{"product_id":"stihl-ms-391-petrol-chainsaw","title":"MS 391 Petrol Chainsaw","description":"\u003ch1\u003eSTIHL MS 391 Petrol Chainsaw – High-Torque Farm and Estate Saw\u003c\/h1\u003e\n\u003cdiv style=\"margin:24px 0; padding:26px; border:1px solid #e5e7eb; border-left:3px solid #f47a20; border-radius:20px; background:#f7f7f7; font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;\"\u003e\n\u003cdiv style=\"display:flex; align-items:center; margin-bottom:8px;\"\u003e\n\u003cspan style=\"display:inline-block; width:6px; height:6px; border-radius:50%; background:#f47a20; margin-right:10px;\"\u003e\u003c\/span\u003e\u003ch3 style=\"margin:0; font-size:18px; font-weight:600; color:#1c1f27; letter-spacing:-0.01em;\"\u003eFree Spare Chain Available\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin:0 0 12px; font-size:14px; line-height:1.5; color:#f47a20; font-weight:700;\"\u003eWorth £20–£40 depending on model\u003c\/p\u003e\n\u003cp style=\"margin:0 0 16px; font-size:14px; line-height:1.8; color:#4b5563;\"\u003eWhen you add this STIHL chainsaw to your cart, your free matching chain will appear automatically. Simply click \u003cstrong\u003e\"Add Free Item\"\u003c\/strong\u003e in the cart to include it with your order.\u003c\/p\u003e\n\u003cul style=\"margin:0 0 16px 18px; padding:0; font-size:13.5px; line-height:1.85; color:#4b5563;\"\u003e\n\u003cli\u003eMatching chain for this model\u003c\/li\u003e\n\u003cli\u003eIdeal for quick swaps on the job\u003c\/li\u003e\n\u003cli\u003eHelps reduce downtime\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr style=\"border:none; border-top:1px solid #e5e7eb; margin:16px 0;\"\u003e\n\u003cp style=\"margin:0; font-size:12.5px; line-height:1.7; color:#6b7280;\"\u003eYour free chain will appear in the cart — just click \u003cstrong\u003e\"Add Free Item\"\u003c\/strong\u003e before checkout.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003eThe \u003cstrong\u003eSTIHL MS 391\u003c\/strong\u003e is a high-torque petrol chainsaw built for demanding agricultural, estate and firewood work. A 64.1cc 2-MIX engine delivers 3.3 kW (4.5 hp) at 6.3 kg without bar and chain, with bar lengths from 35–50 cm (14–20\"). The 2-MIX engine delivers strong torque across a wide rev range with lower fuel consumption and reduced emissions compared to conventional 2-stroke designs — ideal for users who need a capable ground saw for regular heavy-duty cutting. In stock at Gustharts as an authorised STIHL dealer, with free UK delivery over £75.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e64.1cc 2-MIX Engine, 3.3 kW\u003c\/strong\u003e – Strong torque for firewood processing, larger timber and sustained farm cutting work.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6.3 kg Without Bar and Chain\u003c\/strong\u003e – Well-balanced for a 64cc saw; manageable for extended ground-based use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e35–50 cm Bar Compatibility\u003c\/strong\u003e – Covers farm and estate applications from fencing and hedge clearance through to firewood logs and windblown timber.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControlled-Delivery Oil Pump with Ematic System\u003c\/strong\u003e – Reduces chain oil consumption while maintaining reliable bar and chain lubrication.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong-Life Air Filter System\u003c\/strong\u003e – Pre-separation and HD2 filter for extended service intervals in dusty field conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompensator Carburettor\u003c\/strong\u003e – Maintains consistent engine performance as the air filter loads between cleanings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManual Decompression Valve\u003c\/strong\u003e – Reduces pull effort for easier cold and hot starts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide-Mounted Chain Tensioning\u003c\/strong\u003e – Tool-free chain adjustments on site.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSTIHL Anti-Vibration System\u003c\/strong\u003e – Reduces hand-arm vibration for comfort during longer cutting sessions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool-Free Fuel and Oil Caps\u003c\/strong\u003e – Fast refuelling without tools in the field.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse; border:1px solid #e5e5e5; border-radius:20px; overflow:hidden; font-size:14px; line-height:1.5; color:#111;\"\u003e\n\u003ccolgroup\u003e\n\u003ccol style=\"width:42%\"\u003e\n\u003ccol style=\"width:58%\"\u003e\n\u003c\/colgroup\u003e\n\u003ctr\u003e\n\u003cth style=\"background:#f8f8f8; font-weight:600; text-align:left; padding:18px 20px; border-bottom:1px solid #e5e5e5;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"background:#f8f8f8; font-weight:600; text-align:left; padding:18px 20px; border-bottom:1px solid #e5e5e5;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:18px 20px; border-bottom:1px solid #e5e5e5;\"\u003eDisplacement\u003c\/td\u003e\n\u003ctd style=\"padding:18px 20px; border-bottom:1px solid #e5e5e5;\"\u003e64.1cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:18px 20px; border-bottom:1px solid #e5e5e5;\"\u003ePower Output\u003c\/td\u003e\n\u003ctd style=\"padding:18px 20px; border-bottom:1px solid #e5e5e5;\"\u003e3.3 kW (4.5 hp)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:18px 20px; border-bottom:1px solid #e5e5e5;\"\u003eWeight (without bar and chain)\u003c\/td\u003e\n\u003ctd style=\"padding:18px 20px; border-bottom:1px solid #e5e5e5;\"\u003e6.3 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:18px 20px; border-bottom:1px solid #e5e5e5;\"\u003eRecommended Bar Length\u003c\/td\u003e\n\u003ctd style=\"padding:18px 20px; border-bottom:1px solid #e5e5e5;\"\u003e35–50 cm (14–20\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:18px 20px; border-bottom:1px solid #e5e5e5;\"\u003eChain Pitch\u003c\/td\u003e\n\u003ctd style=\"padding:18px 20px; border-bottom:1px solid #e5e5e5;\"\u003e.325\" RS Pro\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:18px 20px;\"\u003eEngine Management\u003c\/td\u003e\n\u003ctd style=\"padding:18px 20px;\"\u003eCompensator carburettor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWhy Choose the STIHL MS 391?\u003c\/h2\u003e\n\u003cp\u003eThe MS 391 sits above the MS 271 and MS 291 in the STIHL farm and estate range, offering more displacement and torque for users who regularly tackle larger-diameter timber, heavy firewood volumes or sustained daily cutting work. It is not an M-Tronic saw — the compensator carburettor handles filter loading well but does require periodic manual carburettor checks for altitude or fuel changes. For farm and estate users who want reliable heavy-duty performance without stepping into the full professional forestry range, the MS 391 is the natural ceiling in this category.\u003c\/p\u003e\n\u003ch2\u003eComplete Your Kit\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/en-eu\/collections\/chainsaw-chains\" style=\"color:#1c1f27;\"\u003eReplacement Chainsaw Chains\u003c\/a\u003e – .325\" RS Pro chains compatible with the MS 391\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/en-eu\/collections\/stihl-chainsaw-guide-bars\" style=\"color:#1c1f27;\"\u003eChainsaw Guide Bars\u003c\/a\u003e – 35–50 cm bars for this model\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/en-eu\/collections\/fuel-oil\" style=\"color:#1c1f27;\"\u003e2-Stroke Oil and Fuel\u003c\/a\u003e – STIHL HP Ultra and MotoMix for 2-MIX engines\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/en-eu\/collections\/filing-kits-guides-sharpening\" style=\"color:#1c1f27;\"\u003eChain Sharpening Tools\u003c\/a\u003e – filing kits for .325\" chain maintenance\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/en-eu\/collections\/chainsaw-clothing-ppe\" style=\"color:#1c1f27;\"\u003eChainsaw PPE\u003c\/a\u003e – trousers, helmet, gloves and boots for compliant ground-based cutting\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFAQs\u003c\/h2\u003e\n\u003ch3\u003eHow does the MS 391 compare to the MS 291?\u003c\/h3\u003e\n\u003cp\u003eThe MS 391 is larger at 64.1cc and 3.3 kW versus the MS 291 at 55.5cc and 2.8 kW. It delivers more torque for larger-diameter timber and heavier firewood work, at the trade-off of slightly more weight at 6.3 kg versus 5.6 kg.\u003c\/p\u003e\n\u003ch3\u003eWhat bar lengths are compatible with the MS 391?\u003c\/h3\u003e\n\u003cp\u003eSTIHL recommend 35–50 cm (14–20\") guide bars using .325\" RS Pro chain. Gustharts stocks compatible options.\u003c\/p\u003e\n\u003ch3\u003eDoes the MS 391 have M-Tronic?\u003c\/h3\u003e\n\u003cp\u003eNo — the MS 391 uses a compensator carburettor rather than M-Tronic electronic engine management. Manual carburettor adjustment may be needed for significant altitude or fuel quality changes.\u003c\/p\u003e\n\u003ch3\u003eIs the MS 391 suitable for chainsaw milling?\u003c\/h3\u003e\n\u003cp\u003eIt can be used with smaller Alaskan mill setups at the shorter end of its bar range, but for serious milling the MS 462 C-M or MS 500i are better matched for sustained load.\u003c\/p\u003e\n\u003ch3\u003eIs the MS 391 suitable for homeowners?\u003c\/h3\u003e\n\u003cp\u003eIt is a heavy-duty ground saw best suited to farm, estate and professional users with regular cutting demands. For occasional domestic firewood use, the MS 271 or MSA 200 C-B are more appropriate.\u003c\/p\u003e","brand":"Stihl","offers":[{"title":"16\"","offer_id":45717598208244,"sku":"MS-1140 200 0747","price":836.95,"currency_code":"EUR","in_stock":true},{"title":"18\"","offer_id":45717598241012,"sku":"MS-1140 200 0731","price":846.95,"currency_code":"EUR","in_stock":true},{"title":"20\"","offer_id":45717598273780,"sku":"MS-1140 200 0741","price":854.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0690\/6603\/1348\/files\/STIHL-MS-391-Petrol-Chainsaw.png?v=1756822153","url":"https:\/\/www.gustharts.com\/en-eu\/products\/stihl-ms-391-petrol-chainsaw","provider":"Gustharts","version":"1.0","type":"link"}