data-end=\"4678\"\u003eSTIHL M-Tronic™\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4679\" data-end=\"4713\"\u003e\n\u003ctd data-start=\"4679\" data-end=\"4692\" data-col-size=\"sm\"\u003eDry Weight\u003c\/td\u003e\n\u003ctd data-start=\"4692\" data-end=\"4713\" data-col-size=\"md\"\u003e16.8 lbs (7.6 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4714\" data-end=\"4751\"\u003e\n\u003ctd data-start=\"4714\" data-end=\"4738\" data-col-size=\"sm\"\u003ePower-to-Weight Ratio\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"4738\" data-end=\"4751\"\u003e1.4 kg\/kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4752\" data-end=\"4809\"\u003e\n\u003ctd data-start=\"4752\" data-end=\"4772\" data-col-size=\"sm\"\u003eGuide Bar Options\u003c\/td\u003e\n\u003ctd data-start=\"4772\" data-end=\"4809\" data-col-size=\"md\"\u003e16″, 18″, 20″, 25″, 28″, 32″, 36″\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4810\" data-end=\"4832\"\u003e\n\u003ctd data-start=\"4810\" data-end=\"4824\" data-col-size=\"sm\"\u003eChain Pitch\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"4824\" data-end=\"4832\"\u003e3\/8″\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4833\" data-end=\"4856\"\u003e\n\u003ctd data-start=\"4833\" data-end=\"4847\" data-col-size=\"sm\"\u003eChain Gauge\u003c\/td\u003e\n\u003ctd data-start=\"4847\" data-end=\"4856\" data-col-size=\"md\"\u003e.050″\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4857\" data-end=\"4905\"\u003e\n\u003ctd data-start=\"4857\" data-end=\"4874\" data-col-size=\"sm\"\u003eAir Filtration\u003c\/td\u003e\n\u003ctd data-start=\"4874\" data-end=\"4905\" data-col-size=\"md\"\u003eHD2 Long-Life Filter System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4906\" data-end=\"4950\"\u003e\n\u003ctd data-start=\"4906\" data-end=\"4920\" data-col-size=\"sm\"\u003eChain Oiler\u003c\/td\u003e\n\u003ctd data-start=\"4920\" data-end=\"4950\" data-col-size=\"md\"\u003eAdjustable Automatic Oiler\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4951\" data-end=\"5007\"\u003e\n\u003ctd data-start=\"4951\" data-end=\"4969\" data-col-size=\"sm\"\u003eStarting System\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"4969\" data-end=\"5007\"\u003eDecompression Valve \u0026amp; ElastoStart™\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"5008\" data-end=\"5042\"\u003e\n\u003ctd data-start=\"5008\" data-end=\"5027\" data-col-size=\"sm\"\u003eChain Tensioning\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"5027\" data-end=\"5042\"\u003eSide Access\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"5043\" data-end=\"5077\"\u003e\n\u003ctd data-start=\"5043\" data-end=\"5057\" data-col-size=\"sm\"\u003eChain Brake\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"5057\" data-end=\"5077\"\u003eSTIHL Quickstop®\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"5078\" data-end=\"5114\"\u003e\n\u003ctd data-start=\"5078\" data-end=\"5096\" data-col-size=\"sm\"\u003eFuel Cap System\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"5096\" data-end=\"5114\"\u003eTool-Free Caps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"5115\" data-end=\"5206\"\u003e\n\u003ctd data-start=\"5115\" data-end=\"5133\" data-col-size=\"sm\"\u003eRecommended Use\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"5133\" data-end=\"5206\"\u003eProfessional Forestry, Logging, Tree Felling, Large Timber Processing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr data-start=\"5208\" data-end=\"5211\"\u003e\n\u003ch2 data-section-id=\"829pby\" data-start=\"5213\" data-end=\"5248\"\u003eWhy Choose the STIHL MS 661 C-M?\u003c\/h2\u003e\n\u003cp data-start=\"5250\" data-end=\"5685\"\u003e✔ Powerful 7.3 HP professional engine\u003cbr data-start=\"5287\" data-end=\"5290\"\u003e✔ Advanced STIHL M-Tronic™ engine management\u003cbr data-start=\"5334\" data-end=\"5337\"\u003e✔ Exceptional power-to-weight ratio\u003cbr data-start=\"5372\" data-end=\"5375\"\u003e✔ Built for large-scale forestry operations\u003cbr data-start=\"5418\" data-end=\"5421\"\u003e✔ Compatible with guide bars up to 36 inches\u003cbr data-start=\"5465\" data-end=\"5468\"\u003e✔ Long-life HD2 filtration system\u003cbr data-start=\"5501\" data-end=\"5504\"\u003e✔ Reduced vibration for operator comfort\u003cbr data-start=\"5544\" data-end=\"5547\"\u003e✔ High-output adjustable automatic oiler\u003cbr data-start=\"5587\" data-end=\"5590\"\u003e✔ Professional-grade durability and reliability\u003cbr data-start=\"5637\" data-end=\"5640\"\u003e✔ Trusted by forestry professionals worldwide\u003c\/p\u003e","brand":"Zayrren","offers":[{"title":"Default Title","offer_id":68020199850169,"sku":"8CCD30F7-8","price":450.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0832\/5683\/6281\/files\/stihl_ms661.jpg?v=1793133011","url":"https:\/\/zayrren.com\/products\/stihl-ms-661-c-m-professional-chainsaw-7-3-hp-m-tronic-forestry-saw-16-36-inch-bar","provider":"Zayrren","version":"1.0","type":"link"}