{"product_id":"stihl-ms661-c-m-petrol-chainsaw","title":"STIHL MS661 C-M Petrol Chainsaw","description":"\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-WEB:90de39c3-a3df-4493-b1a5-09c5e4f1d135-27\" data-is-intersecting=\"true\"\u003e\n\u003cdiv class=\"relative w-full overflow-visible\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\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\" data-turn-id=\"request-WEB:90de39c3-a3df-4493-b1a5-09c5e4f1d135-27\" data-turn-id-container=\"request-WEB:90de39c3-a3df-4493-b1a5-09c5e4f1d135-27\" data-testid=\"conversation-turn-56\" data-scroll-anchor=\"false\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--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 data-message-author-role=\"assistant\" data-message-id=\"1cc57a4c-df37-4aba-bf7b-14c71b2fbcc2\" data-turn-start-message=\"true\" dir=\"auto\" data-message-model-slug=\"gpt-5-5\" 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 data-start=\"48\" data-end=\"505\"\u003eThe STIHL MS 661 C-M Petrol Chainsaw is an extremely powerful professional forestry chainsaw engineered for the toughest felling, harvesting and large timber processing applications. Designed for professional forestry workers and timber harvesting operators, this high-performance chainsaw combines exceptional cutting power with advanced engine management technology and outstanding durability for intensive daily use. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"507\" data-end=\"944\"\u003ePowered by STIHL’s advanced 2-MIX engine technology and intelligent M-Tronic electronic engine management system, the MS 661 C-M delivers maximum torque, rapid acceleration and optimised engine performance in all working conditions. Widely recognised as the competition chainsaw used in the STIHL TIMBERSPORTS® series, it is built to perform in the most demanding professional forestry environments. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4 data-section-id=\"37mg0c\" data-start=\"946\" data-end=\"969\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"950\" data-end=\"967\"\u003eKey Features:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp data-start=\"971\" data-end=\"1148\"\u003e\u003cstrong data-start=\"971\" data-end=\"1024\"\u003eExtremely Powerful Professional Forestry Chainsaw\u003c\/strong\u003e – Designed for heavy-duty forestry, felling and large timber harvesting applications. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1150\" data-end=\"1325\"\u003e\u003cstrong data-start=\"1150\" data-end=\"1189\"\u003eHigh-Performance STIHL 2-MIX Engine\u003c\/strong\u003e – Delivers exceptional cutting power with improved fuel efficiency and reduced exhaust emissions. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1327\" data-end=\"1530\"\u003e\u003cstrong data-start=\"1327\" data-end=\"1374\"\u003eSTIHL M-Tronic Electronic Engine Management\u003c\/strong\u003e – Automatically adjusts ignition timing and fuel metering for optimum engine performance in all operating conditions. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1532\" data-end=\"1715\"\u003e\u003cstrong data-start=\"1532\" data-end=\"1569\"\u003eOutstanding Power-to-Weight Ratio\u003c\/strong\u003e – Lightweight construction for its performance class improves manoeuvrability and reduces operator fatigue. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1717\" data-end=\"1867\"\u003e\u003cstrong data-start=\"1717\" data-end=\"1757\"\u003eProfessional Large Bar Compatibility\u003c\/strong\u003e – Suitable for long guide bars for felling and processing large timber. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1869\" data-end=\"2069\"\u003e\u003cstrong data-start=\"1869\" data-end=\"1898\"\u003eHD2 Air Filtration System\u003c\/strong\u003e – Heavy-duty professional filtration system improves engine protection and extends service intervals in dusty forestry environments. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"2071\" data-end=\"2247\"\u003e\u003cstrong data-start=\"2071\" data-end=\"2105\"\u003eVariable-Displacement Oil Pump\u003c\/strong\u003e – Adjustable oil delivery system reduces chain oil consumption while maintaining effective lubrication. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"2249\" data-end=\"2414\"\u003e\u003cstrong data-start=\"2249\" data-end=\"2283\"\u003eAdvanced Anti-Vibration System\u003c\/strong\u003e – Reduces vibration transfer to the handles for improved comfort during prolonged operation. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"2416\" data-end=\"2570\"\u003e\u003cstrong data-start=\"2416\" data-end=\"2449\"\u003eSide-Mounted Chain Tensioning\u003c\/strong\u003e – Allows fast and safe chain adjustment while keeping hands away from the chain. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"2572\" data-end=\"2730\"\u003e\u003cstrong data-start=\"2572\" data-end=\"2602\"\u003eManual Decompression Valve\u003c\/strong\u003e – Reduces compression pressure during starting for easier and smoother engine starting. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"2732\" data-end=\"2868\"\u003e\u003cstrong data-start=\"2732\" data-end=\"2762\"\u003eCaptive Nut Sprocket Cover\u003c\/strong\u003e – Prevents loss of nuts during maintenance and chain adjustments. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4 data-section-id=\"q2fwjm\" data-start=\"2870\" data-end=\"2890\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"2874\" data-end=\"2888\"\u003eIdeal For:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cul data-start=\"2892\" data-end=\"3088\"\u003e\n\u003cli data-section-id=\"5qrc4w\" data-start=\"2892\" data-end=\"2922\"\u003eProfessional forestry work\u003c\/li\u003e\n\u003cli data-section-id=\"8as8wz\" data-start=\"2923\" data-end=\"2946\"\u003eFelling large trees\u003c\/li\u003e\n\u003cli data-section-id=\"1exlqx0\" data-start=\"2947\" data-end=\"2979\"\u003eTimber harvesting operations\u003c\/li\u003e\n\u003cli data-section-id=\"4143lp\" data-start=\"2980\" data-end=\"3014\"\u003eHeavy-duty woodland management\u003c\/li\u003e\n\u003cli data-section-id=\"htkiy5\" data-start=\"3015\" data-end=\"3048\"\u003eChainsaw milling applications\u003c\/li\u003e\n\u003cli data-section-id=\"je9mn9\" data-start=\"3049\" data-end=\"3088\"\u003eIntensive professional cutting work\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 data-section-id=\"1d57n9x\" data-start=\"3090\" data-end=\"3116\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"3094\" data-end=\"3114\"\u003eProduct Details:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp data-start=\"3118\" data-end=\"3519\"\u003e\u003cstrong data-start=\"3118\" data-end=\"3135\"\u003eProduct Type:\u003c\/strong\u003e Professional Petrol Chainsaw\u003cbr data-start=\"3164\" data-end=\"3167\"\u003e\u003cstrong data-start=\"3167\" data-end=\"3184\"\u003ePower Source:\u003c\/strong\u003e STIHL 2-MIX petrol engine\u003cbr data-start=\"3210\" data-end=\"3213\"\u003e\u003cstrong data-start=\"3213\" data-end=\"3227\"\u003eOperation:\u003c\/strong\u003e Petrol powered\u003cbr data-start=\"3242\" data-end=\"3245\"\u003e\u003cstrong data-start=\"3245\" data-end=\"3261\"\u003eApplication:\u003c\/strong\u003e Professional forestry and large timber processing\u003cbr data-start=\"3311\" data-end=\"3314\"\u003e\u003cstrong data-start=\"3314\" data-end=\"3331\"\u003eDisplacement:\u003c\/strong\u003e 91.1 cm³\u003cbr data-start=\"3340\" data-end=\"3343\"\u003e\u003cstrong data-start=\"3343\" data-end=\"3360\"\u003ePower Output:\u003c\/strong\u003e 5.4kW \/ 7.3HP\u003cbr data-start=\"3374\" data-end=\"3377\"\u003e\u003cstrong data-start=\"3377\" data-end=\"3388\"\u003eWeight:\u003c\/strong\u003e 7.5kg (without guide bar and chain)\u003cbr data-start=\"3424\" data-end=\"3427\"\u003e\u003cstrong data-start=\"3427\" data-end=\"3454\"\u003eRecommended Bar Length:\u003c\/strong\u003e 63cm – 90cm \/ 25\" – 36\" \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4 data-section-id=\"zmfgfd\" data-start=\"3521\" data-end=\"3556\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"3525\" data-end=\"3554\"\u003eWhy Choose This Chainsaw:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp data-start=\"3558\" data-end=\"3961\"\u003eThe STIHL MS 661 C-M Petrol Chainsaw is designed for professional forestry operators who require maximum cutting performance, durability and reliability for the most demanding timber harvesting applications. Its powerful 91.1cc engine delivers exceptional torque and cutting speed, making it ideal for felling and processing large hardwood trees and heavy timber. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"3963\" data-end=\"4364\"\u003eThe advanced STIHL M-Tronic system continuously monitors engine operating conditions and automatically adjusts fuel metering and ignition timing to maintain optimum performance regardless of temperature, altitude or fuel quality. This provides consistent power delivery, improved throttle response and simplified operation without manual carburettor adjustment. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"4366\" data-end=\"4690\"\u003eDespite its immense cutting power, the MS 661 C-M maintains an impressive power-to-weight ratio, helping improve manoeuvrability and reduce operator fatigue during prolonged forestry work. The anti-vibration system and ergonomic design also enhance comfort during intensive daily use. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"4692\" data-end=\"5023\"\u003eProfessional users frequently praise the MS 661 C-M for its enormous cutting power, reliability and suitability for long-bar applications and chainsaw milling. Many forestry professionals consider it one of the best large-capacity professional chainsaws available for heavy-duty timber work. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4 data-section-id=\"ggv70b\" data-start=\"5025\" data-end=\"5055\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"5029\" data-end=\"5053\"\u003eProduct Information:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp data-start=\"5057\" data-end=\"5156\"\u003eAs with all STIHL professional forestry chainsaws, the MS 661 C-M is packed with advanced features:\u003c\/p\u003e\n\u003cul data-start=\"5158\" data-end=\"5854\"\u003e\n\u003cli data-section-id=\"1a4aynt\" data-start=\"5158\" data-end=\"5204\"\u003eSTIHL 2-MIX low-emission engine technology\u003c\/li\u003e\n\u003cli data-section-id=\"7p6pzp\" data-start=\"5205\" data-end=\"5259\"\u003eSTIHL M-Tronic electronic engine management system\u003c\/li\u003e\n\u003cli data-section-id=\"1pshgxv\" data-start=\"5260\" data-end=\"5300\"\u003eHD2 heavy-duty air filtration system\u003c\/li\u003e\n\u003cli data-section-id=\"1wol4na\" data-start=\"5301\" data-end=\"5335\"\u003eVariable-displacement oil pump\u003c\/li\u003e\n\u003cli data-section-id=\"5q2eyp\" data-start=\"5336\" data-end=\"5388\"\u003eSTIHL anti-vibration system for improved comfort\u003c\/li\u003e\n\u003cli data-section-id=\"q4wnur\" data-start=\"5389\" data-end=\"5430\"\u003eSTIHL Ematic chain lubrication system\u003c\/li\u003e\n\u003cli data-section-id=\"qvyxq6\" data-start=\"5431\" data-end=\"5471\"\u003eSide-mounted chain tensioning system\u003c\/li\u003e\n\u003cli data-section-id=\"o95rdz\" data-start=\"5472\" data-end=\"5522\"\u003eManual decompression valve for easier starting\u003c\/li\u003e\n\u003cli data-section-id=\"1gcxt01\" data-start=\"5523\" data-end=\"5553\"\u003eCaptive nut sprocket cover\u003c\/li\u003e\n\u003cli data-section-id=\"1lxanqj\" data-start=\"5554\" data-end=\"5592\"\u003eTool-free fuel and oil filler caps\u003c\/li\u003e\n\u003cli data-section-id=\"b1st9\" data-start=\"5593\" data-end=\"5642\"\u003eProfessional magnesium crankcase construction\u003c\/li\u003e\n\u003cli data-section-id=\"uyrjk\" data-start=\"5643\" data-end=\"5686\"\u003eOptimised balance for improved handling\u003c\/li\u003e\n\u003cli data-section-id=\"1135iml\" data-start=\"5687\" data-end=\"5747\"\u003eDurable construction for intensive forestry applications\u003c\/li\u003e\n\u003cli data-section-id=\"u942sn\" data-start=\"5748\" data-end=\"5854\"\u003eCompetition-grade performance used in STIHL TIMBERSPORTS® events \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"5856\" data-end=\"6189\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eThe STIHL MS 661 C-M is the ideal choice for professional forestry workers, timber harvesting contractors and chainsaw milling operators seeking an extremely powerful, highly durable and technologically advanced petrol chainsaw capable of delivering exceptional cutting performance in the toughest professional forestry environments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mt-3 w-full empty:hidden\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"STIHL","offers":[{"title":"STIHL MS661 C-M 28\"\/71cm","offer_id":58165428453757,"sku":"S4-MS661C-M-28","price":1165.83,"currency_code":"GBP","in_stock":true},{"title":"STIHL MS661 C-M 36\"\/90cm","offer_id":58165428486525,"sku":"S4-MS661C-M-36","price":1182.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/9190\/9056\/files\/img_4_285211b1-07c2-4db5-80e3-f2cfa97bd5df.jpg?v=1778684157","url":"https:\/\/ripongroundcare.com\/products\/stihl-ms661-c-m-petrol-chainsaw","provider":"Ripon Ground Care","version":"1.0","type":"link"}